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Walsh code assignment and data structure for variable data rate communications

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4 Author(s)
Wang, M.M. ; Qualcomm Inc., San Diego ; Brown, T. ; Fleming, P. ; Hua Xu

In digital communication systems, variable-length Walsh codes, also called orthogonal variable spreading factor codes, are used to support simultaneous variable-rate data transmission. This paper describes algorithms for dynamic variable- length Walsh code assignment. Optimal assignment criterion is derived and an efficient data structure for maintaining variable- length Walsh codes is introduced. The benefits of code reallocation are also studied. Performance is evaluated via simulation.

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Communications, IEEE Transactions on  (Volume:56 ,  Issue: 3 )