通信学报 ›› 2017, Vol. 38 ›› Issue (4): 46-54.doi: 10.11959/j.issn.1000-436x.2017082

• 学术论文 • 上一篇    下一篇

基于改进K-S检测的STBC-OFDM信号盲识别算法研究

凌青,张立民,闫文君   

  1. 海军航空工程学院信息融合所,山东 烟台 264001
  • 修回日期:2016-07-19 出版日期:2017-04-01 发布日期:2017-07-20
  • 作者简介:凌青(1987-),女,湖南衡阳人,博士,海军航空工程学院讲师,主要研究方向为通信信号处理和空时分组码技术。|张立民(1966-),男,辽宁开原人,博士,海军航空工程学院教授、博士生导师,主要研究方向为通信信号处理和电子技术仿真。|闫文君(1986-),男,山东莱州人,博士,海军航空工程学院讲师,主要研究方向为通信信号处理和计算机仿真。
  • 基金资助:
    泰山学者工程专项基金资助项目(Ts201511020);国家自然科学基金重大研究计划基金资助项目(91538201)

Blind recognition of STBC-OFDM signals based on modified K-S test

Qing LING,Li-min ZHANG,Wen-jun YAN   

  1. Institute of Information Fusion,Naval Aeronautical and Astronautical University,Yantai 264001,China
  • Revised:2016-07-19 Online:2017-04-01 Published:2017-07-20
  • Supported by:
    The Project Supported by Taishan Scholar Foundation(Ts201511020)

摘要:

针对多输入单输出(MISO,multiple input single output)通信系统的STBC-OFDM信号盲识别问题,提出基于OFDM块的改进Kolmogorov-Smirnov (K-S)检测方法。该方法首先对MISO通信系统的STBC-OFDM信号建模;然后利用STBC-OFDM信号编码矩阵的相关性,构造不同时延向量下STBC-OFDM接收信号OFDM块的经验函数作为特征函数;最后通过改进K-S检测方法检验经验分布函数之间的距离盲识别STBC-OFDM信号。该方法不需要噪声信息、调制信息和信道系数,适合非合作通信场合。理论分析和实验验证了该方法的可行性。

关键词: MISO通信系统, STBC-OFDM信号, 改进K-S检测, 经验分布函数

Abstract:

Aiming at the problem that existed blind classification of STBC-OFDM in multiple input single output (MISO) communication system,an efficient method for blind classification of space-time block coded orthogonal frequency-division multiplexing (STBC-OFDM) signals based on modified Kolmogorov-Smirnov (K-S) test was proposed,when a single receiver antenna was employed at the receiver.Firstly,the model of received STBC-OFDM signals in MISO systems was given.Secondly,with the correlation of the coding matrix of STBC-OFDM signals,and the discrimination features function provided by the empirical cumulative distribution (CDFs) of the received OFDM blocks was constructed.Finally,the distance between CDFs was tested by the two-sample K-S test,which could blindly classify the STBC-OFDM signals.The proposed algorithm didn't need the estimation of channel,noise statistics and modulation type,and consequently,was well suited for non-cooperative communication context.Theoretical analysis and experimental verify its validity.

Key words: MISO communication system, STBC-OFDM signal, modified K-S test, cumulative distribution function

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