Estimation of directions of arrival of wideband and wideband spread sources

The demand of communicating at higher data rates can be easily met by using wideband signals [1], rendering the problem of estimating the direction of arrival (DOA) of wideband sources quite important. Multipaths, scatterers etc. present near the transmitter provide spatial bandwidth to these sources, which seriously degrade the performance of traditional DOA estimation techniques, designed assuming point sources. This paper, for the first time talks about the DOA estimation of the sources having both spatial and temporal bandwidth. The interesting aspect of the approach presented is the usage of ”spatial only” observations to estimate the DOA of both wideband sources and wideband spread sources.