Title :
Adaptive digital beamforming in cellular CDMA systems using noniterative signal subspace tracking
Author :
Shiu, Wan Yi ; Blostein, Steven D.
Author_Institution :
Dept. of Electr. Eng., Queen´´s Univ., Kingston, Ont., Canada
Abstract :
We introduce a novel adaptive digital beamforming algorithm for application in cellular CDMA communications systems. A noniterative rank-one signal subspace eigenstructure update (NR1SSU) algorithm enables low-complexity recursive processing of beamforming weights. A PN chip-level IS-95 CDMA reference model has been used to test the beamforming algorithm via simulation. Our results show that accurate beamforming can be achieved to moving mobiles at one update per IS-95 frame of 192 data bits
Keywords :
adaptive antenna arrays; adaptive signal processing; array signal processing; cellular radio; code division multiple access; direction-of-arrival estimation; eigenvalues and eigenfunctions; land mobile radio; pseudonoise codes; radiofrequency interference; spread spectrum communication; tracking; CDMA; NR1SSU algorithm; PN chip-level IS-95 CDMA reference model; adaptive antenna array; adaptive digital beamforming algorithm; beamforming weights; cellular communications systems; low-complexity recursive processing; noniterative rank-one signal subspace eigenstructure update; noniterative signal subspace tracking; simulation; Adaptive arrays; Adaptive systems; Antenna arrays; Array signal processing; Computational modeling; Eigenvalues and eigenfunctions; Interference; Iterative methods; Multiaccess communication; Signal processing;
Conference_Titel :
Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3925-8
DOI :
10.1109/ICC.1997.609911
