Fountain Codes With PAPR Constraint for Multicast Communications

The Forward Link Only (FLO) merit of fountain codes is utilized to avoid excessive retransmission requests for multicast communications. Two important and basic classes of fountain codes, Random Linear (RL) codes and Luby Transform (LT) codes, are considered in this paper as application layer Forwar...

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Bibliographic Details
Published in:IEEE transactions on broadcasting 2011-06, Vol.57 (2), p.319-325
Main Authors: LEE, Shih-Kai, LIU, Yen-Ching, CHIU, Hsin-Liang, TSAI, Yung-Chih
Format: Article
Language:English
Subjects:
Analytical models
Applied sciences
Broadcasting
Coding, codes
Computer simulation
Decoding
Design engineering
Encoding
Exact sciences and technology
Fountain codes
Information, signal and communications theory
Joining processes
Links
Luby-Transform codes
Mathematical analysis
Multicast
Multiplexing
PAPR
Peak to average power ratio
Quadratic programming
random Linear codes
Signal and communications theory
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Time domain analysis
Transforms
Transmission and modulation (techniques and equipments)
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Summary:The Forward Link Only (FLO) merit of fountain codes is utilized to avoid excessive retransmission requests for multicast communications. Two important and basic classes of fountain codes, Random Linear (RL) codes and Luby Transform (LT) codes, are considered in this paper as application layer Forward Error Correction (FEC) codes. High Peak-to-Average Power Ratio (PAPR) is a notorious physical layer problem in OFDM systems. We take the PAPR constraint into account in the encoding of fountain codes for OFDM multicast communications. We propose a selective mapping (SLM) technique that selects the best P candidates among the QP candidates. This SLM technique performs significant better than the conventional SLM technique that selects the best candidate among the Q candidates. Mathematical analysis and computer simulation verify the excellence of our designs.
ISSN:0018-9316
1557-9611
DOI:10.1109/TBC.2011.2104690