Optimization of 24Â GHz-band impulse radio ultra-wideband optical signal generator

Based on the optical architecture that uses optical pulse shaping to generate 24 GHz-band arbitrary impulse radio ultra-wideband (IR-UWB) signals, an optimization method is proposed to increase the spectral efficiency of the generated signals. Simulated annealing algorithm is used as the optimization method and the spectrum efficiency is utilized as the optimization condition. Numerical analysis shows that power-efficient FCC-Compliant IR-UWB signals are achieved for the given structure. Moreover, the relationship between the spectrum efficiency and the length of pulse trains and the robustness of the optical pulse shaper are analyzed.