Title :
Mean convergence rate of a decision directed adaptive beamformer with Gaussian interference
Author :
Biedka, Thomas E. ; Reed, Jeffrey H. ; Tranter, W.H.
Author_Institution :
Raytheon Syst Co., Greenville, TX, USA
Abstract :
New analytic results on the convergence of a blind decision directed adaptive algorithm in a beamforming application are presented. The data received at multiple antennas is assumed to consist of a desired PSK signal plus additive Gaussian noise and interference. The mean improvement in output SINR obtained with one iteration of the adaptive algorithm is predicted. This is used to estimate the number of iterations required for convergence. Results are presented for BPSK and QPSK signals. The performance of the decision directed algorithm and a constant modulus algorithm is also compared
Keywords :
Gaussian noise; array signal processing; cochannel interference; convergence of numerical methods; decision theory; direction-of-arrival estimation; least squares approximations; quadrature phase shift keying; BPSK signals; Gaussian interference; PSK signal; QPSK signals; adaptive algorithm; additive Gaussian noise; blind decision directed adaptive algorithm; cochannel interference; constant modulus algorithm; decision directed adaptive beamformer; least squares decision directed algorithm; mean convergence rate; multiple antennas; output SINR; performance; Adaptive algorithm; Additive noise; Algorithm design and analysis; Array signal processing; Convergence; Gaussian noise; Interference; Phase shift keying; Receiving antennas; Signal to noise ratio;
Conference_Titel :
Sensor Array and Multichannel Signal Processing Workshop. 2000. Proceedings of the 2000 IEEE
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-6339-6
DOI :
10.1109/SAM.2000.877970
