This letter presents a multi-UAV task assignment method based on a Modified Sparrow Search Algorithm (MSSA). Initially, the research develops a UAV task allocation model for rescue contexts, incorporating constraints related to time windows. Moreover, the algorithm's flexibility is bolstered by incorporating dynamic adaptive weights and adaptive step size factors during the discovery and follower position update phases of the sparrow search. To circumvent the issue of local optima, a Gaussian-Cauchy mutation strategy are employed for optimization. Experimental results indicate that, compared with other improved sparrow search algorithms, the task assignment cost of UAV based on MSSA is significantly reduced.
In a wireless optical communication system, since the attenuation of the response of the light source becomes higher as the frequency of the signal is higher, it is more difficult to modulate the high frequency signal.In order to compensate for the attenuation of the frequency response of the light source when transmitting high frequency signals, we design a nonlinear compensation method acting on the transmitter of the wireless optical communication system based on cascaded transistor amplifier circuit. In order to verify the role of the nonlinear compensation method, we selected the blue LED as the light source and built a wireless optical communication system. The experimental results show that the nonlinear compensation method extends the 3dB modulation bandwidth of the system from 12MHz to 235MHz.
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