A hybrid TDOA/AOA location algorithm and its performance analysis

In cellular mobile communication systems, due to the application of smart array antenna, it is possible for serving base station (BS) to deliver accurate angle of arrival (AOA) measurement of mobile station (MS) radio wave. In this paper, a time difference of arrival (TDOA) location algorithm in reference is extended to a TDOA/AOA hybrid location algorithm which can not only inherit the good performance of the original algorithm, but also improve the location accuracy by making full use of the AOA measurement. The new algorithm also has a closed form solution which has been derived in this paper. Simulation shows that, if a reasonable precision of the AOA measurement is achieved, much better location performance can be obtained, compared with the single TDOA location algorithm in reference .