这种差异可以用包络来描述，包络的不同可以体现不同被测信号的特点。
The difference can be described by envelope which can show the characteristics of signals.
理论分析表明，CPQPSK信号具有恒定包络。
Theoretical analysis proves that CPQPSK signal has constant envelope.
理论分析表明，CPQPSK信号具有恒定包络。
Theoretical analysis proves that CPQPSK signal has constant envelope.
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