Abstract:

A practical omni-directional angle measurement algorithm based on phase mode excitation of the uniform circular array is proposed. The effect of mutual coupling between antennas to angle measurement could be neglected in this algorithm if the mutual coupling matrix is a symmetrical Toeplitz matrix and the omni-directional measurement can be implemented by solving the ambiguity. The quantitative relationships between the accuracy of the angle measurement and several kinds of factors such as the system error，the noise and the unbalance of the amplitude and phase among the channels are deduced so that there are some references for how to select the parameters of the array and how to restrict unfavorable factors according to the requirement of the accuracy of angle measurement. The simulation results demonstrate that the theoretical analysis is legitimate under the corresponding conditions.