Complex correlation on linear array angle-ofarrival estimation measurement of ultra wideband propagation channels

The phase of complex correlation is exploited to provide estimation of the azimuth arrival angle of ultra wideband multipath signals. Regarding the cluster model for uniform linear arrays, spatial correlation between antenna elements plays an important role in the analytical stage. Performance of this estimation is validated by using frequency-domain channel measurements in an anechoic chamber. Five linear array elements are used at the receiver measuring in azimuth between 0 and 360°. Furthermore, six measurement scenario cases including line-of-sight and multipath reflection are created to represent simple indoor environments. In the computation process, the complex spatial correlation coefficients between each array and the reference array are computed at each temporal multipath bin. Associated with the phase difference method, angles-of-arrival of multipath components at each time bin can be obtained. Finally, in order to verify this proposed technique, comparisons with results obtained by the sensor CLEAN algorithm are also presented.