WO2011072592A1 - Method, apparatus and base station for clipping - Google Patents

Method, apparatus and base station for clipping Download PDF

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Publication number
WO2011072592A1
WO2011072592A1 PCT/CN2010/079688 CN2010079688W WO2011072592A1 WO 2011072592 A1 WO2011072592 A1 WO 2011072592A1 CN 2010079688 W CN2010079688 W CN 2010079688W WO 2011072592 A1 WO2011072592 A1 WO 2011072592A1
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Prior art keywords
signal
frequency band
signals
frequency
clipping
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PCT/CN2010/079688
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French (fr)
Chinese (zh)
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陈亮
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华为技术有限公司
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Publication of WO2011072592A1 publication Critical patent/WO2011072592A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/7163—Spread spectrum techniques using impulse radio
    • H04B1/71632—Signal aspects

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a clipping method, apparatus, and base station.
  • Digital intermediate frequency is used as an intermediate bridge connecting a baseband and a radio frequency to undertake a plurality of power amplifier protection and linearization technologies.
  • Clipping as a technique for protecting a power amplifier is also implemented in a digital intermediate frequency to reduce the peak-to-average ratio of a baseband signal (Peak- to-Average Ratio, PAR).
  • PAR Peak-to-average ratio of a baseband signal
  • a multi-band base station is a base station that can simultaneously support two or more frequency bands, and the base station can adapt to different frequency requirements of different countries and regions.
  • the inventors of the present application found that in order to ensure the clipping effect in the combined clipping scheme, the clipping rate needs to be greater than twice the signal bandwidth (the total bandwidth of the combined signal).
  • the multi-band signal combined signal (ultra-wideband signal) has a wide bandwidth, which makes it difficult for the existing logic processing device to realize the combined clipping processing of the ultra-wideband signal in the digital domain. Summary of the invention
  • a clipping method and a clipping device are provided, and clipping of an ultra-wideband signal can be realized.
  • One aspect of the present invention provides a clipping method, including Performing spectrum shifting on at least two frequency band signals output by the baseband, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signals of each frequency band satisfy the requirements of the combined clipping;
  • Another aspect of the present invention provides a clipping device, including
  • the spectrum shifting unit is configured to perform spectrum shifting on at least two frequency band signals output by the baseband, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signal of each frequency band satisfy the requirements of the combined clipping;
  • a combined clipping unit connected to the spectrum shifting unit for combining and clipping the frequency band signals after the spectrum shifting
  • a signal separation unit which is connected to the combined clipping unit, and is configured to separate the combined signal output after the combined clipping unit is combined and split, and separate each frequency band signal;
  • the spectrum shifting and combining unit is configured to perform spectrum shifting and combining on each of the separated signals, so that the spectral interval between each frequency band signal after spectrum shifting and combining meets the requirements of the ultra-wideband signal.
  • Still another aspect of the present invention provides a base station including the clipping device provided by the present invention.
  • the clipping method, device and base station provided by the embodiments of the present invention firstly perform spectrum shifting and combining signals of two or more frequency band signals outputted by the baseband according to the requirements of the combined clipping to complete the combined clipping and clipping. After completion, each band signal is separately filtered out, and then the filtered signal is spectrally shifted and combined to make it an ultra-wideband signal. Through the pre-combination clipping of the signal, the UWB signal outputted by the combined clipping is realized.
  • 1 is a flow chart of a signal combining method for clipping according to an embodiment of the present invention
  • 2 is a flow chart of a signal combining method clipping method according to Embodiment 2 of the present invention
  • FIG. 3 is a flow chart of a method for clipping a signal combining path according to an embodiment of the present invention
  • FIG. 4 is a schematic structural view of a four-signal combined path clipping device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a signal combining path clipping device according to a fifth embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a fifth spectrum shifting and combining unit according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic structural diagram of a spectrum shifting and combining unit according to a fifth embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • FIG. 1 A signal combining method for clipping, the flow chart is shown in Figure 1, including:
  • each signal of the baseband output is based on a "zero" frequency point
  • the process of performing spectrum shifting can be implemented by a digital up converter (Digital Up Converter, DUC).
  • DUC Digital Up Converter
  • the spectrum shifting can be performed by different DUCs for each carrier signal in each frequency band signal, or by different DUCs for spectrum shifting of each frequency band signal.
  • the spectral interval between the signals of each frequency band after the shift and the frequency of the signal of each frequency band satisfy the requirements of the combined clipping, which may be under the premise that the system can provide the logical resources for the combined clipping
  • the spectral spacing required between the signals in each band after the spectrum shift is performed. Since the combined clipping is usually performed in the digital domain, the logic clock frequency of the digital domain is usually not higher than 400M. Therefore, the spectrum shift of the two-way or more-band signals of the baseband output is shifted to the digital domain spectrum. Limited to the signal sampling rate, the frequency of each band after the shift is at a lower frequency (in the range of a Quest region) and not higher than the logical clock frequency at the combined clipping.
  • the signal output after the combined clipping is separated again;
  • the clipping output signal is not an ultra-wideband signal
  • the frequency of each frequency band signal and the spectral interval between each frequency band signal do not satisfy the requirements of the system, and the signal of the combined clipping output signal needs to be re-synchronized. Move and combine.
  • each signal needs to be separated, and the specific separation method can adopt various existing methods.
  • the digital down converter can be used to perform spectral shifting (moving to zero frequency) on the combined signal of the combined clipping output, and then filtering out each frequency band signal using a low pass filter.
  • the signals output by the combined clipping include: signal X and signal Y; signal X is in the M band; signal Y is in the N band;
  • the spectrum output of the combined clipping output signal can be moved, the frequency of the signal X can be moved to the zero frequency point, and then the signal is filtered out using the low-pass filter, and the signal is obtained. X.
  • the signal Y can be obtained. It can be understood that the foregoing method for separating signals is only a specific example of the embodiment of the present invention. Based on the support of the prior art, the signal separation in the embodiment of the present invention may also have multiple feasible implementation manners, and the specific implementation manner does not constitute Limitations of the invention.
  • the requirements for ultra-wideband signals including the spectral spacing between signals in each band of the ultra-wideband signal, are met to meet the requirements of different operators. If the signal obtained by the spectrum shifting and combining processing in step 4 is transmitted after power amplification, the frequency of each frequency band signal that has undergone spectrum shifting in step 4 also satisfies the frequency of each frequency band signal as a radio frequency signal. The frequency requirements, in order to meet the requirements of the frequency of different communication systems, to achieve the flexible configuration of the signal in different frequency bands.
  • the requirements of the ultra-wideband signal may include requirements for the spectral spacing between the signals of each frequency band (and since the spectral spacing between the signals of each frequency band is directly related to the frequency of the signal of each frequency band, it is also possible It is understood as the requirement for the frequency of the signal of each frequency band ;), and the requirement of the frequency of the signal of each frequency band can also be understood as the requirement of the RF signal.
  • the combined signal has the same PAR as the combined clipping signal in the ⁇ 2 step. In theory, this can be basically equivalent to the realization of the clipping processing of the ultra-wideband signal.
  • the power amplifier can be prevented from entering the saturation state, thus reducing the linear pressure of the power amplifier.
  • the signal can be amplified by the power amplifier and then passed through the duplexer into the antenna through the antenna. Launched.
  • the clipping frequency of the combined clipping processing logic device is greater than twice the signal bandwidth to achieve a better clipping effect, so the clipping rate is at least the signal bandwidth of each frequency band. And 3 times.
  • the clipping rate is preferably more than three times the signal bandwidth plus the spacing between the frequency bands of all signal bands.
  • the clipping frequency of the combined clipping logic device, Space is the frequency-pan interval of the signal X and the signal Y.
  • the spectrum between the signals of each frequency band should not be too large or too small when the spectrum is moved before the combined clipping. Excessive consumption consumes more logic resources. If it is too small, it will affect the PAR of the combined signal. It is also not conducive to the design of the low-pass filter (the signal spacing is small, the low-pass filter transition band is narrow, resulting in an increase in the order, Consume more logical resources). It is found from a large number of simulations that the inter-band spacing is not less than the bandwidth of the two bands, that is,
  • signal X is in frequency band 1
  • signal Y is in frequency band 2;
  • each carrier of band 1 can be moved to Space/2+(n x _ 1/2)* BW C , and each carrier of band 2 is moved to -Space/2-(ny-l/2)*BW c .
  • Space is the two-band spacing
  • BW C is the carrier bandwidth
  • n x c N x , n y c N y , N x , N y the number of carriers contained in each frequency band signal, “ x and the carrier of the corresponding carrier Numbering.
  • FIG. 2 A signal combining method for clipping, the flow chart is shown in Figure 2, including:
  • the separated signals of each frequency band are respectively moved to the different frequency points and combined by the DUC, so that the spectral interval between the signals of each frequency band after the combining meets the requirements of the ultra-wideband signal.
  • the method may further include:
  • step B6 performing spectrum shifting on the analog combined signal obtained in step B5, so that the frequency of each frequency band signal in the analog combined signal after the spectrum shift satisfies the requirements of the radio frequency signal.
