Implementation and field test result of a base station cancelling CDMA interference for the IMT-2000 air interface

Abstract

W e have developed the CIC-BS, in compliance with a tentative air interface designed for IMT-2000, and evaluated its performance both in the laboratory and in the field. In laboratory experiments using 5 MSs, where loading factor is set to around IO dB, transmission gain of 8 to 9.5 d B and receiving gain of 7 d B have been confirmed. In field experiments using 2 MSs, transmission gain of around 2.5 d B has been confirmed when the loading factor is an estimated 3 dB.

WCDMA Uplink Parallel Interference Cancellation—System Simulations and Prototype Field Trials

“…As an upper bound regarded as reference of the technology limit, the outage performance of an ideal interference canceller (ideal IC) is also shown in Figure 8b (rightmost curve). An ideal IC receiver removes perfectly all intracell interference, equivalent to a RIF equal to zero in the CIR model in (8). For the ideal IC, the capacity increase is hence approximately 180% in the multiple-cell network environment with realistic channel estimates.…”

“…Several studies have been published on suboptimal and less complex receivers, for example, a class of linear receivers [2], successive cancellation schemes [3], and particularly on parallel IC (PIC) schemes [4,5,6,7,8,9]. However, these studies are mainly focused on link performance or using an ideal analytical system approach.…”