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

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2 Author(s)
Yen, K. ; Dept. of Electron. & Comput. Sci., Univ. of Southampton, Highfield Southampton, UK ; Hanzo, L.

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.

Published in:

Communications, IEEE Transactions on  (Volume:51 ,  Issue: 3 )

Date of Publication:

March 2003

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