双向中继系统阀值速率影响分析

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双向中继系统阀值速率影响分析

更新时间：2025-07-09

- 双向中继系统阀值速率影响分析
- Issue 10, Pages: 88-92(2011)
- 作者机构：
  
  西安电子科技大学综合业务网理论及关键技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.5
- Online First：10 October 2011，
  
  Published：2011
- 稿件说明：
移动端阅览
[J]. 2011, (10): 88-92.
DOI：

[J]. 2011, (10): 88-92. DOI：

摘要

为了更好地分析阀值速率不对称对实际双向中继系统性能的影响

提出了阀值速率比因子性能分析法.该方法首先根据2个方向阀值速率定义了阀值速率比因子

然后求出系统性能表达式作为阀值速率比因子的函数

并根据函数研究该因子对性能表达式的影响

从而得到阀值速率不对称对系统性能的影响.使用该方法对Nakagami-m衰落下的系统中断概率进行了研究

结果表明

信噪比一定时

阀值速率不对称将导致系统中断概率增大.仿真结果表明

当中继与终端Nak-agami-m衰落指数分别为1和1.2、信噪比为20 dB、阀值速率比因子从1增大到3时

系统的中断概率约增大了3%.

Abstract

In order to analyze the impact of the asymmetric threshold rate on the performance of two-way relaying system more precisely

a method named performance analysis of ratio of threshold rate(RTR)is presented. The RTR is defined based on two directional threshold rates

then performance expressions are derived to obtain a function of RTR and the effect of the RTR on performance expressions is studied to obtain the effect of asymmetric threshold rate on the performance of the system. The proposed method is used to analyze the outage probability in Nakagami-m fading channel

and the results show that the outage probability increases with RTR increasing when the ratio of signal to noise(SNR)is a constant. Simulation results show that the outage probability increases by about 3% when the fading parameter pertaining to each terminal-pair-relay link is 1 and 1.2

respectively

SNR is 20 dB

and RTR increases from 1 to 3.

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