关键词: 时分双工码分多址, 小区间干扰, 干扰消除

Abstract: A novel scheme to enable asynchronous time slots assignment is proposed for TDD-CDMA (time division duplex_code division multiple access) systems. Analysis of inherent inter-cell interference due to asynchrony between adjacent cellsis presented first, including BS-BS and MS-MSinterference. Then, wired connections between base stations are used to construct the adaptive RFinterferences canceller. MS-MS interference is suppressed by time slots allocation to MSs according to their locations. Both theoretical analysis and simulation results show that the inter-cell interference can be decreased to a negligible level and no longer a threat to the system performance. Therefore, the ability of dynamic resource allocation is improved for TDD-CDMA systems.

Key words: time division duplex-code division multiple access, inter-cell interference, interference cancellation