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设计了一个简易的认知无线电频谱感知与决策引擎,主用户在发射信号前,首先采用功率谱感知算法检测其授权信道中各频段的状态,根据检测结果,结合自身通信传输效率与传输可靠性要求,采用基于BPSO算法的决策引擎给出合适的发射机发射功率及调制方式参数,配置发射机完成数据的可靠与有效传输。最后运用多载波系统对算法的性能进行了仿真,结果表明BPSO算法能在较短的时间内找到最优解,满足认知无线电实时性的要求。
A simple cognitive radio spectrum sensing and decision engine is designed. Before the signal is transmitted, the main user detects the status of each frequency band in its authorized channel by using the power spectrum sensing algorithm. Based on the detection results, combining the transmission efficiency and transmission reliability Requirements, using the BPSO algorithm-based decision engine gives the transmitter transmit power and modulation mode parameters, configure the transmitter to complete the data reliable and effective transmission. At last, the performance of the algorithm is simulated using multi-carrier system. The results show that the BPSO algorithm can find the optimal solution in a short time and meet the requirements of real-time cognitive radio.