Title :
Space and time signal processing based on adaptive antenna array for CDMA
Author :
Kohno, Ryuji ; Yoshii, Isamu ; Watanabe, Kazunori
Author_Institution :
Div. of Electr. & Comput. Eng., Yokohama Nat. Univ., Japan
Abstract :
An adaptive antenna array or a smart antenna can form a desired antenna pattern and adaptively control it if an appropriate set of antenna weights is provided and updated in software. We have studied an adaptive array antenna considering as an adaptive filter in the space and time domains for radio communications, so that the communication theory can be generalized into both the space and time domains. This paper focuses on space and time signal processing for CDMA and introduces a series of our research results in this area, such as appropriate structures and updating algorithms of an adaptive array antenna for CDMA, space and time interference canceller and optimum multiuser receiver for CDMA, and joint optimization between transmitting and receiving array antennas etc. Such space and time signal processing promises significant improvement of performance in a CDMA mobile communication system and other spread spectrum systems such as a spread spectrum vehicular communication and ranging system
Keywords :
adaptive antenna arrays; adaptive filters; array signal processing; cochannel interference; code division multiple access; delay lines; direction-of-arrival estimation; interference suppression; land mobile radio; multiuser channels; radiofrequency interference; space-time adaptive processing; spread spectrum communication; CCI; CDMA; DOA; adaptive antenna array; adaptive control; adaptive filter; adaptive tapped delay line; antenna pattern; antenna weights; communication theory; joint optimization; mobile communication system; optimum multiuser receiver; radio communications; receiving array antenna; research results; smart antenna; software; space/time interference canceller; space/time signal processing; spread spectrum ranging system; spread spectrum vehicular communication; transmitting array antenna; updating algorithms; Adaptive arrays; Adaptive signal processing; Antenna arrays; Array signal processing; Mobile communication; Multiaccess communication; Receiving antennas; Signal processing algorithms; Spread spectrum communication; Transmitting antennas;
Conference_Titel :
Information Theory and Communications Workshop, 1999. Proceedings of the 1999 IEEE
Conference_Location :
Kruger National Park
Print_ISBN :
0-7803-5268-8
DOI :
10.1109/ITCOM.1999.781404
