基带PSK信号的编码规律恢复算法

Coding Rule Restoration Algorithm of Base-band PSK Signal

针对基带PSK信号相位抗噪能力弱的特点,文章通过提高相位的直流分量,带通滤波和高阶差分的方法,在信噪比较低的情况下提取到信号的突变信息,实现了编码规律的恢复。文章从理论上分析了算法的实现过程,并进行了仿真试验。仿真结果表明,本文的算法在较低的信噪比下可以实现基带PSK信号的编码规律恢复。

Aiming at the phase characteristic of base-band phase-shift keying（PSK） signal that have low anti-noise ability, this paper successfully extracts the transient information of signal at low SNR by improving the DC component of phase, setting band-pass filter and computing the high order difference of phase,realizes the restoration of the coding rule. The realization process of algorithm, is analyzed in theory, and the simulation results showed the method can restore the base-band PSK rule at low SNR.