Abstract:Like phase coded signals, when processed by match filtering, MSK spectrum signals will have higher sidelobes which affects the detection of weak targets. Phase coded signals usually use the iteratively reweighed least square algorithm to suppress sidelobes. When this algorithm is applied to MSK spectrum signals for sidelobe suppression, it is found that the ratio of mainlobe to sidelobe can be improved significantly. The simulation results show that the ratio of mainlobe to sidelobe has been raised over 10 dB while the loss of SNR is only around 1 dB.