Methods of Discrete-Time Phase and Frequency Synchronization

摘要

Further analysis of the reconstituted numerical FM with feedback (RNFMFB) has been performed, and these results are presented. It is shown that the RNFMFB demodulator is capable of achieving both phase and frequency synchronization in discrete-time applications. In contrast to the digital phase locked loop (DPLL), the RNFMFB is simple to use and can operate at low sampling rates. In addition to providing low SNR threshold enhancement, the RNFMFB demodulator also provides enhancement as the input SNR increases above threshold. This is again, in contrast to currently employed DPLL algorithms which can only provide threshold enhancement. Simulations and analyses are presented which verify this performance enhancement achieved by the RNFMFB demodulator.