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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
Frequency tracking is a key issue in modern communications. In this paper, an indirect digital Phase-Locked frequency tracking loop is proposed by using phase-locked nested structure. Theory analysis and simulation results show that the design method proposed is able to achieve effectively frequency locking and tracking with better anti-noise performance and lower power dissipation.
Keywords:Phase-Locked Loop (PLL), Frequency tracking, Sample-and-hold, Power spectrum, Phase noise