Linearization of the first-order TDTL using a pre-distortion scheme

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Abstract

In this paper the architecture of a first-order time delay digital tanlock loop (TDTL) with linearized phase detector (PD) using a feedforward pre-distortion technique is proposed. The technique, which has been traditionally used with power amplifiers, involves pre-distorting the input signal to the TDTL so as to compensate for the nonlinearity of the TDTL caused by its fixed time delay unit. The performance of the proposed system was evaluated in noisy and noise-free environments and compared with the original TDTL system using sudden changes in input signal frequency using MATLAB/Simulink. In both cases, results indicate that the performance of the proposed TDTL with pre-distortion outperforms that of the original TDTL system.

Original languageBritish English
Title of host publicationSensor Signal Processing for Defence, SSPD 2012
Edition3
DOIs
StatePublished - 2012
EventSensor Signal Processing for Defence, SSPD 2012 - London, United Kingdom
Duration: 25 Sep 201227 Sep 2012

Publication series

NameIET Seminar Digest
Number3
Volume2012

Conference

ConferenceSensor Signal Processing for Defence, SSPD 2012
Country/TerritoryUnited Kingdom
CityLondon
Period25/09/1227/09/12

Keywords

  • Linearized phase detectors
  • Pre-distortion
  • TDTL

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