一种应用于LPLC通信的信噪比估计算法

An SNR estimation algorithm for LPLC communication

首先阐述了基于离散短时傅立叶变换(DSTFT)的多载波FSK通信系统的基本原理,然后提出了一种新的基于时频分析方法和高阶矩理论的信噪比估计算法,并对其进行详细推导,给出了计算公式,最后对该算法的性能进行了仿真.结果表明,其精度能满足低压电力线载波(LPLC)通信的实际需求.

Firstly,the principal of the multi-carrier FSK communication system based on discrete short time Fourier transform（DSTFT） is demonstrated.Then a new signal-to-noise（SNR） estimation algorithm based on time-frequency analysis method and high order moment theory is proposed.And the calculation formula of SNR estimation is obtained by detail derivation.Finally,simulation results show that the precision of the algorithm can meet the need of low-voltage power line carrier（LPLC） communication.