A FUZZY EXPERT-SYSTEM MODEL FOR RF RECEIVER MODULE TESTING

An expert system for PCS-1900 radio frequency module test failure diag nostics that incorporates fuzzy logic has been implemented in the Wire less Networks manufacturing facility of Nortel in Research Triangle Pa rk, North Carolina. Since the relations between the results of paramet ric test measurement and failure modes are neither certain nor definit e, it is advantageous to employ fuzzy logic in building a knowledge ba se system. Instead of providing a definite conclusion that specifies a specific failure mode, this system gives a degree of failure for each mode, indicating the possibility of that mode being faulty.