Collaboration communication method of high-efficiency frequency spectrum utilization ratio

Abstract

The present invention discloses a collaboration communication method for improving frequency spectrum utilization ratio in wireless communication field, for principally resolving a problem that a traditional collaboration communication system reduces the frequency spectrum utilization ratio when dividing time slot. The method is implemented by the following steps: a node A modulates information ofown and information of a node B received at a last time slot by mapping schemes C1 and C2, and orthogonally adds the two-road modulation signals together and broadcast; the node B modulates local information and relay information by mapping schemes C3 and C4, then broadcasts adding modulation symbols; a destination node D demodulates received two-road adding symbols unitedly and obtains information of the node A. The node D obtains the information of the node A by an identical collaboration communication method. The invention ensures a user node to transmit the local information and the relayinformation simultaneously, which improves the systemic frequency spectrum utilization ratio, and further improves error code performance of the collaboration system and ensures communication qualitywithout addition of system complexity.

Description

technical field [0001] The invention relates to a cooperative communication method in the field of wireless communication, in particular to a cooperative communication method with high spectral efficiency, which is used in a cooperative communication system. Background technique [0002] Since the development of wireless communication, people's demand for wireless transmission data rate and service quality has been continuously improved, but the multipath fading of signal transmission in wireless communication has always been an important bottleneck that plagues the improvement of wireless data transmission rate and service quality. How to overcome the multipath effect It has become the primary problem to be solved to improve the communication quality. Although Multiple Input Multiple Output (MIMO) technology has obvious advantages in anti-multipath fading and improving the speed and quality of communication links, due to the limitations of mobile terminals and volume, it is...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional cooperative communication system divides time slots and causes the spectrum utilization rate to decrease, and proposes a cooperative communication method with high spectrum utilization rate, so that user nodes can send local information and relay information at the same time, improving The throughput of the node and the spectrum utilization rate of the system are improved, and the information of the same user adopts different mapping schemes when modulated by different nodes, which can balance the reliability between bits and further improve the system without increasing the complexity of the system. BER performance of collaborative systems, improving communication quality

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