CN201303345Y - Co-channel duplex wireless digital communication device - Google Patents
Co-channel duplex wireless digital communication device Download PDFInfo
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- CN201303345Y CN201303345Y CNU2008202229689U CN200820222968U CN201303345Y CN 201303345 Y CN201303345 Y CN 201303345Y CN U2008202229689 U CNU2008202229689 U CN U2008202229689U CN 200820222968 U CN200820222968 U CN 200820222968U CN 201303345 Y CN201303345 Y CN 201303345Y
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Abstract
The utility model is applicable to the wireless communication field and provides a co-channel duplex wireless digital communication device which comprises a modulation and demodulation unit which adopts OFDM and DMA technique to modulate baseband signals and to output intermediate frequency signals, and demodulates the received intermediate frequency signals, an upper frequency conversion unit which converts the intermediate frequency signals which are output by the modulation and demodulation unit into radio frequency signals, a power amplification unit which amplifies the power of the radio frequency signals which are output by the upper frequency conversion unit, an antenna which sends the radio frequency signals and receives the radio frequency signals, an insulating unit which is used to insulate the received radio frequency signals and the sent radio frequency signals, a filter which is used to filter the radio frequency signals which are output by the insulating unit, an AGC amplification unit which is used to amplify the radio frequency signals which are output by the filter, a lower frequency conversion unit which is used to covert the radio frequency signals which are output by the AGC amplification unit into intermediate frequency signals, and a low noise amplifier which is used to amplify the intermediate frequency signals which are output by the lower frequency conversion unit and provides input elective level for the demodulation of the modulation and demodulation unit.
Description
Technical field
The utility model belongs to wireless communication field, relates in particular to a kind of with frequency duplex wireless digital communication equipment.
Background technology
Present radio digital communication technology adopts single-carrier technology mostly, as code division multiple access (CDMA) technology, but continuous expansion along with user's request and product demand, existing radio digital communication technology can only be by taking more radio frequency resources to satisfy this increased requirement, and it is lower to the utilance of the wireless frequency that taken, under current wireless electricity frequency resource background in short supply day by day, existing this radio digital communication technology can't satisfy the needs of the development in society and market.
The utility model content
The purpose of this utility model is: a kind of duplex wireless of frequency together digital communication equipment is provided, and it is low to the radio frequency resources utilance to be intended to solve existing radio digital communication technology, can't satisfy the problem of the demand of user's development.
The purpose of this utility model is achieved in that
A kind of with frequency duplex wireless digital communication equipment, described equipment comprises:
Adopt OFDM (OFDM) and baseband signal is modulated and exported intermediate-freuqncy signal, and the intermediate-freuqncy signal that receives is carried out the modem module of demodulation output baseband signal with (DMA) technology of sharing frequently;
The intermediate-freuqncy signal of described modem module output is become the up-conversion unit of radiofrequency signal and output;
The power amplifier unit that the power amplification of the radiofrequency signal of described up-conversion unit output is exported to the default radiant power;
Send radiofrequency signal to machine, reach the antenna that receives the radiofrequency signal of machine;
With the radio signal transmission of described power amplifier unit output to described antenna, and the radiofrequency signal output that antenna is received, and the isolated location that the radiofrequency signal of sending and receiving is isolated;
Radiofrequency signal to described isolated location output is carried out filter filtering;
The radiofrequency signal of described filter output is amplified the AGC amplifying unit of back output;
The radiofrequency signal of described AGC amplifying unit output is become the down-converter unit of intermediate-freuqncy signal and output; And
By the intermediate-freuqncy signal of described down-converter unit output is amplified, provide the low noise amplifier of the incoming level that amplitude meets the demands for the demodulation of described modem module;
Described up-conversion unit provides the level of drive for described power amplifier unit.
Described modem module in modulating/demodulating, also will export lock-out pulse in order to the transmitting-receiving conversion of control complete machine to described up-conversion unit, power amplifier unit, isolated location, AGC amplifying unit and down-converter unit.
