【摘要】 深入分析了数字通信中常用调制信号的循环自相关特性 ,研究循环自相关同符号率、延时的关系 ,并由此导出了一种估计数字信号符号率的新方法。理论分析和仿真结果表明 ,新的方法不仅具有较小的计算量 ,而且估计的精度较高 ,基本不受信噪比的影响。提出的新方法可用于调制方式识别与调制信号的盲解调 ,有一定的实用价值更多还原

【Abstract】 Cyclic autocorrelation of common digital modulations was investigated, and the relationship between cyclic autocorrelation and delay as well as symbol rate was deduced, then a new estimation algorithm for symbol rates was presented in this paper. Theoretical analyses and simulations show that this new estimation method is characterized by lower computational complexity, less estimation error and independence of noise. The proposed algorithm is of practical value in modulation recognition and blind demodulation.更多还原