非归零型差分相位调制信号建模与仿真分析 ，利用贝叶斯原理估计混合logit模型的参数，计算目标和海洋回波的功率谱密度。- NRZ type differential phase modulation signal modeling and simulation analysis, Bayesian parameter estimation principle mixed logit model, Calculating a target and ocean echo power spectral density.