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EXIT-chart aided design of row-permutation assisted twin-interleaver BICM-ID

EXIT-chart aided design of row-permutation assisted twin-interleaver BICM-ID
EXIT-chart aided design of row-permutation assisted twin-interleaver BICM-ID

Twin-interleaver bit-interleaved LDPC coded modulation (BICM) has been widely adopted and studied in the context of digital terrestrial transmission (DTT) systems. Extrinsic-information transfer (EXIT) charts have been used as an analysis tool to evaluate the iterative decoding performance and to design a twin-interleaver BICM system. Since BICM using iterative decoding (BICM-ID) exhibits capacity-approaching decoding performance, developing the conventional twin-interleaver BICM DTT system to a BICM-ID system has also been attempted. When considering the twin-interleaver BICM-ID systems, there are a couple of aspects that should be taken into account. We will demonstrate that anti-Gray mapping should be adopted for improving the iterative decoding performance instead of the classic Gray symbol mapping. However, the previous literature related to designing the associated row-permutation interleaver (RPI) was mainly focused on BICM systems relying on Gray mapping. Hence, we will design the RPI of the twin-interleaver BICM-ID DTT systems using an anti-Gray mapping. Explicitly, we use: 1) the EXIT-chart analysis that accurately visualizes the overall iterative decoding and demapping performance of the twin-interleaver BICM-ID DTT systems using anti-Gray mapping and 2) a preprocessing stage for eliminating duplicate RPI candidates by using a parameter that roughly predicts the EXIT-chart analysis result before the EXIT-chart analysis is involved. By the elimination of the duplicates, over 99% of the initial candidates of the RPIs can be removed from the original {M} ! candidates, where {M} stands for the number of modulated bits in a symbol. Given this drastically reduced number of candidates, the proposed design method finds novel RPIs, having superior bit-error ratio performances over the conventional RPIs in the context of the DVB-T2 standard.

BICM-ID systems, digital terrestrial transmission (DTT) system, EXIT-chart analysis, interleaver, iterative decoding
0018-9316
85-95
Kang, In Woong
fe5cf858-46b0-4232-8d3c-4697e3fe9972
Kim, Hyoung Nam
17a3a657-a70d-460b-a36d-ddeb1191c8ba
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Kang, In Woong
fe5cf858-46b0-4232-8d3c-4697e3fe9972
Kim, Hyoung Nam
17a3a657-a70d-460b-a36d-ddeb1191c8ba
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Kang, In Woong, Kim, Hyoung Nam and Hanzo, Lajos (2018) EXIT-chart aided design of row-permutation assisted twin-interleaver BICM-ID. IEEE Transactions on Broadcasting, 64 (1), 85-95. (doi:10.1109/TBC.2017.2704437).

Record type: Article

Abstract

Twin-interleaver bit-interleaved LDPC coded modulation (BICM) has been widely adopted and studied in the context of digital terrestrial transmission (DTT) systems. Extrinsic-information transfer (EXIT) charts have been used as an analysis tool to evaluate the iterative decoding performance and to design a twin-interleaver BICM system. Since BICM using iterative decoding (BICM-ID) exhibits capacity-approaching decoding performance, developing the conventional twin-interleaver BICM DTT system to a BICM-ID system has also been attempted. When considering the twin-interleaver BICM-ID systems, there are a couple of aspects that should be taken into account. We will demonstrate that anti-Gray mapping should be adopted for improving the iterative decoding performance instead of the classic Gray symbol mapping. However, the previous literature related to designing the associated row-permutation interleaver (RPI) was mainly focused on BICM systems relying on Gray mapping. Hence, we will design the RPI of the twin-interleaver BICM-ID DTT systems using an anti-Gray mapping. Explicitly, we use: 1) the EXIT-chart analysis that accurately visualizes the overall iterative decoding and demapping performance of the twin-interleaver BICM-ID DTT systems using anti-Gray mapping and 2) a preprocessing stage for eliminating duplicate RPI candidates by using a parameter that roughly predicts the EXIT-chart analysis result before the EXIT-chart analysis is involved. By the elimination of the duplicates, over 99% of the initial candidates of the RPIs can be removed from the original {M} ! candidates, where {M} stands for the number of modulated bits in a symbol. Given this drastically reduced number of candidates, the proposed design method finds novel RPIs, having superior bit-error ratio performances over the conventional RPIs in the context of the DVB-T2 standard.

Full text not available from this repository.

More information

Accepted/In Press date: 21 April 2017
e-pub ahead of print date: 29 May 2017
Published date: 1 March 2018
Keywords: BICM-ID systems, digital terrestrial transmission (DTT) system, EXIT-chart analysis, interleaver, iterative decoding

Identifiers

Local EPrints ID: 418783
URI: http://eprints.soton.ac.uk/id/eprint/418783
ISSN: 0018-9316
PURE UUID: 6919446d-a4f4-4bdb-a5c4-d7adbf9f1305
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 22 Mar 2018 17:30
Last modified: 07 Oct 2020 01:33

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