| This thesis covers the development of a 100 MHz bandwidth wireless channel sounder operating at 2.45 GHz. The spatial and temporal domains of the complex channel impulse response are found by switching between groups of antennas in a 13-element circular array to detect the multiple copies of the transmitted maximal length PN sequence. The well-known maximum likelihood estimation algorithm was adapted for use in finding the angle and time of arrival of each dominant multipath signal. The algorithm is based upon estimating the received signal using a series of calibration measurements. The calibration matrices, consisting of 60 single-signal arrival measurements equally spaced in the azimuth plane, form fundamental basis functions for the received data. The angles and times of arrival of multipath signals are determined by the set of time-delayed calibration matrices that most likely formed the received measurement. Simulations to determine the accuracy of the method were performed. Simple indoor and outdoor measurement data were collected to verify the performance of the sounder. |
