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 lambda . 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 degrees 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.<
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