A belief-propagation decoder for low-density lattice codes is given which represents messages explicitly as a mixture of Gaussians functions. The key component is an algorithm for approximating a mixture of several Gaussians with another mixture with a smaller number of Gaussians. This Gaussian mixture reduction algorithm iteratively reduces the number of Gaussians by minimizing the distance be...

This paper presents implementation of a soft decision Viterbi decoder suitable for convolution codes with short constraint lengths. The decoder is based on a property of Viterbi algorithm that states “if the survivor paths from all possible states at time n are traced back then with high probability all the paths merge at time n-L where L is the survivor path length”. Pipeline structures are in...

In this paper, the combination of equalization and turbo decoding is studied. In the iterative decoding of a product code in block turbo coding system, the equalization process is performed within the iteration loop. The present study aims to investigate the decision feedback equalizer (DFE) incorporated in the iterative decoding. Simulation results show that the more severe the channel interfe...

Modern wireless communication systems demanding high data rate operating in bandwidth deficient world is using Multiple Input Multiple Output (MIMO) antenna arrangement. MIMO arrangement helping achieving high data rates with a technique of special multiplexing saves bandwidth but needs efficient receivers with manageable hardware. The receivers employing linear equalizers or Decision Feedback ...

Chunks (or phrases) once played a pivotal role in machine translation. By using a chunk rather than a word as the basic translation unit, local (intrachunk) and global (inter-chunk) word orders and dependencies can be easily modeled. The chunk structure, despite its importance, has not been considered in the decoders used for neural machine translation (NMT). In this paper, we propose chunk-bas...

We consider orthogonal space-time block codes (OSTBC) in vehicular environments, where the channels are nonidentically distributed. It is shown that the nonidentical channel statistics lead to nonidentical channel estimation errors, which consequently affect the performance and even the existing receiver structure of OSTBC. We show that the conventional symbol-by-symbol (SBS) decoder of OSTBC i...

To achieve the high data rate requirements of emerging wireless communication technologies, the iterative turbo decoding architecture have been proposed and it requires the use of parallel architectures to implement high throughput Turbo decoder. Turbo decoder consists of SISO decoder, LDPC Decoder, interleaver and deinterleaver. Contention-free Unified parallel Confection and balance schedulin...

In this paper, a Reed–Solomon Product-Code (RS-PC) decoder for DVD applications is presented. It mainly contains two frame-buffer controllers, a (182, 172) row RS decoder, and a (208, 192) column RS decoder. The RS decoder features an area-efficient key equation solver using a novel modified decomposed inversionless Berlekamp–Massey algorithm. The proposed RS-PC decoder solution was implemented...