In principle, to nd the optimal code one needs to optimize the tness functionH with respect to all its 2 m s degrees of freedom, the m s entries of the encoder e i and the m s entries of the decoder dj!, taking into account the m conservation relations for the encoder P i e i = 1 and the s conservation relations for the decoder P ! dj! = 1. However, although the degrees of freedom of the encode...

We propose a low-complexity method approximating a-posteriori probability calculation for high-dimensional multipleantenna systems. This sub-optimal method can be used as a component of an iterative decoder for space-time channels. The proposed method out-performs sphere-decoder based approaches, yet requires lower complexity.

Multiple-input multiple-output (MIMO) systems have been widely acclaimed in order to provide high data rates. Recently Lattice Reduction (LR) aided detectors have been proposed to achieve near Maximum Likelihood (ML) performance with low complexity. In this paper, we develop the fixed point design of an iterative soft decision based LR-aided K-best decoder, which reduces the complexity of exist...

Viterbi Decoder is the dominant module to determining the power consumption of the system. High speed and low power design of Viterbi Decoder with data rate1/2 and convolution encoding with a constraint length K = 9 is presented in this paper. The Proposed Viterbi decoder can be reduce the power consumption without reducing the decoding speed and also increases the length of the bits. The opera...

Most of the reported Distributed Video Coding (DVC) schemes have a high time-delay in decoder which hinders its practical application in real-time systems. In this paper, we propose a novel DVC architecture based on MPI cluster in a practical scene, which includes three major approaches to accelerate decoder: an efficient parallel algorithm for generation of the Side Information (SI), a paralle...

Jin Ho Han et al. 491 An application specific processor for an H.264 decoder with a configurable embedded processor is designed in this research. The motion compensation, inverse integer transform, inverse quantization, and entropy decoding algorithm of H.264 decoder software are optimized. We improved the performance of the processor with instruction-level hardware optimization, which is tailo...