  • the signal is separated and recombined after the signal is combined in the digital domain, which is equivalent to the clipping processing of the ultra-wideband signal in the digital domain, so that the digital-to-analog conversion is performed in the step B5.
  • the data of D AC Digital- Analog Converter
  • the analog combined signal outputted in step B6 can also obtain the same PA signal before the input power amplifier, so as to reduce the nonlinear distortion of the power amplifier.
  • FIG. 3 A signal combining method for clipping, the flow chart is shown in Figure 3, including:
  • two or more signals of the baseband output are digital signals.
  • spectrum shifting can be performed by single sideband modulation.
  • the process of performing unilateral modulation may be: modulating the separated analog signal into signals by the modulator to other manners, and does not affect the implementation of the embodiment of the present invention.
  • the method further includes: converting the combined signal to the antenna after power amplification.
  • the frequency of the signal of each frequency band after the spectrum shift in the step C4 may also not meet the requirements of the radio frequency signal, so that after the step C5, the spectrum of the combined signal may be moved, so that the signal after the combined signal is The frequency of each frequency band signal satisfies the requirements of the radio frequency signal, and then the power is amplified and then input to the antenna for transmission.
  • the logic resources required for digital-to-analog conversion can be reduced, that is, the logic resources required for the ultra-wideband signal combining and clipping are reduced.
  • the signal combining and clipping device provided by the embodiment of the present invention will be described below. For the convenience of description, only parts related to the embodiment of the present invention are shown.
  • the clipping device can be implemented in a logic device, such as a Field Programmable Gate Array (FPGA), or an integrated circuit, such as an Application Specific Integrated Circuit (ASIC);
  • the clipping device can be located in a multi-band base station, in particular in a transmitter of a multi-band base station.
  • a signal combining path clipping device the structure diagram is shown in Figure 4, including:
  • the spectrum shifting unit 410 is configured to perform spectrum shifting on two or more frequency band signals output by the baseband, so that the spectral interval between the signals after each shift and the frequency of each frequency band after the shifting meet the combined path Clipping requirements;
  • the combining and clipping unit 420 is connected to the spectrum shifting unit 410, and performs combined clipping for the two or more frequency band signals after the spectrum shifting;
  • the signal separation unit 430 is connected to the combined clipping unit, and re-separates the combined signal output after the combined clipping unit is combined and clipped, and separates each frequency band signal;
  • the spectrum shifting and combining unit 440 is configured to perform spectrum shifting and combining processing on the separated signals of each frequency band, so that the spectral interval between the combined frequency band signals satisfies the ultra-wideband signal requirement.
  • the spectrum shift combining unit 410 can be a digital up converter DUC.
  • the signal is clipped to require a higher signal sampling frequency, and the baseband output signal can also be upsampled.
  • the upsampling process is usually performed by a filter and an interpolation process.
  • a signal combining path clipping device the structure diagram is shown in Figure 4, including:
  • the digital up-converter 510 is configured to perform spectrum shifting on at least two frequency band signals of the baseband output, so that the spectral interval between the signals after the shifting and the frequency of the signal of each frequency band after the shifting meet the requirements of the combined clipping;
  • the combining and clipping unit 520 is connected to the digital up-converter 510, and performs combined clipping on at least two frequency band signals after the spectrum shifting;
  • the N-channel signal separation unit 530 is connected to the combined clipping unit, and each of the signal separation units corresponds to one frequency band signal, and the combined signal outputted by the combined clipping unit 520 is combined and separated, and each is separated.
  • the frequency band signal; specifically, each signal separation unit 530 may include:
  • the digital down-conversion 5301 is used to move each frequency band signal to zero frequency according to the frequency point of each frequency band signal in the signal after the combined clipping unit 520 is combined; it should be understood that the digital down conversion
  • the DDC can also be implemented by other frequency shifting units;
  • the low pass filter 5302 is configured to filter each frequency band signal that is moved to zero frequency to complete the separation of the signals in each frequency band. Since each band signal has been moved to zero frequency, each band signal can be separated by a low-pass filter, or it can be implemented by other suitable filters.
  • the spectrum shifting and combining unit 540 is configured to perform spectrum shifting and combining processing on the separated signals of each frequency band, so that the spectrum spacing between the signals of each frequency band satisfies the requirements of the ultra-wideband signal;
  • the spectrum shifting and combining unit 540 can perform spectrum shifting by using a modulator to perform single-sideband modulation on the signal in the radio frequency unit;
  • the spectrum shift combining unit 540 can be implemented by an analog method or by a digital method.
  • the spectrum shifting unit 540 may include:
  • Each of the digital-to-analog conversion sub-units 5401 corresponds to a frequency band signal separated by a signal separation unit 530, and is configured to convert each frequency band signal separated by the signal separation unit 530 into an analog signal;
  • the N-channel first modulation sub-unit 5402 is configured to perform spectrum shifting on the analog signal converted by the digital-to-analog conversion sub-unit 5401 so that the frequency of each frequency band signal satisfies the requirements of the radio frequency signal and the spectrum between the signals of each frequency band.
  • the interval meets the requirements of the ultra-wideband signal;
  • the analog combining sub-unit 5403 is configured to combine the N signals output by the N first modulation sub-units 5402 to form an ultra-wideband signal.
  • the frequency of each frequency band signal after the spectrum shifting by the N first modulation subunit 5402 can meet the requirements of the radio frequency signal, so that the signal output from the analog combining subunit 5403 can be transmitted after being amplified by power.
  • the frequency of each frequency band signal subjected to spectrum shifting by the N-channel first modulation sub-unit 5402 may not satisfy the requirements of the radio frequency signal, and thus the spectrum output from the analog combining sub-unit 5403 may be subjected to spectrum shifting.
  • the frequency of each frequency band signal in the signal behind the road satisfies the requirements of the radio frequency signal, and then the power is amplified and input to the antenna for transmission.
  • the spectrum shifting unit 540 When implemented in a digital manner, the spectrum shifting unit 540, as shown in FIG. 7, may include:
  • the N-channel frequency shifting sub-unit 5404, each frequency-shifting sub-unit 5404 corresponding to the frequency band signal separated by the one-way signal separating unit 530, is used for performing spectrum shifting on each frequency band signal, so that the spectral interval between the signals of each frequency band is satisfied.
  • the requirements of the ultra-wideband signal may be: moving each frequency band signal from a zero frequency to a different frequency point, so that the interval between the signals of each frequency band satisfies the requirements of the ultra-wideband signal;
  • the frequency shifting subunit may be a DUC
  • the digital combining sub-unit 5405 is configured to combine the frequency-shifted signals output by the N-way frequency shifting sub-unit 5404.
  • the spectrum shifting unit 540 can also include:
  • the digital-to-analog conversion sub-unit 5406 is configured to perform digital-to-analog conversion of the signal after the digital combining sub-unit 5405 is combined into the second modulation sub-unit 5407;
  • the second modulation subunit 5407 is configured to perform spectrum shifting on the combined signal after the digital-to-analog conversion by the digital-to-analog conversion sub-unit 5406, so that the frequency of each frequency band in the combined signal satisfies the shot. Frequency signal requirements.
  • the digital-to-analog sub-unit can be implemented by a radio frequency digital-to-analog converter (RFDAC), and the digital-to-analog sub-unit and the second sub-module can also be implemented by an RFDAC, which is a high-speed
  • RFDAC radio frequency digital-to-analog converter
  • the digital-to-analog converter can have a high clock sampling rate and can be used to move signals to high frequencies in the digital domain.
  • the signal after frequency shifting by the modulation sub-unit can be amplified by the power amplifier and then transmitted to the antenna through the duplexer, wherein the second modulation sub-unit, the power amplifier, and the duplexer can be collectively referred to as a radio frequency sub-unit.
  • An embodiment of the present invention further provides a base station, including any one of the signal combining and clipping devices according to the embodiment of the present invention.
  • the base station can in particular be a multi-band base station.
  • a plurality of frequency band signals are combined and clipped in a case where the frequency band interval is small, thereby reducing the rate of combined clipping, thereby reducing the logic resources required for the combined clipping, and clipping
  • the spectrum interval of the two frequency bands is pulled apart to meet the requirement of ultra-wideband, and the signal is combined and clipped at a lower frequency, which reduces the requirements for the device for clipping processing and reduces the PAR of the signal output.
  • the signal combining and clipping device provided in the embodiment of the present invention may be located in a multi-band base station, and may also be applied to other scenes where the signal is combined and clipped.
  • the spectrum shifting in the embodiment of the present invention may be implemented by using a digital up-conversion DUC or a digital down-conversion DDC, and other spectrum shifting modes may be used, which are not limited in the embodiment of the present invention.
  • the names of some devices or modules in the embodiments of the present invention may be changed according to different technical developments or application scenarios, but this does not affect the implementation of the embodiments of the present invention, and these changes should also fall into the present invention. Protected.
  • the partitioning of some modules or units in the embodiments of the present invention only identifies the functions implemented, and these modules or units may be physically combined or split.

