Joint TTCM-VLC-Aided SDMA for Two-Way Relaying Aided Wireless Video Transmission
Joint TTCM-VLC-Aided SDMA for Two-Way Relaying Aided Wireless Video Transmission
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DOI：
10.1109/vtcfall.2013.6692262
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
A. Aljohani;S. Ng;R. Maunder;L. Hanzo
中科院分区：
文献类型：
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作者：
A. Aljohani;S. Ng;R. Maunder;L. Hanzo
提出了一种迭代的信源信道联合编码调制（JSCCM）方案，用于双向中继信道上的鲁棒视频传输。与传统的单向中继方案相比，该系统旨在提高吞吐量、可靠性和覆盖范围。我们考虑一个两用户通信系统，其中用户交换他们的信息与援助的双天线中继节点（RN）。对于每个用户，所提出的无损视频方案包括可变长度码（VLC）编码器和两个Turbo网格编码调制（TTCM）编码器，一个在源节点（SN），一个在RN。该算法利用视频序列的时空冗余性来降低迭代解码的复杂度。解码器的解码收敛行为以及两个SN和RN之间的功率共享比的特征在于与外部信息传输（EXIT）图表的帮助。我们提出的方案表现出9 dB的SNR增益相比，非合作方案，在瑞利衰落信道通信时。
An iterative Joint Source and Channel Coded Modulation (JSCCM) scheme is proposed for robust video transmission over two-way relaying channels. The system advocated was designed for improving the throughput, reliability and coverage area compared to that of conventional one-way relaying schemes. We consider a two-user communication system, where the users exchange their information with the aid of a twin-antenna Relay Node (RN). For each user the proposed lossless video scheme is comprised of a Variable Length Code (VLC) encoder and two Turbo Trellis Coded Modulation (TTCM) encoders one at the Source Node (SN) and one at the RN. The spatio-temporal redundancy of the video sequence is exploited for reducing the iterative decoding complexity. The decoding convergence behaviour of the decoder as well as the power sharing ratio between the two SNs and the RN are characterized with the aid of EXtrinsic Information Transfer (EXIT) charts. Our proposed scheme exhibits an SNR gain of 9 dB compared to the non-cooperative scheme, when communicating over Rayleigh fading channels.