Described isolated location is specially circulator.
Described modem module also is used at the dynamic channel quality of modulating/demodulating process basis, and the modulation footing is selected on automatic dynamic ground.
The bandwidth range of described modem module base band signal modulated is 0.1-49Mbps, and the wireless frequency bandwidth that takies is 0.45Mhz-5Mhz.
The solomon code of error correction before and after described modem module also is used for adding when modulation.
Described AGC amplifying unit also is used to utilize automatic gain control (AGC) circuit to cooperate amplifying circuit to provide stable entry level for described down-converter unit.
Described modem module adopts the 1024QAM modulation system, possesses the parallel 2048 subcarrier transmission performances of OFDM.
Outstanding advantage of the present utility model is: the utility model carries out modulating/demodulating by adopting OFDM and DMA technology to digital signals such as image, sound, thereby can satisfy multi-user's non line of sight, the communication need of two-forty in very narrow bandwidth range.
Description of drawings
Fig. 1 is the structure chart of the same frequency duplex wireless digital communication equipment that provides of the utility model.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The same frequency duplex wireless digital communication equipment that the utility model provides is by adopting OFDM (Orthogonal Frequency Division Multiplexing, OFDM) and with sharing (DMA) technology frequently digital signals such as image, sound are carried out modulating/demodulating, thereby can in very narrow bandwidth range, can satisfy multi-user's non line of sight, the communication need of two-forty.
Fig. 1 shows the structure of the same frequency duplex wireless digital communication equipment that the utility model provides, and for convenience of explanation, only shows the part relevant with the utility model, and these parts can be the unit of hardware or software and hardware combining.
In transmission channel, modem module 11 is with the baseband signal code division multiple access of 0.1-49Mbps, be modulated on 1665 mutually orthogonal subcarriers, the code flow that each subcarrier carries is in 30kbps, thereby can overcome the multipath that brings in wireless transmission well disturbs and Doppler effect, and all add the solomon code that is used for error correction in when modulation in the front and back of each OFDM symbol, be lower than 10 with the error rate in guaranteeing to transmit
-7
The supreme converter unit 12 of modem module 11 modulation back output one intermediate frequency modulated signals, up-conversion unit 12 is converted to this intermediate-freuqncy signal on the required frequency of default user, provide the level of drive for the high Linear Power Amplifier of numeral unit 13 simultaneously, power amplifier unit 13 provides radiant power with the radiofrequency signal of up-conversion unit 12 outputs by default user's request, radiofrequency signal behind power amplifier transfers to antenna 15 by isolated location 14, is sent to machine by antenna 15 again.
In receive path, antenna 15 receives transfers to path filter 16 to the machine signal through isolated location 14 and carries out filtering, to improve interference free performance, AGC amplifying unit 17 amplifies the signal of filter 16 outputs, and utilizes automatic gain control (AGC) circuit to cooperate amplifying circuit to provide a stable entry level for down-converter unit 18.Down-converter unit 18 becomes intermediate-freuqncy signal with the radiofrequency signal of input, amplify by 19 pairs of these intermediate-freuqncy signals of low noise amplifier, thereby for modem module 11 is separated the incoming level that timing provides amplitude to meet the demands, low noise amplifier 19 can also be isolated and be suppressed the noise that down-converter unit 18 is brought simultaneously.
11 pairs of intermediate-freuqncy signals of modem module are carried out demodulation, and described demodulating process is the reverse computing of modulation, and by separating error correcting code, rectification, restore data stream is exported baseband signal at last.
Above-mentioned isolated location 14 is used to isolate the sending and receiving radiofrequency signal, and in the utility model, this isolated location 14 adopts circulator to realize.