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Abstract

The embodiments of the present invention disclose a method, apparatus and base station for signal combination clipping. The method for signal combination clipping includes: performing frequency spectrum shift on at least two frequency band signals output from baseband, so as to make the frequency spectrum interval among each shifted frequency band signal and the frequency point of each frequency band signal satisfy requirements of the combination clipping; performing combination clipping on at least two frequency band signals which have been shifted; separating signals of each frequency band from the combination signals output after the combination clipping, and performing frequency spectrum shift and combination processing on each separated frequency band signal, so as to make the frequency interval and the frequency point of each frequency band signal which has been shifted and combined satisfy requirements of ultra wide band signal. Using the signal combination clipping method, apparatus and base station provided by the embodiments of the present invention can enable outputting combination clipped ultra wide band signals by performing pre-combination clipping processing on the baseband signals.

Description

削波方法、 装置和基站 本申请要求了 2009年 12月 15日提交的， 申请号为 200910189006.7， 发 明名称为"信号合路削波方法、 装置和基站"的中国专利申请的优先权， 其全 部内容通过引用结合在本申请中。 技术领域  Clipping method, device and base station. The present application claims priority to Chinese Patent Application No. 200910189006.7, entitled "Signal Combining Clipping Method, Apparatus and Base Station", filed on December 15, 2009, all The content is incorporated herein by reference. Technical field
本发明涉及通信技术领域， 具体涉及削波方法、 装置和基站。 背景技术 数字中频作为连接基带和射频的中间桥梁承担了多项功放保护和线性化 技术， 削波作为保护功放的一种技术也在数字中频实现， 用以降低基带信号 的峰均比 （Peak-to-Average Ratio, PAR)。 随着技术的发展， 削波方法和种类也在不断发展， 各种削波方法会根据 信号不同的特点、 不同的场景需求等因素采用不同的削波策略， 他们之间主 要区别是在提噪和噪声处理方式上。 在包含多个载波的单频段工作时， 为了控制多个载波合路后的 PAR， 需 要将多个载波信号合路后再进行削波处理。 多频段基站是指能同时支持两个或两个以上频段共同工作的基站， 这种 基站可以适应不同国家和地区对频段不同的要求。 随着多频段基站的出现， 如何实现可以同时支持多频段信号的基站， 成为热点研究的问题。 在对现有技术的研究和实践过程中， 本申请的发明人发现， 合路削波方 案中为了保证削波效果， 削波的速率需要大于信号带宽（合路信号的总带宽） 的 2倍以上， 而多频段信号合路后的信号 （超宽带信号） 带宽较宽， 使得现 有的逻辑处理器件很难实现超宽带信号在数字域的合路削波处理。 发明内容  The present invention relates to the field of communications technologies, and in particular, to a clipping method, apparatus, and base station. BACKGROUND OF THE INVENTION Digital intermediate frequency is used as an intermediate bridge connecting a baseband and a radio frequency to undertake a plurality of power amplifier protection and linearization technologies. Clipping as a technique for protecting a power amplifier is also implemented in a digital intermediate frequency to reduce the peak-to-average ratio of a baseband signal (Peak- to-Average Ratio, PAR). With the development of technology, the methods and types of clipping are also constantly developing. Various clipping methods adopt different clipping strategies according to different characteristics of signals and different scene requirements. The main difference between them is in noise extraction. And noise processing. When operating in a single frequency band containing multiple carriers, in order to control the PAR after multiple carriers are combined, it is necessary to combine multiple carrier signals before performing clipping processing. A multi-band base station is a base station that can simultaneously support two or more frequency bands, and the base station can adapt to different frequency requirements of different countries and regions. With the advent of multi-band base stations, how to implement base stations that can simultaneously support multi-band signals has become a hot research issue. In the research and practice of the prior art, the inventors of the present application found that in order to ensure the clipping effect in the combined clipping scheme, the clipping rate needs to be greater than twice the signal bandwidth (the total bandwidth of the combined signal). Above, the multi-band signal combined signal (ultra-wideband signal) has a wide bandwidth, which makes it difficult for the existing logic processing device to realize the combined clipping processing of the ultra-wideband signal in the digital domain. Summary of the invention
本发明实施例中提供削波方法和削波装置， 可以实现对超宽带信号的削 波。  In the embodiment of the present invention, a clipping method and a clipping device are provided, and clipping of an ultra-wideband signal can be realized.
本发明一方面提供了一种削波方法， 包括 对基带输出的至少两个频段信号进行频谱搬移， 使得搬移后的每个频段 信号之间的频谱间隔和每个频段信号的频点满足合路削波的要求； One aspect of the present invention provides a clipping method, including Performing spectrum shifting on at least two frequency band signals output by the baseband, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signals of each frequency band satisfy the requirements of the combined clipping;
对频谱搬移后的至少两个频段信号进行合路削波；  Performing combined clipping on at least two frequency band signals after spectrum shifting;
将合路削波后输出的合路信号进行分离， 分离出每个频段信号， 并对分 离出的每个频段信号进行频谱搬移和合路， 使得经过频谱搬移和合路的每个 频段信号之间的频谱间隔满足超宽带信号的要求。  Separating the combined signals outputted by the combined clipping, separating the signals of each frequency band, and performing spectrum shifting and combining on each of the separated signals, so that the signals are transmitted between each frequency band after the spectrum shifting and combining The spectral spacing meets the requirements of ultra-wideband signals.
本发明另一方面提供了一种削波装置， 包括  Another aspect of the present invention provides a clipping device, including
频谱搬移单元， 用于对基带输出的至少两个频段信号进行频谱搬移， 使 得搬移后的每个频段信号之间的频谱间隔和每个频段信号的频点满足合路削 波的要求；  The spectrum shifting unit is configured to perform spectrum shifting on at least two frequency band signals output by the baseband, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signal of each frequency band satisfy the requirements of the combined clipping;
合路削波单元， 与所述频谱搬移单元相连， 用于对经过频谱搬移后的频 段信号进行合路削波；  a combined clipping unit connected to the spectrum shifting unit for combining and clipping the frequency band signals after the spectrum shifting;
信号分离单元， 与所述合路削波单元相连， 用于将合路削波单元合路削 波后输出的合路信号进行分离， 分离出每个频段信号；  a signal separation unit, which is connected to the combined clipping unit, and is configured to separate the combined signal output after the combined clipping unit is combined and split, and separate each frequency band signal;
频谱搬移合路单元，用于对分离出的每个频段信号进行频谱搬移和合路， 使得经过频谱搬移和合路后的每个频段信号之间的频谱间隔满足超宽带信号 的要求。  The spectrum shifting and combining unit is configured to perform spectrum shifting and combining on each of the separated signals, so that the spectral interval between each frequency band signal after spectrum shifting and combining meets the requirements of the ultra-wideband signal.
本发明再一方面还提供了一种基站， 包括本发明所提供的削波装置。 本发明实施例提供的削波方法、 装置和基站， 先将基带输出的两个或两 个以上频段信号按照合路削波的要求进行频谱搬移并合路，以完成合路削波， 削波完成后再把每个频段信号单独滤出， 再将滤出的信号进行频谱搬移和合 路处理， 使之成为超宽带信号。 通过信号的预合路削波处理， 实现了输出经 过合路削波的超宽带信号。 附图说明  Still another aspect of the present invention provides a base station including the clipping device provided by the present invention. The clipping method, device and base station provided by the embodiments of the present invention firstly perform spectrum shifting and combining signals of two or more frequency band signals outputted by the baseband according to the requirements of the combined clipping to complete the combined clipping and clipping. After completion, each band signal is separately filtered out, and then the filtered signal is spectrally shifted and combined to make it an ultra-wideband signal. Through the pre-combination clipping of the signal, the UWB signal outputted by the combined clipping is realized. DRAWINGS
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例描述中 所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅仅是本 发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的 前提下， 还可以根据这些附图获得其他的附图。  In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.
图 1是本发明实施例一信号合路削波方法的流程图； 图 2是本发明实施例二信号合路削波方法的流程图； 1 is a flow chart of a signal combining method for clipping according to an embodiment of the present invention; 2 is a flow chart of a signal combining method clipping method according to Embodiment 2 of the present invention;
图 3是本发明实施例三信号合路削波方法的流程图；  3 is a flow chart of a method for clipping a signal combining path according to an embodiment of the present invention;
图 4是本发明实施例四信号合路削波装置的结构示意图；  4 is a schematic structural view of a four-signal combined path clipping device according to an embodiment of the present invention;
图 5是本发明实施例五信号合路削波装置的结构示意图；  FIG. 5 is a schematic structural diagram of a signal combining path clipping device according to a fifth embodiment of the present invention; FIG.
