A smart multiple sector antennas control technique for a high-speed ATM wireless access system using 25-GHz band

This paper proposes a smart antenna control technique for an ATM wireless access system (AWA) that offers broadband mobile services. Although the quasi-millimeter band is a promising frequency band for the AWA system, which needs wide frequency spectrum, it suffers from heavy shadowing and multipath fading. The AWA system will employ sector-type B-CS/B-RM antennas to combat both problems. Space and site diversity using sector antennas at multiple sites can be achieved by smart antenna control. This technique is useful for reducing the deterioration caused by shadowing and multipath fading. This paper conducts experiments on a prototype AWA system to confirm that the proposed antenna control technique is realistic and effective.