CN201699698U - Multiplex receiving device, receiver and base station - Google Patents
Multiplex receiving device, receiver and base station Download PDFInfo
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- CN201699698U CN201699698U CN2009202741597U CN200920274159U CN201699698U CN 201699698 U CN201699698 U CN 201699698U CN 2009202741597 U CN2009202741597 U CN 2009202741597U CN 200920274159 U CN200920274159 U CN 200920274159U CN 201699698 U CN201699698 U CN 201699698U
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
Abstract
The utility model provides a multiplex receiving device, a receiver and a base station. The multiplex receiving device comprises at least two antenna ports, at least two LNAs, at least two frequency mixers, at least two IF filters, a combiner, a digital-to-analog converter (ADC) and a digital module. The multiplex receiving passage shares one ADC, and the signals from the IF filters are combined and then transmitted to the ADC. The ADC conducts digital-to-analog conversion of the combined signal and then transmits to the digital module. The multiplex receiving passage only uses one ADC, so that only one ADC is communicated with the digital module. The utility model simplifies the circuit structure, so as to reduce the overall cost of the system.
Description
Technical field
The utility model relates to network communications technology field, particularly a kind of multipath reception device, receiver and base station.
Background technology
Along with development of wireless communication devices, multipath reception system becomes the main method that improves up-link capacity and covering.At present, the receiver in the multipath reception system is made up of digital module and analog module.
At present, multipath reception system is to realize by the single channel receive path of multichannel.For example, the two-way receiving system uses the single channel receive path of two-way to realize.
At first introduce the single channel receive path below, referring to Fig. 1, this figure is a single channel receive path schematic diagram in the prior art.
Antenna port 101 receives the wireless signal in space, and wireless signal is sent to low noise amplifier (LNA, Low Noise Amplifier) 102.LNA102 amplifies signal.Signal after the amplification carries out mixing with local frequency (LO, Local Oscillator) in frequency mixer Mixer103.Be sent to analog to digital converter (ADC, Analog Digital Converter) 105 after signal process intermediate frequency (IF, Intermediate Frequency) filter 104 filtering after the mixing.The digital signal that ADC105 finishes conversion is sent to digital module 106.
The schematic diagram of the two-way receiving system that is made of the receive path of single channel shown in Figure 1 in the prior art as shown in Figure 2.
Two independent single channel receive path among Fig. 2, analog module adopts independently receive path, adopts independently ADC respectively, analog signal conversion is digital signal after, send into corresponding digital module respectively.
But, present this two-way or the multipath reception passage of forming by single channel receive path independently, require each passage that an ADC is all arranged, and each ADC back also will connect a cover digital module, increased the complexity of circuit like this, influence the layout of circuit, thereby can increase system cost.
The utility model content
The utility model embodiment provides a kind of multipath reception device, can simplify circuit structure, reduces system cost.
The utility model embodiment provides a kind of multipath reception device, comprising: antenna port, low noise amplifier (LNA), frequency mixer, intermediate-frequency filter, mixer, digital to analog converter (ADC) and digital module;
The quantity of described antenna port, LNA, frequency mixer and intermediate-frequency filter is identical, and all is at least two;
Described mixer, ADC and digital module are one;
Described antenna port is used to receive wireless signal, and the wireless signal that receives is sent to described LNA;
Described LNA is used for described wireless signal is amplified, and the signal after amplifying is sent to described frequency mixer;
Described frequency mixer, the signal that is used for receiving carries out mixing, and the signal after the mixing is sent to described intermediate-frequency filter;
Described intermediate-frequency filter, the signal that is used for receiving carries out intermediate frequency filtering, and the signal behind the intermediate frequency filtering is sent to described mixer;
Described mixer is used to receive the signal that at least two described intermediate-frequency filters send, and the signal that receives is closed the road, is sent to described ADC;
Described ADC, the signal that is used for receiving carries out analog-to-digital conversion, is sent to described digital module.
The utility model embodiment also provides a kind of receiver, comprises the described multipath reception device of above embodiment.
The utility model embodiment also provides a kind of base station, comprises the described receiver of above embodiment.
Above technical scheme, the shared ADC of multipath reception passage, the signal that comes out from each IF filter closes the road through mixer, is sent to ADC then.The ADC signal that will close behind the road carries out being sent to digital module after the analog-to-digital conversion like this.Because the multipath reception passage only uses an ADC, therefore, has only an ADC and digital module to communicate.Simplify circuit structure like this, thereby reduced the whole cost of system.
