Title :
Adaptive feedback interference cancellation system (AF-ICS)
Author :
Kim, S.J. ; Lee, Jonathan Y. ; Lee, J.C. ; Kim, J.H. ; Lee, B. ; Kim, N.Y.
Author_Institution :
Kwangwoon Univ., Seoul, South Korea
Abstract :
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.
Keywords :
adaptive signal processing; code division multiple access; feedback; interference suppression; mobile radio; time-varying systems; 90 dB; AF-ICS; CDMA-3FA; adaptive feedback interference cancellation system; cancellation ratio; error ratio; feedback signal; maximum output power; performance index; time-varying feedback signal; total channel power; wireless communication system; Adaptive signal detection; Detectors; Feedback; Frequency; Interference cancellation; Power amplifiers; Repeaters; Signal detection; Signal generators; Time varying systems;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1211017
