二维码（扫一下试试看！） | | 一种基于扩频信号的散射通信信噪比估计方法 | | A Novel SNR Estimation Method Based on Spread Spectrum Signal in Troposcatter Communication | | 投稿时间：2020-09-08 | | DOI：10.15918/j.tbit1001-0645.2020.142 | | 中文关键词:散射通信信噪比估计多径信道频率选择性衰落 | | English Keywords:troposcatter communicationSNR estimationmultipath channelfrequency selection fading | | 基金项目:国家自然科学基金资助项目（61504124） | | | 摘要点击次数:314 | | 全文下载次数:189 | | 中文摘要: | | 针对散射多径衰落信道下信噪比估计误差较大的问题，提出一种基于扩频信号的信噪比估计方法，该方法在散射通信信道模型的基础上，给出散射通信信噪比估计方案并设计数据帧结构，提出基于扩频信号的信噪比估计方法并给出合路信噪比计算公式，同时提出采用特定接收信号处理算法的等效信噪比计算方法，用于准确表征散射通信中的有效信噪比.仿真结果表明该信噪比估计方法估计准确，等效信噪比计算方法正确有效，相比其他信噪比估计方法，估计范围更宽，可有效解决多径信道信噪比准确估计问题. | | English Summary: | | To solve the problem that the signal to noise ratio(SNR) estimation error is large in the scattering multipath fading channel,a novel SNR estimation method based on spread spectrum signal was presented.Firstly,a troposcatter communication SNR estimation model was established to provide the scheme of SNR estimation and the data frame structure.Then,according to the characteristics that linearity frequency modulation(LFM) signal could separate multipath,a SNR estimation method based on spread spectrum signal was put forward,and the calculating formula of combined SNR was presented.Meanwhile an equivalent SNR calculation method based on specific received signal processing algorithm was proposed to represent the actual SNR in communication.The simulation results show that the method can provide accurate SNR estimation,the calculation method of equivalent SNR can educe more correct results and suit for a wider estimation range compared with other SNR estimation methods,can effectively carry out accurate SNR estimation of multipath channel. | | 查看全文查看/发表评论下载PDF阅读器 | |
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