图 6是本发明实施例五频谱搬移合路单元的结构示意图；  6 is a schematic structural diagram of a fifth spectrum shifting and combining unit according to Embodiment 5 of the present invention;
图 7是本发明实施例五频谱搬移合路单元的结构示意图。 具体实施方式 下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行 清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而 不是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有做 出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。  FIG. 7 is a schematic structural diagram of a spectrum shifting and combining unit according to a fifth embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
实施例一  Embodiment 1
一种信号合路削波方法， 流程图如图 1所示， 包括：  A signal combining method for clipping, the flow chart is shown in Figure 1, including:
Al、 对基带输出的两路或两路以上频段信号进行频谱搬移， 使得搬移后 的每个频段信号之间的频谱间隔和每个频段信号的频点满足合路削波的要 求；  Al. Perform spectrum shifting on signals of two or more frequency bands of the baseband output, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signals of each frequency band satisfy the requirements of the combined clipping;
本实施例中， 基带输出的每路信号均是基于 "零" 频点的， 进行频谱搬 移的过程可以由数字上变频器（Digital Up Converter, DUC )实现。 可以理解 的是， 频谱搬移可以由不同的 DUC对每个频段信号中的每一路载波信号分别 进行频谱搬移， 也可以由不同的 DUC对每个频段信号进行频谱搬移实现。  In this embodiment, each signal of the baseband output is based on a "zero" frequency point, and the process of performing spectrum shifting can be implemented by a digital up converter (Digital Up Converter, DUC). It can be understood that the spectrum shifting can be performed by different DUCs for each carrier signal in each frequency band signal, or by different DUCs for spectrum shifting of each frequency band signal.
其中， 搬移后的每个频段信号之间的频谱间隔和每个频段信号的频点满 足合路削波的要求， 可以是在***所能提供的用于合路削波的逻辑资源的前 提下， 达到一定 PAR效果时， 频谱搬移后每个频段信号之间所需满足的频谱 间隔。 而由于合路削波通常在数字域进行， 数字域的逻辑时钟频率通常不高 于 400M， 因而此处对基带输出的两路或两路以上频段信号进行的频谱搬移为 数字域频谱搬移， 受限于信号采样率， 搬移后的每个频段信号的频点均位于 较低的频率 （一个奎斯特区范围内）， 不高于合路削波的逻辑时钟频率。  Wherein, the spectral interval between the signals of each frequency band after the shift and the frequency of the signal of each frequency band satisfy the requirements of the combined clipping, which may be under the premise that the system can provide the logical resources for the combined clipping When a certain PAR effect is achieved, the spectral spacing required between the signals in each band after the spectrum shift is performed. Since the combined clipping is usually performed in the digital domain, the logic clock frequency of the digital domain is usually not higher than 400M. Therefore, the spectrum shift of the two-way or more-band signals of the baseband output is shifted to the digital domain spectrum. Limited to the signal sampling rate, the frequency of each band after the shift is at a lower frequency (in the range of a Quest region) and not higher than the logical clock frequency at the combined clipping.
A2、 对所述频谱搬移合路后的两路或两路以上信号进行合路削波； A2, combining or splitting two or more signals after the spectrum shifting and combining;
A3、 将合路削波后输出的信号重新分离； 本实施例中， 由于削波输出信号并非超宽带信号， 每个频段信号的频点 及每个频段信号间的频谱间隔都不满足***的要求， 需要对合路削波输出的 信号重新进行频谱搬移和合路。 首先需要将每路信号分离， 具体的分离方式 可以采用现有的多种方式。 在本发明实施例中可以使用数字下变频器对合路 削波输出的合路信号进行频谱搬移（搬移至零频）， 再使用低通滤波器将每个 频段信号过滤出。 A3. The signal output after the combined clipping is separated again; In this embodiment, since the clipping output signal is not an ultra-wideband signal, the frequency of each frequency band signal and the spectral interval between each frequency band signal do not satisfy the requirements of the system, and the signal of the combined clipping output signal needs to be re-synchronized. Move and combine. First, each signal needs to be separated, and the specific separation method can adopt various existing methods. In the embodiment of the present invention, the digital down converter can be used to perform spectral shifting (moving to zero frequency) on the combined signal of the combined clipping output, and then filtering out each frequency band signal using a low pass filter.
以步骤 A1中分离两路信号为例： 合路削波输出的信号包括： 信号 X和信 号 Y; 信号 X在 M频段； 信号 Y在 N频段；  Taking the two signals separated in step A1 as an example: the signals output by the combined clipping include: signal X and signal Y; signal X is in the M band; signal Y is in the N band;
那么如果需要将信号 X分离出来， 则可以对合路削波输出的信号进行频 谱搬移， 将信号 X的频点搬移到零频点， 然后使用低通滤波器滤除信号¥， 则 获得了信号 X。  Then, if the signal X needs to be separated, the spectrum output of the combined clipping output signal can be moved, the frequency of the signal X can be moved to the zero frequency point, and then the signal is filtered out using the low-pass filter, and the signal is obtained. X.
同理， 可以获得信号 Y。 可以理解， 以上分离信号的方式仅仅作为本发 明实施例的一个具体例子， 基于现有技术的支持， 本发明实施例中进行信号 分离还可以有多种可行的实现方式，具体的实现方式不构成对本发明的限制。  In the same way, the signal Y can be obtained. It can be understood that the foregoing method for separating signals is only a specific example of the embodiment of the present invention. Based on the support of the prior art, the signal separation in the embodiment of the present invention may also have multiple feasible implementation manners, and the specific implementation manner does not constitute Limitations of the invention.
Α4， 对分离出的两路或两路以上频段信号进行频谱搬移和合路处理， 使 每个频段信号之间的频谱间隔满足超宽带信号的要求。  Α4, performing spectrum shifting and combining processing on the separated signals of two or more frequency bands, so that the spectral interval between signals in each frequency band satisfies the requirements of ultra-wideband signals.
应当理解的是， 满足超宽带信号的要求， 包括超宽带信号中对每个频段 信号之间的频谱间隔的要求， 以满足不同运营商的要求。 如若 Α4步骤经过频 谱搬移和合路处理所获得的信号经过功率放大后即可发射出去， 则 Α4步骤中 经过频谱搬移的每个频段信号的频点还满足对每个频段信号的频点为射频信 号的频率的要求， 以便满足不同通信制式对频点的要求， 实现信号在高频不 同频段灵活配置的要求。 应当理解的是， 超宽带信号的要求可以包括对每个 频段信号之间的频谱间隔有要求（而由于每个频段信号之间的频谱间隔和每 个频段信号的频点直接相关， 因而也可以理解为对每个频段信号的频点的要 求；)， 而对于每个频段信号的频点的要求还可以理解为对射频信号的要求。 Α4步骤中合路后信号具有与 Α2步骤中合路削波后的信号相同的 PAR， 理论 上， 这样就可以基本等同于实现了对超宽带信号的削波处理。 由于 A4步骤中 合路后信号具有较低的 PAR， 可以避免功率放大器进入饱和状态， 这样就减 轻了功率放大器的线性压力， 信号可以在经过功率放大器放大后再通过双工 器进入天线， 经由天线发射出去。 在 A2步骤中， 一般情况下， 进行合路削波处理逻辑器件的削波频率要大 于信号带宽的 2倍以上才能取得较好的削波效果，所以削波速率至少是每个频 段信号带宽之和的 3倍。 It should be understood that the requirements for ultra-wideband signals, including the spectral spacing between signals in each band of the ultra-wideband signal, are met to meet the requirements of different operators. If the signal obtained by the spectrum shifting and combining processing in step 4 is transmitted after power amplification, the frequency of each frequency band signal that has undergone spectrum shifting in step 4 also satisfies the frequency of each frequency band signal as a radio frequency signal. The frequency requirements, in order to meet the requirements of the frequency of different communication systems, to achieve the flexible configuration of the signal in different frequency bands. It should be understood that the requirements of the ultra-wideband signal may include requirements for the spectral spacing between the signals of each frequency band (and since the spectral spacing between the signals of each frequency band is directly related to the frequency of the signal of each frequency band, it is also possible It is understood as the requirement for the frequency of the signal of each frequency band ;), and the requirement of the frequency of the signal of each frequency band can also be understood as the requirement of the RF signal. In the Α4 step, the combined signal has the same PAR as the combined clipping signal in the Α2 step. In theory, this can be basically equivalent to the realization of the clipping processing of the ultra-wideband signal. Since the signal after the combination in the A4 step has a lower PAR, the power amplifier can be prevented from entering the saturation state, thus reducing the linear pressure of the power amplifier. The signal can be amplified by the power amplifier and then passed through the duplexer into the antenna through the antenna. Launched. In the A2 step, in general, the clipping frequency of the combined clipping processing logic device is greater than twice the signal bandwidth to achieve a better clipping effect, so the clipping rate is at least the signal bandwidth of each frequency band. And 3 times.
在 A1步骤中， 为了使信号在 A4步骤合路后信号 PAR不抬升， 在 A1步骤中 的每个频段信号移频时， 频段之间需保持一定的间隔， 这个间隔可以为不小 于所有频段信号中最宽频段信号的带宽。 所以削波速率最好为所有信号频段 信号带宽加频段之间间距的 3倍以上。  In the step A1, in order to make the signal PAR not rise after the signal is combined in the A4 step, when each frequency band signal in the A1 step is frequency-shifted, a certain interval needs to be maintained between the frequency bands, and the interval may be not less than all frequency band signals. The bandwidth of the widest band signal. Therefore, the clipping rate is preferably more than three times the signal bandwidth plus the spacing between the frequency bands of all signal bands.
