CN1571547A - A transceiver singleboard - Google Patents
A transceiver singleboard Download PDFInfo
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- CN1571547A CN1571547A CNA031332994A CN03133299A CN1571547A CN 1571547 A CN1571547 A CN 1571547A CN A031332994 A CNA031332994 A CN A031332994A CN 03133299 A CN03133299 A CN 03133299A CN 1571547 A CN1571547 A CN 1571547A
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- intermediate frequency
- module
- single plate
- process module
- transmission channel
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Abstract
This invention brings a send receive message machine single plate. The plate includes intermediate frequency signal processing module which is consisted by base band digital signal processing part, digital up converter, digital-to-analog converter, intermediate frequency filter and intermediate frequency amplifier. Parts or all packages of the module can be integrated to module structure which is movable. It is only to replace the integrated module of needed parts to realize its emission performance when base station transmitter emission is under supporting different carrier wave number. The cost of this invention is reduced because the DAC device needed in this invention is the common device. Besides, up-conversion frequency is reduced by the raised output intermediate frequency, and the complexity of the circuit is also reduced at the same time.
Description
Technical field
The invention belongs to communication field, relate in particular to a kind of transceiver single plate.
Background technology
At present, transceiver single plate is the pith that constitutes base station transmitter, and transceiver single plate is finished the conversion process of receiving and transmitting signal, modulates transmitting, upconvert to tranmitting frequency, carry out giving follow-up power amplifier after certain pre-amplification and the Filtering Processing; Carry out filtering to received signal, be down-converted to intermediate frequency, carry out filtering and demodulation process again.
Existing multicarrier transmitter is owing to need to support emitting performance under the different carrier situation simultaneously, on intermediate-frequency bandwidth, choose the filter of supporting maximum carrier number transmitted bandwidth, under this pattern, make transmitter handle carrier number seldom, for example under the situation of 1 carrier wave, intermediate-frequency filter descends greatly to the outer supression ability of band that transmits.For example the transmitter of supporting 4 carrier waves is when being used for 1 carrier transmit, and transmitter intermediate-frequency bandwidth is 4 carrier bandwidths, and is almost nil to neighboring trace supression ability under 1 carrier wave, also very little every road supression ability.Therefore such transmitter is under the few situation of carrier number, and the neighboring trace leaks performance of transmitter output signal is subjected to very big challenge.
Solution of the prior art is: adopt specific digital-to-analog converter (DAC:Digital Analog converter) device in the transmission channel of transceiver single plate, numeric field before DAC uses high order filter to carry out the supression of out of band signal, with assurance the neighboring trace of signal is fully restrained.In order to bring into play the optimum performance of DAC, reduce the output frequency of DAC simultaneously, owing to have on the DAC output frequency reduce, thereby make the up-conversion increased frequency, increase local oscillator and frequency mixer, thereby made the transmitter architecture complexity.
For example, for the performance that makes the DAC output signal reaches requirement, output signal frequency can only be reduced to tens000000 frequency, by once upconverting to higher intermediate frequency 300MHz, upconverts to the rf frequency 2GHz of emission once more.
In sum, there is following shortcoming in the scheme that base station transmitter adopts for the emission that adapts to the different IF bandwidth signal in the prior art:
1, because different transceiver single plates can only be finished fixing carrier number, so when the carrier number of transmitter support changes, need to change the transceiver single plate of whole transmitter;
2, when different transceiver support support emission carrier number variations, the solution of prior art requires very high to the DAC device performance, and because the up-conversion increased frequency, thereby make circuit complexity, cost increase.
Summary of the invention
The present invention proposes a kind of transceiver single plate, with solve exist in the prior art must change whole transceiver single plate with the emission that adapts to the different IF bandwidth signal and to DAC requirement on devices height and owing to the up-conversion increased frequency makes problems such as circuit complexity, cost height.
For addressing the above problem, solution of the present invention is:
A kind of transceiver single plate comprises transmission channel, it is characterized in that:
Described transmission channel includes the intermediate frequency process module, and this module is made up of the baseband digital signal processing unit, digital up converter, digital-to-analog converter, intermediate-frequency filter and the intermediate frequency amplifier that are linked in sequence;
Baseband signal is from the baseband digital signal processing unit input of this intermediate frequency process module, and analog if signal is after treatment handled by the subsequent conditioning circuit of this transmission channel again.
The each several part assembly of this intermediate frequency process module can be partly or entirely integrated.
This transceiver single plate includes a more than transmission channel, and the intermediate frequency process module of each transmission channel can be integrated into a module.
The lower floor of described transceiver single plate is a circuit printing plate, is the metallic shield box above the circuit printing plate at this, is useful on the sunk part that holds this intermediate frequency process module above the metallic shield box at this.
The lower floor of this intermediate frequency process module is a circuit printing plate, is the metallic shield box above the circuit printing plate at this, this intermediate frequency process module is installed in this sunk part constitutes an integral body.
