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

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

doi:10.3969/j.issn.0372-2112.2017.09.026

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

更新时间：2025-07-16

- A Method for Blind Recognition of STBC-OFDM Signals Based on FOLP
- Acta Electronica Sinica Vol. 45, Issue 9, Pages: 2233-2240(2017)
- 作者机构：
  
  海军航空工程学院信息融合研究所,山东,烟台,264001
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61179016);Taishan Scholars Special Funding for Construction Projects (No.ts201511020);Major Research Plan of National Natural Science Foundation of China (No.91538201)
- DOI：10.3969/j.issn.0372-2112.2017.09.026
  CLC： TN911.7
- Published Online：25 September 2017，
  
  Published：2017
- 稿件说明：
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YAN Wen-jun, ZHANG Li-min, LING Qing. A Method for Blind Recognition of STBC-OFDM Signals Based on FOLP[J]. Acta Electronica Sinica, 2017, 45(9): 2233-2240.
DOI：

YAN Wen-jun, ZHANG Li-min, LING Qing. A Method for Blind Recognition of STBC-OFDM Signals Based on FOLP[J]. Acta Electronica Sinica, 2017, 45(9): 2233-2240. DOI： 10.3969/j.issn.0372-2112.2017.09.026.

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.

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.

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