以两路信号为例： 一路信号 X的带宽为 BW1，信号 Y的带宽为 BW2， 那么 需要满足：  Take two signals as an example: The bandwidth of one signal X is BW1, and the bandwidth of signal Y is BW2, then you need to meet:
fCFR≥3 ^ (BWl + BW2 + Space) f CFR ≥3 ^ (BWl + BW2 + Space)
公式中， 为合路削波逻辑器件的削波频率， Space为信号 X和信号 Y的 频-潘间隔。  In the formula, the clipping frequency of the combined clipping logic device, Space is the frequency-pan interval of the signal X and the signal Y.
为了尽可能的节省削波资源而不损失削波性能， 在合路削波前进行频谱 搬移时， 各频段信号的频谱之间间隔不宜过大， 也不宜过小。 过大会消耗更 多的逻辑资源， 过小则会影响合路后信号的 PAR， 同时也不利于低通滤波器 的设计 （信号间距小， 低通滤波器过渡带窄， 导致阶数增加， 会消耗更多的 逻辑资源）。 从大量仿真中发现： 频段间间隔不小于两个频段带宽之大者， 即 In order to save the clipping resources as much as possible without loss of clipping performance, the spectrum between the signals of each frequency band should not be too large or too small when the spectrum is moved before the combined clipping. Excessive consumption consumes more logic resources. If it is too small, it will affect the PAR of the combined signal. It is also not conducive to the design of the low-pass filter (the signal spacing is small, the low-pass filter transition band is narrow, resulting in an increase in the order, Consume more logical resources). It is found from a large number of simulations that the inter-band spacing is not less than the bandwidth of the two bands, that is,
Space > max(BW BW2) Space > max(BW BW2)
例如： 通过 DUC对信号的频谱搬移， 同样以上述两路信号为例： 信号 X 在频段 1 ; 信号 Y在频段 2;  For example: The spectrum of the signal is moved by DUC, and the above two signals are also taken as an example: signal X is in frequency band 1; signal Y is in frequency band 2;
那么可以将频段 1每个载波搬移至 Space/2+(nx _ 1/2)* BWC， 频段 2每个载 波搬移至 -Space/2-(ny-l/2)*BWc。 Then, each carrier of band 1 can be moved to Space/2+(n x _ 1/2)* BW C , and each carrier of band 2 is moved to -Space/2-(ny-l/2)*BW c .
其中： Space为两频段间距， BWC为载波频宽， nx c Nx , ny c Ny , Nx,Ny 每个频段信号内包含的载波数， 《x和 为相应载波的载波编号。 本发明实施例一提供的合路削波方法， 先将基带输出的两个或两个以上 频段的信号按照合路削波的要求进行频谱搬移， 以完成合路削波， 削波完成 后再进行移频合路， 以满足超宽带信号的要求。 通过两次频谱搬移既实现了 输出经过合路削波的超宽带信号， 降低了输出信号的 PAR， 提高了信号输出 质量， 又可以降低超宽带信号合路削波所需的逻辑资源。 对于实施例一的技术方案， 在合路削波后， 对分离后的信号重新进行频 谱搬移可以采取数字方式搬移或者模拟方式搬移， 下面通过实施例二和实施 例三分别进行描述。 实施例二 Where: Space is the two-band spacing, BW C is the carrier bandwidth, n x c N x , n y c N y , N x , N y the number of carriers contained in each frequency band signal, “ x and the carrier of the corresponding carrier Numbering. In the combined clipping method provided by the first embodiment of the present invention, the signals of two or more frequency bands outputted by the baseband are firstly moved according to the requirements of the combined clipping, to complete the combined clipping, and after the clipping is completed. Perform frequency shifting to meet the requirements of ultra-wideband signals. Through the two spectrum shifts, the UWB signal outputted by the combined clipping is realized, the PAR of the output signal is reduced, the signal output quality is improved, and the logic resources required for the UWB signal combining clipping are reduced. For the technical solution of the first embodiment, after the combined clipping, the spectral shift of the separated signal can be digitally moved or simulated. The following describes the second embodiment and the third embodiment separately. Embodiment 2
一种信号合路削波方法， 流程图如图 2所示， 包括：  A signal combining method for clipping, the flow chart is shown in Figure 2, including:
Bl、 对基带输出的两路或两路以上频段信号进行频谱搬移， 使得搬移后 的每个频段信号之间的频谱间隔和每个频段信号的频点满足合路削波的要 求； 可以理解的是， 基带输出的两路或两路以上信号为数字信号。  Bl. Perform spectrum shifting on the signals of two or more frequency bands of the baseband output, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signals of each frequency band satisfy the requirements of the combined clipping; Yes, two or more signals of the baseband output are digital signals.
B2、 对所述进行频谱搬移后的两路或两路以上频段信号进行合路削波； B2, performing combined path clipping on the two or more frequency band signals after the spectrum shifting;
B3、 将合路削波后输出的合路信号重新分离， 分离出每个频段信号；B3, re-separating the combined signal output after the combined clipping, and separating each frequency band signal;
B4、 将分离出的每个频段信号分别经过 DUC将频谱搬移至不同频点后合 路， 使合路后的每个频段信号之间的频谱间隔满足超宽带信号的要求。 B4. The separated signals of each frequency band are respectively moved to the different frequency points and combined by the DUC, so that the spectral interval between the signals of each frequency band after the combining meets the requirements of the ultra-wideband signal.
在步骤 B4后， 还可以包括：  After step B4, the method may further include:
B5 , 将经过 B4合路后的信号转换为模拟合路信号；  B5, converting the signal after the B4 combination into an analog combined signal;
B6, 对 B5步骤中获得的模拟合路信号进行频谱搬移， 使经过频谱搬移后 的模拟合路信号中每个频段信号的频点满足射频信号的要求。  B6, performing spectrum shifting on the analog combined signal obtained in step B5, so that the frequency of each frequency band signal in the analog combined signal after the spectrum shift satisfies the requirements of the radio frequency signal.
与实施例一不同的是， 信号在数字域实现了信号合路削波后分离再合路 的处理， 等同于在数字域完成超宽带信号的削波处理， 这样在 B5步骤中进行 数模转换 D AC ( Digital- Analog Converter ) 的数据已具有良好的 PAR。 这样， 经过 B6步骤输出的模拟合路信号， 在输入功率放大器前亦可获得相同 PA 的 信号， 以达到减小功放非线性失真的效果。  Different from the first embodiment, the signal is separated and recombined after the signal is combined in the digital domain, which is equivalent to the clipping processing of the ultra-wideband signal in the digital domain, so that the digital-to-analog conversion is performed in the step B5. The data of D AC (Digital- Analog Converter) has a good PAR. In this way, the analog combined signal outputted in step B6 can also obtain the same PA signal before the input power amplifier, so as to reduce the nonlinear distortion of the power amplifier.
实施例三  Embodiment 3
一种信号合路削波方法， 流程图如图 3所示， 包括：  A signal combining method for clipping, the flow chart is shown in Figure 3, including:
Cl、 对基带输出的两路或两路以上频段信号进行频谱搬移， 使得搬移后 的每个频段信号之间的频谱间隔和每个频段信号的频点满足合路削波的要 求；  Cl, spectrum shifting the signals of the two or more frequency bands of the baseband output, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signals of each frequency band satisfy the requirements of the combined clipping;
可以理解的是， 基带输出的两路或两路以上信号为数字信号。  It can be understood that two or more signals of the baseband output are digital signals.
C2、 对所述进行频谱搬移后的两路或两路以上频段信号进行合路削波； C3、 将合路削波后输出的合路信号重新分离， 分离出每个频段信号； C4、 将分离得到的每个频段信号进行数模转换后进行频谱搬移， 使经过 频谱搬移的每个频段信号的频点满足射频信号的要求和每个频段信号之间的 频谱间隔满足超宽带信号的要求； C2, performing combined path clipping on the two or more frequency band signals after the spectrum shifting; C3, re-separate the combined signal output after the combined clipping, and separate each frequency band signal; C4, perform digital-to-analog conversion of each separated frequency band signal, and then perform spectrum shifting, so that each frequency band after spectrum shifting The frequency of the signal satisfies the requirements of the radio frequency signal and the spectral spacing between the signals of each frequency band satisfies the requirements of the ultra-wideband signal;
其中， 频谱搬移可以采用单边带调制的方式。 具体的， 进行单边调制的 过程可以为： 通过调制器将分离后的每个频段信号转换为的模拟信号调制至 可以为其他方式， 并不影响本发明实施例的实现。  Among them, spectrum shifting can be performed by single sideband modulation. Specifically, the process of performing unilateral modulation may be: modulating the separated analog signal into signals by the modulator to other manners, and does not affect the implementation of the embodiment of the present invention.
C5、 将经过频谱搬移的每个频段信号进行合路。  C5. Combine the signals of each frequency band that has undergone spectrum shifting.
