algorithm for fehlerschu00e4tzung faster carrier frequencies by means of synchronisierungssequenzen

摘要

Methods and apparatus for determining carrier frequency error of a serial offset quadrature pulse shaped signal, such as a minimum shift keyed (MSK) signal, are disclosed. Carrier frequency error is determined by receiving a quadrature pulse shaped signal having a synchronization sequence (400) , detecting synchronization of the quadrature pulse shaped signal (402) , and storing a baseband inphase (I) signal and a baseband quadrature (Q) signal of the synchronization sequence while detecting synchronization (404) . After detecting synchronization, overlapped segments of the stored baseband I and Q signals are read and correlated with the sychronization sequence stored locally (406) . Carrier frequency error is then estimated based on phase differences between each of the correlated segments (406) .