Title :
Implementation of adaptive beamforming based on QR decomposition for CDMA
Author :
Liu, Zhaohui ; McCanny, J.V.
Author_Institution :
DSiP Labs., Queen´´s Univ., Belfast, UK
Abstract :
QR decomposition and inverse QR decomposition can be used for adaptive beamforming. These techniques can also be used in CDMA. Two different configurations based on chip interval and symbol interval are given and the computation throughput is compared. Some implementation details are also considered. It is shown that an RLS algorithm based on QR decomposition can be implemented by DSP for adaptive beamforming. If further performance is required, a dedicated beamforming ASIC/FPGA chip is needed.
Keywords :
application specific integrated circuits; array signal processing; code division multiple access; digital signal processing chips; field programmable gate arrays; least squares approximations; matrix decomposition; mobile radio; recursive estimation; CDMA; DSP; RLS algorithm; adaptive beamforming; chip interval; computation throughput; dedicated ASIC/FPGA chip; inverse QR decomposition; performance; symbol interval; Adaptive arrays; Array signal processing; Base stations; Convergence of numerical methods; Digital signal processing chips; Laboratories; Least squares approximation; Matrix decomposition; Multiaccess communication; Resonance light scattering;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1202440
