CN103516645A - Method for covering two-way multi-signal processing of high-speed moving object - Google Patents
Method for covering two-way multi-signal processing of high-speed moving object Download PDFInfo
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- CN103516645A CN103516645A CN201210217940.7A CN201210217940A CN103516645A CN 103516645 A CN103516645 A CN 103516645A CN 201210217940 A CN201210217940 A CN 201210217940A CN 103516645 A CN103516645 A CN 103516645A
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Abstract
The invention relates to the field of mobile communication and provides a method for covering two-way multi-signal processing of a high-speed moving object. According to the method, correction of the frequency difference of a plurality of communication terminals in the high-speed moving object can be achieved and the communication terminals can normally work at the same time. Devices of the method for covering two-way multi-signal processing of the high-speed moving object comprise a power source, two duplex combiners, a donor antenna, a service antenna, an uplink low-noise amplifier, an uplink power amplifier, a downlink low-noise amplifier and a downlink power amplifier, and further comprise a signal calculating processing module, an uplink frequency deviation processing module and a downlink frequency deviation processing module. The donor antenna is respectively connected with the input end of the uplink low-noise amplifier and the output end of the downlink power amplifier through the first duplex combiner, the output end of the uplink low-noise amplifier is connected with the input end of the uplink frequency deviation processing module, the output end of the uplink frequency deviation processing module is connected with the input end of the uplink power amplifier, and the output end of the uplink power amplifier and the input end of the downlink low-noise amplifier are respectively connected with the server antenna through the second duplex combiner.
Description
Technical field
The present invention relates to a kind of moving communicating field, particularly a kind of for solving the two-way many signals processing covering methods of high-speed mobile unit of a plurality of communication terminal communication issues in high-speed mobile unit.
Background technology
Along with development in science and technology, high-speed mobile unit is more and more, as the automobile of fast running, train etc., when the speed of high-speed mobile unit is greater than 160km/h, Doppler effect is fairly obvious, and in communication process, handover produces and goes offline, in order to solve this problem of Doppler effect, people adopt increases doppler correction device on high-speed mobile unit, and the signal that is about to receive carries out doppler correction, although can improve to a certain extent speech quality.But cannot meet the doppler correction device demand of a plurality of communication terminals simultaneously.
Because high-speed mobile unit majority is metal structure, signal is decayed fairly obvious in envelope, even if differ one or two meter in same envelope, the signal that two mobile terminals are accepted is likely from different regions, according to the principle of Doppler effect, likely just contrary when now two mobile terminals carry out frequency difference compensation.
As everyone knows, the communication zone that each communication terminal covers is different, therefore moving body is when high-speed mobile, although two communication terminals of one or two meter of being separated by are simultaneously in communication, but the pretreated result of frequency difference is likely contrary, one of them terminal normal field strong center approaches, and now frequency difference preliminary treatment should subtract frequently and process according to speed; And another terminal with respect to its residing communication zone normal field strong center away from direction move, now frequency difference preliminary treatment is to increase frequently and process according to speed.China Patent No.: 201010004143.1 disclose a kind of field intensity covering method for high-speed moving object; comprise the steps: fixed end signal transmission; broadband IP digital signal modulated is become to radiofrequency signal; the frequency of described radiofrequency signal is 100MHz～7GHz, then this radiofrequency signal is launched by antenna; Mobile terminal signal receives and carries out being demodulated to broadband IP digital signal after the correction of Doppler frequency difference, each output by switch outputs to respectively ，Ge Wei base station, Ge Wei base station and exports the movable signal of various standards and after mixer closes road, by cable or antenna, realize signal in moving body and cover.But in this scheme, just different terminals being carried out to different pre-frequency differences processes this problem and could not propose concrete solution, cannot realize the frequency difference of a plurality of communication terminals in high-speed mobile unit and proofread and correct, cannot eliminate or reduce the harmful effect that Doppler frequency shift brings.
Summary of the invention
Therefore, for above-mentioned problem, the present invention proposes a kind of can realization the frequency difference of a plurality of communication terminals in high-speed mobile unit is proofreaied and correct, and the two-way many signals of high-speed mobile unit that a plurality of communication terminals can be worked are simultaneously processed covering method.
For solving this technical problem, the present invention takes following scheme: the two-way many signals of a kind of high-speed mobile unit are processed covering method, comprise power supply, two duplexing mixers, donor antenna, retransmitting antenna, up low noise amplifier, ascending power amplifier, descending low noise amplifier and downlink power amplifier, also comprise calculated signals processing module, uplink frequency offset processing module and downlink frequency offset processing module, described donor antenna is connected with downlink power amplifier output with up low noise amplifier input respectively through the first duplexing mixer, described up low noise amplifier output is connected with uplink frequency offset processing module input, described uplink frequency offset processing module output connects ascending power amplifier in, described downlink power amplifier input is connected with downlink frequency offset processing module output, described downlink frequency offset processing module input is connected with descending low noise amplifier output, described ascending power amplifier out is connected with retransmitting antenna through the second duplexing mixer respectively with descending low noise amplifier input, described calculated signals processing module is connected with downlink frequency offset processing module with uplink frequency offset processing module respectively.
