CN102546498A - Method and device for obtaining signals with low peak-to-average power ratio based on error vector magnitude - Google Patents
Method and device for obtaining signals with low peak-to-average power ratio based on error vector magnitude Download PDFInfo
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- CN102546498A CN102546498A CN2010106008969A CN201010600896A CN102546498A CN 102546498 A CN102546498 A CN 102546498A CN 2010106008969 A CN2010106008969 A CN 2010106008969A CN 201010600896 A CN201010600896 A CN 201010600896A CN 102546498 A CN102546498 A CN 102546498A
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Abstract
The invention aims at providing a method and a device for obtaining signals with low peak-to-average power ratio based on error vector magnitude. The radio remote unit receives one channel or multi-channel carrier signals. An adjustment factor of the one-channel or multi-channel carrier signals is obtained according to expected error vector magnitude of the one-channel or multi-channel carrier signals. Peak compensation signals of the channel or multi-channel carrier signals are generated according to the adjustment factor. Peak compensation processing is conducted according to the peak compensation signals so as to obtain the signals with low peak-to-average power ratio. Compared with the prior art, the adjustment factor is adjusted based on the error vector magnitude, the signals with low peak-to-average power ratio are obtained, requirements of expected error vector magnitude (EVM) and peak-to-average power ratio (PAPR) are met, and furthermore, index requirements of adjacent channel leakage power ratio (ACLR) are met.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of technology that in radio frequency remote equipment, is used for obtaining the equal power ratio signal of ebb based on Error Vector Magnitude adjustment.
Background technology
Radio frequency zooms out that (Radio Remote Head is baseband signal to be changed into light signal transmit RRH), and a kind of technology of amplifying at far-end can be divided into radio base band control (RadioServer) and radio frequency zooms out two parts with the base station.Use the RRH technology, can be flexibly, effectively according to varying environment, make up star, tree-like, chain, annular isostructure diverse network.For example, this technology can be used to expand the capacity in crowded zones such as shopping center, airport, station, and improves the covering quality that signals such as enterprise headquarters, office building or underground parking are difficult to arrive the zone.
In the radio frequency remote technology, carrier signal has the requirement of peak-to-average power ratio (PAPR) or crest factor, and this has brought very big restriction for the work of power amplifier.In order to handle peak power, it will be from the most effective working point rollback.In order to increase spectrum efficiency; Before the transmission signal carries out power amplifier; Can use crest factor to reduce the peak-to-average power ratio (PAPR) that (CFR) algorithm reduces signal, power amplifier can be worked in the most effective working point as much as possible, thereby improve the spectrum efficiency of system.
Present various peak value cancellation techniques all only are applied in the situation of carrier wave transmitted power continuous dispensing, through deducting the pulse signal of spectrum moulding, reduce the peak-to-average power ratio (PAPR) of signal with this.When intercarrier is the situation that non-balanced power distributes; Because the discontinuous distribution of transmitting power of carrier wave; The carrier wave of high transmit power has high received signal to noise ratio (SNR) and low Error Vector Magnitude (Error Vector Measurement; EVM), and the carrier wave of low transmitting power will bring high Error Vector Magnitude (EVM), and can't satisfy the requirement of system.
Therefore, how in radio frequency remote equipment, the carrier signal of the discontinuous distribution of transmitting power to be handled,, become a problem of needing solution badly to obtain the equal power ratio signal of ebb.
Summary of the invention
The purpose of this invention is to provide a kind of method and apparatus that in radio frequency remote equipment, is used for obtaining the equal power ratio signal of ebb based on Error Vector Magnitude adjustment.
According to an aspect of the present invention, a kind of method that in radio frequency remote equipment, is used for obtaining based on Error Vector Magnitude adjustment the equal power ratio signal of ebb is provided, wherein, this method may further comprise the steps:
A receives one or more carrier signal;
B obtains the regulatory factor of said one or more carrier signal according to the anticipation error amplitude of the vector of said one or more carrier signal;
C is according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal;
D offsets signal according to said peak value, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb.
According to a further aspect in the invention, a kind of radio frequency remote equipment that is used for obtaining based on Error Vector Magnitude adjustment the equal power ratio signal of ebb is provided also, wherein, this equipment comprises:
Receiving system is used to receive one or more carrier signal;
Deriving means is used for the anticipation error amplitude of the vector according to said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal;
Generating apparatus is used for according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal;
Offset device, be used for offseting signal, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb according to said peak value.
