认知无线电是一种通过与其运行环境交互而改变其发射参数提高频谱利用率的新的智能技术。-Cognitive radio is viewed as a novel approach that can change its transmitter parameters based on interaction with the environment where it operates and can alSO improve its spectrum access and efficiency．

认知无线电频谱检测技术的研究,有循环检测，周期性检测，仿真程序和结果。很全面-Implement a coherently detected BPSK system on MATLAB and obtain its PB vs E/N0 characteristic experimentally. Compare it with a graph of the Q(sqrt(2E/N0)) function.