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About DSP Based Carrier and Timing Recovery Techniques in Digital Modems

Next generation Digital and Software Defined Radio Receivers must perform the tasks of carrier and timing synchronization as well as the first generation tasks of spectral translation and filtering to select and reject specific spectral bands. Modern digital radios perform the synchronization tasks entirely in the sampled data domain. As we transition these tasks to the DSP domain, we are well advised to review the fundamental first principles of synchronization and pose the question “what is the best way to synthesize solutions based on first principles”? We do so to avoid advancing legacy compromises that reflect old technology limitations as well as to take advantage of innovative options offered by new DSP technology. This 2-day course presents the essential concepts of full DSP synchronization for timing recovery and for carrier recovery. The presentation emphasizes understanding of the processes and illustrates these processes with sample designs and implementations. Real time MATLAB simulations illustrate essential concepts

Course Topics

Receiver Structures: Parameters to be Estimated, Eye Diagrams, Constellations, and other Observables and Visualization Aides

Maximum Likelihood Estimation (MLE) of Phase: Phase Locked Loops and Digital Equivalents, Matched Filters;Decision and Non-Decision Directed, Squaring Loops

Maximum Likelihood Estimation of Timing: MLE Model and Approximations, Phase Detectors, Early-Late Gate; Decision and Non-Decision Directed

Maximum Likelihood Frequency Estimation: Frequency Matched Filter, Band Edge Filtering;

Polyphase Filters for timing recovery and band edge filtering.

Practical Consideration: Acquisition and Tracking Aides, Phase Detectors, Frequency Detectors; Direct Digital Synthesizers, CORDIC Algorithms

For further information please contact:
Anne-Marie Eliseo
Industry Education Manager
phone: +61-8-8302-3928
email: industryeducation@nicta.com.au