Compared with prior art; The present invention is through adjusting regulatory factor based on Error Vector Magnitude; Obtain the equal power ratio signal of ebb; Realized the Error Vector Magnitude (EVM) and peak-to-average power ratio (PAPR) requirement of expectation, further, also satisfied the index request of adjacent channel leakage power than (ACLR).
Description of drawings
Through reading the detailed description of doing with reference to following accompanying drawing that non-limiting example is done, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 goes out the equipment sketch map that obtains the equal power ratio signal of ebb according to the adjustment based on Error Vector Magnitude of one aspect of the invention;
Fig. 2 go out according to a further aspect of the present invention obtain the method flow diagram of the equal power ratio signal of ebb based on Error Vector Magnitude adjustment.
Same or analogous Reference numeral is represented same or analogous parts in the accompanying drawing.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 goes out the equipment sketch map that obtains the equal power ratio signal of ebb according to the adjustment based on Error Vector Magnitude of one aspect of the invention.Wherein, radio frequency remote equipment 1 comprises receiving system 11, deriving means 12, generating apparatus 13 and offsets device 14.
Wherein, receiving system 11 is used to receive one or more carrier signal.Particularly; Receiving system 11 receives one or more carrier signal; Said carrier signal includes but not limited to any carrier signal in WCDMA system, CDMA2000 system, TD-SCDMA system, LTE system, for example based on high peak-to-average power ratio (PAPR) signal of modulation schemes such as QPSK, 64QAM or 16QAM etc.For example, in radio frequency remote equipment 1, the receiving system 11 on it receives the equal power ratio signal in peak in the WCDMA system.Those skilled in the art will be understood that the modulation scheme of above-mentioned communication system and carrier signal is merely for example; The modulation scheme of other communication systems existing or that possibly occur from now on or carrier signal is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Deriving means 12 is used for the anticipation error amplitude of the vector according to said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal.Particularly, the anticipation error amplitude of the vector of one or more carrier signal that deriving means 12 is received according to receiving system 11, for example the desired Error Vector Magnitude of different modulation modes is different, obtains the regulatory factor of said one or more carrier signal.At this, Error Vector Magnitude (EVM) characterizes the square root of error vector average power and the ratio of the average power of reference signal.Error Vector Magnitude generally is used for assessing the modulation quality that transmitter transmits, avoided characterizing the transmission radiofrequency signal with a plurality of parameters, and in the development and Design process indicating device of an of great value whole signal quality.Preferably, said deriving means 12 can also be according to the anticipation error amplitude of the vector of said one or more carrier signal, and combines the carrier wave relevant information of said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal.Connect precedent; In radio frequency remote equipment 1; Receiving system 11 on it receives the equal power ratio signal in peak in the WCDMA system; Deriving means 12 is according to the anticipation error amplitude of the vector of the equal power ratio signal in said peak, and for example wherein one tunnel carrier signal adopts QPSK (QPSK) modulation system, and its anticipation error amplitude of the vector requires less than 17.5%; And combine the signal power of the equal power ratio signal in said peak, amplitude, phase place and the positional information etc. of peak signal, obtain the regulatory factor of this road carrier signal; And for example another road carrier signal adopts the 16QAM modulation system; Its anticipation error amplitude of the vector requires less than 12.5%; And combine the signal power of the equal power ratio signal in said peak, amplitude, phase place and the positional information etc. of peak signal, obtain the regulatory factor of said another road carrier signal.Those skilled in the art will be understood that the above-mentioned mode of obtaining the regulatory factor of said one or more carrier signal is merely for example; The mode of other existing or regulatory factors that obtain said one or more carrier signal that possibly occur from now on is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Generating apparatus 13 is used for according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal.Particularly, the regulatory factor that generating apparatus 13 is obtained according to deriving means 12, through modes such as Signal Regulation, signal stacks, the peak value that generates said one or more carrier signal offsets signal.Connect precedent, the deriving means 12 of radio frequency remote equipment 1 gets access to the regulatory factor of the equal power ratio signal in said peak that said radio frequency remote equipment 1 received; Subsequently, generating apparatus 13 is modulated the equal power ratio signal in said peak according to said regulatory factor, and the peak value that generates the equal power ratio signal in said peak offsets signal.Preferably; Said radio frequency remote equipment 1 can also resolve into the multichannel carrier signal with the equal power ratio signal in said peak that receives; Through the register configuration threshold value, detect the carrier signal that amplitude surpasses the peak clipping thresholding, then the said carrier signal that surpasses the peak clipping thresholding is distributed to different clock pulse generators; Said generating apparatus 13 is according to regulatory factor; The said carrier signal that surpasses the peak clipping thresholding is regulated, and through adder, the peak value that generates the equal power ratio signal in said peak offsets signal again.Those skilled in the art will be understood that the mode that the peak value of said one or more carrier signal of above-mentioned generation offsets signal is merely for example; The mode that the peak value of said one or more carrier signal of other generations existing or that possibly occur from now on offsets signal is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Preferably, be constant work between each device of radio frequency remote equipment 1.Particularly, receiving system 11 receives one or more carrier signal; Deriving means 12 obtains the regulatory factor of said one or more carrier signal according to the anticipation error amplitude of the vector of said one or more carrier signal; Generating apparatus 13 is according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal; Offset device 14 and offset signal, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb according to said peak value.At this; It will be understood by those skilled in the art that " continuing " is meant that each device requires to carry out obtaining of the obtaining of reception, regulatory factor of carrier signal, generation that peak value offsets signal and the equal power ratio signal of ebb according to mode of operation that set or adjustment in real time respectively, stops the reception carrier signal in a long time until receiving system 11.
