一种实用的通信信号信噪比盲估计方法

An Applied Method for Blind SNR Estimation in Communication Signals

提出了一种简单实用的无线通信信号信噪比盲估计方法。信号功率分布函数中的拐点是与信号频带有关的重要信息参数,通过检测该参数可精确估计信号的带宽和信噪比。对该方法的信号参数适应能力进行了理论分析和计算机仿真,结果表明,新方法无需任何先验信息,运算量小、精度高,适于硬件实现。

A simple and applied method for blind SNR estimation in wireless communications is developed, which is to use comer detection algorithm based on a definite integral of power spectrum to estimate accurately bandwidth and signal-noise-ratio （SNR）,by reason that comers are important information in power spectrum. Theoretical analysis and simulation are carried out for the selection of sampling frequency and detection ability for multi-signals and performance for various modulation signals, The results show that the new algorithm without prior information has lower computational complexity and more accurate estimation, which are proper for hardware implementation.