| Dual Adaptive Turbo Coded Modulation for Integrated Multimedia Service Transmission |
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| 作者姓名： | 左健存 宋文涛 罗汉文 徐友云 |
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| 作者单位： | DepartmentofElectronicEngineering,ShanghaiJiaotongUniversity,Shanghai,200030 |
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| 基金项目： | 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) |
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| 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 simultaneously to increase the average system throughput substantially. A pragmatic channel-adaptive turbo coded modulation scheme, which comeswithin 2.5 dB of the Shannon limit, is optimally designed,and then a QoS-adaptive scheme is superimposed to buildthe dual adaptive architecture. Simulation results show thatthe novel dual adaption reduces the gap from the fadingchannel capacity to 2 dB when assuming different servicesoccur in equal probability and the service duration followsexponential distribution.
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| 关 键 词： | 双重适应 Terbo编码调制 衰落信道 多媒体服务 光谱效率 QoS |
Dual Adaptive Turbo Coded Modulation for Integrated Multimedia Service Transmission |
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| ZUO Jian-cun,SONG Wen-tao LUO Han-wen,XU You-yun.Dual Adaptive Turbo Coded Modulation for Integrated Multimedia Service Transmission[J].Journal of Donghua University,2004,21(1):72-77. |
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| Authors: | ZUO Jian-cun SONG Wen-tao LUO Han-wen XU You-yun |
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| Institution: | Department of Electronic Engineering, Shanghai J iaotong University, Shanghai, 200030 |
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| Abstract: | 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. |
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| Keywords: | Dual adaption Turbo coded modulation Fading channels Multimedia services Spectral efficiency |
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