Multirate systems and filter banks
Multirate systems and filter banks
Principles of mobile communication (2nd ed.)
Principles of mobile communication (2nd ed.)
Error-resilient transcoding for video over wireless channels
IEEE Journal on Selected Areas in Communications
Bit allocation for joint source/channel coding of scalable video
IEEE Transactions on Image Processing
Overview of fine granularity scalability in MPEG-4 video standard
IEEE Transactions on Circuits and Systems for Video Technology
A framework for efficient progressive fine granularity scalable video coding
IEEE Transactions on Circuits and Systems for Video Technology
Rate-distortion optimized layered coding with unequal error protection for robust Internet video
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Mobile Computing
Constellation-rotated vector OFDM and its performance analysis over Rayleigh fading channels
IEEE Transactions on Communications
Modulated Coded OFDM Systems with Special Precoder
Wireless Personal Communications: An International Journal
International Journal of Communication Systems
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Orthogonal Frequency Division Multiplexing (OFDM) has been applied in broadband wireline and wireless systems for high data rate transmission where severe intersymbol interference (ISI) always occurs. The conventional OFDM system provides advantages through conversion of an ISI channel into ISI-free subchannels at multiple frequency bands. However, it may suffer from channel spectral nulls and heavy data rate overhead due to cyclic prefix insertion. Recently, a new OFDM framework, the precoded OFDM, has been proposed to mitigate the above two problems through precoding and conversion of an ISI channel into ISI-free vector channels. In this paper, we consider the application of the precoded OFDM system to efficient scalable video transmission. We propose to enhance the precoded OFDM system with adaptive vector channel allocation to provide stronger protection against errors to more important layers in the layered bit stream structure of scalable video. The more critical layers, or equivalently, the lower layers, are allocated vector channels of higher transmission quality. The channel quality is characterized by Frobenius norm metrics based on channel estimation at the receiver. The channel allocation information is fed back periodically to the transmitter through a control channel. Simulation results have demonstrated the robustness of the proposed scheme to noise and fading inherent in wireless channels.