关键词: 移动通信, 干扰分析, 时分双工 -码分多址, 小区外干扰

Abstract:

In order to investigate the interference distribution in time division duplex code division multiple access (TDD CDMA) system, the difference of interference distribution between TDD CDMA and frequency division duplex (FDD) CDMA systems was investigated. By introducing smart antennas, the inter to intra cell interference ratio in CDMA systems was deduced. And taking TD SCDMA as an example, static and dynamic system level simulator was established to validate the conclusion of theoretical analysis. Simulation results show that sector antenna and smart antennas can reduce the inter to intra cell interference ratio effectively and slow dynamic channel allocation scheme is also able to weaken the inter cell interference in TDD CDMA systems.

Key words: mobile communication, interference analysis, time division duplex code division multi access, intra cell interference