Description of drawings
Fig. 1 is a single channel receiving system schematic diagram in the prior art;
Fig. 2 is a two-way receiving system schematic diagram in the prior art;
Fig. 3 is the utility model multipath reception device embodiment one schematic diagram;
Fig. 4 is the utility model multipath reception device embodiment two schematic diagrames;
Fig. 5 is a LNA output signal frequency schematic diagram among the utility model embodiment two;
Fig. 6 is the frequency diagram of mixer output signal among the utility model embodiment two.
Embodiment
At first the utility model embodiment is realized that a kind of multipath reception device describes, and comprising: antenna port, low noise amplifier (LNA), frequency mixer, intermediate-frequency filter, mixer, digital to analog converter (ADC) and digital module;
The quantity of described antenna port, LNA, frequency mixer and intermediate-frequency filter is identical, and all is at least two;
Described mixer, ADC and digital module are one;
Described antenna port is used to receive wireless signal, and the wireless signal that receives is sent to described LNA;
Described LNA is used for described wireless signal is amplified, and the signal after amplifying is sent to described frequency mixer;
Described frequency mixer, the signal that is used for receiving carries out mixing, and the signal after the mixing is sent to described intermediate-frequency filter;
Described intermediate-frequency filter, the signal that is used for receiving carries out intermediate frequency filtering, and the signal behind the intermediate frequency filtering is sent to described mixer;
Described mixer is used to receive the signal that at least two described intermediate-frequency filters send, and the signal that receives is closed the road, is sent to described ADC;
Described ADC, the signal that is used for receiving carries out analog-to-digital conversion, is sent to described digital module.
Embodiment one:
Referring to Fig. 3, the multipath reception schematic representation of apparatus that this figure provides for the utility model embodiment.
The multipath reception device that present embodiment provides comprises: at least two antenna port 301a and 301b, at least two LNA302a and 302b, at least two frequency mixer 303a and 303b, at least two IF filter 304a and 304b, mixer 305, a digital to analog converter ADC306 and a digital module 307.
Need to prove that described antenna port, LNA, frequency mixer are identical with the quantity of IF filter, and all are at least two;
Described mixer, ADC and digital module are one;
The wireless signal that described antenna port receives passes through LNA, frequency mixer and IF filter successively, and the signal of IF filter output closes the road at described mixer, closes signal behind the road and enters digital module after through the ADC conversion.
Need to prove that the multipath reception device that present embodiment provides does not limit the number of receive path, can be for more than two and two, still, no matter several receive path all can a shared ADC.
The shared ADC of multipath reception passage, the signal that comes out from each IF filter closes the road through mixer, is sent to ADC then.The ADC signal that will close behind the road carries out being sent to digital module after the analog-to-digital conversion like this.Because the multipath reception passage only uses an ADC, therefore, has only an ADC and digital module to communicate.Simplify circuit structure like this, thereby reduced the whole cost of system.
Need to prove, the signal frequency that each antenna port receives can be identical (being that the wireless signal frequency that receives of each passage is identical), also can be different (they being the frequency difference of the wireless signal that receives of each passage), the multipath reception passage that all can use the utility model embodiment to provide.But, therefore to guarantee the frequency difference of the signal of each frequency mixer output owing to adopt same ADC.It is inequality that specifically the frequency of the signal that can receive according to each antenna port is adjusted after the mixing that the local frequency that adopts in each frequency mixer realizes each frequency mixer output the frequency of signal.
Embodiment two:
Referring to Fig. 4, the schematic diagram of the instantiation of a kind of multipath reception device that this figure provides for the utility model embodiment.
In the present embodiment, the multipath reception device is an example with the two-way receive path, introduces the implementation of multipath reception device in detail.
The frequency of the wireless signal that two antenna ports of hypothesis receive among this embodiment is identical.
Need to prove that the first antenna port 401a is identical with the frequency response characteristic of the second antenna port 401b; The one LNA402a is identical with the frequency response characteristic of the 2nd LNA402b; The first frequency mixer 403a is identical with the frequency response characteristic of the second frequency mixer 403b; The one IF filter 404a is identical with the frequency response characteristic of the 2nd IF filter 404b;
What two receive paths were different is that the first frequency mixer 403a is different with the local frequency that the second frequency mixer 403b adopts.
