电子学报 ›› 2017, Vol. 45 ›› Issue (9): 2233-2240.DOI: 10.3969/j.issn.0372-2112.2017.09.026

• 学术论文 • 上一篇    下一篇

基于FOLP的STBC-OFDM信号盲识别方法

闫文君, 张立民, 凌青   

  1. 海军航空工程学院信息融合研究所, 山东烟台 264001
  • 收稿日期:2015-12-10 修回日期:2016-12-19 出版日期:2017-09-25 发布日期:2017-09-25
  • 作者简介:闫文君,男,1986年1月生于山东莱州.现为海军航空工程学院信息融合研究所讲师.主要研究方向为通信信号处理和计算机仿真.E-mail:wj_yan@foxmail.com;张立民,男,1966年4月生于辽宁开原.现为海军航空工程学院信息融合研究所教授、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.E-mail:iamzlm@163.com;凌青,女,1987年5月生于湖南衡阳.现为海军航空工程学院信息融合研究所讲师.主要研究方向为通信信号处理和空时分组码技术.E-mail:linqing19870522@163.com
  • 基金资助:
    国家自然科学基金(No.61179016);泰山学者工程专项基金(No.ts201511020);国家自然科学基金重大研究计划(No.91538201)

A Method for Blind Recognition of STBC-OFDM Signals Based on FOLP

YAN Wen-jun, ZHANG Li-min, LING Qing   

  1. Institute of Information Fusion, Naval Aeronautical and Astronautical University, Yantai, Shandong 264001, China
  • Received:2015-12-10 Revised:2016-12-19 Online:2017-09-25 Published:2017-09-25

摘要: 针对STBC-OFDM信号盲识别中存在着识别所需样本数多、对频偏敏感和不适用于单接收天线等问题,提出一种基于FOLP(Fourth Order Lag Product)的识别方法.根据不同空时分组码元素的相关性,推导了接收信号的FOLP,构造了基于FOLP的峰值检测算法.推导和仿真结果表明,该算法能够在单接收天线下运行,且不需要知道信道信息、噪声信息、调制信息以及OFDM块的起始位置;且该算法不受调制方式的影响,对时延、相位噪声和频率偏移鲁棒性能好,能够应用于认知无线电、频谱监控等工程领域中.

关键词: 信号盲识别, 空时分组码, 正交频分复用, 四阶时延矩, 信号处理, 认知无线电

Abstract: Aiming at the problems that the former recognition algorithms for STBC-OFDM (Space-Time Block Code with Orthogonal Frequency Division Multiplexing) need too many received symbols,sensitive to frequency offset and not suitable for single received antenna,a method based on the fourth order lag product(FOLP) is proposed.According to the correlation between received STBC symbols,the FOLP of received signals is deduced,and a peak test algorithm is proposed to identify the STBCs.Unlike other methods,this algorithm does not require any prior information of channel coefficients,noise information,modulation type and start of OFDM block and,is well-suited for single received antenna context.The proposed method provides a good performance with low sensitivity to impairments in the received signals,such as time offset,phase noise and frequency offset.It can be applied in cognitive radio systems,spectrum surveillance,and so on.

Key words: blind signal recognition, space-time block code(STBC), orthogonal frequency division multiplexing(OFDM), fourth order lag product(FOLP), signal processing, cognitive radios

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