分析了相位连续与不连续移频信号的频谱并比较了它们的带宽。
In this paper, the frequency spectrum and the bandwidth of the frequency shift signal with continuous and discontinuous phase are analyzed.
该方案用平滑的波形来替换前后码元的不连续跳变，从而得到相位连续的时域波形，波形平滑、频谱主瓣窄、滚降速度快。
This scheme uses smooth wave instead of discontinuous wave, so the wave in time field is continuous phase and has good frequency spectrum characteristics.
由于认知无线电系统可能工作在非常宽的频带内，而且频谱一般不连续，所以数据传输方式必须能够自适应这种特性。
As cognitive radio system may work in very large bandwidth, and the spectrum is generally not continuous, so the data transmission must be adaptive to this feature.
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