Title :
Antenna arrays for CDMA systems with multipath
Author :
Khalaj, Babak H. ; Paulraj, Arogyaswami ; Kailath, Thomas
Author_Institution :
Inf. Syst. Lab., Stanford Univ., CA, USA
Abstract :
A major advantage of spread-spectrum communication systems is their ability to exploit the multipath structure of the received signal. Different paths can be characterized by their time delays, attenuations, and angles of arrival. A standard RAKE receiver estimates the path delays and attenuations and coherently combines different path signals to mitigate the effects of multipath. A method of exploiting the spatial properties of the multipath environment using multiple element antenna arrays is proposed. Both array vectors and time structure of the multipath channel are estimated using the special code structure of CDMA systems
Keywords :
antenna arrays; code division multiple access; direction-of-arrival estimation; military communication; multipath channels; receiving antennas; spread spectrum communication; CDMA systems; array vectors; channel estimation algorithm; multipath channel; multiple element antenna arrays; spatial properties; spread-spectrum communication systems; time structure; Antenna arrays; Attenuation; Bandwidth; Delay effects; Delay estimation; Fading; Multiaccess communication; Multipath channels; RAKE receivers; Spread spectrum communication;
Conference_Titel :
Military Communications Conference, 1993. MILCOM '93. Conference record. Communications on the Move., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0953-7
DOI :
10.1109/MILCOM.1993.408593
