We propose a scalable video broadcasting scheme over MIMO-OFDM systems. The scalable video source layers are channel encoded and modulated into independent signal streams, which are then transmitted from the allocated antennas in certain time-frequency blocks. Each receiver employs the successive group decoder to decode the signal streams of interest by treating other signal streams as interfer...

This study reports error detection experiments in large vocabulary automatic speech recognition (ASR) systems, by using statistical classifiers. We explored new features gathered from other knowledge sources than the decoder itself: a binary feature that compares outputs from two different ASR systems (word by word), a feature based on the number of hits of the hypothesized bigrams, obtained by...

Efficient convolutional coding and decoding algorithms are most crucial to successful operation of wireless communication systems in order to achieve high quality of service by reducing the overall bit error rate performance. A widely applied and well evaluated scheme for error correction purposes is well known as Viterbi algorithm [7]. Although the Viterbi algorithm has very good error correct...

In this paper the performance of product codes based on quadratic residue codes is investigated. Our Proposed Iterative decoding SISO based on a soft permutation decoding algorithm (SPDA) as a component decoder. Numerical result for the proposed algorithm over Additive White Gaussian Noise (AWGN) channel is provided. Results show that the turbo effect of the proposed decoder algorithm is establ...

Abstract— This paper presents FPGA implementation of the Reed-Solomon decoder for use in IEEE 802.16 WiMAX systems. The decoder is based on RS(255,239) code, and is additionally shortened and punctured according to the WiMAX specifications. A Simulink model based on the System Generator (Sysgen) library of low-level Xilinx blocks was used for simulation and hardware implementation. At the end, ...

A soft-decision decoder for an error-correcting block code of Hamming distance d is said to achieve bounded-distance (BD) decoding if its error-correction radius is equal to that of a complete Euclidean distance decoder. The Chase decoding algorithms are reliability-based algorithms achieving BD decoding. The least complex version of the original Chase algorithms (“Chase-3”) uses O(d) trials of...

A 64 state fully parallel Viterbi decoder in 90 nm CMOS technology compatible with WLAN IEEE 802.11 standard is described. Optimisation of different decoder architectures ranging from radix-2 to radix-16 for reaching multi-Gb/s throughput is performed and trade-offs w.r.t. energy efficiency and area are laid out. Best simulated throughput after placement and routing reaches the value of 3.1Gb/s...

This paper proposes a hardware architecture of Kbest-based 4× 4 MIMO decoder that supports up to 256-QAM. The novelties such as Direct Expansion, and 2D Sorter play important roles on reducing the complexity of the decoder. In addition, the most complex operators such as divider and multiplier are eliminated in this design. As compared to the previous works, the proposed decoder achieves the hi...

In this paper we present several extensions of MARIE1, a freely available N -gram-based statistical machine translation (SMT) decoder. The extensions mainly consist of the ability to accept and generate word graphs and the introduction of two new N -gram models in the loglinear combination of feature functions the decoder implements. Additionally, the decoder is enhanced with a caching strategy...

We present a machine translation framework that can incorporate arbitrary features of both input and output sentences. The core of the approach is a novel decoder based on lattice parsing with quasisynchronous grammar (Smith and Eisner, 2006), a syntactic formalism that does not require source and target trees to be isomorphic. Using generic approximate dynamic programming techniques, this deco...