Hybrid ARQ Symbol Mapping in Digital Wireless Communication Systems Based on the Quadratic 3-dimensional Assignment Problem (Q3AP)
نویسندگان
چکیده
We report on the development of algorithms for solving the Quadratic 3-dimensional Assignment Problem (Q3AP). The application is a hybrid ARQ scheme for enriching diversity among multiple packet transmissions by optimizing the mapping of transmission symbols to data. Our current exact algorithm, based on a reformulation linearization technique, solves Q3AP instances of size 13 or smaller. Our four approximation techniques, which work well on large and difficult QAP instances, provide optimum or near optimum solutions for Q3AP instances of size 8, 9, 12, 15 and 16. The goal of future work is to extend the range of our techniques to symbol-data mapping problems as large as size 64 and 128.
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