| 一种新的扩频信号信噪比估计算法 |
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| 引用本文： | 林文长,赵维维.一种新的扩频信号信噪比估计算法[J].无线电工程,2012,42(1):21-23. |
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| 作者姓名： | 林文长 赵维维 |
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| 作者单位： | 电子科技大学电子工程学院,四川成都,611731 |
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| 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。
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| 关 键 词： | 信噪比估计 中频 扩频信号 时频结合 |
A New Spread Spectrum Signal SNR Estimation Algorithm |
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| LIN Wen-chang,ZHAO Wei-wei.A New Spread Spectrum Signal SNR Estimation Algorithm[J].Radio Engineering of China,2012,42(1):21-23. |
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| Authors: | LIN Wen-chang ZHAO Wei-wei |
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| Affiliation: | (School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu Sichuan 611731, China) |
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| Abstract: | 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. |
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| Keywords: | SNR estimation intermediate frequency spread spectrum signal time-frequency combination |
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