Title :
Adaptive beamforming of uniform circular arrays (UCA) for wireless CDMA system
Author :
Tsai, Jiann-An ; Woerner, Brian D.
Author_Institution :
Mobile & Portable Radio Res. Group, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
We evaluate the performance of adaptive beamforming using uniform circular antenna arrays for wireless CDMA systems. Two types of uniform circular array systems are considered: phased arrays and diversity arrays. For a phased array, the circle of radius of the uniform circular array (UCA) is less than one half wavelength; for a diversity array, the circle of radius is greater than one half wavelength. The adaptive beamforming performance is evaluated based on bit-error-rate (BER) simulation. The effects of angle spread and the distribution of user´s location are considered for both AWGN and Rayleigh fading channels.
Keywords :
AWGN channels; Rayleigh channels; antenna phased arrays; array signal processing; cellular radio; code division multiple access; diversity reception; error statistics; least mean squares methods; 3G systems; 4G systems; AWGN channels; BER; MMSE beamforming; Rayleigh fading channels; adaptive beamforming; angle spread; bit-error-rate; diversity arrays; phased arrays; uniform circular antenna arrays; wireless CDMA; AWGN; Adaptive arrays; Antenna arrays; Array signal processing; Bit error rate; Fading; Impedance; Multiaccess communication; Phased arrays; Wireless communication;
Conference_Titel :
Signals, Systems and Computers, 2001. Conference Record of the Thirty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-7147-X
DOI :
10.1109/ACSSC.2001.986958
