矿井450MHz无线双工通信的设计方案

Design for a mine mobile full-duplex communication system at 450MHz band

介绍了一种 450MHz 矿井移动通信中基站和手机的射频及基带部分的组成,其特点是简单廉价、功率低、基站和手机的射频部分相同,用TI公司推出16位低功耗单片机MSP430作控制单元,控制单元以时分双工的形式控制该公司的半双工RF芯片TRF4400实现无线全双工通信。介绍了射频和基带的硬件构成,设计了 MSP430 对数据进行采样的方法,阐述了基站和移动台之间建立同步数据链路的过程,给出了用软件实现时分双工的基本思路。

The section for dealing with the signals at both RF and base band in a mine mobile communication system is introduced. Its structure is simple; the cost is low; and its power is low-consuming. Besides, the structure of the section for dealing with the signal at the RF band is the same both for the base station and the mobile phone. The MSP430 microprocessor is employed as the controlling unit, which is produced by Texas Instruments Company. With being controlled by MSP430, the wireless full- duplex communication is set up by TRF4400 chip, which is also a product of TI Company. Here, we introduce the section according to the following aspects: the configuration of the hardware; the technique of sampling the signal by MSP430; the process of the realization of the communication between the base station and the mobile phone; the basic principle of the software design for realizing of the time dividing duplex communication.