摘要
低密度校验码(Low Density Parity Check codes)的重新发现是继turbo码之后信道编码领域又一里程碑事件。LDPC码凭借其优异的性能和较低的译码复杂度,被广泛的运用于各种高速通信系统。本文提出了采用简化高阶QAM的LDPC编码OFDM系统(LDPC-COFDM),在保证高效可靠传输的同时降低了实现复杂度。仿真结果显示这种算法在AWGN和多径衰落信道下均具有良好的性能。
The rediscovery of Low Density Parity Check （LDPC） codes is another milestone after turbo codes in the field of channel coding, LDPC codes have been widely used in many high rate communication systems for their outstanding performance and comparatively low decking complexity. In this paper we propose a simplified QAM algorithm for LDPC code - OFDM systems, which decreases the implementation complexity while maintaining efficient and reliable transmission. Simulation results show that this algorithm works well both in AWGN and multi - path fading channds.
出处
《计算机与数字工程》
2005年第12期5-7,15,共4页
Computer & Digital Engineering
基金
国家自然科学基金资助项目(编号:60390540)
国家高技术研究发展863计划资助项目(编号:2001AA123014)
