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Using adaptive arrays for collision resolution in Slotted ALOHA packet radio systems

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2 Author(s)
Cavalcanti, Francisco R.P. ; Electrical Engineering Department, Federal University of Ceara, Brazil ; Romano, Joao M.T.

This paper discusses a general framework for evaluating the throughput performance of adaptive antenna arrays when the Slotted ALOHA protocol is employed as the random access mechanism for wireless packet transmission. A novel blind adaptive algorithm is presented and its performance is assessed by comparison with the minimum mean squared error (MMSE). Two propagation scenarios are considered: line of sight and Rayleigh fading. The results are obtained through a mix of analysis and simulation and it is shown that the proposed algorithm allows the antenna array to attain a high fraction of the optimal MMSE gains without resorting to training sequences.

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Communications and Networks, Journal of  (Volume:2 ,  Issue: 4 )