The present invention proposes a kind of transceiver single plate, this transceiver single plate includes the intermediate-freuqncy signal processing module of being made up of baseband digital signal processing unit, digital up converter, digital-to-analog converter, intermediate-frequency filter and intermediate frequency amplifier, and the part or all of assembly of this module can be integrated into disconnectable modular structure, make at base station transmitter when supporting the emission of different carrier number, only need to realize its emitting performance by the integrated module of required component by changing.Because the present invention does not do excessive demand to the performance of DAC device, can use conventional DAC device, thereby reduce cost.In addition, owing to improved the output IF-FRE of DAC device, and then reduced the up-conversion number of times, also reduced the complexity of circuit simultaneously.
Description of drawings
Fig. 1 is the supression ability schematic diagram of prior art median filter to transmitting;
Fig. 2 is the described transceiver single plate Organization Chart of the embodiment of the invention;
Fig. 3 is the scheme of installation of the described module of the embodiment of the invention in transceiver single plate.
Embodiment
At first under the few situation of carrier number, filter is simply introduced so that better understand the present invention the influence of the supression ability that transmits.
As shown in Figure 1: the transverse axis among the figure is a frequency, and the longitudinal axis is an amplitude response, and wherein, label 1 is the filter freguency response characteristic curve in a broadband; Label 2 is 4 and transmits.
As can be seen from the figure, in the intermediate-frequency filter passband, 4 transmit and can well pass through, and the frequency spectrum beyond transmitting is subjected to the supression of intermediate-frequency filter.For 4 carrier signals, filter can well be restrained the signal beyond transmit middle highest frequency signal and the low-limit frequency, has just had very high amplitude to restrain in the very near place of offset signal, and this is that the embodiment of the invention is needed.When this filter is used for the arrowband, for example during the filtering of 1 carrier signal, can see in the certain frequency scope of the offset carrier left and right sides and not restrain that signal is in the passband of intermediate-frequency filter.Therefore under the few situation of carrier number, the neighboring trace supression ability of transmitter is very limited.
The described transceiver single plate framework of embodiments of the invention, intermediate frequency process module in this transmission channel can be formed also and its all components can be integrated into modular structure 3 by the baseband digital signal processing unit that is linked in sequence, digital up converter UDC, digital-to-analog converter DAC, intermediate-frequency filter and intermediate frequency amplifier, as shown in Figure 2.Wherein, the concrete model of the assembly that the intermediate frequency process module is comprised is difference to some extent according to utilization, and to the no specific (special) requirements of assembly itself, digital-to-analog converter DAC is conventional DAC device.The baseband digital signal processing unit uses on-site programmable gate array FPGA (Field Programmable Gate Array) realization, digital up converter UDC and digital-to-analog converter DAC to use the AD9857 that unites two into one to realize among this embodiment.
Whole transmission channel is done following the processing to input signal: derive from the input signal of the baseband signal of veneer external interface as the intermediate frequency process module in this transmission channel, after after the baseband digital signal processing unit is handled, entering digital up converter UDC and carrying out corresponding frequency-conversion processing, entering digital-to-analog converter DAC again is analog if signal with this digital signal conversion, this analog if signal is through the intermediate-frequency filter Filtering Processing, be amplified into frequency mixer by intermediate frequency amplifier again, carry out mixing with the emission local oscillation signal, conversion obtains required radiofrequency signal, and the signal of output is handled back output veneer through emission radio-frequency filter and radio frequency amplifier at last.
Carrier number changes owing to transmit, and the adaptive capacity of this transceiver single plate is also had different requirements, so, can carry out the part assembly in the intermediate frequency process module integrated, as shown in Figure 2, wherein: what marked among the figure 1,2 is respectively the modular structure of different assemblies after integrated, is specially:
Modular structure 1 comprises intermediate-frequency filter and intermediate frequency amplifier;
Use modular structure 1, can obtain minimum replacing parts, but requirement adaptive capacity of non-exchange part on transceiver single plate is bigger; And use modular structure 3, obviously change the cost height of parts, but adaptive capacity is strong.According to the variation of the carrier number that transmits and change the different structure module accordingly.
The described module of the embodiment of the invention is designed to conveniently detachable structure, and its scheme of installation as shown in Figure 3.One deck is the PCB circuit printing plate below the transceiver single plate 3, is the metallic shield box above, wherein a pit is arranged so that installed module 4 on this metallic shield box.Module also is the outside metallic shield box that is, is the PCB circuit printing plate below, and the thickness of this module is the height of the pit reserved on the veneer, so that just the same with veneer high after module being installed in the pit of veneer, forms an integral body.When this module was installed, 4 angular positions that can be on module were by being fixed with screw, followingly then were connected by connector with veneer.When carrier number changes, take off original module, change the transceiver single plate that new module can obtain adapting to new carrier number.
