CN202309695U - Wireless communication equipment - Google Patents
Wireless communication equipment Download PDFInfo
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- CN202309695U CN202309695U CN2011204430551U CN201120443055U CN202309695U CN 202309695 U CN202309695 U CN 202309695U CN 2011204430551 U CN2011204430551 U CN 2011204430551U CN 201120443055 U CN201120443055 U CN 201120443055U CN 202309695 U CN202309695 U CN 202309695U
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- modulator
- demodulator
- power amplifier
- wireless communication
- communication equipment
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Abstract
The utility model relates to wireless communication equipment which comprises a multiplexer, a high-performance error-correcting code encoding module, a spread-spectrum code generator, a modulator, an exciter, a power amplifier circuit, a demodulator, a despreading board, an error control module and a demultiplexer, wherein the multiplexer, the high-performance error-correcting code encoding module, the spread-spectrum code generator, the modulator, the exciter and the power amplifier circuit are respectively connected with one another in sequence; the demodulator, the despreading board, the error control module and the demultiplexer are connected with one another in sequence; the modulator and the demodulator are respectively connected with a radio frequency oscillator; and the power amplifier circuit is connected with the filter through a T/R (Transmitting/receiving) switch. The wireless communication equipment has the beneficial effects that real-time and synchronous transmission of video, voice, data and other broadband multimedia services can be realized under the high-speed mobile environment; and the wireless communication equipment has the obvious advantages of wide coverage area, strong anti-interferences and anti-fading capacities, high data transmission rate, outstanding stability and reliability and the like. In the wireless communication equipment, a duplex mode adopts a TDD (Time Division Duplex) mode, so that valuable frequency spectrum resources are saved.
Description
Technical field
The utility model relates to communication field, especially relates to a kind of wireless telecommunications system.
Background technology
In wireless telecommunication system, the wireless telecommunications system within the cell coverage area communicates through electromagnetic wave.In the spectral range of distributing to wireless telecommunications system or frequency spectrum broadband, can be divided into different carrier frequency, thereby produce the communication channel of different frequency.In the general networking, generally there is following problem at present: the modulation and demodulation less stable of digital signal, the availability of frequency spectrum is lower; Channel coding technology falls behind, and noise robustness is poor; Duplex mode adopts FDD (FDD) pattern, needs to divide a pair of frequency and just can work, the waste frequency spectrum resource.
Summary of the invention
The utility model purpose provides a kind of wireless telecommunications system.Technical problems such as prior art digital signal less stable, the availability of frequency spectrum are lower to solve, noise robustness difference.
For solving the problems of the technologies described above; The technical scheme that the utility model adopted is: a kind of wireless telecommunications system comprises multiplexer, high-performance error correction code coding module, spectrum-spreading code generator, modulator, exciter, power amplifier, demodulator, despreading plate, Error Control module and coupler; Said multiplexer, high-performance error correction code coding module, spectrum-spreading code generator, modulator, exciter, power amplifier connect successively; Said demodulator, despreading plate, Error Control module are connected with coupler successively; Said modulator and demodulator is connected with radio-frequency oscillator respectively, and said power amplifier is connected through the T/R switch with filter.
As preferably, said modulator and demodulator adopt have high spectrum utilization, the OQPSK (offset quadraphase shift keying) of strong anti-interference, noise robustness, this OQPSK is applicable to the channel condition that has decline.
The utility model can be realized real-time, the synchronous transmission of broadband multimedia services such as video, voice, data under high-speed mobile environment; Have wide coverage, highly sensitive, remarkable advantage such as mobility good, anti-interference and anti-fading ability is strong, transmission data rate is high, stability and reliability are outstanding; And further improving the antinoise and the anti fading performance of system, the receiving sensitivity that increases system and communication distance are the ideal solution of commanding, speedily carrying out rescue work, emergency communication such as scouting providing at a distance, high-quality, two-forty, wireless real-time transmit.The utility model duplex mode adopts time division duplex (TDD) pattern, sends and reception is that different time-gap at same frequency channels (carrier wave) carries out, but the frequency spectrum resource of saves valuable.
Description of drawings
Fig. 1 is the system block diagram of the utility model.
