A new interference canceller with digital transmission between base stations for distributed base station system

摘要

The distributed base station system allows us to improve the frequency utilization efficiency performance, since all the mobile terminals in the service area are operating at the same frequency at the same time. However, conventional distributed base station system requires radio-on-fiber(RoF) link in order to send analog RF(Radio Frequency) signal from base stations to control station. The RoF link could push up the system cost. In order to solve this problem, this paper proposes a new co-channel interference canceller, which only requires digital transmission between base stations. In the proposed canceller a base station sends the demodulated digital signal to the adjacent base stations to cancel the interference. Since the RoF link is not required, the proposed scheme can reduce the system cost. Computer simulation confirms that the proposed canceller is capable of canceling co-channel interference.