Results 161 to 170 of about 9,106 (209)
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DC-free (d, k) constrained low density parity check (LDPC) codes
International Symposium on Optical Memory and Optical Data Storage Topical Meeting, 2003Recently, 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
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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), 2004In 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 +2 more
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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), 2003Orthogonal 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.
H. Futaki, T. Ohtsuki
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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), 2003Transmit 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
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Design of low-density parity-check (LDPC) codes for high order constellations
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005In this paper, we propose a simple design of LDPC codes which combines the good properties of multilevel coding (MLC) and bit-interleaved coded modulation (BICM) schemes with Gray-mapped PAM constellations and one-shot demodulation. Through simulations, we show that it performs better than MLC/parallel independent decoding for short-medium lengths ...
H. Sankar +2 more
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Low complexity iterative decoding algorithm for low-density parity-check (LDPC) codes
2008 1st IFIP Wireless Days, 2008The 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
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High-speed simulation of partial response channels employing low-density parity check (LDPC) codes
SPIE Proceedings, 2003We 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 +3 more
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Image Communication Using Quasi-Cyclic Low-Density Parity-Check (QC-LDPC) Code
2020Proposed 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 +2 more
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Low-Density Parity-Check (LDPC) Codes
2012In 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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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 +2 more
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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 +2 more
openaire +1 more source