Digital Transition Tracking Symbol Synchronizer for LOW SNR Coded Systems

In coded telemetry systems symbol synchronization must be performed at low symbol signal-to-noise ratios (
ST/N_{0}
) with negligible degradation from the perfect synchronization case. A digital transition tracking synchronizer which operates with less than 0.03-dB degradation at
ST/N_{0} = -3
dB and at rates of 5.6 bit/s to 250 kbit/s is described.