CN102892127A - Simulating apparatus and method for receiving 2 frequency shift keying (2fsk) data by simulating global system for mobile communications (GSM) channel - Google Patents
Simulating apparatus and method for receiving 2 frequency shift keying (2fsk) data by simulating global system for mobile communications (GSM) channel Download PDFInfo
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- CN102892127A CN102892127A CN2012103492507A CN201210349250A CN102892127A CN 102892127 A CN102892127 A CN 102892127A CN 2012103492507 A CN2012103492507 A CN 2012103492507A CN 201210349250 A CN201210349250 A CN 201210349250A CN 102892127 A CN102892127 A CN 102892127A
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Abstract
The invention discloses a simulating apparatus for receiving 2 frequency shift keying (2fsk) data by a simulating global system for mobile communications (GSM) channel, which comprises a random data sending module, a GSM voice demodulating module, a 2fsk demodulating module, a 2fsk parameter setting module, a data storing module and a data comparing module; furthermore, the invention discloses a simulating method for receiving 2 frequency shift keying (2fsk) data by the simulating GSM channel, which comprises the steps of: 1, starting the 2fsk parameter setting module; 2, starting the data comparing module; 3, starting the data storing module; 4, starting the 2fsk demodulating module; 5, starting the GSM voice demodulating module; 6, starting the random data generating module; and 7, comparing an inputted digital signal by the data comparing module, and outputting an error code rate. Through the simulating apparatus and method for receiving the 2fsk data by the GSM channel, the design speed is accelerated and the research cost is reduced, and performance optimization and statistics become convenient; and the modulating technology is constantly improved and the error code rate is recorded to determine an optimal modulating parameter.
Description
Technical field
The present invention relates to a kind of emulation receives the 2fsk data with the GSM channel simulator and method.
Background technology
GSM is the abbreviation of Global System For Mobile Communications.A digital mobile communication standard by the ETSI of ETSI formulation.GSM is the abbreviation of global system for mobile communications (Global System for Mobile communications).Its air interface adopts tdma.Since the mid-90 puts it into commercial operation, surpassed 100 countries by the whole world and adopted.The equipment of GSM standard occupies Present Global cellular mobile communication equipment Market more than 80%.
Because instructions for use needs to use the channel of GSM voice call to carry out transfer of data.Embodiment is the voice data that data-signal is arranged in the microphone circuit input of mobile phone access modulation, picks out demodulating equipment in the handset circuitry output termination of mobile phone, and this demodulating equipment can demodulate voice channel and pass the data-signal of coming.2fsk is Binary Frequency Shift Keying, transmit exactly a kind of information transmitting methods of digital massage with the frequency of carrier wave, namely use the frequency of the digital massage control carrier wave that transmits, this method conversion speed is fast, waveform good, stability is high and be easy to realization, so be widely used.When carrying out transfer of data, the channel of GSM voice call also can use the 2fsk modulated data signal, but to early stage of using GSM transmission 2fsk data message in the design process, need to scientifically the try one's best parameter of optimized design voice communication avoids the later stage to change continually circuit hardware design and parameter setting.
Summary of the invention
For reducing GSM is received the circuit design of 2fsk data and the later stage work time of parameter adjustment, the invention provides a kind of emulation receives the 2fsk data with the GSM channel simulator and method.
The invention provides a kind of emulation with the simulator of GSM channel reception 2fsk data, comprise that random data sending module, GSM voice demodulation module, 2fsk demodulation module, 2fsk parameter arrange module, data memory module and data comparison module;
Random data sending module: be connected with data memory module with GSM voice demodulation module, the digital signal that generation comprises random data information sends to data memory module, and the digital signal that produces is converted into the GSM voice signal sends to GSM voice demodulation module;
GSM voice demodulation module: be connected with the 2fsk demodulation module with the random data sending module, the GSM voice signal that the random data sending module is sent is converted into the 2fsk analog signal and sends to the 2fsk demodulation module;
2fsk demodulation module: be connected with data memory module, the 2fsk analog signal of accepting be converted into digital signal send to data memory module;
The 2fsk parameter arranges module: be connected with the 2fsk demodulation module, the demodulation parameter of 2fsk is set;
Data memory module: the digital signal that storage 2fsk demodulation module sends also sends to data comparison module;
Data comparison module: the digital signal of random data sending module transmission and the digital signal of data memory module transmission are compared, calculate the error rate.
