The Tracking Performance of Sampled-Data Delay Lock Loops with Pulsed Envelope Input Signals.
OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB
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A sampled-data delay-lock loop for tracking the arrival time of a pulsed-envelope signal is modeled as a sampled-data control system. Models for two specific loop configurations are developed in detail. One, the analog loop, utilizes a RC filter and voltage controlled oscillator in the loop implementation while the other, the digital loop, uses a discrete filter and a gated fixed-frequency oscillator. These models are considered in a time division multiple access satellite communication application and the relation between system performance and loop parameters is derived in each case. System performance is measured by the rms timing jitter due to noise, the settling time to a step input of signal delay, and the steady-state tracking error to ramp inputs of signal delay. An example is presented to demonstrate how the derived relations can be used to specify loop parameters to yield a given desired performance. The relative merits of the two configurations are discussed. Author
- Electrical and Electronic Equipment