A novel dual antenna measurement of the angular distribution of received waves in the mobile radio environment as a function of position and delay time

A dual antenna experiment to estimate the angular distribution of received waves in a mobile radio environment as a function of position and delay time at 2.3 GHz using a Cox-type channel sounder is described. The two receive antennas had a transverse separation of 0.49 λ. The test area is a mix of modern high-rise buildings and warehouses lined by expanses of water. No line-of-sight path exists between transmitter (30-m elevation) and the mobile receiver (2.6-m elevation). As the receiver moves, a two-dimensional grid of I and Q -responses from each antenna is recorded. The data are correlated offline with a reference pseudo-random binary sequences and then processes to give estimated 360° plots of the incident power´s angular distribution at different delay times. This information is useful for the design of adaptive array antenna diversity systems