Preferably, the 2fsk parameter arranges module and also comprises input terminal, and the user is by input terminal input 2fsk modulation parameter.
Concrete, the random data sending module also comprises 2fsk modulation module and GSM voice modulation module, the digital signal that produces at random is converted into first the 2fsk analog signal by the 2fsk modulation module, is converted into the GSM voice information signal by GSM voice modulation module again.
The invention still further relates to a kind of emulation with the emulation mode of GSM channel reception 2fsk data, comprise the steps:
Step 1. starts the 2fsk parameter module is set, and the 2fsk parameter is set;
Step 2. log-on data comparison module if there is not the data input, does not then carry out data relatively;
Step 3. log-on data memory module;
Step 4. starts the 2fsk demodulation module, if do not receive the 2fsk analog signal, then is output as zero;
Step 5. starts GSM voice demodulation module;
Step 6. starts the random data generation module, begins to produce random data, output digit signals and GSM voice signal;
The digital signal that step 7. data comparison module is relatively inputted, output error rate.
Concrete, described step 6 also comprised the modulation step to the digital signal that produces at random before output GSM voice signal:
Step 61. is converted into the 2fsk analog signal with digital signal;
Step 62. is converted into the GSM voice signal with the 2fsk analog signal.
Concrete, it is characterized in that: described each step is utilized the realization of programming on computers of MATLAB language.
Adopt of the present invention to receive simulator and the method for 2fsk data with the GSM channel, realized using the GSM voice channel to receive the emulation of 2fsk analog signal process, and calculate the error rate of signal, can conveniently change the implementation of hardware circuit and simulate rapidly the result by parameter setting.Accelerated desin speed, reduced R﹠D costs, simultaneously convenient function optimization and statistics by modulation technique is constantly improved and the record error rate, are determined optimum modulation parameter.
Description of drawings
Fig. 1 illustrates emulation of the present invention receives the 2fsk data with the GSM channel simulator each several part annexation schematic diagram;
Fig. 2 illustrates emulation of the present invention receives the emulation mode of 2fsk data with the GSM channel step schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
The invention provides a kind of emulation with the simulator of GSM channel reception 2fsk data, comprise that random data sending module, GSM voice demodulation module, 2fsk demodulation module, 2fsk parameter arrange module, data memory module and data comparison module;
Random data sending module: be connected with data memory module with GSM voice demodulation module, the digital signal that generation comprises random data information sends to data memory module, and the digital signal that produces is converted into the GSM voice signal sends to GSM voice demodulation module;
GSM voice demodulation module: be connected with the 2fsk demodulation module with the random data sending module, the GSM voice signal that the random data sending module is sent is converted into the 2fsk analog signal and sends to the 2fsk demodulation module;
2fsk demodulation module: be connected with data memory module, the 2fsk analog signal of accepting be converted into digital signal send to data memory module;
The 2fsk parameter arranges module: be connected with the 2fsk demodulation module, the demodulation parameter of 2fsk is set;
Data memory module: the digital signal that storage 2fsk demodulation module sends also sends to data comparison module;
Data comparison module: the digital signal of random data sending module transmission and the digital signal of data memory module transmission are compared, calculate the error rate.
The effect of random data sending module is to produce the random data that the user will send, the digital signal data memory module that comprises this random data.Issue the 2fsk modulation module and
Wherein, the workflow of random data sending module is:
(1) produces the random data that the user that is used for emulation will send by the temporal frequency of setting after powering on;
(2) in certain moment the digital signal that comprises random data is sent to data memory module; And this digital signal is converted into the GSM voice signal sends to GSM voice demodulation module;
(3) regenerate the random data that the user for emulation will send;
(4) repeating step (2)
The effect of GSM voice demodulation module is the GSM voice signal of receiving to be demodulated to the 2fsk analog signal send to the 2fsk demodulation module.
