| Popis: |
Spectrum sensing performs major function in cognitive radio to efficiently use the underutilized spectrum. It has to detect the presence of primary user signal in a channel and has to utilize in primary user’s absence. In wideband spectrum sensing, a wide frequency has to be sensed. In this paper, a reconfigurable VLSI architecture is designed to perform cooperative spectrum sensing for wideband, this needs a local detection, which is fundamental for cooperative sensing. Each and every individual secondary user has to perform energy detection. In this paper, energy detection technique used is based on the Neyman Pearson criterion. Then the cooperative decision is taken which increases the sensing performance. The designed architecture is then implemented in Xilinx Virtex-4 Field programmable Gate array. |
