J4 ›› 2012, Vol. 29 ›› Issue (5): 644-650.

• 光通信 • 上一篇    下一篇

长期演进上行分集接收算法研究

解东瑞1,2, 延凤平1,2   

  1. 1 北京交通大学全光网络与现代通信网教育部重点实验室, 北京 100044; 
    2 北京交通大学光波技术研究所,北京 100044 
  • 收稿日期:2011-09-27 修回日期:2011-12-17 出版日期:2012-09-28 发布日期:2012-09-02
  • 通讯作者: 延凤平(1966—)山西人,博士生导师,主要从事光纤通信,全光网络,新型特种光纤及光纤传感,无线通信等方面的研究。 E-mail:fpyan@bjtu.edu.cn
  • 作者简介:解东瑞(1985—),女,河北人,研究生,主要从事无线通信,LTE物理层算法及相关技术的研究。E-mail:09120176@bjtu.edu.cn
  • 基金资助:

    国家自然科学基金(60877042,60736003)资助

Study on diversity reception algorithms in LTE uplink

Xie Dong-rui1,2,  Yan Feng-ping1,2   

  1. 1 Key Laboratory of All Optical Network & Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China; 
    2 Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China
  • Received:2011-09-27 Revised:2011-12-17 Published:2012-09-28 Online:2012-09-02

摘要:

为降低3GPP 长期演进(LTE)上行多天线系统分集接收计算复杂度,提高硬件处理效率,改善系统性能,对八天线系统不同干扰强度情况下的干扰抑制合并(IRC)、最大比合并(MRC)、简化的干扰抑制合并(SIRC)和简化的最大比合并(SMRC)算法进行了比较与仿真分析。仿真结果表明在八天线系统中SIRC能够以1dB左右的信噪比损失获得8N倍运算量的降低,并能采用划分天线子阵的方法来提高效率。当存在较强的相关干扰时利用SIRC代替IRC,当干扰较弱或无相关干扰时利用SMRC代替MRC进行分集接收合并,不仅能够明显降低运算量,并能获得较好的效果。

关键词: 光通信, 分集接收算法, 仿真分析, 干扰抑制合并, LTE

Abstract:

To reduce computational complexity of 3GPP Long Term Evolution (LTE) uplink diversity reception in multiple antennas system, improve the hardware processing efficiency and achieve relatively good system performance, Interference Rejection Combining (IRC), Maximum Ratio Combining (MRC), Simplified Interference Rejection Combining (SIRC) and Simplified Maximum Ratio Combining (SMRC) algorithms were compared with simulation analysis of different interference strength in eight antennas system. According to the simulation results, when using SIRC algorithm in eight antennas system, computational complexity can be reduced to 1/8N with 1dB SNR loss, and efficiency can be improved by the method of antennas subarray division. SIRC rather than IRC is used when there is strong correlated interference, SMRC rather than MRC is used when there is weak or negligible interference for diversity reception. As a result, the performance degrades somewhat while computational complexity can be reduced greatly.

Key words: optical communication, diversity reception algorithms, simulation analysis, interference rejection combining, long term evolution

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