Introduce the flow process of received signal below:
The first antenna port 401a receives identical wireless signal (frequency is identical) with the second antenna port 401b.Signal amplifies through a LNA402a and the 2nd LNA402b respectively.
Signal after the amplification enters the first frequency mixer 403a and the second frequency mixer 403b respectively; Because the first frequency mixer 403a is different with the local frequency that the second frequency mixer 403b adopts, therefore the frequency of the signal of the first frequency mixer 403a and second frequency mixer 403b output is also inequality.
Need to prove that antenna port and LNA can not change the frequency of signal.
Like this, the signal of two different frequencies enters an IF filter 404a and the 2nd IF filter 404b respectively.Filtered signal closes the road in mixer 405.The signal that mixer 405 will close behind the road is sent to ADC406.Signal behind the involutory road of ADC406 carries out analog-to-digital conversion, and the digital signal with conversion is sent to digital module 407 then.
For those skilled in the art being understood better and implementing the utility model, describe the receiving course of signal below in detail.
Referring to Fig. 5, this figure is a LNA output signal frequency schematic diagram among the utility model embodiment two.
If wireless signal is Frf in the frequency of the first antenna port 401a and the second antenna port 401b.Frequency is that the signal of Frf is respectively Fs1 and Fs2 after through a LNA402a and the 2nd LNA402b.Because LNA does not change the frequency of signal, so the frequency of signal Fs1 and Fs2 is identical, or Frf.As shown in Figure 5.
Referring to Fig. 6, this figure is the frequency diagram of mixer output signal among the utility model embodiment two.
The first frequency mixer 403a and the second frequency mixer 403b use local frequency Flo1 and Flo2 that signal is carried out mixing respectively.
Be that signal Fs1 carries out mixing by local frequency Flo1, signal Fs2 carries out mixing by local frequency Flo2.
Because the frequency of signal Fs1 and Fs2 is identical, all is Frf, therefore, will adopt different local frequency Flo1 and Flo2 to signal Fs1 with Fs2 during mixing.Like this, could guarantee that the signal frequency after the mixing is inequality.As shown in Figure 6, the signal frequency after the mixing is respectively Fif1 and Fif2.
The signal that frequency is respectively Fif1 and Fif2 closes the road through entering mixer 405 behind an IF filter 404a and the 2nd IF filter 404b respectively.
The shared ADC of the two-way receiving system that present embodiment provides has avoided independently ADC of two of available technology adopting, thereby can simplify circuit structure, reduces the cost of system.
Need to prove that the ADC in the multipath reception passage that the utility model embodiment provides does not specifically limit its work clock, as long as can satisfy each road signals sampling.Promptly guarantee to close all intermediate-freuqncy signals behind the road in a sample region.
Need to prove, more than the frequency of the wireless signal that receives of two antenna ports identical, therefore adopted different local frequencies.Be understandable that the frequency of the wireless signal that receives when two antenna ports can adopt identical or different local frequency, not simultaneously as long as guarantee that the frequency of two signals after the mixing is different.
The multipath reception device that the utility model embodiment provides can be applied to all wireless communication technology fields, for example: in the mobile communication system, also can use in the systems such as fixed wireless access, wireless data transmission and radar.
In sum, a kind of multipath reception device that the utility model embodiment is provided, the shared ADC of multipath reception passage, the signal that comes out from each IF filter closes the road through mixer, is sent to ADC then.The ADC signal that will close behind the road carries out being sent to digital module after the analog-to-digital conversion like this.Because the multipath reception passage only uses an ADC, therefore, has only an ADC and digital module to communicate.Simplify circuit structure like this, thereby reduced the whole cost of system.
Need to prove that the utility model embodiment also provides a kind of receiver, comprise any one multipath reception device that above embodiment provides.
The utility model embodiment also provides a kind of base station, comprises any one receiver that above embodiment provides.
The above only is preferred embodiment of the present utility model, is not the utility model is done any pro forma restriction.Though the utility model discloses as above with preferred embodiment, yet be not in order to limit the utility model.Any those of ordinary skill in the art, do not breaking away under the technical solutions of the utility model scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solutions of the utility model, all still belongs in the scope of technical solutions of the utility model protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.
