Two MCS Selection Rules in LDPC Coded AMC-OFDM System
Zhou Ming-yu; Li Li-hua; Lu Wei-jia; Tao Xiao-feng; Zhang Ping
Key Laboratory of Universal Wireless Communication of Ministry of Education at Beijing University of Posts and Telecommunications, Wireless Technologies Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China
Abstract：A Low Density Parity Check (LDPC) coded Adaptive Modulation and Coding- Orthogonal Frequency Division Multiplexing (AMC-OFDM) system is proposed, and its theory is given in detail. In order to solve the problem that the traditional Modulation and Coding Scheme (MCS) selecting rule improves the performance limitedly, two MCS selecting rules are proposed for the AMC system, in which MCS for an adaptive block is determined by the posteriori Signal-to-Noise-Ratio (SNR) of units in the block. Throughput performance is analyzed for the two rules. Simulation results show that they can bring to much higher throughput than the traditional method when applied in LDPC coded AMC-OFDM system.
2008, Vol. 30 
