Results 111 to 120 of about 826 (159)

Low-density parity-check (LDPC) coded OFDM systems with M-PSK

Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367), 2003
Orthogonal frequency division multiplexing (OFDM) is a very attractive technique to achieve the high-bit-rate transmission required for future mobile communications. To improve the error rate performance of OFDM, forward error correction coding is essential.
Hisashi Futaki, Tomoaki Ohtsuki
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Low density parity check (LDPC) codes for optical data storage

International Symposium on Optical Memory and Optical Data Storage Topical Meeting, 2003
Low-density parity check (LDPC codes, first introduced by Gallager (1962), are error-correcting codes based on very sparse parity check matrices. Recently, in the wake of excellent performance of turbo codes, LDPC codes were rediscovered as another category of random codes approaching the Shannon capacity limit with practical decoding complexity ...
V. Bhagavatula, null Hongwei Song, null Jingfeng Liu   +2 more
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On implementation of min-sum algorithm for decoding low-density parity-check (LDPC) codes

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE, 2004
This paper is concerned with the implementation issues of the so-called min-sum algorithm (also referred to as max-sum or max-product) for the decoding of low-density parity-check (LDPC) codes. The effects of clipping threshold and the number of quantization bits on the performance of the min-sum algorithm at short and intermediate block lengths are ...
Farhad Zarkeshvari, Amir H. Banihashemi
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Low complexity iterative decoding algorithm for low-density parity-check (LDPC) codes

2008 1st IFIP Wireless Days, 2008
The reliability ratio weighted based bit-flipping (RRWBF) algorithm for decoding low-density parity-check (LDPC) codes has recently been developed to provide the best performance among all existing bit-flipping based algorithms. The implementation efficient reliability ratio weighted based bit-flipping (IERRWBF) algorithm speedup the original algorithm
Hany R. Zeidan, Maha Mohamed Elsabrouty
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Bootstrapped Iterative Decoding Algorithms for Low Density Parity Check (LDPC) Codes

2010 Fifth International Conference on Systems and Networks Communications, 2010
Reliability ratio based weighted bit-flipping algorithm is one of the best hard decision decoding algorithms in performance. Recently several modifications are done to this technique either to improve performance or to lower the complexity. The implementation efficient reliability ratio based weighted bit-flipping is developed targeting decreasing ...
Albashir Adel Mohamed, Maha Mohamed Elsabrouty, Salwa Hussien El-Ramly   +2 more
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Optimized low-density parity-check (LDPC) codes for bandwidth efficient modulation

2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484), 2003
In this paper, we implement an efficient MLC/PDL system for AWGN channels. In terms of the tradeoff between hardware implementation and system performance, proposed LDPC code is optimized by Gaussian approximation (GA) according to the rate of each level assigned by the capacity rule and chosen as the component code.
null Yu Yi, null Moon Ho Lee
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Concatenated low density parity check (LDPC) codes for magnetic recording channels

Digest of INTERMAG 2003. International Magnetics Conference (Cat. No.03CH37401), 2004
In this paper discussed for magnetic recording channels, a concatenated LDPC coding scheme which employs a column weight LDPC inner code and an outer LDPC code with large column weight to handle the residual errors.
null Hongwei Song, null Jingfeng Liu, B.V.K. Vijaya Kumar   +2 more
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Low-Density Parity-Check (LDPC) Codes

2012
In this chapter, low-density parity-check (LDPC) codes, a class of powerful iteratively decodable error correcting codes, are introduced. The chapter first reviews some basic concepts and results in information theory such as Shannon’s channel capacity and channel coding theorem. It then overviews the Flash memory channel model.
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Effects of 2-D interleaving and Low Density Parity Check (LDPC) Codes on Burst Errors

Optical Data Storage, 2007
We highlight the importance of interleaver in holographic data storage (HDS) systems corrupted by burst errors. We use the Gilbert-Elliott channel model to generate pages with burst errors and investigate a toroidal interleaving scheme.
Lakshmi D. Ramamoorthy, B. V. K. Vijaya Kumar   +1 more
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Low-density parity-check (LDPC) coded MIMO systems with iterative turbo decoding

2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484), 2003
Transmit diversity schemes have been studied for high spectral-efficiency and high bit-rate transmission, such as multi-input multi-output (MIMO) systems. In the MIMO system, forward error correction coding is essential for high quality communications.
H. Futaki, T. Ohtsuki
openaire   +1 more source