Claims (8)
1. a multipath reception device is characterized in that, comprising: antenna port, low noise amplifier (LNA), frequency mixer, intermediate-frequency filter, mixer, digital to analog converter (ADC) and digital module;
The quantity of described antenna port, LNA, frequency mixer and intermediate-frequency filter is identical, and all is at least two;
Described mixer, ADC and digital module are one;
Described antenna port is used to receive wireless signal, and the wireless signal that receives is sent to described LNA;
Described LNA is used for described wireless signal is amplified, and the signal after amplifying is sent to described frequency mixer;
Described frequency mixer, the signal that is used for receiving carries out mixing, and the signal after the mixing is sent to described intermediate-frequency filter;
Described intermediate-frequency filter, the signal that is used for receiving carries out intermediate frequency filtering, and the signal behind the intermediate frequency filtering is sent to described mixer;
Described mixer is used to receive the signal that at least two described intermediate-frequency filters send, and the signal that receives is closed the road, is sent to described ADC;
Described ADC, the signal that is used for receiving carries out analog-to-digital conversion, is sent to described digital module.
2. multipath reception device according to claim 1 is characterized in that, the signal frequency that each antenna port receives is identical, adopts different local frequencies in each frequency mixer.
3. multipath reception device according to claim 1 is characterized in that, the signal frequency difference that each antenna port receives adopts identical or different local frequency in each frequency mixer.
4. multipath reception device according to claim 1 is characterized in that, described antenna port, LNA, frequency mixer and intermediate-frequency filter are two;
The output signal of two described intermediate-frequency filters all is sent to described mixer, and described mixer is sent to described ADC after two paths of signals is closed the road, and described ADC carries out two paths of signals to be sent to digital module after the analog-to-digital conversion.
5. multipath reception device according to claim 4 is characterized in that two described antenna ports all receive the signal of same frequency, adopts different local frequencies in two described frequency mixers.
6. multipath reception device according to claim 4 is characterized in that two described antenna ports receive the signal of different frequency respectively, adopts identical or different local frequency in two described frequency mixers.
7. a receiver is characterized in that, comprises each described multipath reception device as claim 1-6.
8. a base station is characterized in that, comprises receiver as claimed in claim 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202741597U CN201699698U (en) | 2009-12-25 | 2009-12-25 | Multiplex receiving device, receiver and base station |
| PCT/CN2010/079827 WO2011076076A1 (en) | 2009-12-25 | 2010-12-15 | Multi-path reception apparatus, receiver and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202741597U CN201699698U (en) | 2009-12-25 | 2009-12-25 | Multiplex receiving device, receiver and base station |
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| Publication Number | Publication Date |
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| CN201699698U true CN201699698U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202741597U Expired - Lifetime CN201699698U (en) | 2009-12-25 | 2009-12-25 | Multiplex receiving device, receiver and base station |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN201699698U (en) |
| WO (1) | WO2011076076A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136845A (en) * | 2011-03-18 | 2011-07-27 | 华为技术有限公司 | Signal receiving method of active antenna and signal receiver |
| CN103684492A (en) * | 2012-09-24 | 2014-03-26 | 中兴通讯股份有限公司 | Radio frequency signal sampling device, a reception machine and a base station. |
| CN105099471A (en) * | 2015-07-16 | 2015-11-25 | 中国电子科技集团公司第三十六研究所 | Method and digital receiver for processing a plurality of sparse bandwidth signals |
| CN105515602A (en) * | 2015-11-20 | 2016-04-20 | 南京展芯通讯科技有限公司 | Multichannel multiplexing radio frequency transmitting-receiving system |
