Theoretical analysis proves that CPQPSK signal has constant envelope.
理论分析表明，CPQPSK信号具有恒定包络。
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。
In these situations, one might apply additional input pulse weighting to form a class of MSK type signals which still maintain constant envelope and continuous phase.
在此情况下可以对输入数据符号进行加权处理，从而得到一类MS K信号，这类MS K信号仍为等幅波、相位仍保持连续。
And I'm talking about companies that can produce a relatively constant stream of new technology products like that and are able to constantly push the envelope of what's possible.
这些公司可以持续稳定的研发新的技术，可以不断挑战自己的极限。
Envelope migration of radial target with constant acceleration was researched in chapter four.
第四章对径向匀加速目标的包络走动补偿问题进行了研究。
Envelope migration of radial target with constant acceleration was researched in chapter four.
第四章对径向匀加速目标的包络走动补偿问题进行了研究。
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