constant envelope modulation 恒包络调制
modulation envelope 调制波包络线 ; [电子] [通信] 调制包络线
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The offset quadrature phase-shift-keyed(OQPSK) is an effective digital constant envelope modulation for band-limited nonlinear channel.
偏移四相相移键控（OQPSK）是一种适用于在限带非线性信道中使用的高效恒包络数字调制技术。
Most of the modern modulation techniques are jin use of a non-constant envelope modulation, which has a large difference between peak and average.
大多数的现代的调制技术都运用了非恒包络调制方式，并且峰值和平均值相差较大。
Evidently, there is another motion to be concerned with and that is the propagation of the modulation envelope.
显然，还应当考虑另外一种运动，那就是调制包络的传播。
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