Preferably, said radio frequency remote equipment 1 can also comprise the filter (not shown).Said filter is used for according to preset spectrum radiation template the equal power ratio signal of said ebb being carried out Filtering Processing, to obtain the filtering signal of low adjacent channel leakage power ratio.At this, said spectrum radiation template be meant appointment (band like 0.8MHz～4MHz) is launched restriction outward, makes the outer emission of band of base station can not cause undue disturbance to other business of adjacent channel with the certain bandwidth of useful signal allocated channel frequency departure.Said Adjacent Channel Leakage Power Ratio (AdjacentChannel Leakage power Ratio) refers to that transmitting power falls the ratio of adjacent channel power with it, and the introducing of Adjacent Channel Leakage Power Ratio index is to hope interference is not caused in other base stations that are operated in its adjacent carrier in the same system.Concrete; Offseting the equal power ratio signal of ebb that device 14 obtained possibly exist beyond channel width because the radiation that the non-linear signal of not expecting that produces (not comprising spurious signal) of modulation diffusion and transmitter forms outside channel width; Therefore, filter carries out Filtering Processing according to preset spectrum radiation template to the equal power ratio signal of said ebb; Filter out out-of-band radiation, to obtain the filtering signal of low adjacent channel leakage power ratio.Those skilled in the art will be understood that the above-mentioned mode of obtaining the filtering signal of low adjacent channel leakage power ratio is merely for example; The mode of other existing or filtering signals that obtain low adjacent channel leakage power ratio that possibly occur from now on is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Preferably, said preset spectrum radiation template is based on 3GPP TS 25.104 or 3GPP TS25.141 standard.Concrete; Filter is according to the preset spectrum radiation template based on 3GPP TS 25.104 or 3GPP TS25.141 standard; The equal power ratio signal of said ebb is carried out Filtering Processing, filter out out-of-band radiation, to obtain the filtering signal of low adjacent channel leakage power ratio.Those skilled in the art will be understood that above-mentioned standard is merely for example, and other standards existing or that possibly occur from now on also should be included in the protection range of the present invention, and be contained in this at this with way of reference as applicable to the present invention.
Preferably, said deriving means 12 also is used for the anticipation error amplitude of the vector according to said one or more carrier signal, and combines the carrier wave relevant information of said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal.Particularly; The anticipation error amplitude of the vector of said one or more carrier signal that deriving means 12 is received according to receiving system 11; And combine the carrier wave relevant information of said one or more carrier signal, obtain the regulatory factor of said one or more carrier signal.At this, said carrier wave relevant information can be that radio frequency remote equipment 1 independently obtains, and also can be the carrier wave relevant information of said one or more carrier signal of obtaining of other product or third party devices.For example; The QPSK modulation system requires Error Vector Magnitude less than 17.5%; 16QAM (quaternary quadrature amplitude modulation) mode requires Error Vector Magnitude less than 12.5%; 64QAM (octal system quadrature amplitude modulation) mode requires Error Vector Magnitude less than 8% etc.; The anticipation error amplitude of the vector of said one or more carrier signal that deriving means 12 is received according to receiving system 11, and combine the desired Error Vector Magnitude of different modulation schemes, obtain the regulatory factor of said one or more carrier signal.Those skilled in the art will be understood that the above-mentioned mode of obtaining the regulatory factor of said one or more carrier signal is merely for example; The mode of other existing or regulatory factors that obtain said one or more carrier signal that possibly occur from now on is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
More preferably, said carrier wave relevant information include but not limited to following at least each:
The realtime power of-said one or more carrier signal;
The power ratio of-said one or more carrier signal;
The historical record of the regulatory factor of-said one or more carrier signal;
The modulation scheme of-said one or more carrier signal.
