New digital signal processing algorithms for frequency deviation measurement

摘要

Two digital signal processing algorithms for frequency deviation measurement are introduced. The algorithms are derived using a new signal processing scheme based on quadratic forms of signal samples. These algorithms provide high measurement accuracy over a wide range of frequency changes. One is designed for measurements of small deviations of the nominal frequency, whereas the other one measures off-nominal frequency deviations. The performance of the algorithms is evaluated using computer simulation tests.