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１ 引言有效地利用频谱是数字通信必须解决的一个问题。即使是数字微波通信，可用的频带也非常紧张，因为它比模拟通信占据宽得多的频带。为了更有效地利用资源，解决数字设备与模拟设备的兼容性及防止对邻近信道（特别是对模拟通信）的干扰，对数字微波通信发射机的功率频谱作
1 Introduction The efficient use of spectrum is a problem that digital communications must address. The available frequency band is very tense even with digital microwave communications because it occupies a much wider frequency band than analog communications. In order to make more efficient use of resources, to solve the compatibility between digital devices and analog devices and to prevent interference with adjacent channels (especially for analog communications), the power spectrum of digital microwave communication transmitters