Particularly; The anticipation error amplitude of the vector of said one or more carrier signal that deriving means 12 is received according to receiving system 11; And combine historical record, modulation scheme of realtime power, power ratio, the regulatory factor of said one or more carrier signal etc., obtain the regulatory factor of said one or more carrier signal.For example; Owing to be the different noise power of each allocation of carriers; The carrier wave that is high transmit power will distribute high noise power, and the low noise power of allocation of carriers of low transmitting power makes that the received signal to noise ratio (SNR) of each carrier wave is all the same with Error Vector Magnitude (EVM).Again because received signal to noise ratio is relevant with the realtime power of said one or more carrier signal; Therefore; The anticipation error amplitude of the vector of said one or more carrier signal that deriving means 12 is received according to receiving system 11; And combine the realtime power of said one or more carrier signal, can obtain the regulatory factor of said one or more carrier signal.And for example; When having multichannel carrier; Deriving means 12 can be according to the power ratio of the signal of said multichannel carrier; Obtain the regulatory factor of said multichannel carrier signal; For example the power ratio for four tunnel carrier signals is 8: 42: 8: 42, and then the pairing regulatory factor of this four tunnel carrier signal is respectively
for another example, to identical carrier signal; Deriving means 12 can directly obtain its regulatory factor according to the historical record of the regulatory factor of said carrier signal.The historical record of the regulatory factor of said carrier signal can be stored in said radio frequency remote equipment end through the mode of database.The anticipation error amplitude of the vector of said one or more carrier signal that deriving means 12 can also be received according to receiving system 11, and combine the modulation scheme of said one or more carrier signal, obtain the regulatory factor of said one or more carrier signal.For example; The QPSK modulation system requires Error Vector Magnitude less than 17.5%; 16QAM (quaternary quadrature amplitude modulation) mode requires Error Vector Magnitude less than 12.5%; 64QAM (octal system quadrature amplitude modulation) mode requires Error Vector Magnitude less than 8% etc., and deriving means 12 obtains the regulatory factor of said one or more carrier signal according to the desired Error Vector Magnitude of different modulation schemes.Those skilled in the art will be understood that above-mentioned carrier wave relevant information is merely for example, and other carrier wave relevant informations existing or that possibly occur from now on also should be included in the protection range of the present invention, and be contained in this at this with way of reference as applicable to the present invention.
Preferably, said peak value offsets to handle to operate and comprises:
-said one or more carrier signal is postponed to handle, to obtain the carrier signal after the delay;
-that the carrier signal after the said delay and reverse said peak value are offseted signal is superimposed, to obtain the equal power ratio signal of said ebb.
Particularly, the said device 14 of offseting postpones to handle to said one or more carrier signal through mode such as relay service time, to obtain the carrier signal after the delay; Then, saidly offset peak value that device 14 generated generating apparatus 13 again and offset signal and carry out oppositely, it is superimposed that the carrier signal after the said delay and reverse said peak value are offseted signal, to obtain the equal power ratio signal of ebb.For example, in radio frequency remote equipment 1, the receiving system 11 on it receives the equal power ratio signal in peak in the WCDMA system; Deriving means 12 is according to the anticipation error amplitude of the vector of the equal power ratio signal in said peak; For example adopt the anticipation error amplitude of the vector of QPSK (QPSK) modulation system to require less than 17.5%; And combine the signal power of the equal power ratio signal in said peak, amplitude, phase place and the positional information etc. of peak signal, obtain the regulatory factor of the equal power ratio signal in said peak; Then, generating apparatus 13 is modulated the equal power ratio signal in peak that said radio frequency remote equipment 1 is received according to regulatory factor, and the peak value that generates the equal power ratio signal in said peak offsets signal; Subsequently, offset device 14 and earlier the equal power ratio signal in said peak is postponed to handle, to obtain the carrier signal after the delay, it is superimposed again the carrier signal after the said delay and reverse said peak value to be offseted signal, to obtain the equal power ratio signal of said ebb.Those skilled in the art will be understood that the above-mentioned mode of obtaining the equal power ratio signal of said ebb is merely for example; Other existing or modes of obtaining the equal power ratio signal of said ebb that possibly occur from now on are as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Fig. 2 go out according to a further aspect of the present invention obtain the method flow diagram of the equal power ratio signal of ebb based on Error Vector Magnitude adjustment.
