Array channel identification using direction of arrival parametrization

In mobile radio communication, the use of an antenna array can improve the performance of the reception. By using an antenna array it becomes possible to form beams towards the desired signals while “nulling out” interfering signals. Identification of a radio channel to an antenna array, using a parametrization in direction of arrival and gains of signal paths, has been investigated. This channel estimate is compared to a least squares FIR channel identification. For the scenarios studied, the parametrized method had better performance than the least squares method. Especially, the parametrized method has an improved performance in the presence of strong co-channel interferers. The parametrized method is however more complex and relies on estimates of the number of signals arriving to the antenna array