By the structure of the described transceiver single plate of the invention described above embodiment as can be seen, the outer supression ability of the band that transmits of any carrier number all can realize by changing the module of being made up of different filter assemblies, the performance of DAC device no longer is subject to and realizes neighboring trace supression index, but retrain by the performance index in the band.In this case, can reduce the dynamic requirements to the DAC device greatly, the frequency of DAC output simultaneously also can effectively be improved, and send channel may be reduced to the up-conversion form one time, thereby has simplified the complexity of transmission channel circuit greatly.
In addition, because the corresponding module of a transmission channel of described transceiver single plate, and on highdensity transceiver single plate, a more than transmission channel can be arranged, at this moment, the number of transmission channel is suitable with the number of module.In this case, can use a plurality of independently modules to deal with the variation of transmission channel quantity, also the function that original a plurality of modules can be finished realizes that with a module it is an another embodiment of the present invention.
The embodiment of the invention makes when base station transmitter is supported the emission of different carrier number by adopt the intermediate-freuqncy signal processing module in transceiver single plate, only needs can realize its emitting performance by changing the integrated module of required component.Because the present invention does not do excessive demand to the performance of DAC device, can use conventional DAC device, thereby reduce cost.In addition, owing to improved the output IF-FRE of DAC device, and then reduced the up-conversion number of times, also reduced the complexity of circuit simultaneously.
Claims (5)
1, a kind of transceiver single plate comprises transmission channel, it is characterized in that:
Described transmission channel includes the intermediate frequency process module, and this module is made up of the baseband digital signal processing unit, digital up converter, digital-to-analog converter, intermediate-frequency filter and the intermediate frequency amplifier that are linked in sequence;
Baseband signal is from the baseband digital signal processing unit input of this intermediate frequency process module, and analog if signal is after treatment handled by the subsequent conditioning circuit of this transmission channel again.
2, a kind of transceiver single plate as claimed in claim 1 is characterized in that: the each several part assembly of this intermediate frequency process module can be partly or entirely integrated.
3, a kind of transceiver single plate as claimed in claim 1 is characterized in that: this transceiver single plate includes a more than transmission channel, and the intermediate frequency process module of each transmission channel can be integrated into a module.
4, as claim 1,2 or 3 described a kind of transceiver single plates, it is characterized in that: the lower floor of described transceiver single plate is a circuit printing plate, at this is the metallic shield box above circuit printing plate, is useful on the sunk part that holds this intermediate frequency process module above the metallic shield box at this.
5, a kind of transceiver single plate as claimed in claim 4, it is characterized in that: the lower floor of this intermediate frequency process module is a circuit printing plate, at this is the metallic shield box above circuit printing plate, this intermediate frequency process module is installed in this sunk part constitutes an integral body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031332994A CN100384268C (en) | 2003-07-26 | 2003-07-26 | A transceiver singleboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031332994A CN100384268C (en) | 2003-07-26 | 2003-07-26 | A transceiver singleboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1571547A true CN1571547A (en) | 2005-01-26 |
| CN100384268C CN100384268C (en) | 2008-04-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031332994A Expired - Fee Related CN100384268C (en) | 2003-07-26 | 2003-07-26 | A transceiver singleboard |
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| Country | Link |
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| CN (1) | CN100384268C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188817B (en) * | 2006-11-15 | 2014-09-17 | 华为技术有限公司 | Multi-system base station, its signal receiving and transmission method and wireless communication network |
| CN107592126A (en) * | 2017-09-18 | 2018-01-16 | 贵州航天天马机电科技有限公司 | A kind of radio-frequency receiving-transmitting channel cellular construction |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5579341A (en) * | 1994-12-29 | 1996-11-26 | Motorola, Inc. | Multi-channel digital transceiver and method |
| US6735181B1 (en) * | 2000-06-26 | 2004-05-11 | Atmel Corporation | Wireless transceiver with subtractive filter compensating both transmit and receive artifacts |
| CN1110155C (en) * | 2000-10-09 | 2003-05-28 | 华为技术有限公司 | Base station power controlling method and device |
| CN100426895C (en) * | 2001-12-07 | 2008-10-15 | 中兴通讯股份有限公司 | Signal receiving method and apparatus in wireless base station |
-
2003
- 2003-07-26 CN CNB031332994A patent/CN100384268C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188817B (en) * | 2006-11-15 | 2014-09-17 | 华为技术有限公司 | Multi-system base station, its signal receiving and transmission method and wireless communication network |
| US9137853B2 (en) | 2006-11-15 | 2015-09-15 | Huawei Technologies Co., Ltd. | Multi-mode base station and method for sending/receiving signal thereof |
| CN107592126A (en) * | 2017-09-18 | 2018-01-16 | 贵州航天天马机电科技有限公司 | A kind of radio-frequency receiving-transmitting channel cellular construction |
| CN107592126B (en) * | 2017-09-18 | 2023-03-28 | 贵州航天天马机电科技有限公司 | Radio frequency receiving and transmitting channel unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100384268C (en) | 2008-04-23 |
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