PhD

Abstract: Smart antennas systems (SAS’s) have gained a lot of interest due to the explosive growth in demand for mobile communications in the last few years to overcome practical challenges in providing the service. The main benefit of the SAS technology lies in its ability to exploit the spatial domain, on top of the temporal and frequency domains, to improve the transceiver performance. Uniform Circular Arrays (UCA’s) are of interest because of their natural ability to provide a full azimuth (i.e.

Abstract: A major challenge in broadband MIMO-OFDM system is how to obtain the Channel State Information (CSI) accurately and promptly for coherent detection of information symbols and channel tracking. This thesis formulates the channel estimation problems for MIMO-OFDM systems and proposes a pilot-tone based estimation algorithms. The complex equivalent baseband MIMO-OFDM signal model is derived using matrix representation.

Abstract : One of the most popular techniques now a day for data spreading is Direct Sequence Spread spectrum (DSSS). The data that is to be wireless ransmitted is multiplied with a high frequency pseudo-random noise (PN) sequence at the transmitter. The work in this thesis presents the design, simulation, implementation and testing of a direct sequence spread spectrum receiver. The receiver employs a Binary-Phase-Shift Keying (BPSK) signaling scheme.