Pilot symbol allocation for limited feedback OFDM and MIMO-OFDM systems

Next generation wireless communication protocols must provide for higher bandwidths, more suitable quality of services and the ability to accommodate more users. Orthogonal frequency division multiplexing (OFDM), as a broadband modulation technique, is one of the prime candidates for simultaneously reaching these goals. Whether, however, we achieve these promises fully or at least partially in practice depends on a sensible design of transceiver signal processing algorithms. One such class of algorithms that is of considerable importance is the process of accurate channel estimation. Another class of techniques, that has only recently been the subject of intense research, is the use of channel state information and feedback to improve various performance measures of wireless links. The objective of this thesis is to find ways of combining these subjects in the hopes of optimizing channel estimation in OFDM systems with feedback.