使用分集技术的信号调制类型识别

Modulation Classification Using Spatial Diversity

针对衰落环境下的调制识别,该文基于决策理论和多天线接收分集技术提出了一种解决方法。根据对未知信道和信号参数的不同处理方式,推导了用于识别的似然函数,并构造了分类器。采用多天线分集技术提高正确识别率,并考虑了天线空间位置对分集合并的影响,提出了解决办法。计算机仿真结果表明该文所述方法的有效性和正确性。

A decision-theoretic based scheme is developed for modulation classification in a fading environment. The proposed method takes into account a fiat Rayleigh fading propagation channel. The likelihood function is derived according to the channel and signals＇ parameters character and classifier is constructed. Spatial diversity technique with multi-antennas array receiver is exploited to improve the correct classification probability. A method dealing with the effect for diversity induced by the displacement of receiving antennas is also proposed. Simulations demonstrate that the proposed scheme is efficient in fading situations.