The workflow of GSM voice demodulation module is:
(1) the GSM voice signal of receiving;
(2) the GSM voice signal is demodulated to the 2fsk analog signal;
(3) the 2fsk analog signal is sent to the 2fsk demodulation module.
The effect of 2fsk demodulation module is the 2fsk analog signal of receiving, this 2fsk analog signal is demodulated to numerical data, offers data memory module.
The workflow of 2fsk demodulation module is:
(1) receives the 2fsk analog signal that GSM voice demodulation module sends;
(2) the 2fsk analog signal is demodulated to numerical data;
(3) offer data memory module.
The effect that the 2fsk parameter arranges module is that customer parameter arranges the interface, and the 2fsk demodulation parameter is offered the 2fsk demodulation module.
The workflow that the 2fsk parameter arranges module is:
(1) receives the customer parameter that customer parameter arranges the interface;
(2) customer parameter is offered the 2fsk demodulation module.
The effect of data memory module is the user data that receives of record, and these data are recorded in the file, provides corresponding file to other modules usefulness of making comparisons, and offers the user data comparison module.
The workflow of data memory module is:
(1) receives the data that the user data generation module sends;
(2) in the internal memory of the file record of receiving;
(3) in the file of the file record of receiving;
(4) provide data-interface to use to other modules.
The effect of data comparison module is the data of relatively receiving and sends front data, calculates the error rate and other statisticss.
The workflow of data comparison module is:
(1) receives the numerical data that the random data sending module sends;
(2) data received from the 2fsk demodulation module of receive data memory module;
(3) calculate the error rate;
(4) calculate other statisticss that the user sets.
Preferably, the 2fsk parameter arranges module and also comprises input terminal, and the user is by input terminal input 2fsk modulation parameter.
Concrete, the random data sending module also comprises 2fsk modulation module and GSM voice modulation module, the digital signal that produces at random is converted into first the 2fsk analog signal by the 2fsk modulation module, is converted into the GSM voice information signal by GSM voice modulation module again.
The invention still further relates to a kind of emulation with the emulation mode of GSM channel reception 2fsk data, comprise the steps:
Step 1. starts the 2fsk parameter module is set, and the 2fsk parameter is set;
Step 2. log-on data comparison module if there is not the data input, does not then carry out data relatively;
Step 3. log-on data memory module;
Step 4. starts the 2fsk demodulation module, if do not receive the 2fsk analog signal, then is output as zero;
Step 5. starts GSM voice demodulation module;
Step 6. starts the random data generation module, begins to produce random data, output digit signals and GSM voice signal;
The digital signal that step 7. data comparison module is relatively inputted, output error rate.
Concrete, described step 6 also comprised the modulation step to the digital signal that produces at random before output GSM voice signal:
Step 61. is converted into the 2fsk analog signal with digital signal;
Step 62. is converted into the GSM voice signal with the 2fsk analog signal.
Concrete, it is characterized in that: described each step is utilized the realization of programming on computers of MATLAB language.
MATLAB is main in the face of science is calculated, the high-tech computing environment of visual and programming of interactive by U.S. mathworks company issue.It with numerical analysis, matrix computations, science data are visual and many powers such as modeling and simulation of nonlinear dynamic system are integrated in the wieldy windowing environment.MATLAB is simple and easy to usefulness, and disposal ability is strong.
Adopt of the present invention to receive simulator and the method for 2fsk data with the GSM channel, realized using the GSM voice channel to receive the emulation of 2fsk analog signal process, and calculate the error rate of signal, can conveniently change the implementation of hardware circuit and simulate rapidly the result by parameter setting.Accelerated desin speed, reduced R﹠D costs, simultaneously convenient function optimization and statistics by modulation technique is constantly improved and the record error rate, are determined optimum modulation parameter.
