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In this paper, we propose a dynamic reconfigurable architecture of a despreader for Multicarrier code division multiple access (CDMA) with two-dimensional spreading and variable spreading factor. The spreading factors in the time and frequency domains are varied according to cell configuration, channel load, and propagation channel conditions in the system. The structure of the proposed despreader is dynamically changed with spreading factors. Following this structure, optimum parallel and pipeline processing are achieved. The proposed despreader reduces the power consumption by 60% compared with the basic one.

Low Power Despreader using Dynamic Reconfigurable Architecture for Multicarrier CDMA with Two-Dimensional Spreading and Variable Spreading Factor