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区别于现有发射正交频分复用(OFDM)多载波波形的谐振区雷达系统(RRRS),提出了拥有比传统OFDM波形更窄频率间隔的密集多载波(DMC)雷达波形.在相同带宽内,DMC波形包含了更多的子载波,从而能提供更高的频率分集.为了进一步提高检测性能,提出了一种新的最优权重累积目标检测(OWATD)方法.该方法采用最佳权重系数来累积不同频率的电磁回波,分析了当回波信噪比(SNR)趋于无穷大时的极限检测性能,并给出了采用DMC的OWATD方法优于采用OFDM的匹配滤波方法的条件.仿真结果表明,DMC的目标检测性能优于OFDM,而且OWATD方法可以进一步提高采用DMC和OFDM波形的传统方法的检测性能.
Different from the existing RRRS for transmitting orthogonal frequency division multiplexing (OFDM) multi-carrier waveforms, a dense multi-carrier (DMC) radar waveform with narrower frequency spacing than the traditional OFDM waveform is proposed. , The DMC waveform contains more sub-carriers, which can provide higher frequency diversity.To further improve the detection performance, a new optimal weighted cumulative target detection (OWATD) method is proposed.The method uses the best weight Coefficient to accumulate electromagnetic echoes of different frequencies and analyze the limit detection performance when the signal-to-noise ratio (SNR) of the echo tends to infinity, and give the condition that the OWATD method using DMC is better than the matched filter method using OFDM. The simulation results show that the target detection performance of DMC is better than OFDM, and the OWATD method can further improve the detection performance of traditional methods using DMC and OFDM waveforms.