数字对讲机协议的制定是当前研究的热点, 而信道编译码技术又是数字对讲机的关键技术之一。DCR系统吸收了dPMR系统的信道编译码方式的优点, 同时采用删除卷积码纠错技术, 提高了对传输差错的控制能力。对基于DCR协议的编译码方案和删除卷积码的编译码方法进行了研究, 对不同编译码方式的误码率进行了深入分析。仿真结果表明:在多径衰落信道下, 删除卷积码可以有效的纠正突发错误, 大大降低误码率。
The formulation of digital intercom agreement is the hot issue of current research, and channel codec technology is one of the key technologies of digital intercom.The DCR system has adopted the advantages of dPMR system channel encoding scheme.Meanwhile, the DCR system uses the punctured convolutional code error correction technology, improving the ability to control channel transmission errors.In this paper, the codec scheme and the punctured convolution codec based on DCR protocol method are studied, and the ber of the different kinds of error correction codec technique is analyzed in detail.The simulation results indicate that, the punctured convolution codec can correct the burst errors effectively and reduce the error rate significantly in the multipath fading channel.
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