NGB-W系统中基于星座旋转的BICM的实现与性能分析  

Implementation and Analysis of Rotated Constellations BICM Performance in NGB-W System

作　　者：石春燕[1] 宋荣方[1] 

机构地区：[1]南京邮电大学,江苏南京210000

出　　处：《电视技术》2015年第5期101-103,108,共4页Video Engineering

基　　金：国家"863"计划项目(2011AA01A105)

摘　　要：下一代无线广播网(Next Generation Broadcast-Wireless,NGB-W)中,利用复平面星座点的星座旋转以及星座点的同相分量与正交分量的交织,提出了一种更为有效的比特交织编码调制(Bit Interleaved Coded Modulation,BICM)技术方案。发送端采用这种比特交织编码调制技术,接收端可以通过引入信号空间分集来提升系统性能。仿真结果表明:由星座旋转带来的系统性能增益随信道的不同、调制阶数的不同以及LDPC编码率的不同而产生差异。A more efficient technical scheme for Bit Interleaved Coded Modulation （BICM） is proposed in the Next Generation Broadcast-Wireless, which uses constellation rotation and interleaving between in-phase and quadrature component in the complex plane. Since this BICM introduces signal space diversity, a better performance is obtained at receiver, and the simulation results show that performance gains would vary depending on the different channel models, modulation orders and the different coding rates.

关 键 词：下一代无线广播网 星座旋转 循环延迟 信号空间分集 调制 信道 低密度奇偶校验编码 

分 类 号：TN929.5[电子电信—通信与信息系统]