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Discrete linear canonical transform computation by adaptive method.

Feng Zhang1, Ran Tao, Yue Wang

  • 1Department of Electronic Engineering, Beijing Institute of Technology, 5 Zhongguancun Street, Beijing, 100081, China. oUo@bit.edu.cn

Optics Express
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a new computation method for the discrete linear canonical transform (LCT) using the adaptive least-mean-square (LMS) algorithm. The derived block-based and stream-based approaches offer efficient VLSI implementation and error robustness.

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Area of Science:

  • Optics and Photonics
  • Signal Processing
  • Computer Engineering

Background:

  • The linear canonical transform (LCT) is a fundamental tool for analyzing quadratic phase systems in wavefield propagation.
  • Generalizing various optical transforms, the LCT plays a crucial role in diverse scientific and engineering fields.
  • Efficient computation of the discrete LCT (DLCT) is essential for practical applications.

Purpose of the Study:

  • To present a novel computation method for the discrete linear canonical transform (DLCT).
  • To utilize the adaptive least-mean-square (LMS) algorithm for efficient DLCT computation.
  • To explore and derive block-based and stream-based DLCT computation approaches.

Main Methods:

  • Derivation of block-based discrete LCT computation using the LMS algorithm.
  • Derivation of stream-based discrete LCT computation using the LMS algorithm.
  • Consideration of adaptive filter system structures for implementing these computational approaches.

Main Results:

  • The proposed methods provide efficient computational approaches for the DLCT.
  • Inherent parallel structures in the derived methods are suitable for VLSI implementation.
  • The LMS-based computation demonstrates robustness against error propagation during the process.

Conclusions:

  • The adaptive LMS algorithm offers an effective method for computing the discrete LCT.
  • The block-based and stream-based DLCT approaches are well-suited for high-performance hardware implementations.
  • The presented methods enhance the practicality and reliability of LCT computations in optical and signal processing applications.