Improved interleaver design for turbo coded intersymbol interference channels

Ehtiati, N.; Ghrayeb, Ali; Soleymani, M.R.

doi:10.1109/vetecf.2003.1285033

Cited by 5 publications

(7 citation statements)

References 10 publications

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“…Unfortunately, as we will demonstrate later by examples, the S-random interleaver may improve the multiplicity of the minimum distance but there is no guarantee that it will always enhance the minimum distance itself, especially for high code rates over ISI channels. As a matter of fact, other interleaver design techniques were considered as well for this code system in Reference [10], where a similar observation regarding the lack of distance enhancement was experienced.…”

Section: Introductionmentioning

confidence: 92%

“…Moreover, other interleaver design methods have also been considered in Reference [10] for the SCC code system under consideration, including the so called code-matched interleaver introduced by Feng et al [13] and an enhanced S-random interleaver introduced by Souvignier et al [14]. In Reference [13], the interleaver is designed according to the distance spectrum of the code, where an additive white Gaussian noise (AWGN) channel is assumed.…”

Section: Comments On the Interleaver Designmentioning

confidence: 99%

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On the performance of turbo equalization for precoded ISI channels

Ghrayeb

El-Tarhuni

2006

Wireless Communications

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In this paper, we present a semi-analytical approach for analyzing the serial concatenation (SCC) of a high rate convolutional code and a precoded intersymbol interference (ISI) channel. The significance of the proposed approach is that it can be used to identify, for a given outer high rate code and fixed ISI channel, the precoder that results in the lowest error rate floor. In estimating the bit error performance in the floor region, we use analytical techniques developed for trellis codes to compute the overall system minimum squared Euclidean distance, and then use a semi-analytical approach to find the corresponding multiplicity. We also demonstrate via simulations that the proposed technique may be extended to fading ISI channels with favorable results. We give examples that support our analysis. where he is an assistant professor. His research interests include digital and wireless communications, channel coding, turbo codes, space-time codes and signal processing and coding for data transmission and storage. He has published over 45 refereed technical papers in the above research areas. He has served/is serving on the Technical Program he was a member of Scientific Staff and a senior CDMA designer at the Wireless Technology Labs at Nortel Networks, Ottawa, where he was involved in the development of advanced algorithms for CDMA systems and modem design issues. He has one patent issued on PN code synchronization and three patent applications under review. Since August 2000, he has been with the Electrical Engineering Department at the American University of Sharjah, U.A.E., where he is an assistant professor of Electrical Engineering and the Director of the Cisco Academy at AUS. His current research interests are in the wireless communications area, CDMA technology, PN code synchronization, channel estimation and OFDM. 438A. GHRAYEB AND M. EL-TARHUNI

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Section: Introductionmentioning

confidence: 92%

Section: Comments On the Interleaver Designmentioning

confidence: 99%

On the performance of turbo equalization for precoded ISI channels

Ghrayeb

El-Tarhuni

2006

Wireless Communications

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“…2 and 3; one may have to use results from the theory of -random interleaving in order to fully analyze the bit-error rate (BER) characteristic of the B-GLDPC scheme [25], [26].…”

Section: A the Construction Of B-gldpc Codesmentioning

confidence: 99%

Generalized low-density parity-check codes for optical communication systems

Djordjević

Milenković

Vasić

2005

J. Lightwave Technol.

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Abstract-This paper is concerned with investigating the performance of regular and irregular, randomlike and structured generalized low-density parity-check (GLDPC) codes for long-haul transmission. The proposed GLDPC codes outperform currently known turbo and low-density parity-check (LDPC) coding schemes with comparable parameters utilized in optical communication systems. For a GLDPC coding scheme with 23.6% redundancy, the largest so far reported coding gain of at least 11 dB (at 40 Gb/s) is demonstrated.

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“…In contrast to the approaches of [7]- [10], our EA is capable of achieving an MHD w that is limited only by the degree of freedom offered by the interleaver's length N b . By removing all artificial limits on the MHD w, our EA achieves lower error floors than all previous approaches, even if only a modest EA complexity can be afforded, as demonstrated in Section III.…”

mentioning

confidence: 99%

“…Since this approach increased the associated MHDs to a certain degree [4], the corresponding error floors were slightly improved. By contrast, the Code Matched Interleaver (CMI) of [10] was specifically designed to improve the MHD of a particular SCC, although it was unable to guarantee a MHD above w = 3.…”

mentioning

confidence: 99%