Novel Channel Estimation of Reference Signal Reconstruction for DTMB-based Passive Radar

作者：Wan Xianrong; Cheng Yiyao; Yi Jianxin; Zhang Xun

来源：Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology, 2017, 39(5): 1044-1050.

DOI：10.11999/JEIT160796

• Accuracy of channel estimation
• Least squares algorithm
• Matching pursuit algorithms
• Multimedia broadcasting
• Passive radars
• Real data processing
• Reference signals
• Time-domain correlation

The steady reference signal reconstruction is one of the key technologies of passive radar with digital waveform, and the accuracy of channel estimation is directly related to the reference signal purity. To deal with the problem of reference signal reconstruction for Digital Terrestrial Multimedia Broadcasting (DTMB) based passive radar when the receiving system samples at a non-integer multiples of the symbol rate, an improved channel estimation is proposed on the basis of matching pursuit algorithm which is based on the compression perception. Simulation results show that compared to the widely used time domain correlation algorithm and the Least Squares (LS) algorithm, the improved algorithm has better frequency adaptability and robustness, and performs superiorly in various channel environments. Real data processing results further demonstrate that it significantly raises the quality of the reconstructed signal using the proposed algorithm and provides a better condition for the target detection.

• 出版日期2017