CN1162026C - Base band processor integrating more modulation functions and method for implementing different modulations - Google Patents
Base band processor integrating more modulation functions and method for implementing different modulations Download PDFInfo
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Abstract
The present invention relates to a multiple modulation function baseband processor and an implementation method thereof, which is characterized in that the multiple modulation function baseband processor comprises a digital modulation part, a high-speed digital-to-analog converter part and a low-pass filter part. Control signals can be selected through the external input mode so as to control the processor to be in a GMSK modulation mode, a 8PSK modulation mode or a GMSK/8PSK modulation switchable mode. The present invention can reduce cost and power consumption in a wireless digital transmitter, meanwhile, supports the EDGE, and enhances the compatibility and the upgrading capability of a communication system with high signal quality.
Description
The present invention relates to a kind of base station transmitter that is used to support EDGE (strengthening the global system for mobile communications of data rate), the integrated base station baseband processor of two kinds of modulation functions of Guassian Minimum Shift Keying GMSK (hereinafter to be referred as GMSK)/8 phase phase-shift keying (hereinafter to be referred as 8PSK).
The second generation mobile communication system that with GSM is representative is very ripe, mainly is the main flow business with the speech.But along with the high speed of the Internet (Internet) emerges, the demand develop rapidly of the data communication by wireless air interface, second generation mobile communication system is to 3-G (Generation Three mobile communication system) evolution.This compatibility and upgrading ability to mobile communication system has proposed demand.EDGE (Enhanced Datarate for GSMEvolution) is based on the wireless access system that GSM grows up, and is the transition stage to third generation evolution.It still adopts the frequency partition with identical frequency spectrum of GSM and 200k Hz, can coexist as in the same net with the GSM system easily, and realize compatible.EDGE mainly is by changing modulation system, realize the data service up to 384K bps in the frequency spectrum of 200K Hz.EDGE adopts two kinds of modulating mode: 8PSK and GMSK; Stipulated two class portable terminals: category-A, up link adopt the GMSK modulation, and down link adopts the 8PSK modulation; Category-B, the uplink and downlink link is all modulated with 8PSK.The 8PSK modulation is the new modulation system that proposes in the EDGE agreement.
In the mobile communication system of the second generation, gsm system occupies the very big market share, the main purpose of EDGE system is the ability that strengthens in existing GSM transmission system transmitting data business, therefore, the application prospect of the base station baseband processor of two kinds of modulation functions of integrated GMSK/8PSK is very wide.
The objective of the invention is in order to overcome the shortcoming that existing base station baseband processor device has only a kind of modulation function, and propose a kind of in the base station baseband processor integrated GMSK modulation and 8PSK modulation function, can realize that GMSK modulation and 8PSK modulation take over seamlessly, support the baseband modulation of EDGE to handle application, simultaneously processor is inner integrated high speed D/A and low pass filter, can directly export modulated Simulation with I, Q component integrating more modulation functions the base station baseband processor and realize the method for multiple modulation.
The technical scheme that realizes the object of the invention is:
A kind of integrated base station baseband processor of multiple modulation function, comprise Guassian Minimum Shift Keying GMSK modulation and 8 integrated two kinds of functions of phase-shift keying modulation mutually, this processor comprise that digital modulation part, high speed D/A are partly and the low pass filter part; Described digital modulation part receives and treats modulating data input signal and model selection control signal, exports mutually orthogonal modulated digital in-phase component and quadrature component to the high speed D/A; High speed D/A module is finished the D/A switch to digital modulation output, will simulate modulated output signal and deliver to low pass filter; Low pass filter is finally exported mutually orthogonal modulated analog in-phase component and quadrature component after finishing low-pass filtering;
Be characterized in: described digital modulation part comprises control signal generation module, Guassian Minimum Shift Keying GMSK modulation module, 8 phase phase-shift keying modulation modules, clock generating module and output selection module; Described control signal generation module receiving mode is selected control signal; Generate two path control signal through the control signal generation module, the one road to the clock generation module, and module is selected to output in another road; The clock generating module is exported three road signals respectively, and one road clock is selected module to output, and one road Guassian Minimum Shift Keying GMSK clock enables the Guassian Minimum Shift Keying GMSK modulation module, and another road 8 phase phase-shift keying clocks enable 8 phase phase-shift keying modulation modules; Simultaneously the Guassian Minimum Shift Keying GMSK modulation module with 8 mutually the phase-shift keying modulation module receive and treat modulating data, respectively the Guassian Minimum Shift Keying GMSK clock in input enable, under the 8 phase phase-shift keying clock enable signals control, treat modulating data and carry out modulation treatment, and export Guassian Minimum Shift Keying GMSK modulation in-phase component respectively, phase-shift keying modulation in-phase component, quadrature component are selected module to output to quadrature component mutually with 8, select module to select by output then, export modulated digital in-phase component, quadrature component to the high speed D/A.
