CN101217719B - A realization method of receiver applied in dual-mode base station - Google Patents
A realization method of receiver applied in dual-mode base station Download PDFInfo
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- CN101217719B CN101217719B CN2008100027263A CN200810002726A CN101217719B CN 101217719 B CN101217719 B CN 101217719B CN 2008100027263 A CN2008100027263 A CN 2008100027263A CN 200810002726 A CN200810002726 A CN 200810002726A CN 101217719 B CN101217719 B CN 101217719B
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Abstract
The invention discloses a realizing method of a receiver used in a double module base station, which comprises the steps that: step S102, the received multi-carrier radio frequency signals is pre-processed by the double module base station; step S104, carrier signals bearing WCDMA signals and / or carrier signals bearing GSM signals are separated from the pre-processed multi-carrier radio frequency signals; step S106, the carrier signals bearing the WCDMA signals and the / or the carrier signals bearing the GSM signals are processed, and the pre-processed carrier signals are sent to a baseband processing unit. By collocating a baseband board, the method of the invention can carry out switching between a WSDMA mode and a GSM mode (under same frequency) or simultaneous operation by different software collocation based on unchanged radio frequency modules.
Description
Technical field
The invention belongs to the mobile communcations system field, relate in particular to the up reception implementation method of the WCDMA/GSM dual-mode base station in the wireless communication system.
Background technology
Current mobile communication technology develop rapidly, along with the granting of 3G license, the standard of the mobile standard of various countries is more complicated also.Form GSM and WCDMA, multiple standard such as CDMA2000 and the situation of depositing.In some newly-built networks, operator is in order to reduce the cost of building a station, and wishes directly to be smoothly transitted into the WCDMA network at 2G network from now on existing GSM network foundation when 3G network is upgraded.For core net, can accomplish that at present WCDMA and GSM are public, but on the base station, at present the two still independently, if desired from the GSM network upgrade to the WCDMA network, just must replace to the WCDMA base station to whole GSM base station, cost is higher.
Therefore, the solution that needs a kind of receiver that is used for dual-mode base station to realize can solve the problem in the above-mentioned correlation technique.
Summary of the invention
The present invention aims to provide a kind of bimodulus WCDMA/GSM base station scheme, main thought is exactly the shared cover hardware platform in GSM and WCDMA base station, use as the GSM base station in the 2G epoch, and when network need escalate into WCDMA, only need and change a small amount of hardware (baseband board) by software upgrading and get final product smooth upgrade.
According to the present invention, a kind of receiver implementation method that is used for dual-mode base station is provided, may further comprise the steps: step S102, dual-mode base station carries out preliminary treatment to the multicarrier radiofrequency signal that receives; Step S104 isolates the carrier signal of carrying WCDMA signal and/or the carrier signal of carrying GSM signal from carried out pretreated multicarrier radiofrequency signal; And step S106, the carrier signal of carrying WCDMA signal and/or the carrier signal of carrying GSM signal are handled, and the carrier signal after will handling is sent to baseband processing unit.
Step S102 may further comprise the steps: receive the multicarrier radiofrequency signal by antenna-feedback system, and the multicarrier radiofrequency signal is carried out filtering; The multicarrier radiofrequency signal that to pass through filtering converts intermediate-freuqncy signal to; To the intermediate-freuqncy signal adjustment that gains, and will carry out the adjusted intermediate-freuqncy signal of gain and convert digital signal to.
Step S104 may further comprise the steps: digital signal is carried out demodulation, with the carrier signal of isolating carrying WCDMA signal from digital signal and/or the carrier signal of carrying the GSM signal.
Step S106 may further comprise the steps: to the carrier signal of carrying GSM signal carry out that data rate is adaptive, filtering, automatic gain control and string and conversion, and send it to baseband processing unit; And/or the carrier signal of carrying WCDMA signal directly gone here and there and conversion, multiplexing, framing, mapping and the processing of parallel data high speed serialization, and send it to baseband processing unit.
Further comprising the steps of before the AGC controlled step: as to obtain the carrier signal of received signal intensity indication parameter and carrying WCDMA signal and/or carry the power of the carrier signal of GSM signal; And, determine the AGC configuration parameter, and carry out AGC control according to the AGC configuration parameter according to the power of received signal intensity indication parameter with the carrier signal of carrier signal of carrying the WCDMA signal and/or carrying GSM signal.
