In a digital channelized receiver with polyphase filter architecture,high data extraction rate leads to low time resolution in sub-channel,which affects the measurement accuracy of time of arrival(TOA).In view of the above problem,this paper proposes a TOA measurement method based on sliding discrete Fourier transform(DFT)and Haar wavelet transform.In the method,the original sampled data are cut by rough value of TOA and frequency measured through channelized receiver,and sliding DFT & modulus calculation are guided in corresponding channel.Then,Haar wavelet transform is used to detect the modulus value and accurate value measured of TOA is fetched.This paper analyzes the amount of resources consumed by the method,and validates the ef-fectiveness of the method in raising the measurement precision of TOA through simulative test.
关键词
信道化接收机/到达时/滑动离散傅里叶变换/Haar小波变换
Key words
channelized receiver/time of arrival/sliding discrete Fourier transform/Haar wavelet transform
维普
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