CN201742513U - Wireless wideband communication equipment - Google Patents
Wireless wideband communication equipment Download PDFInfo
- Publication number
- CN201742513U CN201742513U CN2010202908761U CN201020290876U CN201742513U CN 201742513 U CN201742513 U CN 201742513U CN 2010202908761 U CN2010202908761 U CN 2010202908761U CN 201020290876 U CN201020290876 U CN 201020290876U CN 201742513 U CN201742513 U CN 201742513U
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- modulator
- demodulator
- unit
- communication equipment
- power amplifier
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Abstract
The utility model discloses wireless wideband communication equipment, which adopts the scheme that a multiplexer, an error correcting coding unit, a spreading code generator, a modulator, an exciter and a power amplifier unit are sequentially connected; at the same time, a low-noise amplifier, a demodulator, a despreading panel, an error control unit and a demultiplexer are sequentially connected; the modulator and the demodulator are respectively connected with a radio-frequency oscillator; and a filter is connected with the power amplifier unit or the low-noise amplifier through an T/R switch. By adopting the wireless wideband communication equipment provided by the utility model, the real-time synchronous transmission of video, voice, data and other wideband multimedia services in a high-speed mobile environment can be realized, and the equipment has the obvious advantages of wide coverage range, high sensitivity, good mobility, strong anti-jamming and anti-fading capabilities, high data transmission rate, outstanding stability and reliability, etc.
Description
Technical field
The utility model relates to a kind of equipment that is applied to real-time radio communication.
Background technology
Generally there is following problem in existing Wireless Telecom Equipment: the modulation and demodulation less stable of digital signal, and the availability of frequency spectrum is lower; Channel coding technology falls behind, and noise robustness is poor; Duplex mode adopts Frequency Division Duplexing (FDD) (FDD) pattern, needs to divide a pair of frequency and just can work, the waste frequency spectrum resource.
Summary of the invention
For solving the problem of above existence, the utility model provides a kind of WiMAX communication apparatus, and its technical scheme of taking is:
Multiplexer, error correction coding unit, spectrum-spreading code generator, modulator, exciter are connected successively with power amplifier unit, low noise amplifier, demodulator, despreading plate, error control unit are connected successively with coupler simultaneously, modulator and demodulator connects radio-frequency oscillator respectively, and filter can connect power amplifier unit or low noise amplifier by the T/R switch.
QPSK is adopted in modulation and demodulation of the present utility model, has good noise robustness, and can be applicable to the channel condition that has decline; 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.
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, for command, speedily carry out rescue work, emergency communication such as scouting provides at a distance, the ideal solution of high-quality, two-forty, wireless real-time Transmission.
Description of drawings
Accompanying drawing is a system block diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in the figure, multiplexer, error correction coding unit, spectrum-spreading code generator, modulator, exciter are connected successively with power amplifier unit, low noise amplifier, demodulator, despreading plate, error control unit are connected successively with coupler simultaneously, modulator and demodulator connects radio-frequency oscillator respectively, and filter can connect power amplifier unit or low noise amplifier by the T/R switch.
Making a start, multiplexer carries out asynchronous multiplexing by vision signal, voice signal (through the ADPCM coding) and the data-signal of corresponding interface circuits input, input error correction coding unit carries out error correction coding behind synthetic one road signal, the spreading code addition that produces with spectrum-spreading code generator forms and sends out a baseband signal again.Transmitter section will be modulated by modulator from the baseband signal of baseband board, and modulated signal is amplified to required transmitting power through exciter driving power amplifier.Finish TDD (time division duplex) work by the T/R switch, transmit by antenna through a band pass filter.The T/R control signal is sent to the T/R switch of transceiver simultaneously, finishes the TDD operation.
Receiver receives behind the square signal, sends into demodulator after amplifying through low noise amplifier and finishes the demodulation of QPSK signal, and warp let-off baseband board is handled after the recovery baseband signal.In receiving end, earlier receiving baseband signal is carried out de-spreading operation by the despreading plate, carry out the error control operation by the error control unit again, be sent to coupler at last, isolate vision signal, voice signal (ADPCM decoding), data-signal, the interface circuit by separately is sent to corresponding subordinate terminal equipment.
Claims (1)
1. WiMAX communication apparatus, it is characterized in that: multiplexer, error correction coding unit, spectrum-spreading code generator, modulator, exciter are connected successively with power amplifier unit, low noise amplifier, demodulator, despreading plate, error control unit are connected successively with coupler simultaneously, modulator and demodulator connects radio-frequency oscillator respectively, and filter can connect power amplifier unit or low noise amplifier by the T/R switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202908761U CN201742513U (en) | 2010-08-10 | 2010-08-10 | Wireless wideband communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202908761U CN201742513U (en) | 2010-08-10 | 2010-08-10 | Wireless wideband communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201742513U true CN201742513U (en) | 2011-02-09 |
Family
ID=43557792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202908761U Expired - Fee Related CN201742513U (en) | 2010-08-10 | 2010-08-10 | Wireless wideband communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201742513U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386939A (en) * | 2011-10-14 | 2012-03-21 | 航天恒星科技有限公司 | Double-antenna changing verifying and signal receiving device and realizing method thereof |
| CN106357320A (en) * | 2015-07-16 | 2017-01-25 | 中兴通讯股份有限公司 | Satellite ground station transceiver and satellite communication system |
-
2010
- 2010-08-10 CN CN2010202908761U patent/CN201742513U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386939A (en) * | 2011-10-14 | 2012-03-21 | 航天恒星科技有限公司 | Double-antenna changing verifying and signal receiving device and realizing method thereof |
| CN106357320A (en) * | 2015-07-16 | 2017-01-25 | 中兴通讯股份有限公司 | Satellite ground station transceiver and satellite communication system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20110810 |