The above-mentioned integrated base station baseband processor of multiple modulation function, wherein: described Guassian Minimum Shift Keying GMSK modulation module comprises Guassian Minimum Shift Keying GMSK table look-up address generation module, Guassian Minimum Shift Keying GMSK modulation table lookup operation module and dateout processing module; Treat that modulating data is input to the address generation module of tabling look-up, the generation address of tabling look-up, output to Guassian Minimum Shift Keying GMSK modulation table lookup operation module, finish the processing of tabling look-up, checking result outputs to the dateout processing module, the dateout processing module is handled checking result, output Guassian Minimum Shift Keying GMSK modulation in-phase component, quadrature component.
The above-mentioned integrated base station baseband processor of multiple modulation function, wherein: described 8 phase phase-shift keying modulation modules comprise 8 phase phase-shift keyings table look-up address generation module, 8 phase phase-shift keyings modulation table lookup operation module, dateout processing module and the summation output module that adds up; Treat that the modulating data input signal is input to the 8 phase phase-shift keyings address generation module of tabling look-up, generate the address of tabling look-up by table look-up address generation module of 8 phase phase-shift keyings, output to 8 phase phase-shift keyings modulation table lookup operation module, checking result outputs to the dateout processing module, after add up summation back output 8PSK modulation in-phase component, quadrature component.
A kind of base station baseband processor is realized the method that multiple modulation system is integrated, and the model selection control signal processor controls of importing by the outside is in one of three kinds of working methods: changeable mode is modulated in Guassian Minimum Shift Keying GMSK modulation system, 8 phase phase-shift keying modulation systems, Guassian Minimum Shift Keying GMSK/8 phase phase-shift keyings; When processor worked in the Guassian Minimum Shift Keying GMSK modulation system, the circuit of 8 phase phase-shift keying modulating part was not worked; When processor worked in 8 phase phase-shift keying modulation systems, the circuit of Guassian Minimum Shift Keying GMSK modulating part was not worked; Guassian Minimum Shift Keying GMSK/when switchable mode was modulated in 8 phase phase-shift keyings, the circuit of Guassian Minimum Shift Keying GMSK modulation, 8 phase phase-shift keying modulating part was all in running order when processor works in;
Be characterized in,, realize that in digital modulation part its implementation is the control of processor working state:
A, when processor works in the Guassian Minimum Shift Keying GMSK modulation system, make 8 phase phase-shift keying clock enable signals remain low level, control 8 phase phase-shift keying modulating part circuit and do not work, simultaneously, fixing Guassian Minimum Shift Keying GMSK modulation in-phase component, the quadrature component selected exported;
B, when processor works in 8 phase phase-shift keying modulation systems, make Guassian Minimum Shift Keying GMSK clock enable signal remain low level, control Guassian Minimum Shift Keying GMSK modulating part circuit is not worked, and simultaneously, fixing 8 phase phase-shift keyings modulation in-phase component, the quadrature component selected exported;
C, work in Guassian Minimum Shift Keying GMSK GMSK/8PSK when modulating switchable mode when processor, the Guassian Minimum Shift Keying GMSK clock enables, all normally output of 8 phase phase-shift keying clock enable signals, Guassian Minimum Shift Keying GMSK modulating part circuit, 8 phase phase-shift keying modulating part circuit are all in running order, simultaneously, select in output between Guassian Minimum Shift Keying GMSK modulation result and 8 phase phase-shift keying modulation result, to switch output under the control of control signal.
Above-mentioned base station baseband processor is realized multiple modulator approach, wherein, to take over seamlessly be by output being selected control signal, Guassian Minimum Shift Keying GMSK modulation output, 8 phase phase-shift keyings modulation output carry out the adjustment of suitable sequential respectively, realize when making it satisfy Guassian Minimum Shift Keying GMSK/8 phase phase-shift keyings modulation switching mode in described realization.
