In multi-carrier systems

the most popular of the pilot-aided timing estimators is the one proposed by Schmidl and Cox(SC)

which only one training symbol is used for symbol timing recovery and carrier frequency acquisition.Generally

the proper action of the timing estimator may be strongly affected by the presence of disturbances

like narrowband interference(NBI)signals.This paper investigates the effect of NBI signals

on the timing synchronization for multi-carrier systems.The performance of the SC symbol timing synchronizer is evaluated in an analytical way in the presence of narrowband interferers.Also

the probabilities of both missing and false detection of a training sequence are addressed.