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一、引言调频是目前行之有效的一种通信体制,虽然在我国使用多年,但其强信号抑制弱信号现象的机理迄今尚非我国一些从事调频接收机的研制人员所熟知,值此调频广播和调频移动电台在我国即将蓬勃发展之际,有必要把这现象的机理以及降低其门限值的方法较仔细地进行介绍,望对于从事这方面的工程技术人员有所俾益。此外,利用调频制的强信号抑制弱信号现象,可以较好地解决蜂窝式移动通信网中邻近电台互相干扰的问题,如能找到一种降低调频接收机的强信号抑制弱信号门限值的有效方法,对于设计调频移动通信网也是有帮助的。
I. INTRODUCTION FM is a well-established communication system. Although it has been used for many years in our country, the mechanism of weak signal suppression by strong signal is not yet known by some researchers engaged in FM receivers in our country. And FM mobile radio stations are about to flourish in our country, it is necessary to introduce the mechanism of this phenomenon and the method of lowering its threshold more carefully. It is hoped that it will benefit the engineers and technicians engaged in this field. In addition, the suppression of weak signals by using the strong signal of the FM system can better solve the problems of neighboring stations in the cellular mobile communication network interfering with each other. For example, it is possible to find a way to reduce the weak signal threshold of the strong signal of the FM receiver Effective methods for the design of FM mobile communication network is also helpful.