Wherein, in step S1, radio frequency remote equipment 1 receives one or more carrier signal.Particularly; In step S1; Radio frequency remote equipment 1 receives one or more carrier signal; Said carrier signal includes but not limited to any carrier signal in WCDMA system, CDMA2000 system, TD-SCDMA system, LTE system, for example based on high peak-to-average power ratio (PAPR) signal of modulation schemes such as QPSK, 64QAM or 16QAM etc.For example, in radio frequency remote equipment 1, it receives the equal power ratio signal in peak in the WCDMA system in step S1.Those skilled in the art will be understood that the modulation scheme of above-mentioned communication system and carrier signal is merely for example; The modulation scheme of other communication systems existing or that possibly occur from now on or carrier signal is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
In step S2, radio frequency remote equipment 1 obtains the regulatory factor of said one or more carrier signal according to the anticipation error amplitude of the vector of said one or more carrier signal.Particularly; In step S2; Radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of one or more carrier signal that in step S1, is received, and for example the desired Error Vector Magnitude of different modulation modes is different, obtains the regulatory factor of said one or more carrier signal.At this, Error Vector Magnitude (EVM) characterizes the square root of error vector average power and the ratio of the average power of reference signal.Error Vector Magnitude generally is used for assessing the modulation quality that transmitter transmits, avoided characterizing the transmission radiofrequency signal with a plurality of parameters, and in the development and Design process indicating device of an of great value whole signal quality.Preferably; In step S2; Radio frequency remote equipment 1 can also be according to the anticipation error amplitude of the vector of said one or more carrier signal, and combines the carrier wave relevant information of said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal.Connect precedent, in radio frequency remote equipment 1, it receives the equal power ratio signal in peak in the WCDMA system in step S1; In step S2; This radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of the equal power ratio signal in said peak; For example wherein one tunnel carrier signal adopts QPSK (QPSK) modulation system; Its anticipation error amplitude of the vector requires less than 17.5%, and combines the signal power of the equal power ratio signal in said peak, amplitude, phase place and the positional information etc. of peak signal, obtains the regulatory factor of this road carrier signal; And for example another road carrier signal adopts the 16QAM modulation system; Its anticipation error amplitude of the vector requires less than 12.5%; And combine the signal power of the equal power ratio signal in said peak, amplitude, phase place and the positional information etc. of peak signal, obtain the regulatory factor of said another road carrier signal.Those skilled in the art will be understood that the above-mentioned mode of obtaining the regulatory factor of said one or more carrier signal is merely for example; The mode of other existing or regulatory factors that obtain said one or more carrier signal that possibly occur from now on is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
In step S3, radio frequency remote equipment 1 is according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal.Particularly, in step S3, radio frequency remote equipment 1 is according to the regulatory factor that in step S2, is obtained, and through modes such as Signal Regulation, signal stacks, the peak value that generates said one or more carrier signal offsets signal.Connect precedent, radio frequency remote equipment 1 gets access to the regulatory factor of the equal power ratio signal in said peak that said radio frequency remote equipment 1 received in step S2; Subsequently, in step S3, this radio frequency remote equipment 1 is modulated the equal power ratio signal in said peak according to said regulatory factor, and the peak value that generates the equal power ratio signal in said peak offsets signal.Preferably; Said radio frequency remote equipment 1 can also resolve into the multichannel carrier signal with the equal power ratio signal in said peak that receives, and through the register configuration threshold value, detects the carrier signal that amplitude surpasses the peak clipping thresholding; Then the said carrier signal that surpasses the peak clipping thresholding is distributed to different clock pulse generators; In step S3, this radio frequency remote equipment 1 is regulated the said carrier signal that surpasses the peak clipping thresholding according to regulatory factor; Through adder, the peak value that generates the equal power ratio signal in said peak offsets signal again.Those skilled in the art will be understood that the mode that the peak value of said one or more carrier signal of above-mentioned generation offsets signal is merely for example; The mode that the peak value of said one or more carrier signal of other generations existing or that possibly occur from now on offsets signal is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
In step S4, radio frequency remote equipment 1 offsets signal according to said peak value, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb.Particularly; In step S4; Radio frequency remote equipment 1 offsets signal according to the peak value that in step S3, is generated; Said one or more carrier signal is carried out peak value offset processing, for example offset the superimposed mode of signal, to obtain the equal power ratio signal of said ebb through carrier signal after will postponing and reverse said peak value.Connect precedent, radio frequency remote equipment 1 according to regulatory factor, is regulated the equal power ratio signal in peak that said radio frequency remote equipment 1 is received in step S3, and the peak value that generates the equal power ratio signal in said peak offsets signal; Subsequently, in step S4, radio frequency remote equipment 1 postpones to handle to the equal power ratio signal in said peak earlier, to obtain the carrier signal after the