基于星座旋转的编码调制系统设计与实现

摘要

本文考虑对旋转的星座映射进行编码调制.首先,考虑将信道编码与调制结合起来设计.编码与调制结合技术的出现,证明这种方法的性能优于编码和调制相互独立的系统,最为典型的编码调制技术当属网格编码调制TCM和比特交织编码调制BICM.同时,该系统还引入星座旋转和坐标交织技术,有效地提高系统在衰落信道下的分集阶数,获得一定的分集增益.最后,通过误码性能仿真,验证该系统的性能.%This paper considers the rotation of the constellation mapping code modulation. First, it considers the channel coding and modulation together to design. Combines coding and modulation technologies, proves that this method is superior to separate coding and modulation systems, the most typical of coded modulation Trellis coded modulation technique is bit-interleaved coded modulation TCM and BICM. At the same time, the system also introduces the constellation rotation and coordinate interleaving technology to improve the system effectively under the fading channel diversity order, get some diversity gain. Finally, through BER performance simulation, it verify the performance of the system.