Abstract: A smart antenna, i.e., blind adaptive antenna array, is a method and system to suppress multiple access interference and to improve performance, for example in a code division multiple access (CDMA) wireless communications system, including third generation (3 g) cdma2000 and wide band (W)-CDMA. A convergence parameter is employed in a smart antenna processor. In general, a constant convergence parameter value is empirically determined and used after studying the convergence speed and the steady state mean square error (MSE) or other performance data, such as bit error rate. As the convergence parameter value increases, the convergence speed also increases but the MSE increases unfortunately, and vice versa. The traditional smart antenna with a constant convergence parameter would yield poor performance when the channel environment changes, which is true particularly when a mobile user moves around.

Abstract: There is disclosed a disposable and non-reusable syringe which has its piston locked in its forward dispense position after it is used, and the plunger is pulled out from the piston if the plunger is sought to be retracted from the syringe. The non-reusable syringe is so constructed to prevent the piston from reengaging with the plunger, even if the plunger is retracted and sought to be reinserted.