| CN107911134A (en) * | 2017-06-21 | 2018-04-13 | 天津光电通信技术有限公司 | The plate card type receiver that a kind of set AIS and ACARS signals are received |
| CN110808751A (en) * | 2019-11-08 | 2020-02-18 | 昆山立讯射频科技有限公司 | Wireless communication receiving system |
| CN111865382A (en) * | 2019-04-26 | 2020-10-30 | 华为技术有限公司 | Signal transmission circuit, signal reception circuit, electronic device, and base station |
| WO2021008545A1 (en) * | 2019-07-15 | 2021-01-21 | Huawei Technologies Co., Ltd. | Variable-rate decoder-based wireless receiver |
| CN114567353A (en) * | 2022-02-23 | 2022-05-31 | 中国电子科技集团公司第十研究所 | Low-cost digital array antenna receiving system and signal receiving method |
Family Cites Families (10)
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| CN1102012C (en) * | 1999-08-21 | 2003-02-19 | 深圳市中兴通讯股份有限公司 | Single-carrier-frequency diversity receiver of GSM base station |
| US6574459B1 (en) * | 2000-04-14 | 2003-06-03 | Lucent Technologies Inc. | Multiple branch receiver system and method |
| US7376406B2 (en) * | 2004-04-16 | 2008-05-20 | Matsushita Electric Industrial Co., Ltd. | Diversity reception apparatus |
| CN101048959A (en) * | 2004-09-23 | 2007-10-03 | 加利福尼亚大学董事会 | Multiple sub-carrier selection diversity architecture and method for wireless OFDM |
| KR20060104561A (en) * | 2005-03-30 | 2006-10-09 | 삼성전자주식회사 | Antenna selection diversity apparatus and method in a wireless communication system |
| CN100355212C (en) * | 2005-04-11 | 2007-12-12 | 南京理工大学 | Integral Ku band high balance degree multi-channel receiver |
| CN101072413A (en) * | 2007-03-01 | 2007-11-14 | 中兴通讯股份有限公司 | Mobile terminal with multi-path diversity antenna |
| JP2010213163A (en) * | 2009-03-12 | 2010-09-24 | Alps Electric Co Ltd | Diversity receiving apparatus |
| CN101510788A (en) * | 2009-03-31 | 2009-08-19 | 北京天碁科技有限公司 | Radio frequency receiving device and method capable of supporting multi-input and multi-output |
| CN101826904A (en) * | 2010-04-23 | 2010-09-08 | 哈尔滨侨航通信设备有限公司 | Method for realizing system capacity expansion by utilizing polarization diversity receiving |
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2009
- 2009-12-25 CN CN2009202741597U patent/CN201699698U/en not_active Expired - Lifetime
-
2010
- 2010-12-15 WO PCT/CN2010/079827 patent/WO2011076076A1/en active Application Filing
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102136845A (en) * | 2011-03-18 | 2011-07-27 | 华为技术有限公司 | Signal receiving method of active antenna and signal receiver |
| CN102136845B (en) * | 2011-03-18 | 2014-12-17 | 华为技术有限公司 | Signal receiving method of active antenna and signal receiver |
| CN103684492A (en) * | 2012-09-24 | 2014-03-26 | 中兴通讯股份有限公司 | Radio frequency signal sampling device, a reception machine and a base station. |
| CN105099471B (en) * | 2015-07-16 | 2018-10-26 | 中国电子科技集团公司第三十六研究所 | A kind of method and digital receiver of multiple sparse bandwidth signal processing |
| CN105099471A (en) * | 2015-07-16 | 2015-11-25 | 中国电子科技集团公司第三十六研究所 | Method and digital receiver for processing a plurality of sparse bandwidth signals |
| CN105515602A (en) * | 2015-11-20 | 2016-04-20 | 南京展芯通讯科技有限公司 | Multichannel multiplexing radio frequency transmitting-receiving system |
| CN107911134A (en) * | 2017-06-21 | 2018-04-13 | 天津光电通信技术有限公司 | The plate card type receiver that a kind of set AIS and ACARS signals are received |
| CN111865382A (en) * | 2019-04-26 | 2020-10-30 | 华为技术有限公司 | Signal transmission circuit, signal reception circuit, electronic device, and base station |
| CN111865382B (en) * | 2019-04-26 | 2022-09-02 | 华为技术有限公司 | Signal transmission circuit, signal reception circuit, electronic device, and base station |
| WO2021008545A1 (en) * | 2019-07-15 | 2021-01-21 | Huawei Technologies Co., Ltd. | Variable-rate decoder-based wireless receiver |
| US11108417B2 (en) | 2019-07-15 | 2021-08-31 | Huawei Technologies Co., Ltd. | Variable-rate decoder-based wireless receiver |
| CN110808751A (en) * | 2019-11-08 | 2020-02-18 | 昆山立讯射频科技有限公司 | Wireless communication receiving system |
| CN114567353A (en) * | 2022-02-23 | 2022-05-31 | 中国电子科技集团公司第十研究所 | Low-cost digital array antenna receiving system and signal receiving method |
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| WO2011076076A1 (en) | 2011-06-30 |
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