Abstract:

A tracking method based on simultaneous perturbation for single-port phasedarray antenna in satellite communication on-the-move system is proposed. Due to the difficulty of obtaining the gradient of the target function, the proposed method disturbs all the variables in the same way to estimate the gradient for the single-port receiver. After analyzing the impact of phase shifter located at different positions on the beam direction, an improved tracking method based on simultaneous perturbation is proposed to increase the speed of the tracking convergence. A new concept to carry out the accurate and fast satellite tracking for the vehicle-mounted phasedarray antenna is given. Compared with the existing methods, the proposed algorithm disturbs the set of phase shifters simultaneously rather than the beam pointing. In this case, the parameters changes of phase shifters and various system errors have little influence on the tracking convergence, which may enhance the stability of tracking and relax the hardware restrictions in the phased-array antenna design.