摘要
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.
出处
《福州大学学报(自然科学版)》
CAS
CSCD
北大核心
2012年第6期759-763,共5页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(61170147)
福建省教育厅科研资助项目(JA12024)
关键词
信噪比估计
低压电力线
载波通信
算法
signal-to-noise ratio estimation
low-voltage power line
carrier communication
algorithm