Real Data Processing And Channelized Receiving Of The Coast-ship Bi/Multi-station Radar

In coast-ship Bi/Multi-station ground-wave Radar, multiple frequency-carrier signals are transmitted simultaneously by multiple antennas in the transmitting station, and the transmitting pattern is formed in the receiving station. The signal processing and Channelized receiving of this radar system are discussed in this paper.Firstly, the transmitting signal, which is linear frequency demodulated interrupted continuous wave (FMICW), and the method of gaining range and Doppler information are introduced in this paper. The signal processing flow chart of this radar system is given and the results of real data show this method can obtain the information of range, velocity, azimuth of the target. Then Digital demodulated technology is researched as the most important part. Although the synthetical signal can be separated with the digital low-pass filter, the filter order is too high to real-time process. The channelized receiving technique based on polyphase filters is presented in order to design the channelized receiver for this radar. Compared with low-pass filter channelized receiver, the archetypal filer order can be reduced by N. So this technology is very valuable for the realization of engineering project. And at last we verify the validity of this technology through processing the real data.