Investigation on Interference Distribution in TDD-CDMA Systems
Wenbo Wang · Beijing Youdian Xueyuan xuebao · 2005
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.