一种基于小波分析的码元速率估计方法

Code Rate Estimation Based on Wavelet Analysis

针对实际系统中MPSK信号在码元跳变处包络幅度降低,相位跳变不明显,常规算法检测效果不佳的问题。文中提出了一种基于小波变换对MPSK信号进行码元速率估计的新方法。对截获信号进行预处理以减弱跳变处的影响并提高估计的精度。理论分析和实验结果表明,这种算法能有效估计出码元速率,有很高的工程应用价值。

In practical communication systems, MPSK signal envelop falls down and phase hops indistinctly at the hopping point, and the conventional algorithms could not work well. Aiming at the above problems, this paper proposes a new algorithm based on Haar wavelet transform for estimation of the code rate. This algorithm pre-treats the intercepted signal, thus reduces the effects at the hopping point and improves the estimation precision. Both theoretical analysis and experimental results indicate that this algorithm could estimate code rate effectively and is of high application value.