基于循环累积量的Link-11载波盲估计  

Blind Estimation of Link-11 Carrier Wave Based on Cyclic Cumulants

作　　者：张龙辉 罗明[1] ZHANG Long-hui;LUO Ming(Xidian University,Xi'an 710071,China)

机构地区：[1]西安电子科技大学,陕西西安710071

出　　处：《舰船电子对抗》2018年第1期79-82,共4页Shipboard Electronic Countermeasure

基　　金：西安电子科技大学基本科研业务费资助项目;项目编号:JB160221

摘　　要：提出了一种利用高阶循环累积量对Link-11信号载波频率盲估计的方法。Link-11信号的调制方式为π/4差分四相相移键控(DQPSK)。证明了加性高斯白噪声(AWGN)信道背景下,子载波采用π/4DQPSK调制的正交频分复用(OFDM)信号的八阶循环累积量仅在子载波处存在,因此可以通过检测此循环频率实现Link-11的子载波盲估计。仿真实验证明该方法有效实用。This paper proposes a blind estimation method of Link-11 signal carrier wave frequency by using high-order cyclic cumulants.The modulation mode of Link-11 signal isπ/4 differential quadrature phase shittkeying(DQPSK).Based on the additive white Gaussian noise(AWGN)channel,the eight-order cyclic cumulants of orthogonal frequency division multiplexing(OFDM)signal exists only at the location of its subcarrier,which adoptsπ/4 DQPSK modulation,so the subcarrier blind estimation of Link-11 can be realized by detecting the cyclic frequencies.Simulative experiment proves that the method is effective and practical.

关 键 词：多载波调制 高阶循环累积量 非平稳高斯噪声 信噪比 

分 类 号：TN911.7[电子电信—通信与信息系统]