delay; It is superimposed then again the carrier signal after the said delay and reverse said peak value to be offseted signal, to obtain the equal power ratio signal of said ebb.Those skilled in the art will be understood that the above-mentioned mode of obtaining the equal power ratio signal of ebb is merely for example; Other existing or modes of obtaining the equal power ratio signal of ebb that possibly occur from now on are as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Preferably, between above-mentioned each step be constant work.Particularly, in step S1, radio frequency remote equipment 1 receives one or more carrier signal; In step S2, radio frequency remote equipment 1 obtains the regulatory factor of said one or more carrier signal according to the anticipation error amplitude of the vector of said one or more carrier signal; In step S3, radio frequency remote equipment 1 is according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal; In step S4, radio frequency remote equipment 1 offsets signal according to said peak value, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb.At this; It will be understood by those skilled in the art that " continuing " is meant that each step requires to carry out obtaining of the obtaining of reception, regulatory factor of carrier signal, generation that peak value offsets signal and the equal power ratio signal of ebb according to mode of operation that set or adjustment in real time respectively, stops the reception carrier signal in a long time until radio frequency remote equipment 1.
Preferably, in step S5 (not shown), said radio frequency remote equipment 1 can also carry out Filtering Processing to the equal power ratio signal of said ebb according to preset spectrum radiation template, to obtain the filtering signal of low adjacent channel leakage power ratio.At this, said spectrum radiation template be meant appointment (band like 0.8MHz～4MHz) is launched restriction outward, makes the outer emission of band of base station can not cause undue disturbance to other business of adjacent channel with the certain bandwidth of useful signal allocated channel frequency departure.Said Adjacent Channel Leakage Power Ratio (Adjacent ChannelLeakage power Ratio) refers to that transmitting power falls the ratio of adjacent channel power with it, and the introducing of Adjacent Channel Leakage Power Ratio index is to hope interference is not caused in other base stations that are operated in its adjacent carrier in the same system.Concrete; In step S4; Possibly there is the radiation that outside channel width, forms owing to the non-linear signal of not expecting that produces (not comprising spurious signal) of modulating diffusion and transmitter in the equal power ratio signal of ebb that radio frequency remote equipment 1 is obtained beyond channel width, therefore, and in step S5; Radio frequency remote equipment 1 is according to preset spectrum radiation template; The equal power ratio signal of said ebb is carried out Filtering Processing, filter out out-of-band radiation, to obtain the filtering signal of low adjacent channel leakage power ratio.Those skilled in the art will be understood that the above-mentioned mode of obtaining the filtering signal of low adjacent channel leakage power ratio is merely for example; The mode of other existing or filtering signals that obtain low adjacent channel leakage power ratio that possibly occur from now on is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
Preferably, said preset spectrum radiation template is based on 3GPP TS 25.104 or 3GPP TS25.141 standard.Concrete; In step S5, radio frequency remote equipment 1 carries out Filtering Processing according to the preset spectrum radiation template based on 3GPP TS25.104 or 3GPP TS 25.141 standards to the equal power ratio signal of said ebb; Filter out out-of-band radiation, to obtain the filtering signal of low adjacent channel leakage power ratio.Those skilled in the art will be understood that above-mentioned standard is merely for example, and other standards existing or that possibly occur from now on also should be included in the protection range of the present invention, and be contained in this at this with way of reference as applicable to the present invention.
Preferably; In step S2; Radio frequency remote equipment 1 can also be according to the anticipation error amplitude of the vector of said one or more carrier signal, and combines the carrier wave relevant information of said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal.Particularly; In step S2; Radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of said one or more carrier signal that in step S1, is received, and combines the carrier wave relevant information of said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal.At this, said carrier wave relevant information can be that radio frequency remote equipment 1 independently obtains, and also can be the carrier wave relevant information of said one or more carrier signal of obtaining of other product or third party devices.For example; The QPSK modulation system requires Error Vector Magnitude less than 17.5%; 16QAM (quaternary quadrature amplitude modulation) mode requires Error Vector Magnitude less than 12.5%; 64QAM (octal system quadrature amplitude modulation) mode requires Error Vector Magnitude less than 8% etc., and in step S2, radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of said one or more carrier signal that in step S1, is received; And combine the desired Error Vector Magnitude of different modulation schemes, obtain the regulatory factor of said one or more carrier signal.Those skilled in the art will be understood that the above-mentioned mode of obtaining the regulatory factor of said one or more carrier signal is merely for example; The mode of other existing or regulatory factors that obtain said one or more carrier signal that possibly occur from now on is as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
More preferably, said carrier wave relevant information include but not limited to following at least each:
The realtime power of-said one or more carrier signal;
The power ratio of-said one or more carrier signal;
The historical record of the regulatory factor of-said one or more carrier signal;
The modulation scheme of-said one or more carrier signal.
