一种多进制连续相位调制信号的符号定时跟踪方法

A symbol timing tracking algorithm for MCPFSK

针对多进制连续相位调制信号(MCPFSK)的传输系统,提出一种在相位上提取定时误差的符号定时跟踪方法,并分析定时跟踪环路的特性。根据MCPFSK信号特性,接收端将信号差分、鉴相后,利用多进制信号特性提取定时误差。Matlab仿真结果表明,在加性高斯白噪声信道上,该方法能准确地估算出定时偏差,适用于MCPFSK信号的非相干差分解调系统。

A symbol timing tracking algorithm which extracts timing error from phase is proposed for the transmission systems of M-ary continuous phase frequency shift keying （MCPFSK） signals. The characteristic of timing tracking circle is also analyzed. According to MCPFSK signal characteristic, the receiver calculates the phase of differential signals and estimates the timing error based on the characteristic of M-ary signals. Matlab simulation shows that this algorithm can estimate the timing error accurately in the additive white Gaussian noise （AWGN）, and is suitable for noncoherent differential receiving systems of M-ary continuous phase frequency shift keying （MCPFSK） signals.