Blind recognition of OFDM signals based on multi-parameter characteristics

被引：0
|
作者：
Guo L. [1 ]
Yu Z. [1 ]
机构：
[1] School of Information and Communication Engineering, Harbin Engineering University
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2010年 / 45卷 / 05期
关键词：
High-order cumulant; Intermediate frequency signal; Modulation recognition; OFDM (orthogonal frequency division multiplexing); Rayleigh fading channel; Trigonometric moment;
D O I：
10.3969/j.issn.0258-2724.2010.05.013
中图分类号：
学科分类号：
摘要：
A blind identification algorithm of multi-carrier modulation under the condition of Rayleigh fading channels was proposed to distinguish multi-carrier modulation OFDM (orthogonal frequency division multiplexing) signals and digital single-carrier signals (such as MASK (multiple amplitude shift keying), MFSK (multiple frequency shift keying), MPSK (multiple phase shift keying) and MQAM (multiple quadrature amplitude modulation) signals). This algorithm uses the characteristic parameters composed of high-order cumulants and trigonometric moments of signals for distinguishing single-carrier signals and multi-carrier OFDM signals to improve the traditional algorithm. It does not need to know the carrier frequency and the baud rate of the unknown signal in advance but deals with the intermediate frequency signal directly. The simulation results show that the proposed algorithm has the advantages of strong anti-multipath, high recognition rate, and it can gain a recognition rate of 100% when the SNR (signal noise radio) is greater than 0 dB.
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页码：732 / 738
页数：6
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