Analysis of mutual interference in UMTS/IMT-2000 mixed-mode scenarios

Abstract

In this paper the results of a spectral compatibility investigation is presented. The mutual interference situations between the different UTRA-modes and between UTRA-FDD and PHS are described in detail for different scenarios. Some values for the ACIR (Adjacent Channel Interference Ratio) are obtained as a function of the power control gain. Finally, the results of system-level simulations using the monte-carlo technique are given.

Evaluation of Co-site Interference Between PCS1900 and UMTS in a Typical Outdoor Environment

“…The key point is mutual interference due to non-perfect orthogonality between these carrieres, caused both by sideband emissions and by receiver imperfections. [3] This paper utilizes PCS1900 and UMTS as the testing systems to evaluate and analyse the mutual interference. According to the spectrum allocation, PCS and 3G system spectrums overlap in the operating region of 19301980MHz and adjoin in 19801990 MHz.…”

“…This also can save considerable investment and reduce construction time for the new network. Current studies of the mutual interference of spread spectrum systems in [1][2] [3] are based on building an interference model and creating simulations to evaluate the effect of the distribution of, or the number of, sites and users. The radio propagation loss is also investigated in [4], and [5] and an automatic co-site interference evaluation system was developed.…”