Efficient iterative receiver for LDPC coded wireless IPTV system

Multi-level superposition coded modulation (SCM) is a scalable technique for wireless video broadcast/ multicast, in which iterative turbo structures provide receivers with multi-resolution demodulations subject to a high complexity. Forward error correction using low-density parity-check (LDPC) cod...

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Published in:2011 18th IEEE International Conference on Image Processing pp. 953 - 956
Main Authors: YouZhe Fan, She, James, Chi-ying Tsui
Format: Conference Proceeding
Language:English
Published: IEEE 01.09.2011
Subjects:
Complexity theory
Decoding
Detectors
IPTV
Iterative decoding
LDPC code
Receivers
scalable video
superposition coded modulation
turbo structure
ISBN:1457713047, 9781457713040
ISSN:1522-4880
Online Access:Get full text
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Abstract Multi-level superposition coded modulation (SCM) is a scalable technique for wireless video broadcast/ multicast, in which iterative turbo structures provide receivers with multi-resolution demodulations subject to a high complexity. Forward error correction using low-density parity-check (LDPC) code is helpful for better received video quality but further increasing the receiver complexity. In this paper, a method is proposed to reduce the receiver complexity by using a sequential structure with a faster convergence for demodulation. In addition, the iterative demodulator and the LDPC decoder are jointly designed as a multi-loop iterative structure to reduce the decoding complexity. Experimental results show that up to 67% decoding complexity is reduced and better video quality is achieved at receivers under low signal-to-noise ratios.
AbstractList Multi-level superposition coded modulation (SCM) is a scalable technique for wireless video broadcast/ multicast, in which iterative turbo structures provide receivers with multi-resolution demodulations subject to a high complexity. Forward error correction using low-density parity-check (LDPC) code is helpful for better received video quality but further increasing the receiver complexity. In this paper, a method is proposed to reduce the receiver complexity by using a sequential structure with a faster convergence for demodulation. In addition, the iterative demodulator and the LDPC decoder are jointly designed as a multi-loop iterative structure to reduce the decoding complexity. Experimental results show that up to 67% decoding complexity is reduced and better video quality is achieved at receivers under low signal-to-noise ratios.
Author She, James
Chi-ying Tsui
YouZhe Fan
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  organization: Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China
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  surname: Chi-ying Tsui
  fullname: Chi-ying Tsui
  organization: Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China
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Snippet Multi-level superposition coded modulation (SCM) is a scalable technique for wireless video broadcast/ multicast, in which iterative turbo structures provide...
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StartPage 953
SubjectTerms Complexity theory
Decoding
Detectors
IPTV
Iterative decoding
LDPC code
Receivers
scalable video
superposition coded modulation
turbo structure
Title Efficient iterative receiver for LDPC coded wireless IPTV system
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