In the utility model, above-mentioned modem module 11 adopts the 1024QAM modulation system, possess the parallel 2048 subcarrier transmission performances of OFDM, and can be in the modulating/demodulating process according to dynamic channel quality, be the transmission rate of baseband signal, the modulation footing is selected on automatic dynamic ground, for example, when speed is 8Mbps, select 4QAM (quadrature amplitude modulation) modulation for use; When speed is 12Mbps, select the 16QAM modulation for use; When speed is 21Mbps, select the 32QAM modulation for use; When speed is 36Mbps, select the 64QAM modulation for use; When speed is 39Mbps, select the 256QAM modulation for use; Deng.
The utility model is by adopting OFDM and DMA technology, different user can be worked under same frequency simultaneously, and the two-way reciprocity full duplex transmission of realization 3Mbps to 49Mbps Ethernet data, thereby the radio wave resource that only need take 0.45Mhz to 5Mhz bandwidth is done transmission medium, can satisfy the number of users and the product quantity demand of continuous development, solved at limited radio resource and shared, the contradiction barrier that big information is transmitted is effectively saved radio resource.
In addition, the same frequency duplex wireless digital communication equipment that the utility model provides also has superpower diffraction ability to communicate, with than forceful electric power absciss layer reflection ability to communicate: in the road environment that city high rise building stands in great numbers, both sides bear when using, and communication distance can reach 5 kilometers; In the road environment that city high rise building stands in great numbers, the Party A bears use, and when the Party B had geographical height above sea level or roof commanding elevation to use, communication distance can reach about 10 kilometers; In the open smooth road environment in rural area, both sides bear when using, and communication distance can reach about 8 kilometers; In the road environment in mountain area, both sides bear when using short-wave band, and communication distance can reach about 1200 kilometers; In the road environment that city high rise building stands in great numbers, the both sides Party A is vehicle-mounted use, and when the Party B had geographical height above sea level or roof commanding elevation to use, communication distance can reach about 100 kilometers; In the road environment that city high rise building stands in great numbers, when both sides were vehicle-mounted use short-wave bands, communication distance can reach about 3000 kilometers.
Owing to adopting the flicker transmit-receive technology, the utility model can not help gathering the OFDM technology and resist time domain delay and the Doppler effect that high-speed mobile is brought jointly not causing serious interference with other communication tools frequently.
The same frequency duplex wireless digital communication equipment that the utility model provides is in place that abominable geographical conditions, dangerous environment and large quantities of personnel can not arrive, can reach the spot with personnel or mobile object and real-time Transmission bidirectional picture, speech and ethernet ip protocol data with form vehicle-mounted or airborne or that bear, have maneuverability, installation and transportation characteristics easily, assist a plurality of fields such as eliminating, oil mining all vast application space will be arranged at news interview, traffic accident disposal, the scouting of marine site, spatial domain, police criminal detection, explosive.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (8)
1, a kind of with frequency duplex wireless digital communication equipment, it is characterized in that described equipment comprises:
Adopt OFDM (OFDM) and baseband signal is modulated and exported intermediate-freuqncy signal, and the intermediate-freuqncy signal that receives is carried out the modem module of demodulation output baseband signal with (DMA) technology of sharing frequently;
The intermediate-freuqncy signal of described modem module output is become the up-conversion unit of radiofrequency signal and output;
The power amplifier unit that the power amplification of the radiofrequency signal of described up-conversion unit output is exported to the default radiant power;
Send radiofrequency signal to machine, reach the antenna that receives the radiofrequency signal of machine;
With the radio signal transmission of described power amplifier unit output to described antenna, and the radiofrequency signal output that antenna is received, and the isolated location that the radiofrequency signal of sending and receiving is isolated;
Radiofrequency signal to described isolated location output is carried out filter filtering;
The radiofrequency signal of described filter output is amplified the AGC amplifying unit of back output;
The radiofrequency signal of described AGC amplifying unit output is become the down-converter unit of intermediate-freuqncy signal and output; And
By the intermediate-freuqncy signal of described down-converter unit output is amplified, provide the low noise amplifier of the incoming level that amplitude meets the demands for the demodulation of described modem module;
Described up-conversion unit provides the level of drive for described power amplifier unit.