Further, described uplink frequency offset processing module and downlink frequency offset processing module are by two or more frequency offset processing unit formation that is connected in parallel.
Further, described frequency offset processing unit consists of frequency selection circuit, frequency sampling circuit, control telecommunication circuit, frequency adjustment VCO circuit and frequency shift circuit, described frequency selection circuit output is rate of connections sample circuit input and frequency shift circuit input respectively, described frequency sampling circuit output end connects controls telecommunication circuit input, described control telecommunication circuit output rate of connections is adjusted VCO circuit input end, described control telecommunication circuit is also connected with calculated signals processing module, and described frequency is adjusted VCO circuit output end and connected frequency shift circuit input.
Further, the descending movable signal that the up movable signal that described donor antenna receives and retransmitting antenna receive is any one movable signal in GSM, CDMA, WCDMA, TD-SCDMA, GSMR, TATRE, CMMB and WI-FI communication standard.
By adopting aforementioned techniques scheme, the invention has the beneficial effects as follows: by a plurality of signals in high-speed mobile unit, through frequency offset processing module and the calculated signals processing module of uplink downlink, process, realization is proofreaied and correct the frequency difference of a plurality of communication terminals in high-speed mobile unit, and a plurality of communication terminals can be worked simultaneously; Fundamentally eliminated Doppler effect and the switching disconnection of high-speed mobile unit in communication process, guaranteed good speech quality, netted transmission simultaneously solve many nets covering problem by list, the networking cost of saving more than 80% reduces by 90% environment pollution with electromagnet simultaneously.
Accompanying drawing explanation
Fig. 1 is the system architecture diagram of the embodiment of the present invention;
Fig. 2 is the structured flowchart of embodiment of the present invention frequency deviation processing unit.
Embodiment
Now the present invention is further described with embodiment by reference to the accompanying drawings.
The field intensity covering method of take below in a kind of bullet train (speed per hour is 300km/h) envelope illustrates that how realizing existing movable signal covers as the field intensity of GSM on bullet train; Due to identical in 2 frequency offset processing unit and a plurality of frequency offset processing unit principle, the present embodiment just be take each 2 frequency offset processing unit of uplink downlink, and as example, the present invention is further described.
With reference to figure 1 and Fig. 2, the two-way many signals of a kind of high-speed mobile unit of the present invention are processed covering method, comprise power supply, donor antenna 1, the first duplexing mixer 2, the second duplexing mixer 3, retransmitting antenna 4, up low noise amplifier 5, ascending power amplifier 6, descending low noise amplifier 7, downlink power amplifier 8, calculated signals processing module 9, uplink frequency offset processing module 10 and downlink frequency offset processing module 11, described donor antenna 1 is connected with downlink power amplifier 8 outputs with up low noise amplifier 5 inputs respectively through the first duplexing mixer 2, described up low noise amplifier 5 outputs are connected with uplink frequency offset processing module 10 inputs, described uplink frequency offset processing module 10 outputs connect ascending power amplifier 6 inputs, described downlink power amplifier 7 inputs are connected with downlink frequency offset processing module 11 outputs, described downlink frequency offset processing module 11 inputs are connected with descending low noise amplifier 7 outputs, described ascending power amplifier 6 outputs are connected with retransmitting antenna 4 through the second duplexing mixer 3 respectively with descending low noise amplifier 7 inputs, described calculated signals processing module 9 is connected with downlink frequency offset processing module 11 with uplink frequency offset processing module 10 respectively, described uplink frequency offset processing module 10 is connected in parallel and is formed by the first uplink frequency offset processing unit 101 and the second uplink frequency offset processing unit 102, described downlink frequency offset processing module 11 is connected in parallel and is formed by the first downlink frequency offset processing unit 111 and the second downlink frequency offset processing unit 112, described the first uplink frequency offset processing unit 101, the second uplink frequency offset processing unit 102, the first downlink frequency offset processing unit 111 and the second downlink frequency offset processing unit 112 all adopt frequency offset processing unit 12 to form, described frequency offset processing unit 12 is by frequency selection circuit 121, frequency sampling circuit 122, control telecommunication circuit 123, frequency adjusts VCO circuit 124 and frequency shift circuit 125 forms, described frequency selection circuit 121 outputs are rate of connections sample circuit 122 inputs and frequency shift circuit 125 inputs respectively, described frequency sampling circuit 122 outputs connect controls telecommunication circuit 123 inputs, described control telecommunication circuit 123 output rate of connections are adjusted VCO circuit 124 inputs, described control telecommunication circuit 123 is also connected with calculated signals processing module 9, described frequency is adjusted VCO circuit 124 outputs and is connected frequency shift circuit 125 inputs.