Particularly; In step S2; Radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of said one or more carrier signal that in step S1, is received; And combine historical record, modulation scheme of realtime power, power ratio, the regulatory factor of said one or more carrier signal etc., obtain the regulatory factor of said one or more carrier signal.For example; Owing to be the different noise power of each allocation of carriers; The carrier wave that is high transmit power will distribute high noise power, and the low noise power of allocation of carriers of low transmitting power makes that the received signal to noise ratio (SNR) of each carrier wave is all the same with Error Vector Magnitude (EVM).Again because received signal to noise ratio is relevant with the realtime power of said one or more carrier signal; Therefore; In step S2; Radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of said one or more carrier signal that in step S1, is received, and combines the realtime power of said one or more carrier signal, can obtain the regulatory factor of said one or more carrier signal.And for example; When having multichannel carrier; Radio frequency remote equipment 1 can be according to the power ratio of the signal of said multichannel carrier; Obtain the regulatory factor of said multichannel carrier signal, for example the power ratio for four tunnel carrier signals is 8: 42: 8: 42, and then the pairing regulatory factor of this four tunnel carrier signal is respectively
for another example; To identical carrier signal; In step S2, radio frequency remote equipment 1 can directly obtain its regulatory factor according to the historical record of the regulatory factor of said carrier signal.The historical record of the regulatory factor of said carrier signal can be stored in said radio frequency remote equipment end through the mode of database.In step S2; Radio frequency remote equipment 1 can also be according to the anticipation error amplitude of the vector of said one or more carrier signal that in step S1, is received; And combine the modulation scheme of said one or more carrier signal, obtain the regulatory factor of said one or more carrier signal.For example; The QPSK modulation system requires Error Vector Magnitude less than 17.5%; 16QAM (quaternary quadrature amplitude modulation) mode requires Error Vector Magnitude less than 12.5%, and 64QAM (octal system quadrature amplitude modulation) mode requires Error Vector Magnitude less than 8% etc., in step S2; Radio frequency remote equipment 1 obtains the regulatory factor of said one or more carrier signal according to the desired Error Vector Magnitude of different modulation schemes.Those skilled in the art will be understood that above-mentioned carrier wave relevant information is merely for example, and other carrier wave relevant informations existing or that possibly occur from now on also should be included in the protection range of the present invention, and be contained in this at this with way of reference as applicable to the present invention.
Preferably, said peak value offsets to handle to operate and comprises:
-said one or more carrier signal is postponed to handle, to obtain the carrier signal after the delay;
-that the carrier signal after the said delay and reverse said peak value are offseted signal is superimposed, to obtain the equal power ratio signal of said ebb.
Particularly, in step S4, radio frequency remote equipment 1 postpones to handle to said one or more carrier signal through mode such as relay service time, to obtain the carrier signal after the delay; Then, the peak value that radio frequency remote equipment 1 will be generated in step S3 again offsets signal to carry out oppositely, and it is superimposed that the carrier signal after the said delay and reverse said peak value are offseted signal, to obtain the equal power ratio signal of ebb.For example, in radio frequency remote equipment 1, it receives the equal power ratio signal in peak in the WCDMA system in step S1; In step S2; This radio frequency remote equipment 1 is according to the anticipation error amplitude of the vector of the equal power ratio signal in said peak; For example adopt the anticipation error amplitude of the vector of QPSK (QPSK) modulation system to require less than 17.5%; And combine the signal power of the equal power ratio signal in said peak, amplitude, phase place and the positional information etc. of peak signal, obtain the regulatory factor of the equal power ratio signal in said peak; Then, in step S3, radio frequency remote equipment 1 is modulated the equal power ratio signal in peak that said radio frequency remote equipment 1 is received according to regulatory factor, and the peak value that generates the equal power ratio signal in said peak offsets signal; Subsequently; In step S4, radio frequency remote equipment 1 postpones to handle to the equal power ratio signal in said peak earlier, to obtain the carrier signal after the delay; It is superimposed again the carrier signal after the said delay and reverse said peak value to be offseted signal, to obtain the equal power ratio signal of said ebb.Those skilled in the art will be understood that the above-mentioned mode of obtaining the equal power ratio signal of said ebb is merely for example; Other existing or modes of obtaining the equal power ratio signal of said ebb that possibly occur from now on are as applicable to the present invention; Also should be included in the protection range of the present invention, and be contained in this with way of reference at this.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and under the situation that does not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore; No matter from which point; All should regard embodiment as exemplary; And be nonrestrictive, scope of the present invention is limited accompanying claims rather than above-mentioned explanation, therefore is intended to the implication of the equivalents that drops on claim and all changes in the scope are included in the present invention.Should any Reference numeral in the claim be regarded as limit related claim.In addition, obviously other unit or step do not got rid of in " comprising " speech, and odd number is not got rid of plural number.A plurality of unit of stating in the device claim or device also can be realized through software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.
