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提出了一种基于DMR标准的零中频CDMR数字对讲机硬件射频电路的实现方法,采用图文结合的方式表达设计思路。给出了CDMR关键技术的解决思路以及实现方法,完成了原理图以及PCB的设计。实验测试结果表明设计满足DMR标准。
Based on DMR standard, this paper presents a method to realize the hardware RF circuit of Zero-IF CDMR digital walkie-talkie. The design idea is expressed by the way of graphic and textual integration. The key ideas of CDMR and its implementation are given, and the schematic diagram and PCB design are completed. Experimental results show that the design meets the DMR standard.