Walsh code assignment and data structure for variable data rate communications
2005
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. An efficient data structure for maintaining variable-length Walsh codes is introduced. The benefits of code re-allocation are also studied. Performance is evaluated via simulation.
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