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The widespread use of block-based inter-frame motion estimation for video sequence compression in both MPEG-x and H.26x series of standards is due to its effectiveness and simplicity of implementation. Nevertheless, the high computational complexity of the full-search (FS) algorithm has motivated a host of faster search strategies. This paper not only analyzes the character of main fast search algorithms,...
Model-driven engineering is a software development method to model applications at a high level of abstraction and introduce platform specific details automatically using model transformations. Similarly, models specified in human-readable languages can be mapped automatically onto languages that support the analysis of formal properties. In an industrial context, the transformations that automate...
Orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice for digital video broadcasting-handheld (DVB-H), which is required to operate under high mobility conditions resulting in significant Inter-carrier Interference (ICI). To mitigate ICI, several cancellation schemes have been proposed but they require reliable channel information at the receiver which is quite challenging...
Orthogonal frequency division multiplexing (OFDM) is the modulation scheme of choice for digital video broadcasting-handheld (DVB-H) which is required to operate under high mobility conditions resulting in significant Inter-Carrier Interference (ICI). Under these conditions, the conventional one-tap per subcarrier channel estimation and equalization is suboptimal since it does not account for ICI...
This paper studies efficient complex valued matrix manipulations for multi-user STBC-MIMO decoding. A novel method called Alamouti blockwise analytical matrix inversion (ABAMI) is proposed for the inversion of large complex matrices that are based on Alamouti sub-blocks. Another method using a variant of Givens rotation is proposed for fast QR decomposition of this kind of matrices. Our solutions...
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