关键词: 无线通信, 多天线蜂窝系统, 多小区协作, 机会调度, 极值理论, 多用户分集

Abstract:

Cooperative scheduling between base stations is proposed to reduce intercell interference in multiple antenna cellular communication systems. Based on interferencelimited twocell model, cooperative opportunistic scheduler is proposed and analyzed. The interference signal power is proven to be exponentially distributed. The concise expression of the approximated average rate and the multiuser diversity gain are derived by utilizing extreme value theory. Furthermore, the impact of several factors on the cooperative opportunistic scheduling in practical cellular systems is discussed. The multiuser diversity gain of noncooperative opportunistic scheduling is shown as withusers per cell, whereas that achieved by the proposed cooperative opportunistic scheduler is. Simulation shows that the proposed cooperative opportunistic scheduler can effectively reduce intercell interference and achieve significant gain.

Key words: wireless communication, multiple antenna cellular systems, multicell cooperation, opportunistic scheduling, extreme value theory, multiuser diversity gain