Title :
A New Subspace Method for Direction of Arrival Estimation of Multipath Signals in DS- CDMA Systems
Author :
Beygi, Maryam Abolfath ; Olfat, Ali
Author_Institution :
Univ. of Tehran, Tehran
Abstract :
In this paper a new sub-space method for estimating the direction of arrival (DOA) of coherent signals at the base station of a direct-sequence code division multiple access (DS-CDMA) communication system is proposed. In this method, the signal subspace of the desired user is decomposed into proper smaller sub-spaces to resolve the spatial temporal signatures of the coherent received signals. The idea is based on exploiting the spreading code sequence of the user to derive a set of vectors constructing a subspace where a part of the desired spatial temporal signature lies. Using a step by step procedure, all DOAs of different paths of the desired user are obtained by the well-known MUSIC algorithm.
Keywords :
code division multiple access; direction-of-arrival estimation; signal classification; DOA estimation; DS-CDMA communication system; MUSIC algorithm; direct-sequence code division multiple access communication system; direction of arrival estimation; multipath signals; spatial temporal signature; spreading code sequence; subspace method; Direction of arrival estimation; Geometry; Land mobile radio; Mobile communication; Multiaccess communication; Multiple signal classification; Signal resolution; Signal to noise ratio; Smoothing methods; Spatial resolution;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2007. PIMRC 2007. IEEE 18th International Symposium on
Conference_Location :
Athens
Print_ISBN :
978-1-4244-1144-3
Electronic_ISBN :
978-1-4244-1144-3
DOI :
10.1109/PIMRC.2007.4394678
