Design and Analysis of Optimum Space-Frequency-Time Codes for Multi-Rate OFDM Systems

In the past few years, the use of multiple transmitter and receiver antennas has emerged as one of the prime techniques to increase the capacity of wireless communications links. Information about the channel is not needed at the transmitter if a coding scheme, which exploits the space diversity (antennas) and the time diversity (symbol time), is used. Multicarrier technologies introduce another type of diversity to the system; frequency diversity. The major objective of this project is the development of theory that pertains to the design of optimal codes, which simultaneously exploit the space diversity, time diversity and frequency diversity.