Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array

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Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array

更新时间：2025-07-09

- Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array
- Vol. 45, Issue 8, Pages: 73-77+122(2011)
- 作者机构：
  
  西安交通大学智能网络与网络安全教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.3
- Online First：10 August 2011，
  
  Published：2011
- 稿件说明：
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Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array[J]. 2011, 45(8): 73-77+122.
DOI：

Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array[J]. 2011, 45(8): 73-77+122. DOI：

摘要

为了消除高移动性正交频分复用系统中多普勒扩展引发的子载波间干扰

提出一种利用均匀线阵同时补偿多个多普勒频率的方法. 该方法首先从空域的角度区分开具有不同多普勒频率的入射径

形成多个子信道

再分别对各个子信道进行多普勒补偿

最后对补偿后的子信道最大比合并

实现多普勒分集增益. 子信道的时变性在多普勒补偿后变低

因此可以避免较为复杂的信道估计和均衡算法. 仿真结果表明

在阵列孔径足够的情况下

该方法能有效对抗正交频分复用系统在高移动性环境下的误码率平台效应

较单天线接收方法有6～8 dB的信干比增益.

Abstract

A scheme which employs uniform linear array and can compensate multiple Doppler shifts simultaneously is proposed to eliminate intercarrier interference caused by Doppler spreading in high-mobility orthogonal frequency division multiplexing systems. The scheme separates different paths with unique Doppler frequency in space-domain

and generates multiple sub-channels. The Doppler shift on each sub-channel is then corrected independently and finally

the compensated multiple sub-channels are combined together for maximal-ratio so that Doppler diversity gains are realized. The time-variance of each sub-channel is reduced after compensation

and the estimation and equalization processes on receivers are simplified. Simulation results show that when sufficient elements are used

the error floors in high-mobility scenario are effectively combated

and a 6-8 dB signal-to-interference gain over one-antenna reception is obtained by the proposed scheme.

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references

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