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Systematic Luby Transform Codes and their Soft Decoding

Systematic Luby Transform Codes and their Soft Decoding
Systematic Luby Transform Codes and their Soft Decoding
Luby Transform codes (LT) were originally designed for the Binary Erasure Channel (BEC) encountered owing to randomly dropped packets in the statistical multiplexing aided classic wireline-based Internet, where transmitted packets are not affected by the fading or noise of the propagation environment of the wireless Internet. For the sake of transmitting data over the BEC routinely encountered in statistical multiplexing aided wireless Internet - style scenarios, we applied the belief propagation algorithm for decoding LT codes and designed a novel version of LT codes, which we refer to as systematic LT codes. When using soft decoding of the proposed systematic LT code, the decoding process becomes capable of preventing the potentially avalanche-like inter-packet error propagation. For example, the systematic LT(1000,3000) code achieved a BER below 10?5 at Eb/N0 = 3.5dB after six decoding iterations. An even lower Eb/N0 of 2.7dB was required, when using a longer systematic LT(10000,30000) code for transmission over the AWGN channel. In the combined BEC-AWGN channel the BER recorded at the output of the systematic LT(1000,3000) code was about 10?5 at Eb/N0 = 4.5dB, when encounter an erasure probability of Pe = 0.1.
67-72
Nguyen, T.D.
22ded564-059c-49b0-8a19-1988cb244e39
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Nguyen, T.D.
22ded564-059c-49b0-8a19-1988cb244e39
Yang, L-L.
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Nguyen, T.D., Yang, L-L. and Hanzo, L. (2007) Systematic Luby Transform Codes and their Soft Decoding. IEEE SiPS'07, China. 17 - 19 Oct 2007. pp. 67-72 .

Record type: Conference or Workshop Item (Paper)

Abstract

Luby Transform codes (LT) were originally designed for the Binary Erasure Channel (BEC) encountered owing to randomly dropped packets in the statistical multiplexing aided classic wireline-based Internet, where transmitted packets are not affected by the fading or noise of the propagation environment of the wireless Internet. For the sake of transmitting data over the BEC routinely encountered in statistical multiplexing aided wireless Internet - style scenarios, we applied the belief propagation algorithm for decoding LT codes and designed a novel version of LT codes, which we refer to as systematic LT codes. When using soft decoding of the proposed systematic LT code, the decoding process becomes capable of preventing the potentially avalanche-like inter-packet error propagation. For example, the systematic LT(1000,3000) code achieved a BER below 10?5 at Eb/N0 = 3.5dB after six decoding iterations. An even lower Eb/N0 of 2.7dB was required, when using a longer systematic LT(10000,30000) code for transmission over the AWGN channel. In the combined BEC-AWGN channel the BER recorded at the output of the systematic LT(1000,3000) code was about 10?5 at Eb/N0 = 4.5dB, when encounter an erasure probability of Pe = 0.1.

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More information

Published date: 2007
Additional Information: Event Dates: 17-19 October 2007
Venue - Dates: IEEE SiPS'07, China, 2007-10-17 - 2007-10-19
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 263909
URI: http://eprints.soton.ac.uk/id/eprint/263909
PURE UUID: a3e9933d-1789-4fee-b006-2572be545887
ORCID for L-L. Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 20 Apr 2007
Last modified: 17 Dec 2019 02:03

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