Adopt the method for the invention, can under the immovable situation of radio-frequency module, switch or operation simultaneously at (under frequently) between two kinds of patterns of WCDMA, GSM by the configuration baseband board by different software arrangements.Realize the reception of GSM and two kinds of standards of WCDMA like this with a cover hardware platform, saved hardware resource, reduced the cost of website upgrading.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart that is used for the receiver implementation method of dual-mode base station according to of the present invention;
Fig. 2 shows the up reception programme schematic diagram according to the embodiment of the invention;
Fig. 3 shows the up received RF link schematic diagram according to the embodiment of the invention;
Fig. 4 shows the adaptive schematic diagram of GSM data rate according to the embodiment of the invention; And
Fig. 5 shows the NCO frequency hopping schematic diagram according to the embodiment of the invention.
Embodiment
Describe embodiments of the invention in detail below in conjunction with accompanying drawing.
Fig. 1 shows the flow chart that is used for the receiver implementation method of dual-mode base station according to of the present invention.With reference to Fig. 1, the receiver implementation method that is used for dual-mode base station according to the present invention may further comprise the steps: step S102, and dual-mode base station carries out preliminary treatment to the multicarrier radiofrequency signal that receives; Step S104 isolates the carrier signal of carrying WCDMA signal and/or the carrier signal of carrying GSM signal from carried out pretreated multicarrier radiofrequency signal; And step S106, the carrier signal of carrying WCDMA signal and/or the carrier signal of carrying GSM signal are handled, and the carrier signal after will handling is sent to baseband processing unit.
Step S102 may further comprise the steps: receive the multicarrier radiofrequency signal by antenna-feedback system, and the multicarrier radiofrequency signal is carried out filtering; The multicarrier radiofrequency signal that to pass through filtering converts intermediate-freuqncy signal to; To the intermediate-freuqncy signal adjustment that gains, and will carry out the adjusted intermediate-freuqncy signal of gain and convert digital signal to.
Step S104 may further comprise the steps: digital signal is carried out demodulation, with the carrier signal of isolating carrying WCDMA signal from digital signal and/or the carrier signal of carrying the GSM signal.
Step S106 may further comprise the steps: to the carrier signal of carrying GSM signal carry out that data rate is adaptive, filtering, AGC (automatic gain control) and string and change, and send it to baseband processing unit; And/or the carrier signal of carrying WCDMA signal directly gone here and there and conversion, multiplexing, framing, mapping and the processing of parallel data high speed serialization, and send it to baseband processing unit.
Further comprising the steps of before the AGC controlled step: as to obtain the carrier signal of received signal intensity indication parameter and carrying WCDMA signal and/or carry the power of the carrier signal of GSM signal; And, determine the AGC configuration parameter, and carry out AGC control according to the AGC configuration parameter according to the power of received signal intensity indication parameter with the carrier signal of carrier signal of carrying the WCDMA signal and/or carrying GSM signal.
Fig. 2 shows the up reception programme schematic diagram according to the embodiment of the invention.In this embodiment, the system that is used to realize this embodiment comprises duplexer and LNA unit (DFL), received signal RF processing unit (RX-RFP), clock and local oscillator unit (CLK), analog to digital converter (ADC), received signal processor (RSP) and radio frequency baseband interface controller (RBP).Antenna-feedback system receives the up G/W signal of multicarrier radio frequency, pass through the filtering of duplexer and the amplification of low noise amplifier then, by radio-frequency filter filtering frequency mixer mirror image noise jamming, carry out down-converted in the arrival frequency mixer and convert intermediate-freuqncy signal to, and then through the intermediate frequency amplification filtering, by intermediate-frequency filter AD sampling aliasing frequency spectrum is suppressed, after adjusting by gain again, in analog to digital converter, carry out analog to digital conversion, it is transformed into digital signal, (RSP) carries out digital demodulation to this digital signal by the received signal processor, extract, filtering, AGC control, data rate is adaptive, string and conversion and data multiplex, finish framing by the radio frequency baseband interface controller, mapping and parallel data high speed serializationization finally flow to Base Band Unit through optical module and handle.
