Adaptive feedback interference cancellation system (AF-ICS)

In this paper, the adaptive feedback interference cancellation system(AF-ICS) is suggested in order to cancel the feedback signal in the wireless communication system with the same frequency. AF-ICS prevents the oscillation of the receiver system and maintains the maximum output power of the power amplifier by the reduction of time-varying feedback signal. The cancellation ratio and the error ratio of the adaptive detector are achieved as simulation result of 40/spl sim/44 dB and the performance index (cancellation ratio and error ratio) of the adaptive detector is 13/spl sim/15 dB in the system implementation. AF-ICS improves total channel power about 4.11 dBm under CDMA-3FA and 90 dB feedback loss.