CN104993902A - Satellite communication system channel reuse method - Google Patents
Satellite communication system channel reuse method Download PDFInfo
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- CN104993902A CN104993902A CN201510253930.2A CN201510253930A CN104993902A CN 104993902 A CN104993902 A CN 104993902A CN 201510253930 A CN201510253930 A CN 201510253930A CN 104993902 A CN104993902 A CN 104993902A
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Abstract
The invention provides a satellite communication system channel reuse method. Two signal transmission paths, which are respectively an I path and a Q path, are provided; the I path sends one continuous signal frame in each second, and the continuous signal frame structure comprises a frame head, an information frame, a Q path parameter frame and a verification frame; a Q path information rate is determined by the Q path parameter frame in the I path, and a Q path signal frame structure comprises a frame head, a signal frame, a frame type and an ending frame; and after carrier wave modulation is carried out on digital signals of the I path and the Q path, merging emission is performed. According to the invention, the characteristics of in-phase orthogonal modulation are utilized, the signals of the I path and the Q path respectively transmit two paths of data, and a continuous business concurrent reuse channel or a continuous business and burst business concurrent reuse channel is realized; in addition, if the continuous business and the burst business are concurrent, the burst mode is adopted by the signals of one path, the path is of a time division multiplexing type, and other information can be burst, so that the utilization rate of channel resources is further improved.
Description
[technical field]
The present invention relates to satellite communication field, particularly relate to the method for satellite communication system channel multiplexing.
[background technology]
The present invention relates to satellite communication system, transmitted by satellite communication system settling signal.Wherein will the service definition of long-time even permanent busy channel resource in satellite communication system, be needed to be continuous business, such as speech business, Long Binary transport service and satellite main website and subscriber station synchronous signaling etc.And be burst service by the service definition needing busy channel resource time shorter, such as short message and channel request message etc.
Current satellite communication system just achieves multiple burst service time division multiplex channel, and for multiple continuous service concurrence or continuously business and burst service concurrent, the method increasing channel or improve channel width can only be adopted to ensure service concurrence transmission rate, the channel multiplexing that multiple continuous business, continuously business and burst service are concurrent cannot be realized.
In existing channel communication method, a circuit-switched data serioparallel exchange can be divided into two paths of signals, obtain I after shaping filter, Q two paths of signals, launch together after carrying out carrier modulation respectively, thus improve the availability of frequency spectrum.This two-way carrier wave is mutually orthogonal.Orthogonal signalling are exactly that two-way frequency is identical, the carrier wave that phase is 90 degree, general sin and cos.
[summary of the invention]
The present invention is directed to above situation propose a kind of can by multiple continuous business or continuously business and burst service carry out the method for channel multiplexing.
The method of satellite communication system channel multiplexing of the present invention,
Two paths of signals transmission I road and Q road: continuous signal frame information constant rate, I road transmission per second continuous signal frame, comprises frame head, information frame, Q road parameter frame and verification frame in continuous signal frame structure; Frame head is for representing the beginning of each frame, and information frame comprises effective signal message, and Q road parameter frame is used to indicate Q road signal message transmission rate, and verifies frame for checking signal frame correctness.
Q road information rate is decided by the Q road parameter frame in I road, comprises frame head, signal frame, frame type and end frame in the signal frame structure of Q road; Frame head is for representing the beginning of each frame, and information frame is useful signal information, without extra symbol; Frame type is for identifying this signal frame type of service; End frame represents the end of this frame.
After carrier modulation is carried out to I road, Q railway digital signal, merge and launch.
Wherein Q road signal adopts continuously or burst mode.
When Q road signal is burst mode, can distinguish according to frame type and realize multiple this road of burst service time division multiplexing.When transmitting multiple burst service, the signal frame after demodulation can be distinguished as mark according to frame type, and frame type signal how of the same race combines, and can restore each burst service, thus realizes multiple this road of burst service time division multiplexing.
The present invention utilizes the feature of inphase quadrature modulation, and I, Q two paths of signals is transmitting two paths data respectively, realizes continuous service concurrence or business and the concurrent multipling channel of burst service continuously; If continuously business is concurrent with burst service, a wherein road signal employing burst mode, can to happen suddenly other information on this road of time division multiplexing, carries high channel resource use ratio further.
[accompanying drawing explanation]
Fig. 1 is I road signal frame structure figure of the present invention;
Fig. 2 is Q road signal frame structure figure of the present invention;
Fig. 3 is channel multiplexing process schematic of the present invention.
