Time-Frequency Signal Processing for Wireless Communication

This chapter is intended to relate recent advances in the field of time–frequency signal processing (TFSP) to the need for further capacity of wireless communications systems. It first presents, in a brief and heuristic approach, the fundamentals of TFSP. It then describes the TFSP-based methodologies that are used in wireless communications with special emphasis on spread-spectrum techniques and time–frequency array processing. Topics discussed include channel modeling and identification, estimation of scattering function, interference mitigation, direction of arrival estimation, time–frequency MUSIC, and time–frequency source separation. Finally, other emerging applications of TFSP to wireless communications are discussed