Results 171 to 180 of about 24,779 (216)

Low-Density Parity-Check (LDPC) Coded Framelet Transform-Based OFDM System

Proceedings of the International Conference on Imaging, Signal Processing and Communication, 2017
Framelet Transform-based OFDM (FT-OFDM) was proposed recently as an alternative to traditional Fast Fourier Transform-based OFDM (FFT-OFDM). By using the Framelet Transform, the spectral containment of the channels will be more efficient, since it does not use Cyclic Prefix (CP) that usually used in the traditional model.
Suha Q. Hadi, Phaklen Ehkan, Sameer A. Dawood, M. S. Anuar   +3 more
openaire   +1 more source

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
openaire   +1 more source

DC-free (d, k) constrained low density parity check (LDPC) codes

International Symposium on Optical Memory and Optical Data Storage Topical Meeting, 2003
Recently, turbo codes and low-density parity check (LDPC) codes with iterative soft decoding have been heavily investigated as potential candidates for low-SNR, high-density data storage systems. However, relatively less attention has been devoted to the investigation of (d, k) run-length limited (RLL) constrained LDPC codes, although run-length ...
H. Song, J. Liu, B.V.K.V. Kumar
openaire   +1 more source

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
openaire   +1 more source

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 M. Elsabrouty
openaire   +1 more source

High-speed simulation of partial response channels employing low-density parity check (LDPC) codes

SPIE Proceedings, 2003
We developed a high-speed simulator for partial response (PR) channels employing low density parity check (LDPC) codes. Bit error rate (BER) performances for channels employing PR(1,1) and PR(1,2,2,1) targets wtih blue laser and 0.85 numerical aperture (NA) are estimated by simulating up to 10 11 data sampled which allowed us to estimate BERs as low ...
Toshihiro Horigome, Hongwei Song, Lingyan Sun, Vijayakumar Bhagavatula   +3 more
openaire   +1 more source

Outage-Limit-Approaching Channel Coding for Future Wireless Communications: Root-Protograph Low-Density Parity-Check Codes

IEEE Vehicular Technology Magazine, 2019
A block-fading (BF) channel, also known as a slow-fading channel, is a type of simple and practical channel model that can characterize the primary feature of a number of wireless-communication applications with low to moderate mobility.
Yi Fang, Pingping Chen, Guofa Cai, F. Lau, S. Liew, G. Han   +5 more
semanticscholar   +1 more source

Image Communication Using Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) Code

2020
Proposed quasi-cyclic low-density parity-check code (QC-LDPC) efficiently communicates image at comparable peak signal-to-noise ratio (PSNR) with less signal-to-noise ratio (SNR). Encoding of the image is done using the Gauss–Jordan elimination method while decoding is done using the min-sum iterative message-passing algorithm using the code length ...
Dharmesh Jayantibhai Patel, Pinalkumar Engineer, Ninad Sunilkumar Bhatt   +2 more
openaire   +1 more source

Low Density Parity Check Code (LDPC) for Enhancement of Visible Light Communication (VLC) Performance

2020 International Seminar on Application for Technology of Information and Communication (iSemantic), 2020
Visible Light Communication (VLC) that utilizes free space optics as a transmission channel has a high-speed data communication capability, which uses Light Emitting Diode (LED) as a transmitter. Problems occurred in this wireless communication is the distance. VLC can only reach relatively short distance if compared to Radio Frequency (RF).
Brian Pamukti, Fernaldy Arifin, Nachwan Mufti Adriansyah   +2 more
openaire   +1 more source

Construction of rate-compatible (RC) low-density parity-check (LDPC) convolutional codes based on RC-LDPC block codes

Journal of Shanghai Jiaotong University (Science), 2016
In this paper, a family of rate-compatible (RC) low-density parity-check (LDPC) convolutional codes can be obtained from RC-LDPC block codes by graph extension method. The resulted RC-LDPC convolutional codes, which are derived by permuting the matrices of the corresponding RC-LDPC block codes, are systematic and have maximum encoding memory ...
Liwei Mu, Guojun Han, Zhiyong Liu
openaire   +1 more source