Symbol mapping diversity design for multiple packet transmissions

In this paper, we present a simple, but effective method of enhancing and exploiting diversity from multiple packet transmissions in systems that employ nonbinary linear modulations such as phase-shift keying (PSK) and quadrature amplitude modulation (QAM). This diversity improvement results from re...

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Bibliographic Details
Published in:IEEE transactions on communications 2005-05, Vol.53 (5), p.810-817
Main Authors: Samra, H., Ding, Zhi, Hahn, P.M.
Format: Article
Language:English
Subjects:
Adaptation
Amplitude modulation
Applied sciences
Automatic repeat request
Automatic repeat request (ARQ)
AWGN
Bit error rate
Channels
Diversity methods
Diversity reception
Exact sciences and technology
fading channels
Mapping
Modulation
Optimization
Packet transmission
Phase modulation
Phase shift keying
Protocols
quadratic assignment problem (QAP)
Quadrature amplitude modulation
retransmission diversity
symbol mapping diversity
Symbols
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:In this paper, we present a simple, but effective method of enhancing and exploiting diversity from multiple packet transmissions in systems that employ nonbinary linear modulations such as phase-shift keying (PSK) and quadrature amplitude modulation (QAM). This diversity improvement results from redesigning the symbol mapping for each packet transmission. By developing a general framework for evaluating the upper bound of the bit error rate (BER) with multiple transmissions, a criterion to obtain optimal symbol mappings is attained. The optimal adaptation scheme reduces to solutions of the well known quadratic assignment problem (QAP). Symbol mapping adaptation only requires a small increase in receiver complexity but provides very substantial BER gains when applied to additive white Gaussian noise (AWGN) and flat-fading channels.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2005.847132