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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Vydáno v:2011 18th IEEE International Conference on Image Processing s. 953 - 956
Hlavní autoři: YouZhe Fan, She, James, Chi-ying Tsui
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.09.2011
Témata:
Complexity theory
Decoding
Detectors
IPTV
Iterative decoding
LDPC code
Receivers
scalable video
superposition coded modulation
turbo structure
ISBN:1457713047, 9781457713040
ISSN:1522-4880
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Shrnutí: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.
ISBN:1457713047
9781457713040
ISSN:1522-4880
DOI:10.1109/ICIP.2011.6116719