Fractional-bit differential detection of MSK - A new scheme for performance improvement in land mobile radio

A new scheme of fractional-bit differential detection of MSK is proposed. This technique is aimed at reducing timing fluctuation of eye patterns, which is found to be a cause of abnormally long burst errors in a frequency-selective fading channel. We have confirmed in a detailed laboratory experiment that such long burst errors can be eliminated by employing differential delay shorter than one-bit interval, thereby yielding remarkable improvement in the measured average bit error rates.