数字信号处理中相位解卷绕问题分析——使用Matlab语言

对Matlab语言中能够保持复向量相位连续性的两个解卷绕命令unwrap和phase的使用方法进行比较,指出它们之间的不同之处。对其源文件进行深入解读,并举例说明同一信号在这两个命令的作用下所得结果不相符的原因。最后通过修改phase命令的M文件或改变unwrap命令的输入参数使二者的输出达到一致,从而扩大了这两个命令的适用范围。

Study on Phase Unwrapping Problems in DSP Theory

The usage of two phase-unwrapping command(unwrap and phase) for keeping phase continuity of complex vectors in Matlab programming language was compared with each other and the difference was pointed out.Secondly,after their source file was read thoroughly,examples were given to explain the reason why the output of these two commands by the same exciting signal were different from each other.At last,by modifying the M-file of phase command or the input argument of unwrap command,their output could finally be of the same,thus the application scope of these two commands would be extended.