Rights Creative Commons: Attribution 3.0 Hong Kong License ADAPTIVE SUB-CHANNEL ALLOCATION BASED UEP FOR VIDEO TRANSMISSION IN SPACE-TIME CODED OFDM SYSTEMS

نویسندگان

  • Guang-Hua Yang
  • Dongxu Shen
  • Victor O.K. Li
چکیده

In this work, we introduce the idea of adaptive sub-channel allocation based unequal error protection (ASCA-UEP) to a space-time block coded orthogonal frequency division multiplexing (STBC-OFDM) system. In such a system, UEP is realized by adaptively allocating and transmitting high-priority and low-priority video data over high-quality and low-quality sub-channels, respectively. Further, we propose two ASCA-UEP schemes in a time division duplex (TDD) system: a receiver-based scheme and a transmitter-based scheme. Analysis and simulation results demonstrate that ASCA-UEP greatly enhances the quality of video reception, and the transmitter-based scheme is more robust to uplink channel noise than the receiver-based scheme, and is thus preferred when the receiver is powerconstrained and the transmitter has sufficient power.

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تاریخ انتشار 2005