Above-mentioned base station baseband processor is realized multiple modulator approach, wherein, when digital modulation part is in the Guassian Minimum Shift Keying GMSK modulation system, 8 phase phase-shift keying modulation modules is not worked; When digital modulation part was in 8 phase phase-shift keying modulation systems, the Guassian Minimum Shift Keying GMSK modulation module was not worked.
Above-mentioned base station baseband processor is realized multiple modulator approach, and wherein, the look-up table that described Guassian Minimum Shift Keying GMSK modulation adopts 8 multiplication of voltages to contract is realized.
Above-mentioned base station baseband processor is realized multiple modulator approach, and wherein, the summation of tabling look-up that described 8 phase phase-shift keyings modulation adopts 8 multiplication of voltages to contract realizes.
Because the present invention has adopted above technical measures, can reduce cost, power consumption in the wireless digital transmitter, and the support to EDGE is provided simultaneously, increases the compatibility and the upgrading ability of communication system.Simultaneously integrated multiple modulation system in the digital base stations baseband processor is used flexibly, and the signal quality height is with a wide range of applications.
Concrete feature of the present invention, performance are further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is a system architecture diagram of the present invention.
Fig. 2 is the structured flowchart of digital modulation part of the present invention.
Fig. 3 is a GMSK modulation module functional block diagram of the present invention.
Fig. 4 is a 8PSK modulation module functional block diagram of the present invention.
Fig. 5 is a kind of Application Example of the present invention---support the base station system functional block diagram of EDGE.
GMSK modulation and 8PSK modulation are the modulation systems of stipulating in the GSM second stage agreement.The 8PSK modulation makes the transmittability of channel improve 3 times, can support the transmission of data service preferably.
See also accompanying drawing.
Fig. 1 is a system architecture diagram of the present invention, comprises digital modulation part 1, high speed D/A module (high-speed DAC) 2 and low pass filter 3.Wherein, digital modulation part 1 is integrated GMSK modulation and 8PSK modulation function, modulating data input signal and model selection control signal are treated in reception, export mutually orthogonal modulated digital I, Q component to high speed D/A 2, and support taking over seamlessly of two kinds of modulation systems; High speed D/A module 2 is finished the D/A conversion to digital modulation output, will simulate modulated output signal and deliver to low pass filter 3; Low pass filter 3 is finally exported mutually orthogonal modulated Simulation with I, Q component after finishing low-pass filtering.
Fig. 2 is digital modulation part of the present invention (structured flowchart of the digital modulation part of integrated GMSK modulation and 8PSK modulation function), and described digital modulation part comprises control signal generation module 11, GMSK modulation module 12,8PSK modulation module 13, clock generating module 14 and output selection module 15; Described control signal generation module 11 receiving modes are selected control signal; Generate two path control signal through the control signal generation module, the one road to clock generation module 14, and module 15 is selected to output in another road; The clock generating module is exported three road signals respectively, and one road clock selects module 15, one road GMSK clock to enable GMSK modulation module 12 to output, and another road 8PSK clock enables 8PSK modulation module 13; GMSK modulation module 12 and 8PSK modulation module 13 receive and treat modulating data simultaneously, respectively the GMSK clock in input enable, under the 8PSK clock enable signal control, treat modulating data and carry out modulation treatment, and export GMSK modulation I, Q component and 8PSK modulation I, Q component respectively and select module 15 to output, select module 15 to select by output then, export modulated digital I, Q component to high speed D/A 2.
Control signal generation module major function is the model selection control signal according to the outside input, generates the work that module is selected in control signal corresponding control clock generating module and output.By control, reach the purpose of saving power consumption: under GMSK modulation mode, 8PSK modulating part circuit is not worked to clock generating module; Under 8PSK modulation mode, the GMSK modulating part is not worked; Under the GMSK/8PSK switch mode, two parts circuit is worked simultaneously.By output being selected the control of module, finish output and select and switch operating: when working in GMSK modulation mode, control output select circuit output GMSK modulation result; When working in 8PSK modulation mode, control output select circuit output 8PSK modulation result; When working in the working method that GMSK/8PSK modulation switches by time slot, need select control signal, GMSK modulation output, 8PSK modulation output carry out corresponding delay process to output, carry out correct switching with the control output select circuit.
Clock generating module makes 8PSK clock enable signal remain low level under module works in GMSK modulation mode, and control 8PSK modulation module is not worked; When module works in 8PSK modulation mode, make GMSK clock enable signal remain low level, control GMSK module is not worked.Adopt this processing mode, can reach the effect that reduces power consumption.