Claims (12)
1. method that in radio frequency remote equipment, is used for obtaining the equal power ratio signal of ebb based on Error Vector Magnitude adjustment, wherein, this method may further comprise the steps:
A receives one or more carrier signal;
B obtains the regulatory factor of said one or more carrier signal according to the anticipation error amplitude of the vector of said one or more carrier signal;
C is according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal;
D offsets signal according to said peak value, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb.
2. method according to claim 1, wherein, this method also comprises:
-according to preset spectrum radiation template, the equal power ratio signal of said ebb is carried out Filtering Processing, to obtain the filtering signal of low adjacent channel leakage power ratio.
3. method according to claim 2, wherein, said preset spectrum radiation template is based on 3GPP TS 25.104 or 3GPP TS 25.141 standards.
4. according to each described method in the claim 1 to 3, wherein, said step b also comprises:
-according to the anticipation error amplitude of the vector of said one or more carrier signal, and combine the carrier wave relevant information of said one or more carrier signal, obtain the regulatory factor of said one or more carrier signal.
5. method according to claim 4, wherein, said carrier wave relevant information comprise following at least each:
The realtime power of-said one or more carrier signal;
The power ratio of-said one or more carrier signal;
The historical record of the regulatory factor of-said one or more carrier signal;
The modulation scheme of-said one or more carrier signal.
6. according to each described method in the claim 1 to 5, wherein, said peak value offsets to handle to operate and comprises:
-said one or more carrier signal is postponed to handle, to obtain the carrier signal after the delay;
-that the carrier signal after the said delay and reverse said peak value are offseted signal is superimposed, to obtain the equal power ratio signal of said ebb.
7. radio frequency remote equipment that is used for obtaining the equal power ratio signal of ebb based on Error Vector Magnitude adjustment, wherein, this equipment comprises:
Receiving system is used to receive one or more carrier signal;
Deriving means is used for the anticipation error amplitude of the vector according to said one or more carrier signal, obtains the regulatory factor of said one or more carrier signal;
Generating apparatus is used for according to said regulatory factor, and the peak value that generates said one or more carrier signal offsets signal;
Offset device, be used for offseting signal, said one or more carrier signal is carried out peak value offset processing, to obtain the equal power ratio signal of ebb according to said peak value.
8. radio frequency remote equipment according to claim 7, wherein, this equipment also comprises:
Filter is used for according to preset spectrum radiation template the equal power ratio signal of said ebb being carried out Filtering Processing, to obtain the filtering signal of low adjacent channel leakage power ratio.
9. radio frequency remote equipment according to claim 8, wherein, said preset spectrum radiation template is based on 3GPP TS 25.104 or 3GPP TS 25.141 standards.
10. according to each described radio frequency remote equipment in the claim 7 to 9, wherein, said deriving means also is used for:
-according to the anticipation error amplitude of the vector of said one or more carrier signal, and combine the carrier wave relevant information of said one or more carrier signal, obtain the regulatory factor of said one or more carrier signal.
11. radio frequency remote equipment according to claim 10, wherein, said carrier wave relevant information comprise following at least each:
The realtime power of-said one or more carrier signal;
The power ratio of-said one or more carrier signal;
The historical record of the regulatory factor of-said one or more carrier signal;
The modulation scheme of-said one or more carrier signal.
12. according to each described radio frequency remote equipment in the claim 7 to 11, wherein, said peak value offsets to handle to operate and comprises:
-said one or more carrier signal is postponed to handle, to obtain the carrier signal after the delay;
-that the carrier signal after the said delay and reverse said peak value are offseted signal is superimposed, to obtain the equal power ratio signal of said ebb.
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