In this embodiment, receiver design bandwidth 20M, each receives path can support 8 GSM carrier waves or 4 WCDMA carrier waves at most, receiver mainly contains following several configuration when using:
S6(GSM/EDGE)+S1(WCDMA)
S4(GSM/EDGE)+S2(WCDMA)
S2(GSM/EDGE)+S3(WCDMA)
S8(GSM/EDGE)
S4(WCDMA)
Can under the situation that does not change radio-frequency module, switch or operation simultaneously at (under frequently) between two kinds of patterns of WCDMA, GSM by the configuration baseband board by software arrangements.
Below in conjunction with Fig. 3～Fig. 5 an alternative embodiment of the invention is described.
In this embodiment, following realization radio frequency link: the numerical portion of dual mode receiver and radio frequency link partly adopt the scheme of existing comparative maturity, realize link as shown in Figure 3.The key technology of this embodiment concentrates on the signal processing of digital intermediate frequency.
ADC output sends to FPGA (field programmable gate array) through the digital signal after changing, and does signal processing in FPGA inside, and signal processing is finished following a few thing:
(1) by NCO (digital oscillator) the W/G signal is carried out Digital Down Convert and handle, each carrier signal is separated, then by extraction, filtering and AGC control.Before AGC control, finish and receive the RSSI parameter acquiring, obtain the power of each carrier wave, according to given algorithm, calculate the AGC configuration parameter, after finishing AGC control, the DDC in the signal processor (digital down converter) output speed is the WCDMA IQ data of 7.68MSPS and the GSM IQ data that speed is B.
(2) GSM frequency hopping control
The operation principle of GSM frequency hopping is that the frequency synthesizer of each receiver is controlled, and makes it be operated in different frequencies by certain frequency hop sequences at each time slot.For broadband transceiver, can be in signal processor according to the different frequent points carrier information that receives, the Frequency point of the NC0 by changing signal processor realizes receiving the GSM carrier signal of different frequent points.The NCO frequency hopping of GSM receives as shown in Figure 4.
(3) rate adapted of GSM data
The GSM/WCDMA dual-mode base station requires to realize this two kinds of standards with a cover hardware platform, wherein, relates to the problem that how to realize GSM/EDGE signal and WCDMA signal fused.What the modulation of GSM/EDGE system was adopted is the GMSK/8PSK mode, and its modulation rate is 270.833K symbol/s; And the modulation of WCDAM system is adopted is the QPSK/16QAM mode, and its modulation rate is 3.84Mchip/s.The GSM received signal is B according to the modulation rate transmission of WCDMA through baseband I, the Q data rate that comes out after Digital Down Convert and the filtering, and B speed is not equal to 541.67Kbps, must be fitted to 541.67Kbps through handling.Because it is bigger to satisfy the insertion value and the decimation value of rate transition, so, must segmentation carry out, to avoid the restriction of high speed processing.Specific implementation such as Fig. 5, the I of output, Q are 16bit.
(4) the IQ data of received signal processor output are exported to the radio frequency baseband interface controller behind interface FPGA translation data form, finish the function of framing, mapping and parallel data high speed serializationization by interface controller, finally transfer out by light path through optical module.
When need upgrade in the base station, only need download into veneer to configurator according to different configurations, just can switch or operation simultaneously at (under frequently) between two kinds of patterns of WCDMA, GSM, realize the reception of W/G bimodulus.
