This paper aims at solving the problem of tracking beam and main beam pointing error in multi-planar antenna SOTM caused by different frequency between communication and tracking signal,the fundamental of tracking beam pointing error is analyzed,and a scheme based on phase-compensation technology applying.

Robust adaptive beamforming against pointing error;

As the important source of pointing error,the geometric error of the mechanism is inevitable.

Aiming at the shortcoming that the adaptive beamforming algorithm is sensitive to the pointing error,the pa- per presents a robust adaptive algorithm which spread uniformly the angle obtained by the prior knowledge,then oh- rained a new average vector by accumulating the steering vector of all angles inside the spread range,and substitute it into the original beamforming algorithm.

In order to solve the problem of pointing deviation of phased arrays caused by the quantization phase of digital phase shifters, this paper proposed zero mean phase error method and investigated how the method affects the arrays beam-steering accuracy, and an effective formula was developed.

The condition of clock asynchronization that causes maximum effect on beam-steering is given,and a calculation formula of beam pattern is obtained.

This paper analyzes the effect of amplitude phase errors on sidelobe level and beam direction in digital beam forming system.