摘要
对经典扩频信号信噪比(SNR)估计算法进行分析,提出了一种新的适用于扩频通信系统中频扩频信号信噪比估计算法。该算法在时域估计信号总功率,频域估计噪声功率,时频结合估计出中频扩频信号SNR。在加性高斯白噪声(AWGN)信道下,Matlab仿真结果表明该算法估计精度高,估计范围广及估计下限低。
The paper analyzes the classical SNR estimation algorithm of spread spectrum signal, presents a new SNR estimation algorithm for the spread spectrum communication system before despreading and demodulation. The algorithm estimates the total signal power in time domain and noise power in frequency domain, and estimates SNR of intermediate frequency spread spectrum signal by time-frequency combination. In additive white Gaussian noise （AWGN） channel, the results of Matlab simulation show that the algorithm has such characteristics as high precision, wide range and lower limit.
出处
《无线电工程》
2012年第1期21-23,共3页
Radio Engineering
关键词
信噪比估计
中频
扩频信号
时频结合
SNR estimation
intermediate frequency
spread spectrum signal
time-frequency combination
