A relay selection scheme with limit feedback in OFDM relay networks based on subcarrier mapping

Funian Li, Xinda Ke, Liang Wang
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引用次数: 4

Abstract

Subcarrier mapping (SCM) is an efficient way to evidently improve the average end-to-end capacity in cooperative OFDM networks. However perfect channel knowledge is required, which leads to large feedback amount of channel state information (CSI). In this paper, the uplink scenario of multi-relay OFDM cooperative networks with subcarrier mapping scheme is considered. An opportunistic relaying strategy with limit feedback CSI is proposed. The transmission scheme, which is based on instantaneous channel quality, is selected to offer maximum the end-to-end system capacity. The simulations show that the proposed approach can achieve almost asymptotically performance as full CSI feedback scheme with large number of subcarriers.
基于子载波映射的OFDM中继网络限制反馈中继选择方案
在协作OFDM网络中,子载波映射(SCM)是显著提高端到端平均容量的有效方法。然而,由于需要完善的信道知识,信道状态信息的反馈量很大。本文研究了具有子载波映射方案的多中继OFDM合作网络的上行场景。提出了一种具有极限反馈CSI的机会中继策略。选择基于瞬时信道质量的传输方案以提供最大的端到端系统容量。仿真结果表明,该方法可以达到具有大量子载波的全CSI反馈方案的几乎渐近性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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