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Cognitive radio is a promising scheme of 5G to efficiently utilize the spectrum and greatly gain in capacity, and energy detection algorithm is widely adopted in spectrum sensing for the low complexity of the receiver structure and no need of primary signal information. Single user energy detection in cognitive radio system has been proved vulnerable to the noise uncertainty, and suffered from the...
Energy detection has a low complexity of receiver structure and requires no information about primary signal. However, a single user detection has been proved vulnerable to the noise uncertainty, which causes the existence of a SNR wall belowwhich the detector cannot robustly a chieve the given detection requirement. Compared to single user detection, cooperative energy spectrum sensing algorithms...
The cognitive radio technology is very helpful in improving the use of spectrum resources and reacting its operating environment. This paper presents a novel embedded framework for secondary user based a single FPGA in cognitive network. By analyzing the processing ability of FPGA and evaluating the existed architecture, this framework based FPGA supplying more logic resources and stronger embedded...
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