Self-adaption relay communication method based on ladder modulation

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...

AI Technical Summary

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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