【作者】 赵光玲； 束锋； 吴乐南；

【Author】 Zhao Guangling Shu Feng Wu Lenan (Dept.of Radio Engineering of Southeast University)

【机构】 东南大学无线电工程系；

【摘要】 数字调幅广播(DAMB)需要高速的数据传输率,为此本文提出一种具有高带宽效率的编码调制方案。采用多级码(MLC)作为纠错编码,其分量码为Turbo码,采用16差分幅度相位(16DAPSK)加正交频分复用(OFDM)调制,系统具有高的带宽利用率,抗多径,接收端可以并行解码,以减小通常逐层解码所带来的大的时延和误差传播,并且由于差分调制的引入,接收端可以采用非相关检测,毋须均衡器,简化了接收机的设计。更多还原

【Abstract】 Digital amplitude modulation broadcasting(DAMB) needs high data rate transmission,so a coded orthogonal frequency division multiplex(COFDM) plus 16DAPSK modulation scheme of high bandwidth efficiency is presented in this paper.In this scheme Turbo code as the component code is used in each level.A parallel decoding technique can be used due to the inherent bit interleaved property of MLC to reduce the latency and avoid error propagation of ordinary multistage decoding(MSD) and at the same tune with the application of differential modulation a non-coherent detection can be used and no channel equalization is needed so the complexity of receiver designing is reduced consequently.更多还原