可以理解， 步骤 C5之后还可以包括： 将合路信号经过功率放大后输入天 线。 C4步骤中经过频谱搬移的每个频段信号的频点也可以不满足射频信号的 要求， 这样， C5步骤之后， 还可以对经过合路后的信号进行频谱搬移， 使经 过合路后的信号中的每个频段信号的频点满足射频信号的要求， 从而经过功 率放大后输入天线进行发射。  It can be understood that after step C5, the method further includes: converting the combined signal to the antenna after power amplification. The frequency of the signal of each frequency band after the spectrum shift in the step C4 may also not meet the requirements of the radio frequency signal, so that after the step C5, the spectrum of the combined signal may be moved, so that the signal after the combined signal is The frequency of each frequency band signal satisfies the requirements of the radio frequency signal, and then the power is amplified and then input to the antenna for transmission.
本发明实施例三， 通过对每个频段信号进行数模转换， 可以降低数模转 换所需的逻辑资源， 也即降低了超宽带信号合路削波所需的逻辑资源。  In the third embodiment of the present invention, by performing digital-to-analog conversion on each frequency band signal, the logic resources required for digital-to-analog conversion can be reduced, that is, the logic resources required for the ultra-wideband signal combining and clipping are reduced.
下面对本发明实施例提供的信号合路削波装置进行描述，为了便于说明， 仅示出了与本发明实施例相关的部分。 该削波装置可以在逻辑器件， 如现场 可编程门阵列 FPGA ( Field Programmable Gate Array )， 或集成电路， 如专用 集成电路 ASIC ( Application Specific Integrated Circuit ) 中实现； 本发明实施 例中的信号合路削波装置可以位于多频段基站中， 尤其可以位于多频段基站 的发信机中。  The signal combining and clipping device provided by the embodiment of the present invention will be described below. For the convenience of description, only parts related to the embodiment of the present invention are shown. The clipping device can be implemented in a logic device, such as a Field Programmable Gate Array (FPGA), or an integrated circuit, such as an Application Specific Integrated Circuit (ASIC); The clipping device can be located in a multi-band base station, in particular in a transmitter of a multi-band base station.
实施例四  Embodiment 4
一种信号合路削波装置， 结构示意图如图 4所示， 包括：  A signal combining path clipping device, the structure diagram is shown in Figure 4, including:
频谱搬移单元 410，用于对基带输出的两路或两路以上频段信号进行频谱 搬移， 使得搬移后的每个频段信号之间的频谱间隔和搬移后的每个频段信号 的频点满足合路削波的要求；  The spectrum shifting unit 410 is configured to perform spectrum shifting on two or more frequency band signals output by the baseband, so that the spectral interval between the signals after each shift and the frequency of each frequency band after the shifting meet the combined path Clipping requirements;
合路削波单元 420， 与所述频谱搬移单元 410相连， 对所述进行频谱搬移 后的两路或两路以上频段信号进行合路削波； 信号分离单元 430， 与合路削波单元相连， 将合路削波单元合路削波后输 出的合路信号重新分离， 分离出每个频段信号； The combining and clipping unit 420 is connected to the spectrum shifting unit 410, and performs combined clipping for the two or more frequency band signals after the spectrum shifting; The signal separation unit 430 is connected to the combined clipping unit, and re-separates the combined signal output after the combined clipping unit is combined and clipped, and separates each frequency band signal;
频谱搬移合路单元 440，用于对分离出的每个频段信号进行频谱搬移和合 路处理， 使得合路后的各频段信号之间频谱间隔满足超宽带信号要求。  The spectrum shifting and combining unit 440 is configured to perform spectrum shifting and combining processing on the separated signals of each frequency band, so that the spectral interval between the combined frequency band signals satisfies the ultra-wideband signal requirement.
所述频谱搬移合路单元 410可以为数字上变频器 DUC。本实施例中，信号 进行削波需要较高的信号采样频率， 还可以对基带输出的信号进行上采样， 上采样过程通常由滤波器和插值过程实现。  The spectrum shift combining unit 410 can be a digital up converter DUC. In this embodiment, the signal is clipped to require a higher signal sampling frequency, and the baseband output signal can also be upsampled. The upsampling process is usually performed by a filter and an interpolation process.
实施例五  Embodiment 5
一种信号合路削波装置， 结构示意图如图 4所示， 包括：  A signal combining path clipping device, the structure diagram is shown in Figure 4, including:
数字上变频器 510， 用于对基带输出的至少两个频段信号进行频谱搬移， 使得搬移后信号之间的频谱间隔和搬移后的每个频段信号的频点满足合路削 波的要求；  The digital up-converter 510 is configured to perform spectrum shifting on at least two frequency band signals of the baseband output, so that the spectral interval between the signals after the shifting and the frequency of the signal of each frequency band after the shifting meet the requirements of the combined clipping;
合路削波单元 520， 与所述数字上变频器 510相连， 对所述进行频谱搬移 后的至少两个频段信号进行合路削波；  The combining and clipping unit 520 is connected to the digital up-converter 510, and performs combined clipping on at least two frequency band signals after the spectrum shifting;
N路信号分离单元 530， 与合路削波单元相连， 每路信号分离单元对应于 一个频段信号， 将合路削波单元 520合路削波后输出的合路信号重新分离， 分 离出每个频段信号； 具体的， 每路信号分离单元 530可以包括：  The N-channel signal separation unit 530 is connected to the combined clipping unit, and each of the signal separation units corresponds to one frequency band signal, and the combined signal outputted by the combined clipping unit 520 is combined and separated, and each is separated. The frequency band signal; specifically, each signal separation unit 530 may include:
数字下变频 5301，用于按照经过合路削波单元 520合路削波后的信号中每 个频段信号的频点， 将每个频段信号搬移至零频； 应当理解的是， 该数字下 变频 DDC也可以由其他移频单元实现；  The digital down-conversion 5301 is used to move each frequency band signal to zero frequency according to the frequency point of each frequency band signal in the signal after the combined clipping unit 520 is combined; it should be understood that the digital down conversion The DDC can also be implemented by other frequency shifting units;
低通滤波器 5302， 用于对搬移至零频的每个频段信号进行滤波处理以完 成每个频段信号的分离。 由于每个频段信号已经搬移至零频， 所以可以采用 低通滤波器分别分离出每个频段信号，也可以用其他合适的滤波器进行实现。  The low pass filter 5302 is configured to filter each frequency band signal that is moved to zero frequency to complete the separation of the signals in each frequency band. Since each band signal has been moved to zero frequency, each band signal can be separated by a low-pass filter, or it can be implemented by other suitable filters.
频谱搬移合路单元 540，用于对分离出的每个频段信号进行频谱搬移和合 路处理， 使得各频段信号之间频谱间隔满足超宽带信号的要求；  The spectrum shifting and combining unit 540 is configured to perform spectrum shifting and combining processing on the separated signals of each frequency band, so that the spectrum spacing between the signals of each frequency band satisfies the requirements of the ultra-wideband signal;
频谱搬移合路单元 540可以在射频单元中用调制器进行对信号进行单边 带调制方式实现频谱搬移；  The spectrum shifting and combining unit 540 can perform spectrum shifting by using a modulator to perform single-sideband modulation on the signal in the radio frequency unit;
其中， 频谱搬移合路单元 540可以由模拟方式实现， 也可以由数字方式实 现。 采用模拟方式实现时， 频谱搬移合路单元 540， 如图 6所示， 可以包括： N路数模转换子单元 5401， 每路数模转换子单元 5401与一路信号分离单 元 530分离出的频段信号对应， 用于将信号分离单元 530分离后的每个频段信 号转换为模拟信号； The spectrum shift combining unit 540 can be implemented by an analog method or by a digital method. When implemented in an analog manner, the spectrum shifting unit 540, as shown in FIG. 6, may include: Each of the digital-to-analog conversion sub-units 5401 corresponds to a frequency band signal separated by a signal separation unit 530, and is configured to convert each frequency band signal separated by the signal separation unit 530 into an analog signal;
N路第一调制子单元 5402， 用于对经过数模转换子单元 5401转换得到的 模拟信号进行频谱搬移以使每个频段信号的频点满足射频信号的要求和每个 频段信号之间的频谱间隔满足超宽带信号的要求； 模拟合路子单元 5403，用于将 N路第一调制子单元 5402输出的 N路信号进 行合路， 以形成超宽带信号。  The N-channel first modulation sub-unit 5402 is configured to perform spectrum shifting on the analog signal converted by the digital-to-analog conversion sub-unit 5401 so that the frequency of each frequency band signal satisfies the requirements of the radio frequency signal and the spectrum between the signals of each frequency band. The interval meets the requirements of the ultra-wideband signal; the analog combining sub-unit 5403 is configured to combine the N signals output by the N first modulation sub-units 5402 to form an ultra-wideband signal.
其中， 经过 N路第一调制子单元 5402进行频谱搬移后的每个频段信号的 频点可以满足射频信号的要求， 这样， 从模拟合路子单元 5403输出的信号经 过功率放大后即可进行发射。 经过 N路第一调制子单元 5402进行频谱搬移的 每个频段信号的频点也可以不满足射频信号的要求， 这样， 还可以对从模拟 合路子单元 5403输出的信号进行频谱搬移， 使经过合路后的信号中的每个频 段信号的频点满足射频信号的要求，从而经过功率放大后输入天线进行发射。  The frequency of each frequency band signal after the spectrum shifting by the N first modulation subunit 5402 can meet the requirements of the radio frequency signal, so that the signal output from the analog combining subunit 5403 can be transmitted after being amplified by power. The frequency of each frequency band signal subjected to spectrum shifting by the N-channel first modulation sub-unit 5402 may not satisfy the requirements of the radio frequency signal, and thus the spectrum output from the analog combining sub-unit 5403 may be subjected to spectrum shifting. The frequency of each frequency band signal in the signal behind the road satisfies the requirements of the radio frequency signal, and then the power is amplified and input to the antenna for transmission.