Modulation processing section comprises GMSK modulation module and 8PSK modulation module, finishes modulation function.
Fig. 3 is a GMSK modulation module functional block diagram, and described GMSK modulation module 12 comprises GMSK table look-up address generation module 121, GMSK modulation table lookup operation module 122 and dateout processing module 123; Treat that modulating data is input to the GMSK address generation module 121 of tabling look-up, the generation address of tabling look-up, output to GMSK modulation table lookup operation module 122, finish the processing of tabling look-up, checking result outputs to dateout processing module 123, the dateout processing module is handled checking result, output GMSK modulation I, Q component.
Fig. 4 is a 8PSK modulation module functional block diagram.Described 8PSK modulation module 13 comprises 8PSK table look-up address generation module 131,8PSK modulation table lookup operation module 132, dateout processing module 133 and the summation output module 134 that adds up; Treat that the modulating data input signal is input to the 8PSK address generation module 131 of tabling look-up, generate the address of tabling look-up by table look-up address generation module of 8PSK, output to 8PSK modulation table lookup operation module 132, checking result outputs to dateout processing module 133, after add up summation back output 8PSK modulation I, Q component.
The present invention adopts above-mentioned base station baseband processor to realize the method that multiple modulation system is integrated, and can be in one of three kinds of working methods by the model selection control signal processor controls of outside input: GMSK modulation mode, 8PSK modulation mode, GMSK/8PSK modulate changeable mode.When processor worked in GMSK modulation mode, the circuit of 8PSK modulating part was not worked; When processor worked in 8PSK modulation mode, the circuit of GMSK modulating part was not worked; When processor works in GMSK/8PSK when modulating switchable mode, the circuit of GMSK modulation, 8PSK modulating part is all in running order;
May further comprise the steps:
A, base station baseband processor receive treating the modulating data input signal and being used for the model selection control signal of processor controls to the modulation system of input data from the outside input;
B, under the control of model selection control signal, the fixing GMSK modulation mode of selecting of base station baseband processor, or fixingly select 8PSK modulation mode, or between two kinds of modulation systems, take over seamlessly;
C, simultaneously treats that the digital signal of modulating data input is at first finished digital modulation according to the modulation system that chooses in processor inside, generates digital modulated signal;
D, digital modulated signal generate the simulation modulated signal after by digital-to-analogue conversion;
E, then by low pass filter, the interference signal beyond the filtering modulation band;
D, final output signal are the modulated analog signal that meets GMSK modulation or 8PSK modulation related protocol.
The present invention realizes that in digital modulation part its implementation is to the control of processor working state:
A, when processor works in GMSK modulation mode, make 8PSK clock enable signal remain low level, control 8PSK modulating part circuit is not worked, and simultaneously, fixingly selects GMSK modulation I, Q component output;
B, when processor works in 8PSK modulation mode, make GMSK clock enable signal remain low level, control GMSK modulating part circuit is not worked, and simultaneously, fixingly selects 8PSK modulation I, Q component output;
C, work in GMSK/8PSK when modulating switchable mode when processor, the GMSK clock enables, all normally output of 8PSK clock enable signal, GMSK modulating part circuit, 8PSK modulating part circuit are all in running order, simultaneously, select in output between GMSK modulation result (I, Q component) and 8PSK modulation result (I, Q component), to switch output under the control of control signal.
Owing between the adjacent GMSK modulation result certain correlation is arranged, simultaneously, between the adjacent 8PSK modulation result certain correlation is arranged also, therefore, strict control need be carried out, the integrality of output signal could be guaranteed to switch switching point, in processor, by output being selected control signal, GMSK modulation output, 8PSK modulation output carry out suitable sequential adjustment, guaranteed the correctness of switching point, thereby guaranteed to switch the integrality of output signal.Can guarantee switch correct, the complete switching of output signal and be called and take over seamlessly, therefore, processor can be realized taking over seamlessly between the modulation system.
The look-up table that GMSK modulation of the present invention adopts 8 multiplication of voltages to contract realizes that the summation of tabling look-up that the 8PSK modulation adopts 8 multiplication of voltages to contract realizes.
Export and select module that the certain time sequence adjustment is carried out in GMSK modulation and 8PSK modulation output, and, finish the output of GMSK modulation, 8PSK modulation result is selected, and can realize taking over seamlessly of different modulating mode according to exporting the effect of selecting control signal.
