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Iteration-enhanced amplifying and forwarding cooperation communication method

A cooperative communication, amplification and forwarding technology, applied in the field of communication, can solve the problems of low outage probability, low spectrum efficiency, unsatisfactory outage probability performance, etc., and achieve the effect of reducing the number of time slots

Inactive Publication Date: 2011-05-18
XIDIAN UNIV
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Problems solved by technology

The NAF method has higher spectral efficiency, but the outage probability performance is not ideal, while the iterative method can guarantee to obtain a lower outage probability while improving the spectral efficiency under high SNR, but its spectral efficiency is still low under low SNR

Method used

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  • Iteration-enhanced amplifying and forwarding cooperation communication method
  • Iteration-enhanced amplifying and forwarding cooperation communication method
  • Iteration-enhanced amplifying and forwarding cooperation communication method

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail: present embodiment is carried out under the premise of the present invention scheme, has provided detailed implementation mode and concrete operation step, but protection scope of the present invention is not limited to the following the embodiment.

[0024] The multi-relay AF cooperative communication system model adopted by the present invention is as follows: figure 1 shown. Where S is the source node, D is the destination node, and M relay nodes are allocated to the source node S, and all nodes are single-antenna. A specific communication parameter setting of a multi-relay AF cooperation system is given below to illustrate the implementation steps of the present invention. It should be noted that the parameters in the following examples do not affect the generality of the present invention.

[0025] refer to figure 2 , the operation steps of this embod...

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Abstract

The invention provides an iteration-enhanced amplifying and forwarding cooperated communication method which is mainly used for solving the problems of low frequency spectrum efficiency and high interruption probability of the existing cooperation method. The method comprises: according to the quality of service (QoS) requirement of a destination node, setting the receiving signal to noise ratio gammath of the destination node; during communication, comparing the signal to noise ratio of a received source signal with the gammath by the destination node; if the signal to noise ratio is larger than the gammath, feeding back to notify all relays to stop forwarding; otherwise, firstly selecting the front N relays with higher signal to noise ratios from the total M relays to perform forwarding, wherein each relay occupies one time slot; combining source nodes and the signals of all the forwarding relays by the destination node; comparing the total signal to noise ratio of the received signals with the gammath; if the total signal to noise ratio is larger than the gammth, feeding back to notify all the relays to stop forwarding; and otherwise, after the N relays finish forwarding, notifying the left M-N relays to forward together if the signal to noise ratio received by the destination node is still less than the gammath. By utilizing the method, the interruption probability of an audio frequency (AF) cooperation system can be lowered, and the frequency spectrum efficiency is improved.

Description

technical field [0001] The invention belongs to the communication field, and relates to an iterative enhanced amplifying and forwarding AF cooperative communication method, which can be used to reduce the interruption probability of a multi-relay AF cooperative system and improve its spectrum efficiency. Background technique [0002] The multi-antenna technology can greatly improve the capacity and reliability of the wireless communication system. In recent years, as an extension of multi-antenna technology, cooperative communication technology, in which single-antenna users cooperate to form a virtual antenna array, has attracted widespread attention from all walks of life. In the mobile communication system, each single-antenna mobile terminal can obtain the diversity gain similar to that in the multi-antenna technology by cooperating with each other, and improve the reliability of communication without increasing the cost of the terminal. It has a good application prospe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/10H04W72/08H04W72/54
Inventor 张南葛建华李靖高明宫丰奎王勇
Owner XIDIAN UNIV
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