NDLI: Novel technique for scaling down LDPC code lengths in DVB-T2 standard

Content Provider	IEEE Xplore Digital Library
Author	Newagy, F.A. Elramly, S.H.
Copyright Year	2012
Description	Author affiliation: Department of Electronics and Communications Engineering, Faculty of Engineering, Ain Shams University, Cairo, Egypt (Newagy, F.A.; Elramly, S.H.)
Abstract	The paper proposes an approach to scale-down the LDPC code length, thus saving memory and processing power, without significantly sacrificing the code robustness. the paper describes how to use specific Low Density Parity Check (LDPC) codes for Digital Video Broadcasting Terrestrial Second Generation DVB-T2. While the original LDPC codes are rather long 16200 bits and 64800 bits, we propose to reduce their size (about 3k instead of 16k). To reduce the encoder/decoder complexity, the scaled down LDPC codes based on DVB-T2 of length 16200 are proposed in this paper. Scaling the codes may lead to the problems of girth-4 and low weight codes. This paper analyzed the possible reasons leading to the problems, and proposed the optimum scaled down LDPC codes of DVB-T2 that avoid girth-4 and low weight codes. The simulation results in the AWGN channel show that for code rate ½ at BER = $10^{−5},$ LDPC DVB-T2_3240 requires only additional 0.5dB above that required by DVB-T2_16200 and the proposed scaled down code by 5 still has no error floor as well as the former codes in [10]. The impact of the paper is not restricted to DVB-T2 systems, but also to DVB-S2 and all future technologies which are to adopt LDPC.
Starting Page	180
Ending Page	184
File Size	326691
Page Count	5
File Format	PDF
ISBN	9781467327800
e-ISBN	9781467327817
e-ISBN	9781467327794
DOI	10.1109/TEMU.2012.6294713
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-30
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Minimum weight Minimum Sum Algorithm (MSA) Bit error rate Generators Decoding DVB-T2 standard LDPC codes Iterative decoding Standards Sum Product Algorithm (SPA) Digital video broadcasting Girth-4
Content Type	Text
Resource Type	Article

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