Circuits, Systems, and Signal Processing

, Volume 35, Issue 5, pp 1783–1793 | Cite as

Sequency Domain Signal Processing Using Complex Hadamard Transform

  • D. JabeenEmail author
  • G. Monir
  • F. Azim
Short Paper


Signal processing can be performed in time domain as well as intransform domain. Frequency domain is perhaps the most widely used domain for transform domain signal processing. In this paper we analyze sequency domain (SD) signal processing as an alternate to the conventional frequency domain signal processing. We perform signal processing in sequency domain using conjugate-symmetric sequency-ordered complex Hadamard transform and compare the results with those of discrete Fourier transform. We observe that in comparison with frequency spectrum, spectral energy of sequency spectrum is spread over the entire spectrum. We performed signal and image denoising in SD and found that our designed SD filters effectively denoise the signals.


Complex Hadamard transform Discrete Fourier transform  Frequency Sequency Energy spectral density 


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Hamdard Institute of Engineering and TechnologyHamdard UniversityKarachiPakistan
  2. 2.Karachi Institute of Economics and TechnologyKarachiPakistan

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