Previously described is each preferred embodiment of the present invention; design parameter among described embodiment and the embodiment only is the invention proof procedure for clear statement inventor; be not to limit scope of patent protection of the present invention; scope of patent protection of the present invention still is as the criterion with its claims; the equivalent structure that every utilization specification of the present invention and accompanying drawing content are done changes, and in like manner all should be included in protection scope of the present invention.
Claims (6)
1. an emulation uses the GSM channel to receive the simulator of 2fsk data, comprises that random data sending module, GSM voice demodulation module, 2fsk demodulation module, 2fsk parameter arrange module, data memory module and data comparison module;
Random data sending module: be connected with data memory module with GSM voice demodulation module, the digital signal that generation comprises random data information sends to data memory module, and the digital signal that produces is converted into the GSM voice signal sends to GSM voice demodulation module;
GSM voice demodulation module: be connected with the 2fsk demodulation module with the random data sending module, the GSM voice signal that the random data sending module is sent is converted into the 2fsk analog signal and sends to the 2fsk demodulation module;
2fsk demodulation module: be connected with data memory module, the 2fsk analog signal of accepting be converted into digital signal send to data memory module;
The 2fsk parameter arranges module: be connected with the 2fsk demodulation module, the demodulation parameter of 2fsk is set;
Data memory module: the digital signal that storage 2fsk demodulation module sends also sends to data comparison module;
Data comparison module: the digital signal of random data sending module transmission and the digital signal of data memory module transmission are compared, calculate the error rate.
2. emulation uses the GSM channel to receive the simulator of 2fsk data as claimed in claim 1, and it is characterized in that: described 2fsk parameter arranges module and also comprises input terminal, and the user is by input terminal input 2fsk modulation parameter.
3. emulation uses the GSM channel to receive the simulator of 2fsk data as claimed in claim 1, it is characterized in that: described random data sending module also comprises 2fsk modulation module and GSM voice modulation module, the digital signal that produces at random is converted into first the 2fsk analog signal by the 2fsk modulation module, is converted into the GSM voice information signal by GSM voice modulation module again.
4. an emulation uses the GSM channel to receive the emulation mode of 2fsk data, comprises the steps:
Step 1. starts the 2fsk parameter module is set, and the 2fsk parameter is set;
Step 2. log-on data comparison module if there is not the data input, does not then carry out data relatively;
Step 3. log-on data memory module;
Step 4. starts the 2fsk demodulation module, if do not receive the 2fsk analog signal, then is output as zero;
Step 5. starts GSM voice demodulation module;
Step 6. starts the random data generation module, begins to produce random data, output digit signals and GSM voice signal;
The digital signal that step 7. data comparison module is relatively inputted, output error rate.
5. an emulation as claimed in claim 4 uses the GSM channel to receive the emulation mode of 2fsk data, it is characterized in that: described step 6 also comprised the modulation step to the digital signal that produces at random before output GSM voice signal:
Step 61. is converted into the 2fsk analog signal with digital signal;
Step 62. is converted into the GSM voice signal with the 2fsk analog signal.
6. one kind receives the emulation mode of 2fsk data such as claim 4 or 5 described emulation with the GSM channels, it is characterized in that: described each step is utilized the realization of programming on computers of MATLAB language.
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Citations (3)
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|---|---|---|---|---|
| CN1866941A (en) * | 2005-12-12 | 2006-11-22 | 傅岳 | Modulation/demodulation process and apparatus for transmitting data with PSTN channel using GSM voice channel |
| CN101794370A (en) * | 2010-04-09 | 2010-08-04 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN102075470A (en) * | 2011-01-13 | 2011-05-25 | 清华大学 | (Gauss) frequency shift keying ((G)FSK) digital demodulation device and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866941A (en) * | 2005-12-12 | 2006-11-22 | 傅岳 | Modulation/demodulation process and apparatus for transmitting data with PSTN channel using GSM voice channel |
| CN101794370A (en) * | 2010-04-09 | 2010-08-04 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN102075470A (en) * | 2011-01-13 | 2011-05-25 | 清华大学 | (Gauss) frequency shift keying ((G)FSK) digital demodulation device and method |
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