Error performance of CE-OFDM based AF systems with relay selection

Tao JIANG; Guangqiu LI; Jianhui CAI

doi:10.11959/j.issn.1000-0801.2019283

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Error performance of CE-OFDM based AF systems with relay selection

Research and development | 更新时间：2024-06-05

- Error performance of CE-OFDM based AF systems with relay selection
- Telecommunications Science Vol. 35, Issue 12, Pages: 57-66(2019)
- 作者机构：
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- DOI：10.11959/j.issn.1000-0801.2019283
  CLC： TN911
- Published Online：2019-12，
  
  Published：20 December 2019
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Tao JIANG, Guangqiu LI, Jianhui CAI. Error performance of CE-OFDM based AF systems with relay selection[J]. Telecommunications science, 2019, 35(12): 57-66.
DOI：

Tao JIANG, Guangqiu LI, Jianhui CAI. Error performance of CE-OFDM based AF systems with relay selection[J]. Telecommunications science, 2019, 35(12): 57-66. DOI： 10.11959/j.issn.1000-0801.2019283.

摘要

恒包络（CE）正交频分复用（OFDM）能够开发OFDM的优点，并能消除OFDM峰均功率比高、对功率放大器非线性失真敏感的缺点。反馈时延等因素会恶化采用OFDM调制的中继选择放大转发（AF）协作系统的误码性能。最小均方误差（MMSE）维纳信道预测器能够减轻反馈时延对无线系统误码性能的恶化。为此，提出了一种能够克服OFDM缺点和反馈时延影响的、采用CE-OFDM调制和MMSE信道预测的中继选择AF协作系统方案，并推导其在瑞利块衰落信道上矩形正交幅度调制下的平均误比特率（ABER）下界表达式。数值计算和仿真结果表明：当调制系数较小时，上述系统的ABER下界具有较高的准确性，可用于CE-OFDM调制和MMSE信道预测的中继选择AF协作系统的设计。

Abstract

Constant envelope (CE) orthogonal frequency division multiplexing (OFDM) can develop the advantages of OFDM

and eliminate the shortcomings of high peak-to-average power ratio (PAPR) and sensitivity to non-linear distortion of power amplifiers.The error performance of OFDM based amplify-and-forward (AF) cooperative system with relay selection will be deteriorated due to feedback delay and other factors.Minimum mean square error (MMSE) Wiener channel predictor can alleviate the deterioration of error performance of wireless systems caused by feedback delay.For this reason

the CE-OFDM based AF cooperative system with relay selection and MMSE channel prediction which can overcome the shortcomings of OFDM and the influence of feedback delay was proposed

and its lower bound expressions for the average bit error rate (ABER) of rectangular quadrature amplitude modulation over Rayleigh block fading channels were derived.The numerical calculation and simulation results show that the lower bound expressions for the ABER of the above system has high accuracy when the modulation coefficients are small and can be used to design the AF cooperative system with CE-OFDM

channel prediction

and relay selection.

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Keywords

references

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