Dual Adaptive Turbo Coded Modulation for Integrated Multimedia Service Transmission  

作　　者：左健存 宋文涛 罗汉文 徐友云 

机构地区：[1]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, 200030 [2]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai, 200030his paper proposes a cross-layer dual adaptive coded modulation architecture using turbo codes for mobile multimedia communication, which adapts to both the varying channel characteristics and the QoS of various multimedia services simultancously to increase the average system throughput substantially. A pragmatic channeladaptive turbo coded modulation schcme, which comes within 2.5 dB of the Shannon limit, is optimally designed, and then a QoS-adaptive scheme is superimposed to build the dual adaptive architecture. Simulation results show that the novel dual adaption reduces the gap from the fading channel capacity to 2 dB when assuming different services occur in equal probability and the service duration follows exponential distribution.

出　　处：《Journal of Donghua University(English Edition)》2004年第1期72-77,共6页东华大学学报（英文版）

基　　金：This work is supported by the High Technology Research and Development Program of China(No. 2001AA121031);the National Natural Science Foundation of China (No. 60072028)

摘　　要：This paper proposes a cross-layer dual adaptive coded modulation architecture using turbo codes for mobile multimedia communication, which adapts to both the varying channel characteristics and the QoS of various multimedia services simultancously to increase the average system throughput substantially. A pragmatic channeladaptive turbo coded modulation schcme, which comes within 2.5 dB of the Shannon limit, is optimally designed, and then a QoS-adaptive scheme is superimposed to build the dual adaptive architecture. Simulation results show that the novel dual adaption reduces the gap from the fading channel capacity to 2 dB when assuming different services occur in equal probability and the service duration follows exponential distribution.This paper proposes a cross-layer dual adaptive coded modulation architecture using turbo codes for mobile multimedia communication, which adapts to both the varying channel characteristics and the QoS of various multimedia services simultaneously to increase the average system throughput substantially. A pragmatic channeladaptive turbo coded modulation scheme, which comes within 2.5 Db of the Shannon limit, is optimally designed,and then a QoS-adaptive scheme is superimposed to build the dual adaptive architecture. Simulation results show that the novel dual adaption reduces the gap from the fading channel capacity to 2 Db when assuming different services occur in equal probability and the service duration follows exponential distribution.

关 键 词：Dual adaption Turbo coded modulation Fading channels Multimedia services Spectral efficiency 

分 类 号：TN911.3[电子电信—通信与信息系统]