2, as claimed in claim 1 with frequency duplex wireless digital communication equipment, it is characterized in that, described modem module in modulating/demodulating, also will export lock-out pulse in order to the transmitting-receiving conversion of control complete machine to described up-conversion unit, power amplifier unit, isolated location, AGC amplifying unit and down-converter unit.
3, as claimed in claim 1 or 2 with frequency duplex wireless digital communication equipment, it is characterized in that described isolated location is specially circulator.
4, the duplex wireless of frequency together digital communication equipment as claimed in claim 1 is characterized in that described modem module also is used at the dynamic channel quality of modulating/demodulating process basis, and footing is modulated in the selection of automatic dynamic ground.
5, the duplex wireless of frequency together digital communication equipment as claimed in claim 1 is characterized in that the bandwidth range of described modem module base band signal modulated is 0.1-49Mbps, and the wireless frequency bandwidth that takies is 0.45Mhz-5Mhz.
6, as claimed in claim 1 with frequency duplex wireless digital communication equipment, it is characterized in that described modem module also is used for adding the solomon code of front and back error correction when modulating.
7, the duplex wireless of frequency together digital communication equipment as claimed in claim 1 is characterized in that, described AGC amplifying unit also is used to utilize automatic gain control (AGC) circuit to cooperate amplifying circuit to provide stable entry level for described down-converter unit.
8, the duplex wireless of frequency together digital communication equipment as claimed in claim 1 is characterized in that described modem module adopts the 1024QAM modulation system, possesses the parallel 2048 subcarrier transmission performances of OFDM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202229689U CN201303345Y (en) | 2008-11-28 | 2008-11-28 | Co-channel duplex wireless digital communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202229689U CN201303345Y (en) | 2008-11-28 | 2008-11-28 | Co-channel duplex wireless digital communication device |
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| CN201303345Y true CN201303345Y (en) | 2009-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202229689U Expired - Fee Related CN201303345Y (en) | 2008-11-28 | 2008-11-28 | Co-channel duplex wireless digital communication device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248594A (en) * | 2012-02-14 | 2013-08-14 | 吴嶽 | Method for realizing co-frequency full duplex wireless communication |
| CN103546198A (en) * | 2013-10-28 | 2014-01-29 | 阳光电源股份有限公司 | Direct current carrier wave communication device, method and communication system |
| WO2015042983A1 (en) * | 2013-09-30 | 2015-04-02 | 华为技术有限公司 | Antenna and communication device |
| CN111585644A (en) * | 2020-05-27 | 2020-08-25 | 北京邮电大学 | Radar communication integrated system, signal processing method and apparatus, and storage medium |
-
2008
- 2008-11-28 CN CNU2008202229689U patent/CN201303345Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248594A (en) * | 2012-02-14 | 2013-08-14 | 吴嶽 | Method for realizing co-frequency full duplex wireless communication |
| WO2015042983A1 (en) * | 2013-09-30 | 2015-04-02 | 华为技术有限公司 | Antenna and communication device |
| US10044492B2 (en) | 2013-09-30 | 2018-08-07 | Huawei Technologies Co., Ltd. | Antenna and communications device |
| CN103546198A (en) * | 2013-10-28 | 2014-01-29 | 阳光电源股份有限公司 | Direct current carrier wave communication device, method and communication system |
| CN103546198B (en) * | 2013-10-28 | 2016-03-30 | 阳光电源股份有限公司 | A kind of DC carrier wave communication device, method and communication system |
| CN111585644A (en) * | 2020-05-27 | 2020-08-25 | 北京邮电大学 | Radar communication integrated system, signal processing method and apparatus, and storage medium |
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| 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: 20090902 Termination date: 20101128 |