Space-frequency coding reduces the collision rate in FH-OFDMA

A frequency-hopping (FH) space-frequency (SF)-coded clustered orthogonal frequency division multiple access (OFDMA) system is considered. It is shown that SF coding reduces the number of collisions in OFDMA with FH provided that the subcarrier clusters are formed randomly at each hopping instant. An...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2005-09, Vol.4 (5), p.2045-2050
Main Authors: Kurt, T., Delic, H.
Format: Article
Language:English
Subjects:
Applied sciences
Bit error rate
Channels
Clustered orthogonal frequency-division multiplexing (OFDM)
Clusters
Coding
Collision rates
Computational modeling
Exact sciences and technology
Exact solutions
Fading
Frequency conversion
Frequency diversity
Frequency division multiple access
Frequency division multiplexing
frequency hopping (FH)
Interference elimination
Laboratories
Mathematical analysis
OFDM
orthogonal frequency division multiple access (OFDMA)
space-frequency (SF) coding
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Wireless communication
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Description
Summary:A frequency-hopping (FH) space-frequency (SF)-coded clustered orthogonal frequency division multiple access (OFDMA) system is considered. It is shown that SF coding reduces the number of collisions in OFDMA with FH provided that the subcarrier clusters are formed randomly at each hopping instant. Analytical expressions for the collision rate, which is defined as the expected number of collisions per symbol, are derived. Bit error rate (BER) computations via simulations in a frequency-selective fading channel corroborate the theoretical findings for SF-coded FH-OFDMA.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2005.853827