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Issue No. 08 - August (2009 vol. 58)
ISSN: 0018-9340
pp: 1026-1034
Noha Elarief , Oregon State University, Corvallis
Bella Bose , Oregon State University, Corvallis
In diversity combining automatic repeat request (ARQ), erroneous packets are combined together forming a single, more reliable, packet. In this paper, we give a diversity combining scheme for the m-ary unidirectional channel. A system using the given scheme with a t-unidirectional error detecting code is able to correct up to E_{max}=\lfloor {\frac{t}{2}}\rfloor unidirectional errors. Simulation results show that the underlined diversity combining protocol significantly increases the channel throughput over plain ARQ. To use the given scheme, the decoder should be able to decide the error type (increasing or decreasing). Hence, we give simple techniques to make this decision for various unidirectional error detecting codes.
Diversity combining, ARQ, unidirectional errors, error detection, error control.

B. Bose and N. Elarief, "Diversity Combining ARQ over the m(\geq 2)-ary Unidirectional Channel," in IEEE Transactions on Computers, vol. 58, no. , pp. 1026-1034, 2009.
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