Research On Extended Application Of Analogue Trunked Radio System

Trunked mobile communication system, as one kind of professional trunked radio, is an important branch of mobile communication system, and is widely used in many special domains. Trunked mobile communication system is an advanced seedtime of the professional wireless scheduling communication, with the characteristic of common channel, high frequency spectrum efficiency, scheduling function, and flexibility of control. With the development of the economy and society, more and more requirements are put forward to the trunked radio system, and it is also growing up in the direction of standardization, digitalization and variety.Trunked radio system comprises analogue and digital system, and digital trunked radio system is the trend of further development. However, analogue trunked radio system will still be used in a quite long time, therefore improving existing equipments to satisfy the requirement of modern communication, by extending and updating functions, becomes the problem to be solved. This thesis introduces some ways of extended application, which make analogue radio system more widely and variously used.This thesis concretely introduces the extended application by two projects. Realizing wireless data transmission by adding digital signaling to analogue radio system, combined with RFID technique, designs wireless patrol system; Introducing conception of frequency-hopping, combined with data transmission technique, designs an effective audio scramble system, which improving the security of trunked system.The circuit and the code in the paper are validated in practice. The sample fit the target in practice.