Mainly contain following several software arrangements in the time of in the dual mode receiver use:
S6(GSM/EDGE)+S1(WCDMA)
S4(GSM/EDGE)+S2(WCDMA)
S2(GSM/EDGE)+S3(WCDMA)
S8(GSM/EDGE)
S4(WCDMA)
Adopt the method for the invention, can under the immovable situation of radio-frequency module, switch or operation simultaneously at (under frequently) between two kinds of patterns of WCDMA, GSM by the configuration baseband board by different software arrangements.Realize the reception of GSM and two kinds of standards of WCDMA like this with a cover hardware platform, saved hardware resource, reduced the cost of website upgrading.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a receiver implementation method that is used for dual-mode base station is characterized in that, may further comprise the steps:
Step S102, dual-mode base station carries out preliminary treatment to the multicarrier radiofrequency signal that receives;
Step S104 isolates the carrier signal of carrying WCDMA signal and/or the carrier signal of carrying GSM signal from carried out pretreated described multicarrier radiofrequency signal; And
Step S106 the carrier signal of described carrying WCDMA signal and/or the carrier signal of described carrying GSM signal are handled, and the described carrier signal after will handling is sent to baseband processing unit;
Wherein, described step S102 may further comprise the steps:
Receive the multicarrier radiofrequency signal by antenna-feedback system, and described multicarrier radiofrequency signal is carried out filtering;
The described multicarrier radiofrequency signal that to pass through filtering converts intermediate-freuqncy signal to;
To the adjustment that gains of described intermediate-freuqncy signal, and will carry out the adjusted described intermediate-freuqncy signal of gain and convert digital signal to.
2. method according to claim 1 is characterized in that, described step S104 may further comprise the steps:
Described digital signal is carried out demodulation, with the carrier signal of from described digital signal, isolating carrying WCDMA signal and/or the carrier signal of carrying the GSM signal.
3. method according to claim 2 is characterized in that, described step S106 may further comprise the steps:
To the carrier signal of carrying described GSM signal carry out that data rate is adaptive, filtering, automatic gain control and string and conversion, and send it to described baseband processing unit; And/or
The carrier signal of carrying described WCDMA signal is directly gone here and there and conversion, multiplexing, framing, mapping and the processing of parallel data high speed serialization, and send it to described baseband processing unit.
4. method according to claim 3 is characterized in that, and is further comprising the steps of before described automatic gain controlled step:
Obtain the power of the carrier signal of the carrier signal of received signal intensity indication parameter and described carrying WCDMA signal and/or described carrying GSM signal; And
Power according to the carrier signal of the carrier signal of described received signal intensity indication parameter and described carrying WCDMA signal and/or described carrying GSM signal, determine automatic gain control configuration parameter, and carry out described automatic gain control according to described automatic gain control configuration parameter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5243615B2 (en) | 2008-11-05 | 2013-07-24 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Dual mode base station |
| CN101790256B (en) * | 2009-01-22 | 2014-09-10 | 中兴通讯股份有限公司 | Signal receiving machine, signal sending machine and signal processing method |
| CN101754386B (en) * | 2010-01-20 | 2012-04-04 | 华为技术有限公司 | Method and device for adjusting business processing resources of multi-mode base station system |
| CN101778389B (en) * | 2010-01-29 | 2012-05-23 | 华为技术有限公司 | Multi-system type data processing method and device |
| CN103068048A (en) * | 2011-10-24 | 2013-04-24 | 北京三星通信技术研究有限公司 | Method and device for cellular communications |
| CN102421133B (en) * | 2011-11-28 | 2014-11-12 | 上海创远仪器技术股份有限公司 | Mode switching method of multi-mode mobile terminal test equipment and apparatus thereof |
| CN103188191A (en) * | 2011-12-28 | 2013-07-03 | 中兴通讯股份有限公司 | Multi-carrier receiver and gain calibration method thereof |
| CN105323781A (en) * | 2014-07-22 | 2016-02-10 | 中兴通讯股份有限公司 | Detection parameter obtaining method and device of multi-standard base station |
| CN107544343B (en) * | 2017-09-26 | 2020-12-04 | 贵州航天天马机电科技有限公司 | Wireless communication frequency hopping controller |
| CN112532268B (en) | 2019-09-19 | 2023-10-20 | 中兴通讯股份有限公司 | Communication circuit and communication equipment |
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Effective date of registration: 20170825 Address after: 272000, Shandong County, Jining City, Liangshan Province Road Village, Yuen Village, No. 226 Patentee after: Yuan Xinhui Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong high tech Industrial Park, ZTE building Patentee before: ZTE Corporation |
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Address after: 541002 No. two, No. 5, West Road, Xiangshan District, Guilin, the Guangxi Zhuang Autonomous Region Patentee after: Yuan Xinhui Address before: 272000, Shandong County, Jining City, Liangshan Province Road Village, Yuen Village, No. 226 Patentee before: Yuan Xinhui |
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