Nonlinear dynamics of a class of digital tan-lock loops with non-ideal phase detector

Sarkar, B. C.; Sarkar, Saumendra Sankar De; Banerjee, Tanmoy

doi:10.1016/j.sigpro.2014.04.008

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Cited by 4 publications

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“…The sampler type classifies DPLL into two major categories: uniform sampling DPLLs (US-DPLLs) and non-uniform sampling DPLLs (NUS-DPLLs). Different types of NUS-DPLLs have been introduced according to the way to detect the phase difference between locally generated carrier and the input signal to the loop from the sampled signal such as zero crossing DPLL (ZCDPLL) [3] [4] and digital tan-lock loop (DTLL) [5] [6] [7]. ZCDPLL is a closed loop system used to follow the zero crossing of the input carrier signal.…”

Section: Introductionmentioning

confidence: 99%

Fixed Point Iteration Chaos Controlled ZCDPLL

Nasir¹

2016

IJCNS

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The stable operation of first and second order Zero Crossing Digital Phase Locked Loop (ZCDPLL) is extended by using a Fixed Point Iteration (FPI) method with relaxation. The non-linear components of ZCDPLL such as sampler phase detector and Digital Controlled Oscillator (DCO) lead to unstable and chaotic operation when the filter gains are high. FPI will be used to stabilize the chaotic operation and consequently extend the lock range of the loop. The proposed stabilized loop can work in higher filter gains which are needed for faster signal acquisition.

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