Title :
Performance analysis of adaptive beamforming for OFDM-CDMA systems in ground-based communications
Author :
Tsai, Jiann-An ; Hsiao, Chang-Lung ; Lee, Shih-Kai ; I, Chih-Lin ; Buehrer, R.Michael ; Woerner, Brian D.
Author_Institution :
CCL/ITRI, Taiwan
Abstract :
In this paper the use of adaptive antenna arrays for OFDM-CDMA system in ground-based communications is investigated. We present the performance of adaptive beamforming for OFDM-CDMA systems for both AWGN and Rayleigh fading channels. Three adaptive beamforming algorithms are considered: maximum SNR, minimum mean square error (MMSE), and maximum signal-to-interference-plus-noise ratio (MSINR). The effect of a finite number of samples for estimating the appropriate statistics for beamforming algorithms is examined. Finally, the impacts of different channel conditions such as angle spread and the user location on the performance of the adaptive beamforming is evaluated.
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; adaptive antenna arrays; array signal processing; code division multiple access; mean square error methods; mobile radio; AWGN channel; OFDM-CDMA systems; Rayleigh fading channel; adaptive antenna array; adaptive beamforming; additive white Gaussian noise channel; angle spread; code division multiple access; ground-based communications; maximum SNR; maximum signal-to-interference-plus-noise ratio; minimum mean square error; mobile radio communication; orthogonal frequency division multiplexing; signal to noise ratio; user location; AWGN; Adaptive arrays; Antenna arrays; Antennas and propagation; Array signal processing; Fading; Frequency diversity; Interference; Land mobile radio; Performance analysis;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1291990
