Capacity enhancement based on using adaptive antenna arrays optimized for trunking efficiency

Cellular systems using adaptive antennas for spatial processing have been shown to provide an increase in capacity. When employing adaptive antennas, the standard approach to achieve capacity gain has been to maximize the link quality between the mobile and base station via optimum combining. This paper presents an alternative optimization approach based on optimizing the adaptive antenna array to maximize the trunking efficiency, of which the effect was subsequently an outstanding issue. Monte Carlo simulations, substantiated with theoretical analysis, were used to evaluate this issue. Based on the analysis, the proposed approach could increase the capacity by 2 to 4 times.