Patent ID: 6587451
Filing Date: 2003-07-01
Classification: H04B

Abstract:
A method, for use in a smart antenna system, of generating a weight vector based on a maximum output power criteria without Lagrange multiplier wherein, the weight vector is applied after pseudo noise (PN) dispreading rather than in front of a receiver for channel estimation and data symbol demodulation, said method comprising the steps of:setting an initial weight vector w(0) and an initial eigenvalue &lgr;(0); receiving new post-PN processing data y(k); and updating the weight vector w(k) at a snapshot index k as: w_&af;(k)=â€ƒ&it;w_&af;(k-1)-12&it;1Î»&af;(k)&it;&Del;_&it;(k)=â€ƒ&it;w_&af;(k-1)+[y_&af;(k)-w_&af;(k-1)&it;â€ƒ&it;z&af;(k)]&it;â€ƒ&it;z*&af;(k)Î»&af;(k)w_&af;(k)=w_&af;(k)w1&af;(k)where âˆ‡(k) is a MÃ—1 gradient vector of a cost function, * is the conjugate operation, &lgr;(k) is the eigenvalue of an auto-covariance matrix Ryy(k), w1(k) is the first element of w(k), and z(k) is an array output expressed as: z(k)=wH(kâˆ’1)y(k), where H denotes a conjugate transpose.