Fig. 5 has represented one embodiment of the present of invention---support the base station system block diagram of EDGE.Wherein: unit 51 is coding modules, finishes processing such as source encoding, chnnel coding, and the output binary system treats that modulated digital signal enters unit 52.Unit 52 is base station baseband processors that integrated GMSK modulates and 8PSK modulates that the present invention pays close attention to, the work of base station baseband processor is subjected to the control of model selection control signal, output GMSK modulation result or 8PSK modulation result, the output of modulation result can be switched by time slot; Unit 53 is intermediate frequency/radio-frequency modules, finishes the function of mixing and rf modulations.
Concrete implementation step is that system determines to adopt which kind of modulation system according to channel situation, by external control signal the work of modulating part is controlled, to finish the digital modulation function.
Claims (8)
1, a kind of integrated base station baseband processor of multiple modulation function, comprise Guassian Minimum Shift Keying GMSK modulation and 8 integrated two kinds of functions of phase-shift keying modulation mutually, this processor comprise that digital modulation part, high speed D/A are partly and the low pass filter part; Described digital modulation part receives and treats modulating data input signal and model selection control signal, exports mutually orthogonal modulated digital in-phase component and quadrature component to the high speed D/A; High speed D/A module is finished the D/A switch to digital modulation output, will simulate modulated output signal and deliver to low pass filter; Low pass filter is finally exported mutually orthogonal modulated analog in-phase component and quadrature component after finishing low-pass filtering;
It is characterized in that: described digital modulation part comprises control signal generation module, Guassian Minimum Shift Keying GMSK modulation module, 8 phase phase-shift keying modulation modules, clock generating module and output selection module; Described control signal generation module receiving mode is selected control signal; Generate two path control signal through the control signal generation module, the one road to the clock generation module, and module is selected to output in another road; The clock generating module is exported three road signals respectively, and one road clock is selected module to output, and one road Guassian Minimum Shift Keying GMSK clock enables the Guassian Minimum Shift Keying GMSK modulation module, and another road 8 phase phase-shift keying clocks enable 8 phase phase-shift keying modulation modules; Simultaneously the Guassian Minimum Shift Keying GMSK modulation module with 8 mutually the phase-shift keying modulation module receive and treat modulating data, respectively the Guassian Minimum Shift Keying GMSK clock in input enable, under the 8 phase phase-shift keying clock enable signals control, treat modulating data and carry out modulation treatment, and export Guassian Minimum Shift Keying GMSK modulation in-phase component respectively, phase-shift keying modulation in-phase component, quadrature component are selected module to output to quadrature component mutually with 8, select module to select by output then, export modulated digital in-phase component, quadrature component to the high speed D/A.
2, the integrated base station baseband processor of multiple modulation function according to claim 1 is characterized in that: described Guassian Minimum Shift Keying GMSK modulation module comprises Guassian Minimum Shift Keying GMSK table look-up address generation module, Guassian Minimum Shift Keying GMSK modulation table lookup operation module and dateout processing module; Treat that modulating data is input to the address generation module of tabling look-up, the generation address of tabling look-up, output to Guassian Minimum Shift Keying GMSK modulation table lookup operation module, finish the processing of tabling look-up, checking result outputs to the dateout processing module, the dateout processing module is handled checking result, output Guassian Minimum Shift Keying GMSK modulation in-phase component, quadrature component.
3, the integrated base station baseband processor of multiple modulation function according to claim 1 is characterized in that: described 8 phase phase-shift keying modulation modules comprise 8 phase phase-shift keyings table look-up address generation module, 8 phase phase-shift keyings modulation table lookup operation module, dateout processing module and the summation output module that adds up; Treat that the modulating data input signal is input to the 8 phase phase-shift keyings address generation module of tabling look-up, generate the address of tabling look-up by table look-up address generation module of 8 phase phase-shift keyings, output to 8 phase phase-shift keyings modulation table lookup operation module, checking result outputs to the dateout processing module, after add up summation back output 8PSK modulation in-phase component, quadrature component.
