Self-adaption relay communication method based on ladder modulation

A relay communication and self-adaptive technology, applied in the field of communication, can solve problems such as communication interruption, communication quality degradation, and inability to decode broadcast messages, etc., and achieve the effect of maximizing data signal-to-noise ratio, improving bit error performance, and making full and reasonable use

Inactive Publication Date: 2013-06-05
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this patent application is: under the slightly harsh conditions of the communication scene, when there are many errors in the sent data, since the system has no error correction function, the communication quality may be degraded
The disadvantage of this patent application is: in the case of poor channels, the relay cannot decode the broadcast message, and then the relay cannot forward the message or broadcast a new message, which interrupts the communication

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  • Self-adaption relay communication method based on ladder modulation
  • Self-adaption relay communication method based on ladder modulation
  • Self-adaption relay communication method based on ladder modulation

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] Refer to attached figure 1 , the steps that the present invention realizes are as follows:

[0042] Step 1, acquire basic layer data and enhancement layer data.

[0043] The source node drills the data to be sent according to the 1 / 2 code rate; the data in the hole of the data to be sent after the hole is used as the basic layer data; the data outside the hole of the data to be sent after the hole is used as the enhancement layer data.

[0044] Step 2, adding a cyclic redundancy CRC check code.

[0045] At the end of the basic layer data and the enhanced layer data, 8-bit cyclic redundancy CRC check codes are respectively added to obtain the basic layer check data and the enhancement layer check data.

[0046] The specific implementation of the 8-bit CRC check code adopted in the embodiment of the present invention is carried out according to the following f...

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Abstract

The invention discloses a self-adaption relay communication method based on ladder modulation. The method comprises the steps: (1) obtaining basic layer data and strengthening layer data; (2) adding cyclic redundancy check (CRC) codes; (3) conducting convolution and coding; (4) obtaining a sending data matrix; (5) confirming a star map; (6) modulating sending data; (7) sending a relay noise signal; (8) conducting self-adaption choosing processing; (9) sending a direct route signal and a relay route signal; (10) combining signals; (11) conducting demodulation, convolution and decoding; and (12) removing the check codes. Ladder modulation, relay node self-adaption choosing processing and a maximal-ratio combining method are adopted by the self-adaption relay communication method to complete self-adaption relay communications based on the ladder modulation, according to different error code conditions, self-adaption choosing processing of relay nodes is allowed, error code rate of data of various routes can achieved independent controlling, the basic layer data and the strengthening layer data are fully and reasonably utilized, and error code performance of a whole system is improved.

Description

technical field [0001] The present invention belongs to the technical field of communication, and further relates to an adaptive relay communication method based on ladder modulation in the technical field of cooperative relay communication system. The method can realize self-adaptive relay communication, so that the communication system can use a relay node adaptive selection to complete the relay communication according to different bit error rates. The invention can independently control the bit error rate of each layer of data and improve the bit error performance of the whole system. Background technique [0002] Cooperative relay is a technology that may have a significant impact on the future development of wireless communications after OFDM and multi-antenna technology. Cooperative relay technology can greatly improve the capacity and coverage of wireless communication networks. The key to realize cooperative relay is to study the adaptive selection processing metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 刘龙伟张羽张海林
Owner XIDIAN UNIV
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