Motivated by recent results in joint source-channel coding and decoding, we consider the problem of decoding of variable-length codes using soft channel values. We present results of decoding of selected codes using the maximum a posteriori (MAP) decoder and the sequential decoder, and show the performance gains over decoding using hard decisions alone. The objective behind this work is to prov...

Decoding algorithm is a crucial part in statistical machine translation. We describe a stack decoding algorithm in this paper. We present the hypothesis scoring method and the heuristics used in our algorithm. We report several techniques deployed to improve the performance of the decoder. We also introduce a simpli ed model to moderate the sparse data problem and to speed up the decoding proce...

The proposed design of HDB3 decoding system using FPGA implementation offers an efficient and unfailing decoding at receiving end by sustaining clock data recovery using Direct Digital Synthesis (DDS). The system captures E1/T1 HDB3 encoded tertiary level stream at input, converts it into binary level symbols, FPGA IO reconcilable, and decode and transforms it into synchronized NRZ output. The ...

A common and effective way to train translation systems between related languages is to consider sub-word level basic units. However, this increases the length of the sentences resulting in increased decoding time. The increase in length is also impacted by the specific choice of data format for representing the sentences as subwords. In a phrase-based SMT framework, we investigate different ch...

The ’turbo’ principle has been widely applied to various detection/decoding problems in recent years. Here we show how the general idea can be extended to a communication scheme where a variable length code is used for data compression followed by a channel code to protect the data against channel errors. Iterations are performed between the channel decoder and the decoder for the variable leng...

In this paper, a new hybrid automatic repeat request (ARQ) scheme is proposed for data transmission in a powercontrolled direct sequence (DS) code division multiple access (CDMA) system cellular system. Data frame is composed of interleaved Reed-Solomon codes. The depth of interleaving is determined by a power-control interval. After decoding each codeword with algebraic decoding, the post-deco...

The implementation of an LDPC Decoder for the DVB-S2 standard is a challenging task, specially because of 1) the large parity-check matrices and 2) the iterative decoding algorithm, which may represent a bottleneck within the receiver data flow. This paper presents a pipelined architecture for LDPC decoding based on a semi-parallel implementation of the Minimum-Sum algorithm, a simplification o...

The intermediate network nodes (relays) in Wireless (Physical Layer) Network Coding (WNC) systems are allowed to process only some specific (“hierarchical") functions of user data (instead of separate decoding of individual user signals), which allows to overcome the rate limits induced by the conventional Multiple Access Channels capacity regions. Unfortunately, since the mapping between a spe...

Modern communication systems require robust, adaptable and high performance decoders for efficient data transmission. Support Vector Machine (SVM) is a margin based classification and regression technique. In this paper, decoding of Bose Chaudhuri Hocquenghem codes has been approached as a multi-class classification problem using SVM. In conventional decoding algorithms, the procedure for decod...

We present a table-driven technique for decoding of the convolutionally encoded data. The approach can be used in either the feedback or the direct mode. A data-independent syndrome vector is generated on the transmitted bits. If it is dgferent from zero it is used to address pre-computed tables of corrections for the encoded bits. The decoding is performed as a separate step. When the feedback...