采用数字方式实现时， 频谱搬移合路单元 540， 如图 7所示， 可以包括： When implemented in a digital manner, the spectrum shifting unit 540, as shown in FIG. 7, may include:
N路移频子单元 5404， 每路移频子单元 5404与一路信号分离单元 530分离 出的频段信号对应， 用于对每个频段信号进行频谱搬移， 使每个频段信号之 间的频谱间隔满足超宽带信号的要求， 在本实施例中可以是将每个频段信号 从零频搬移至不同的频点， 使每个频段信号之间的间隔满足超宽带信号的要 求； The N-channel frequency shifting sub-unit 5404, each frequency-shifting sub-unit 5404 corresponding to the frequency band signal separated by the one-way signal separating unit 530, is used for performing spectrum shifting on each frequency band signal, so that the spectral interval between the signals of each frequency band is satisfied. In the embodiment, the requirements of the ultra-wideband signal may be: moving each frequency band signal from a zero frequency to a different frequency point, so that the interval between the signals of each frequency band satisfies the requirements of the ultra-wideband signal;
其中， 移频子单元可以为 DUC;  Wherein, the frequency shifting subunit may be a DUC;
数字合路子单元 5405， 用于将 N路移频子单元 5404输出的经过移频的信 号进行合路。  The digital combining sub-unit 5405 is configured to combine the frequency-shifted signals output by the N-way frequency shifting sub-unit 5404.
频谱搬移合路单元 540还可以包括：  The spectrum shifting unit 540 can also include:
数模转换子单元 5406， 用于将经过数字合路子单元 5405合路后的信号进 行数模转换后送入第二调制子单元 5407；  The digital-to-analog conversion sub-unit 5406 is configured to perform digital-to-analog conversion of the signal after the digital combining sub-unit 5405 is combined into the second modulation sub-unit 5407;
第二调制子单元 5407， 用于将经过数模转换子单元 5406进行数模转换后 的合路后的信号进行频谱搬移， 使合路后的信号中的每个频段的频点满足射 频信号的要求。 The second modulation subunit 5407 is configured to perform spectrum shifting on the combined signal after the digital-to-analog conversion by the digital-to-analog conversion sub-unit 5406, so that the frequency of each frequency band in the combined signal satisfies the shot. Frequency signal requirements.
其中，数模转换子单元可以由射频数模转换器（ RFDAC， Radio Frequency Digital-Analog Converter ) 实现， 数模转换子单元和第二调制子单元也可以都 由 RFDAC实现， RFDAC是一种高速的数模转换器，可以具有较高的时钟采样 率， 可以实现在数字域将信号搬移至高频。  The digital-to-analog sub-unit can be implemented by a radio frequency digital-to-analog converter (RFDAC), and the digital-to-analog sub-unit and the second sub-module can also be implemented by an RFDAC, which is a high-speed The digital-to-analog converter can have a high clock sampling rate and can be used to move signals to high frequencies in the digital domain.
应当理解的是， 经过调制子单元移频后的信号可以经过功率放大器放大 后通过双工器进入天线发射， 其中， 第二调制子单元、 功率放大器、 双工器 可以统称为射频子单元。  It should be understood that the signal after frequency shifting by the modulation sub-unit can be amplified by the power amplifier and then transmitted to the antenna through the duplexer, wherein the second modulation sub-unit, the power amplifier, and the duplexer can be collectively referred to as a radio frequency sub-unit.
本发明实施例中信号合路削波装置可以运行的方法参照上述方法实施例 的描述， 此处不再赘述。  The method for the operation of the signal combining and clipping device in the embodiment of the present invention is described with reference to the description of the foregoing method embodiments, and details are not described herein again.
本发明实施例还提供一种基站， 包括如本发明实施例中所述的任意一种 信号合路削波装置。 该基站尤其可以为多频段基站。  An embodiment of the present invention further provides a base station, including any one of the signal combining and clipping devices according to the embodiment of the present invention. The base station can in particular be a multi-band base station.
以上对本发明实施例所提供的信号合路削波方法和装置进行了详细介 绍， 其中：  The signal combining method and apparatus provided by the embodiments of the present invention are described in detail above, wherein:
本发明实施例中将多个频段信号在频段间隔较小的情况下进行合路削 波， 从而可以降低合路削波的速率， 进而降低合路削波所需的逻辑资源， 并 在削波后将两个频段的频谱间隔拉开到满足超宽带的需求， 实现了信号在较 低的频率上进行合路削波， 降低了对削波处理的设备要求， 降低了信号输出 的 PAR。  In the embodiment of the present invention, a plurality of frequency band signals are combined and clipped in a case where the frequency band interval is small, thereby reducing the rate of combined clipping, thereby reducing the logic resources required for the combined clipping, and clipping After that, the spectrum interval of the two frequency bands is pulled apart to meet the requirement of ultra-wideband, and the signal is combined and clipped at a lower frequency, which reduces the requirements for the device for clipping processing and reduces the PAR of the signal output.
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成， 前述程序可以存储于一计算机可读取 存储介质中， 该程序在执行时， 执行包括上述方法实施例的步骤； 而前述的 存储介质包括： ROM, RAM,磁碟或者光盘等各种可以存储程序代码的介质。  A person skilled in the art can understand that all or part of the steps of implementing the foregoing method embodiments may be implemented by hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
此外， 本发明实施例的序号只是为了使实施例的描述更为清楚， 并不代 表本发明实施例的优劣次序。  In addition, the serial numbers of the embodiments of the present invention are only for the sake of clarity of the description of the embodiments, and do not represent the advantages and disadvantages of the embodiments of the present invention.
本发明实施例中提供的信号合路削波装置可以位于多频段基站中， 也可 以应用于其他对信号合路削波的场景。  The signal combining and clipping device provided in the embodiment of the present invention may be located in a multi-band base station, and may also be applied to other scenes where the signal is combined and clipped.
本发明实施例中的频谱搬移可以使用数字上变频 DUC或数字下变频 DDC实现， 也可以使用其他频谱搬移方式， 在本发明实施例中不予限定。 本发明实施例中的一些装置或模块的名称， 由于技术发展或应用场景的 不同， 可以会有相应变化， 但这并不影响本发明实施例的实现， 而这些变化 也应落入本发明的保护中。 本发明实施例中的一些模块或单元的划分仅标识 所实现的功能， 在物理上这些模块或单元可能进行合并或分割。 施例的说明只是用于帮助理解本发明的方法及其核心思想； 同时， 对于本领 域的一般技术人员， 依据本发明的思想， 在具体实施方式及应用范围上均会 有改变之处， 综上所述， 本说明书内容不应理解为对本发明的限制。 The spectrum shifting in the embodiment of the present invention may be implemented by using a digital up-conversion DUC or a digital down-conversion DDC, and other spectrum shifting modes may be used, which are not limited in the embodiment of the present invention. The names of some devices or modules in the embodiments of the present invention may be changed according to different technical developments or application scenarios, but this does not affect the implementation of the embodiments of the present invention, and these changes should also fall into the present invention. Protected. The partitioning of some modules or units in the embodiments of the present invention only identifies the functions implemented, and these modules or units may be physically combined or split. The description of the embodiment is only for helping to understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiment and application range, The description herein is not to be construed as limiting the invention.

Claims

权利 要 求 Rights request
1、 一种削波方法， 其特征在于， 包括： A clipping method, characterized in that it comprises:
对基带输出的至少两个频段信号进行频谱搬移， 使得搬移后的每个频段 信号之间的频谱间隔和每个频段信号的频点满足合路削波的要求；  Performing spectrum shifting on at least two frequency band signals output by the baseband, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signals of each frequency band satisfy the requirements of the combined clipping;
对频谱搬移后的至少两个频段信号进行合路削波；  Performing combined clipping on at least two frequency band signals after spectrum shifting;
将合路削波后输出的合路信号进行分离， 分离出每个频段信号， 并对分 离出的每个频段信号进行频谱搬移和合路， 使得经过频谱搬移和合路的每个 频段信号之间的频谱间隔满足超宽带信号的要求。  Separating the combined signals outputted by the combined clipping, separating the signals of each frequency band, and performing spectrum shifting and combining on each of the separated signals, so that the signals are transmitted between each frequency band after the spectrum shifting and combining The spectral spacing meets the requirements of ultra-wideband signals.
2、 如权利要求 1所述的方法， 其特征在于， 所述对分离出的每个频段信 号进行频谱搬移和合路包括：  2. The method according to claim 1, wherein the performing spectrum shifting and combining on each of the separated frequency band signals comprises:
对分离出的每个频段信号进行频谱搬移后合路， 使合路后的每个频段信 号之间的频谱间隔满足超宽带信号的要求。  The separated signals of each frequency band are spectrally shifted and combined, so that the spectral interval between each frequency band signal after the combining meets the requirements of the ultra-wideband signal.
