Sidelobe Suppression of Phase-Coded Radar Based on the Accurate Signal Estimate

Owing to its characteristic of spread spectrum, phase-coded radar has many advantages. So people pay much more attentions to it. However, the reference code is not orthogonal and Doppler frequency exists in radar echoes, as a result, the phase-code radar has higher range sidelobe. This paper will discuss a method of the range sidelobe suppression based on parameter estimation, according to the model of echo signals and observed data. It can be seen from the results of simulation and theoretical analysis that this method is effective and needs less calculation.