OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
Video Processing and Communications
Video Processing and Communications
Convex Optimization
Fundamentals of wireless communication
Fundamentals of wireless communication
Handbook of Image and Video Processing (Communications, Networking and Multimedia)
Handbook of Image and Video Processing (Communications, Networking and Multimedia)
Cross-layer multiuser resource allocation for video communication over OFDM networks
Computer Communications
Unequal power allocation for JPEG transmission over MIMO systems
IEEE Transactions on Image Processing
Optimal designs for space-time linear precoders and decoders
IEEE Transactions on Signal Processing
Transmit beamforming in multiple-antenna systems with finite rate feedback: a VQ-based approach
IEEE Transactions on Information Theory
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In this paper, we propose novel algorithms for optimal power allocation towards video transmission in orthogonal frequency division multiple access (OFDMA) and multiple-input multiple-output (MIMO)-based 4G networks. A unique feature of the schemes is that they employ diversity dependent subcarrier power distribution relying on a discrete wavelet transform (DWT)-based hierarchical video decomposition, with exclusively order statistics-based partial channel state information (CSI). This is formulated as a convex minimisation problem and closed form expressions are derived for diversity-based optimal power allocation. We also propose novel algorithms for diversity order-based optimal power allocation for video transmission in MIMO systems. Further, we consider a practical MIMO scenario and employ a limited feedback technique utilising the index of the quantised beamforming vector. A closed form expression for the optimal power allocation is presented based on an iterative convex optimisation framework. Simulation results demonstrate superior performance of the proposed optimal power allocation schemes.