The invention discloses a multi-channel blind symbol estimation method of linear mixed digital modulation signal rate, mixed signal symbols using the method of multi-scale wavelet transform a rough estimate of the received rate; then the same tectonic cycle cycle frequency of different delay autocorrelation feature vector; according to the cycle frequency interval appropriate symbol wavelet transform rough estimate of income finally, at a given rate; through the calculation of the received signal frequency search interval cycle maximum autocorrelation feature vector model to search the linear mixture of the symbol rate of digital modulation signals. The method of the wavelet transform and the cyclic autocorrelation is applied to multi channel digital modulation signal symbol rate estimation, solves the estimation problem of current rate symbol multiple modulation mode mixed signals in a communication system, with the estimated speed, when SNR is low still has high estimation precision.
【技术实现步骤摘要】
【技术保护点】
一种多路线性混合数字调制信号的盲符号率估计方法，其特征在于首先利用多尺度小波变换粗略估计接收到的混合信号符号率；然后构造相同循环频率不同延时的循环自相关特征向量；根据小波变换粗略估计所得符号率选择合适的循环频率区间；最后，通过在给定的频率搜索区间内计算接收信号循环自相关特征向量模的最大值来搜索线性混合数字调制信号的符号率，其步骤如下：（１）将ｎ个信源数据分别调制到载波上，形成ｎ路数字调制信号；（２）对调制后的ｎ路数字信号进行线性混合，经模拟射频处理通过信道发射出去；（３）在接收终端接收上述经过无线信道传播出的线性混合数字调制信号再模拟处理并数字化，转换为中频信号；（４）利用...
【技术特征摘要】
【专利技术属性】
技术研发人员：左珍勇，刘凯，扈文斌，郑舒辉，
申请(专利权)人：上海大学，
类型：发明
国别省市：31[中国|上海]
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