Operation principle of the present invention is: in the compartment of bullet train, diverse location has two communication terminals, up GSM movable signal receives by donor antenna, again through up low noise amplification, by uplink frequency offset processing module, movable signal is carried out to frequency-selective filtering this communication terminal frequency of sampling again, and frequency information is sent by calculated signals processing module and carries out correlation computations, according to bullet train traffic direction, set the first uplink frequency offset processing unit and the second uplink frequency offset processing unit corresponding communication terminal A and communication terminal B respectively, frequency offset processing unit arranges VCO frequency according to calculated signals processing module calculated rate difference value, in frequency shift circuit, carry out frequency offset correction processing, correction signal covers through retransmitting antenna transmission after ascending power amplifier carries out power amplification, and descending GSM movable signal receives by retransmitting antenna, again through descending low noise amplification, by downlink frequency offset processing module, movable signal is carried out to frequency-selective filtering this communication terminal frequency of sampling again, and frequency information is sent by calculated signals processing module and carries out correlation computations, according to bullet train traffic direction, set the first downlink frequency offset processing unit and the second downlink frequency offset processing unit corresponding communication terminal A and communication terminal B respectively, frequency offset processing unit arranges VCO frequency according to calculated signals processing module calculated rate difference value, in frequency shift circuit, carry out frequency offset correction processing, after downlink power amplifier is carried out power amplification, through donor antenna, transmitting covers correction signal again, can realize like this signal of the communication terminal of diverse location in same moving body is carried out to frequency correction.
The descending movable signal that the up movable signal that in the present invention, donor antenna receives and retransmitting antenna receive can also be any one movable signal in CDMA, WCDMA, TD-SCDMA, GSMR, TATRE, CMMB and WI-FI communication standard.
The present invention processes through frequency offset processing module and the calculated signals processing module of uplink downlink by a plurality of signals in high-speed mobile unit, realization is proofreaied and correct the frequency difference of a plurality of communication terminals in high-speed mobile unit, and a plurality of communication terminals can be worked simultaneously; Fundamentally eliminated Doppler effect and the switching disconnection of high-speed mobile unit in communication process, guaranteed good speech quality, netted transmission simultaneously solve many nets covering problem by list, the networking cost of saving more than 80% reduces by 90% environment pollution with electromagnet simultaneously.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but those skilled in the art should be understood that; within not departing from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (4)
1. the two-way many signals of high-speed mobile unit are processed covering method, comprise power supply, two duplexing mixers, donor antenna, retransmitting antenna, up low noise amplifier, ascending power amplifier, descending low noise amplifier and downlink power amplifier, it is characterized in that: also comprise calculated signals processing module, uplink frequency offset processing module and downlink frequency offset processing module, described donor antenna is connected with downlink power amplifier output with up low noise amplifier input respectively through the first duplexing mixer, described up low noise amplifier output is connected with uplink frequency offset processing module input, described uplink frequency offset processing module output connects ascending power amplifier in, described downlink power amplifier input is connected with downlink frequency offset processing module output, described downlink frequency offset processing module input is connected with descending low noise amplifier output, described ascending power amplifier out is connected with retransmitting antenna through the second duplexing mixer respectively with descending low noise amplifier input, described calculated signals processing module is connected with downlink frequency offset processing module with uplink frequency offset processing module respectively.
2. the two-way many signals of high-speed mobile unit according to claim 1 are processed covering methods, it is characterized in that: described uplink frequency offset processing module and downlink frequency offset processing module are by two or more frequency offset processing unit formation that is connected in parallel.
3. the two-way many signals of high-speed mobile unit according to claim 2 are processed covering method, it is characterized in that: described frequency offset processing unit is by frequency selection circuit, frequency sampling circuit, control telecommunication circuit, frequency adjusts VCO circuit and frequency shift circuit forms, described frequency selection circuit output is rate of connections sample circuit input and frequency shift circuit input respectively, described frequency sampling circuit output end connects controls telecommunication circuit input, described control telecommunication circuit output rate of connections is adjusted VCO circuit input end, described control telecommunication circuit is also connected with calculated signals processing module, described frequency is adjusted VCO circuit output end and is connected frequency shift circuit input.
4. the two-way many signals of high-speed mobile unit according to claim 1 are processed covering method, it is characterized in that: the descending movable signal that the up movable signal that described donor antenna receives and retransmitting antenna receive is any one movable signal in GSM, CDMA, WCDMA, TD-SCDMA, GSMR, TATRE, CMMB and WI-FI communication standard.
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| CN201210217940.7A CN103516645B (en) | 2012-06-26 | 2012-06-26 | A kind of two-way multi signal of high-speed mobile unit processes covering method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859039A (en) * | 2006-02-08 | 2006-11-08 | 华为技术有限公司 | Mobile communication system and its method for reducing up channel Doppler effect |
| CN101699917A (en) * | 2009-09-18 | 2010-04-28 | 深圳市云海通讯股份有限公司 | Repeater and method for processing downlink radio-frequency signal by same |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859039A (en) * | 2006-02-08 | 2006-11-08 | 华为技术有限公司 | Mobile communication system and its method for reducing up channel Doppler effect |
| CN101699917A (en) * | 2009-09-18 | 2010-04-28 | 深圳市云海通讯股份有限公司 | Repeater and method for processing downlink radio-frequency signal by same |
Non-Patent Citations (1)
| Title |
|---|
| 纪磊: "WCDMA无线直放站的射频关键技术研究", 《中国优秀硕士论文电子期刊网》 * |
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