Abstract:

To improve cell-edge user (CEU) performance, a new soft fractional frequency reuse（SFFR） scheme is introduced. Unlike other frequency reuse schemes, it supports space diversity and space multiplexing because multi-cell and multi-CEU form a generalized multi-input multi-output (MIMO) system. On the other hand, CEU performance is improved by interference coordination through frequency programming based on soft fractional frequency reuse. It provides a good chance to use space multiplexing than space diversity. For getting a further performance, space multiplexing is adopted. In the meantime, cell-center users are still served by one cell. Simulation results show that the novel fractional frequency reuse scheme can support generalized MIMO technique and improve CEU performance significantly.

Key words: the 4th generation (4G) mobile communication systems, cell-edge user performance；soft fractional frequency reuse, generalized multi-input multi-output