Antenna-diversity-assisted genetic-algorithm-based multiuser detection schemes for synchronous CDMA systems

A spatial diversity reception assisted multiuser code-division multiple-access detector based on genetic algorithms (GAs) is proposed. Two different GA-based individual-selection strategies are considered. In our first approach, the so-called individuals of the GA are selected for further exploitati...

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Bibliographic Details
Published in:IEEE transactions on communications Vol. 51; no. 3; pp. 366 - 370
Main Authors: Yen, K., Hanzo, L.
Format: Journal Article
Language:English
Published: New York IEEE 01.03.2003
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
AWGN
Code division multiplexing
Detectors
Diversity reception
Fading
Genetic algorithms
Multiaccess communication
Multiuser detection
Proposals
Receiving antennas
ISSN:0090-6778, 1558-0857
Online Access:Get full text
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Summary:A spatial diversity reception assisted multiuser code-division multiple-access detector based on genetic algorithms (GAs) is proposed. Two different GA-based individual-selection strategies are considered. In our first approach, the so-called individuals of the GA are selected for further exploitation, based purely on the sum of their corresponding figures of merit evaluated for the individual antennas. According to our second strategy, the GA's individuals are selected based on the concept of the so-called Pareto optimality, which uses the information from the individual antennas independently. Computer simulations showed that the GAs employing the latter strategy achieve a lower bit-error rate as compared to the former strategy. For a 15-user GA-assisted system employing a spreading factor of 31, a complexity reduction factor of 81 was achieved at a performance identical to that of the optimum multiuser detector using a full search.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2003.809755