低信噪比下基带相位编码信号的脉内特征分析

The analysis of intra-pulse features of baseband phase-coded signals at lower SNR

针对基带相位编码信号相位抗噪能力弱的特点,通过提高相位的直流分量和计算相位的高阶差分,成功地提取到信号的突变信息。为了能在更低的信噪比下恢复出相位编码规律,还对原始相位进行了修正。理论分析了算法的实现过程,并进行了仿真试验。仿真结果表明,新算法在较低的信噪比下可以实现基带相位编码信号的脉内特征分析。

In consideration of the weak ability of baseband phase-coded signals to make phase-based noise resistance, the transient information of signals is successfully obtained through the improvement of the DC component of phase and the computation of the high order difference of phase. In order to restore the phase shift keying rule at lower SNR, the original phase is corrected. Besides, the whole method is analyzed theoretically. The simulation results shows that the intra-pulse features of baseband phase-coded signals at lower SNR can be analyzed with this method.