METHOD FOR TIMING RECOVERY IN PRESENCE OF MULTIPATH DELAY AND COCHANNEL INTERFERENCE

Timing recovery schemes using sampling points one half-bit away from t he zero crossings of the eye pattern are severely degraded when delay spread is large or when cochannel interference is present. This work p resents a metric for QAM modulated signals (insensitive to carrier pha se errors) for estimating an optimum sampling instant when, under such severe conditions, midsymbol sampling is not satisfactory.