3、 如权利要求 1或 2所述的方法， 其特征在于， 在对分离出的每个频段信 号进行频谱搬移和合路后， 还包括：  The method according to claim 1 or 2, wherein after performing spectrum shifting and combining on each of the separated frequency band signals, the method further comprises:
将经过频谱搬移和合路得到的信号经过数模转换转换为模拟合路信号； 对所述模拟合路信号进行频谱搬移， 使经过频谱搬移后的模拟合路信号 中的每个频段信号的频点满足射频信号的要求。  The signal obtained by the spectrum shifting and combining is converted into an analog combining signal by digital-to-analog conversion; the frequency shifting of the analog combining signal is performed, so that the frequency of each frequency band signal in the analog combined signal after the spectrum shifting is performed Meet the requirements of RF signals.
4、 如权利要求 1所述的方法， 其特征在于， 所述对分离出的每个频段信 号进行频谱搬移和合路包括：  4. The method according to claim 1, wherein the performing spectrum shifting and combining on each of the separated frequency band signals comprises:
将分离出的每个频段信号进行数模转换后进行频谱搬移， 使经过频谱搬 移的每个频段信号的频点满足射频信号的要求和每个频段信号之间的频谱间 隔满足超宽带信号的要求；  The separated signals of each frequency band are digital-analog converted and then the spectrum is shifted, so that the frequency of each frequency band signal after spectrum shifting satisfies the requirements of the radio frequency signal and the spectral interval between the signals of each frequency band satisfies the requirements of the ultra-wideband signal. ;
将经过频谱搬移的每个频段信号进行合路。  Combine each band signal that has been spectrally shifted.
5、 如权利要求 1-4任意一项所述的方法， 其特征在于， 将合路削波后输 出的合路信号进行分离， 分离出每个频段信号包括：  The method according to any one of claims 1 to 4, characterized in that the combined signals outputted after the combined clipping are separated, and the signals for each frequency band are separated:
对合路削波输出的合路的信号进行频谱搬移；  Performing spectrum shifting on the combined signal of the combined clipping output;
通过低通滤波器对经过频谱搬移的合路信号进行滤波， 获得每个频段信 号； 对合路削波输出的合路的信号进行频谱搬移包括： 按照每个频段信号的 频点， 将经过合路削波的每个频段信号分别搬移至零频。 Filtering the combined signal that has undergone spectrum shifting through a low-pass filter to obtain a signal for each frequency band; The spectral shifting of the combined signal of the combined clipping output includes: moving each frequency band signal subjected to the combined clipping to a zero frequency according to the frequency of each frequency band signal.
6、 如权利要求 1-5任意一项所述的方法， 其特征在于， 搬移后的每个频 段信号之间的频谱间隔满足合路削波的要求包括： 每个频段信号之间的频谱 间隔不小于所有频段信号的带宽中的最大值。  The method according to any one of claims 1 to 5, characterized in that the spectral interval between the signals of each frequency band after the movement meets the requirements of the combined clipping includes: the spectral interval between the signals of each frequency band Not less than the maximum of the bandwidth of all band signals.
7、 如权利要求 1-6任意一项所述的方法， 其特征在于， 搬移后的每个频 段信号的频点满足合路削波的要求包括： 每个频段信号的频点不高于合路削 波的逻辑时钟频率。  The method according to any one of claims 1 to 6, wherein the frequency of the signal of each frequency band after the movement meets the requirements of the combined clipping includes: the frequency of each frequency band signal is not higher than The logical clock frequency of the road clipping.
8、 一种削波装置， 其特征在于， 包括：  8. A clipping device, comprising:
频谱搬移单元， 用于对基带输出的至少两个频段信号进行频谱搬移， 使 得搬移后的每个频段信号之间的频谱间隔和每个频段信号的频点满足合路削 波的要求；  The spectrum shifting unit is configured to perform spectrum shifting on at least two frequency band signals output by the baseband, so that the spectral interval between the signals of each frequency band after the shift and the frequency of the signal of each frequency band satisfy the requirements of the combined clipping;
合路削波单元， 与所述频谱搬移单元相连， 用于对经过频谱搬移后的频 段信号进行合路削波；  a combined clipping unit connected to the spectrum shifting unit for combining and clipping the frequency band signals after the spectrum shifting;
信号分离单元， 与所述合路削波单元相连， 用于将合路削波单元合路削 波后输出的合路信号进行分离， 分离出每个频段信号；  a signal separation unit, which is connected to the combined clipping unit, and is configured to separate the combined signal output after the combined clipping unit is combined and split, and separate each frequency band signal;
频谱搬移合路单元，用于对分离出的每个频段信号进行频谱搬移和合路， 使得经过频谱搬移和合路后的每个频段信号之间的频谱间隔满足超宽带信号 的要求。  The spectrum shifting and combining unit is configured to perform spectrum shifting and combining on each of the separated signals, so that the spectral interval between each frequency band signal after spectrum shifting and combining meets the requirements of the ultra-wideband signal.
9、 如权利要求 8所述的装置， 其特征在于， 所述频谱搬移单元为数字上 变频器（DUC )。  9. The apparatus according to claim 8, wherein the spectrum shifting unit is a digital up converter (DUC).
10、 如权利要求 8或 9所述的装置， 其特征在于， 所述信号分离单元包括： 移频子单元， 用于对合路削波输出的合路的信号进行频谱搬移， 所述频 谱搬移包括： 按照每个频段信号的频点， 将经过合路削波的每个频段信号分 别搬移至零频；  The apparatus according to claim 8 or 9, wherein the signal separating unit comprises: a frequency shifting subunit, configured to perform spectrum shifting on a combined signal of the combined clipping output, the spectrum shifting The method includes: moving each frequency band signal that has been combined and clipped to a zero frequency according to a frequency point of each frequency band signal;
低通滤波器， 用于对经过频谱搬移的合路信号进行滤波以获得每个频段 信号。  A low pass filter for filtering the combined signal that has undergone spectral shifting to obtain a signal for each band.
11、 如权利要求 8-10任意一项所述的装置， 其特征在于， 所述频谱搬移 合路单元包括： N路数模转换子单元， 用于将信号分离单元分离后的每个频段信号转换 为模拟信号； The apparatus according to any one of claims 8 to 10, wherein the spectrum shifting and combining unit comprises: The N-channel digital-to-analog conversion sub-unit is configured to convert each frequency band signal separated by the signal separation unit into an analog signal;
N路第一调制子单元， 用于对经过所述数模转换子单元转换得到的模拟 信号进行频谱搬移， 使每个频段信号的频点满足射频信号的要求和每个频段 信号之间的频谱间隔满足超宽带信号；  The N-channel first modulation sub-unit is configured to perform spectrum shifting on the analog signal converted by the digital-to-analog conversion sub-unit, so that the frequency of each frequency band signal satisfies the requirements of the radio frequency signal and the spectrum between the signals of each frequency band The interval satisfies the ultra-wideband signal;
模拟合路子单元，用于将 N路第一调制子单元输出的 N路经过频谱搬移的 信号进行合路。  The analog combining subunit is configured to combine the signals of the N channels outputted by the N first modulation subunits through the spectrum shifting.
12、 如权利要求 8-10任意一项所述的装置， 其特征在于， 所述频谱搬移 合路单元包括：  12. The apparatus according to any one of claims 8 to 10, wherein the spectrum shifting unit comprises:
N路移频子单元， 用于对每个频段信号进行频谱搬移， 使每个频段信号 之间的频谱间隔满足超宽带信号的要求； 号进行合路。  The N-channel frequency shifting sub-unit is configured to perform spectrum shifting on each frequency band signal, so that the spectral interval between the signals of each frequency band satisfies the requirements of the ultra-wideband signal;
13、 如权利要求 12所述的装置， 其特征在于， 所述频谱搬移合路单元还 包括：  The apparatus according to claim 12, wherein the spectrum shifting and combining unit further comprises:
数模转换子单元， 用于将经过所述数字合路子单元合路后的信号进行数 模转换获得模拟合路信号， 将所述模拟合路信号输入第二调制子单元；  a digital-to-analog conversion sub-unit, configured to perform digital-to-analog conversion of signals after combining the digital combining sub-units to obtain an analog combining signal, and input the analog combining signal into the second modulation sub-unit;
第二调制子单元， 用于将所述模拟合路信号进行频谱搬移， 使经过频谱 搬移后的模拟合路信号中的每个频段的频点满足射频信号的要求。  The second modulation sub-unit is configured to perform spectrum shifting on the analog combination signal, so that a frequency point of each frequency band in the analog combination signal after the spectrum is moved satisfies a requirement of the radio frequency signal.
14、 一种基站， 其特征在于， 包括如权利要求 8至 13任意一项所述的 信号合路削波装置。  A base station, comprising the signal combining path clipping device according to any one of claims 8 to 13.
15、 如权利要求 14所述的基站， 其特征在于， 所述基站为多频段基站。  The base station according to claim 14, wherein the base station is a multi-band base station.
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