Embodiment
Below through embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Fig. 1 is the system block diagram of the utility model; Can know by Fig. 1; The utility model provides a kind of wireless telecommunications system, comprises multiplexer, high-performance error correction code coding module, spectrum-spreading code generator, modulator, exciter, power amplifier, demodulator, despreading plate, Error Control module and coupler; Said multiplexer, high-performance error correction code coding module, spectrum-spreading code generator, modulator, exciter, power amplifier connect successively; Said demodulator, despreading plate, Error Control module are connected with coupler successively; Said modulator and demodulator is connected with radio-frequency oscillator respectively, and said power amplifier is connected through the T/R switch with filter.
OQPSK (offset quadraphase shift keying (offset-QPSK) is adopted in the modulation and demodulation of the utility model; It has the higher availability of frequency spectrum, stronger anti-interference, noise robustness, it is also comparatively simple on circuit, to realize, and can be applicable to the channel condition that has decline; Said chnnel coding is used Turbo code, can further improve the antinoise and the anti fading performance of system, increases the receiving sensitivity and the communication distance of system; Duplex mode adopts time division duplex (TDD) pattern, sends and reception is that different time-gap at same frequency channels (carrier wave) carries out, but the frequency spectrum resource of saves valuable.
Multiplexer is equivalent to a switch in front end system, it is responsible for a plurality of MPTS are changed and MPTS of compound generation.Multiplexer carries out asynchronous multiplexing through vision signal, voice signal and the data-signal of corresponding interface circuits input; Input error correction coding module is carried out error correction coding behind synthetic one road signal; The spreading code addition that produces with spectrum-spreading code generator again forms and sends out a baseband signal.Transmitter section will be modulated through modulator from the baseband signal of baseband board, and modulated signal is amplified to required transmitting power through exciter driving power amplifier.Accomplish time division duplex (TDD) work through the T/R switch, transmit through antenna through a band pass filter.The T/R control signal is sent to the T/R switch of transceiver simultaneously, accomplishes the TDD operation.
Receiver receives behind the square signal; Receiving end; Earlier receiving baseband signal is carried out de-spreading operation through the despreading plate, carry out the error control operation through the error control unit again, be sent to coupler at last; Isolate vision signal, voice signal (ADPCM decoding), data-signal, the interface circuit through separately is sent to corresponding subordinate terminal equipment.
Claims (2)
1. a wireless telecommunications system comprises multiplexer, high-performance error correction code coding module, spectrum-spreading code generator, modulator, exciter, power amplifier, demodulator, despreading plate, Error Control module and coupler; It is characterized in that said multiplexer, high-performance error correction code coding module, spectrum-spreading code generator, modulator, exciter, power amplifier connect successively; Said demodulator, despreading plate, Error Control module are connected with coupler successively; Said modulator and demodulator is connected with radio-frequency oscillator respectively, and said power amplifier is connected through the T/R switch with filter.
2. a kind of wireless telecommunications system according to claim 1 is characterized in that, said modulator and demodulator employing has the OQPSK of high spectrum utilization, strong anti-interference, noise robustness, and this OQPSK is applicable to the channel condition that has decline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204430551U CN202309695U (en) | 2011-11-10 | 2011-11-10 | Wireless communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204430551U CN202309695U (en) | 2011-11-10 | 2011-11-10 | Wireless communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309695U true CN202309695U (en) | 2012-07-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204430551U Expired - Fee Related CN202309695U (en) | 2011-11-10 | 2011-11-10 | Wireless communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309695U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888166A (en) * | 2013-11-20 | 2014-06-25 | 中国电子科技集团公司第五十四研究所 | Co-spectrum transmission modulation and demodulation device for scatter communication |
-
2011
- 2011-11-10 CN CN2011204430551U patent/CN202309695U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888166A (en) * | 2013-11-20 | 2014-06-25 | 中国电子科技集团公司第五十四研究所 | Co-spectrum transmission modulation and demodulation device for scatter communication |
| CN103888166B (en) * | 2013-11-20 | 2015-11-11 | 中国电子科技集团公司第五十四研究所 | Transmission modulation-demodulation device is composed in scatter communication altogether |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20141110 |
|
| EXPY | Termination of patent right or utility model |