[embodiment]
Below in conjunction with the drawings and specific embodiments of the present invention, the present invention is described in further detail.
The method of satellite communication system channel multiplexing of the present invention,
Two paths of signals transmission I road and Q road: continuous signal frame information constant rate, I road transmission per second continuous signal frame, comprises frame head, information frame, Q road parameter frame and verification frame in continuous signal frame structure; Frame head is for representing the beginning of each frame; Information frame comprises effective signal message, and unnecessary symbol sends special sequence as " 1010 "; Due to Q road signal message rate-compatible, signal madulation needs the information rate on I road, Q road, so need to comprise Q road parameter frame in the signal frame of I road to be used to indicate Q road signal message transmission rate; Obtain after carrying out CRC check to signal frame information all the elements verifying frame, for checking signal frame correctness.Q branch road spreading rate and chip initial time identical with I branch road, Q road information rate is decided by the Q road parameter frame in I road, comprises frame head, signal frame, frame type and end frame in the signal frame structure of Q road; Frame head is for representing the beginning of each frame, and information frame is useful signal information, without extra symbol; Frame type is for identifying this signal frame type of service; End frame represents the end of this frame.
After carrier modulation is carried out to I road, Q railway digital signal, merge and launch.
Wherein Q road signal adopts continuously or burst mode.
When Q road signal is burst mode, can distinguish according to frame type and realize multiple this road of burst service time division multiplexing.When transmitting multiple burst service, the signal frame after demodulation can be distinguished as mark according to frame type, and frame type signal how of the same race combines, and can restore each burst service, thus realizes multiple this road of burst service time division multiplexing.
The present invention utilizes the feature of inphase quadrature modulation, and I, Q two paths of signals is transmitting two paths data respectively, realizes continuous service concurrence or business and the concurrent multipling channel of burst service continuously; If continuously business is concurrent with burst service, a wherein road signal employing burst mode, can to happen suddenly other information on this road of time division multiplexing, carries high channel resource use ratio further.
The above, it is only present pre-ferred embodiments, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, any simple modification that above embodiment is done is referred to according to the technology of the present invention, equivalent variations and modification, all belong in the scope of technical solution of the present invention.
Claims (3)
1. a method for satellite communication system channel multiplexing, is characterized in that: two paths of signals transmission I road and Q road, I road transmission per second continuous signal frame, comprises frame head, information frame, Q road parameter frame and verification frame in continuous signal frame structure; Q road information rate is decided by the Q road parameter frame in I road, comprises frame head, signal frame, frame type and end frame in the signal frame structure of Q road; After carrier modulation is carried out to I road, Q railway digital signal, merge and launch.
2. the method for satellite communication system channel multiplexing according to claim 1, is characterized in that, wherein Q road signal adopts continuously or burst mode.
3. the method for satellite communication system channel multiplexing according to claim 1, is characterized in that, when Q road signal is burst mode, distinguishes realize multiple this road of burst service time division multiplexing according to frame type.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510253930.2A CN104993902A (en) | 2015-02-03 | 2015-05-19 | Satellite communication system channel reuse method |
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| CN201510253930.2A CN104993902A (en) | 2015-02-03 | 2015-05-19 | Satellite communication system channel reuse method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106301531A (en) * | 2016-08-25 | 2017-01-04 | 成都奥克特科技有限公司 | Private network communication method based on satellite digital transmission system |
| WO2019214582A1 (en) * | 2018-05-07 | 2019-11-14 | 华为技术有限公司 | Service signal transmission method and apparatus |
| CN114070383A (en) * | 2021-11-18 | 2022-02-18 | 东方红卫星移动通信有限公司 | Communication method and device for improving spectrum efficiency in low-orbit satellite communication system |
| CN118055442A (en) * | 2024-04-11 | 2024-05-17 | 中国电子科技集团公司第五十四研究所 | Discontinuous service transmission method for mobile phone direct connection satellite communication system |
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| CN106301531A (en) * | 2016-08-25 | 2017-01-04 | 成都奥克特科技有限公司 | Private network communication method based on satellite digital transmission system |
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| CN118055442A (en) * | 2024-04-11 | 2024-05-17 | 中国电子科技集团公司第五十四研究所 | Discontinuous service transmission method for mobile phone direct connection satellite communication system |
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Application publication date: 20151021 |