Capacity simulation of cdma2000 1×EV-DO forward link with opportunistic beam forming

This paper addresses possible capacity gains in a cdma2000 1×EV-DO system that utilizes the opportunistic beam forming (OBF) scheme. Contrary to the voice-oriented cdma2000 systems, where it is desirable to maintain a fixed signal-to-interference-and-noise ratio (SINK) level at the access terminal (AT), the 1×EV-DO system is designed to take advantage of the natural SINR fluctuations in a wireless channel. The resulting gain in capacity is called the "multiuser diversity gain". In certain channel conditions, the rate of the natural SINR fluctuations may not be high enough, resulting in low multiuser diversity gain. In such a case, SINR fluctuations may be induced artificially by the OBF scheme in order to increase capacity.