4, a kind of base station baseband processor is realized the method that multiple modulation system is integrated, and the model selection control signal processor controls of importing by the outside is in one of three kinds of working methods: changeable mode is modulated in Guassian Minimum Shift Keying GMSK modulation system, 8 phase phase-shift keying modulation systems, Guassian Minimum Shift Keying GMSK/8 phase phase-shift keyings; When processor worked in the Guassian Minimum Shift Keying GMSK modulation system, the circuit of 8 phase phase-shift keying modulating part was not worked; When processor worked in 8 phase phase-shift keying modulation systems, the circuit of Guassian Minimum Shift Keying GMSK modulating part was not worked; Guassian Minimum Shift Keying GMSK/when switchable mode was modulated in 8 phase phase-shift keyings, the circuit of Guassian Minimum Shift Keying GMSK modulation, 8 phase phase-shift keying modulating part was all in running order when processor works in;
It is characterized in that,, realize that in digital modulation part its implementation is the control of processor working state:
A, when processor works in the Guassian Minimum Shift Keying GMSK modulation system, make 8 phase phase-shift keying clock enable signals remain low level, control 8 phase phase-shift keying modulating part circuit and do not work, simultaneously, fixing Guassian Minimum Shift Keying GMSK modulation in-phase component, the quadrature component selected exported;
B, when processor works in 8 phase phase-shift keying modulation systems, make Guassian Minimum Shift Keying GMSK clock enable signal remain low level, control Guassian Minimum Shift Keying GMSK modulating part circuit is not worked, and simultaneously, fixing 8 phase phase-shift keyings modulation in-phase component, the quadrature component selected exported;
C, work in Guassian Minimum Shift Keying GMSK GMSK/8PSK when modulating switchable mode when processor, the Guassian Minimum Shift Keying GMSK clock enables, all normally output of 8 phase phase-shift keying clock enable signals, Guassian Minimum Shift Keying GMSK modulating part circuit, 8 phase phase-shift keying modulating part circuit are all in running order, simultaneously, select in output between Guassian Minimum Shift Keying GMSK modulation result and 8 phase phase-shift keying modulation result, to switch output under the control of control signal.
5, base station baseband processor according to claim 4 is realized multiple modulator approach, it is characterized in that it is by output being selected control signal, Guassian Minimum Shift Keying GMSK modulation output, 8 phase phase-shift keyings modulation output carry out the adjustment of suitable sequential respectively, realize when making it satisfy Guassian Minimum Shift Keying GMSK/8 phase phase-shift keyings modulation switching mode that described realization takes over seamlessly.
6, base station baseband processor according to claim 4 is realized multiple modulator approach, it is characterized in that, when digital modulation part is in the Guassian Minimum Shift Keying GMSK modulation system, 8 phase phase-shift keying modulation modules is not worked; When digital modulation part was in 8 phase phase-shift keying modulation systems, the Guassian Minimum Shift Keying GMSK modulation module was not worked.
7, base station baseband processor according to claim 4 is realized multiple modulator approach, it is characterized in that, the look-up table that described Guassian Minimum Shift Keying GMSK modulation adopts 8 multiplication of voltages to contract is realized.
8, base station baseband processor according to claim 4 is realized multiple modulator approach, it is characterized in that, the summation of tabling look-up that described 8 phase phase-shift keyings modulation adopts 8 multiplication of voltages to contract realizes.
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| EP1776816B1 (en) * | 2004-07-29 | 2008-11-19 | Nxp B.V. | Modulator with instantaneous modulation scheme switching in multi-time slot and multi-mode operation, for a wireless communication equipment |
| US7684779B2 (en) * | 2005-05-31 | 2010-03-23 | Broadcom Corporation | Wireless terminal baseband processor high speed turbo decoding module |
| CN101075833B (en) * | 2007-06-27 | 2011-11-30 | 中兴通讯股份有限公司 | Method and apparatus for controlling closed-loop power of GSM evolution scheme with data speed ratio enchancement |
| WO2012149758A1 (en) * | 2011-09-21 | 2012-11-08 | 华为技术有限公司 | Signal processing method and device |
| CN105376190B (en) * | 2014-07-31 | 2018-06-05 | 展讯通信（上海）有限公司 | The detection method of communication means and fixed frequency based on GMSK modulation |
| CN109709851B (en) * | 2018-12-25 | 2020-07-07 | 北京无线电计量测试研究所 | High-speed generation device and method for complex modulation signal |
| CN112769820B (en) * | 2021-01-06 | 2022-10-21 | 紫光展锐(重庆)科技有限公司 | Data compression method, device, equipment, storage medium, chip and module equipment |
| CN115134804A (en) * | 2022-05-18 | 2022-09-30 | 华为技术有限公司 | Baseband processing method and device |
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