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MIMO (multiple input multiple output) cooperative relay selection method

A technology of cooperative relay and relay node, applied in the field of mobile communication

Inactive Publication Date: 2015-07-22
GUANGXI NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the single-antenna cooperative communication system also involves the fair relay selection problem, the MIMO cooperative communication system is largely different from the single-antenna cooperative communication system, so we need to seek new ideas for solving the relay selection problem of the MIMO cooperative communication system

Method used

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  • MIMO (multiple input multiple output) cooperative relay selection method
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  • MIMO (multiple input multiple output) cooperative relay selection method

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Embodiment Construction

[0043] The present invention uses node transmission power as a factor to balance node loads, and strives to obtain balance between node loads while ensuring MIMO channel capacity. When all services are transmitted on the node with the largest MIMO channel capacity, the transmission power of this node must be relatively large, and the energy consumed must be large, which is unacceptable for mobile nodes powered by batteries. For fixed nodes, high transmit power will inevitably cause greater interference to the system, and ultimately affect the overall performance of the system, which is also not advisable.

[0044] Because the bit error rate performance of the system is not only related to the signal-to-noise ratio of the receiving end, but also related to the balance between the SNRs of each receiving antenna, so when the SNR of the receiving end is constant, the SNR of each receiving antenna is balanced When the bit error rate performance of the system is optimal, compared wi...

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Abstract

The invention discloses an MIMO (multiple input multiple output) cooperative relay selection method. The method includes: employing MIMO channel capacity, node normalized transmitting power, receiving antenna signal-to-noise ratio balance and MIMO channel relevancy as inputs of a fuzzy algorithm, employing two fuzzy rules, with the primary fuzzy rule being used for describing correlation among the MIMO channel capacity, the node normalized transmitting power and MIMO relay selection and the secondary fuzzy rule being used for describing the correlation among the receiving antenna signal-to-noise ratio balance, the MIMO channel relevancy and the MIMO relay selection, by means of the fuzzy algorithm, fusing MIMO relay selection results which are output and which pass the fuzzy rules, and thus determining the MIMO relay node required. The method has the advantages that the characteristics of the MIMO technique are fully considered, the characteristics are combined with the relay selection problem by means of the fuzzy mathematics, the novel MIMO relay selection method simple and practical is formed, performance of an MIMO cooperative communication system is further improved, and the method is of good flexibility and low implementing complexity.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a MIMO cooperative relay selection method. Background technique [0002] Among the many wireless transmission candidate technologies, MIMO (Multiple Input Multiple Output) technology is undoubtedly one of the mainstream candidate technologies for future wireless communication systems. As one of the key technologies of the fifth generation mobile communication system, relay cooperation technology and MIMO The combination of technologies will greatly increase the capacity of the communication system and better resist fading. MIMO relay selection is an unavoidable key issue in the study of MIMO cooperative communication systems. Relevant studies have produced some results or are in progress. It should be pointed out that the current research focuses on theoretical methods and ignores some problems in real systems, such as the fairness of relay selection. Although sing...

Claims

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Application Information

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IPC IPC(8): H04W28/08H04W48/20H04W40/04H04B7/04
CPCY02D30/70
Inventor 肖琨
Owner GUANGXI NORMAL UNIV
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