Abstract:

The passive bistatic radar obtains reference signal by purifying the direct-path signal and the performance of target detection will highly depend on the purity of the reference signal. According to the special structure of digital radio mondiale (DRM) signals, the paper presents a method of generating the reference signal by reconstructing the transmitted signal. Firstly, the process of the reconstruction algorithm based on the modulation and demodulation theories of the DRM signal is introduced. Secondly, the performance of the reconstruction method is verified by real-life signals. Finally, the paper focuses on analyzing the influence of the bit error rate on the performance of ambiguity function and clutter canceller. The simulation and experimental results show that it is possible to get an ideal reference signal by the reconstruction algorithm and provide a necessary condition for the target detection.