Approach for fast time-frequency analysis

Chun Hing Cheng, Pyari Mohan Pradhan, Joseph Ross Mitchell

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


S-transform (ST) is a time-frequency representation (TFR) that is popularly used in a variety of applications, but prohibitive in both storage and computation for large time series. This study proposes a one-dimensional fast time-frequency transform (FTFT-1D) which generates a highly compressed form of the ST directly, without the need to compute the complete ST matrix initially and compress it subsequently. The compression technique used in the FTFT-1D helps in storage, transmission and visualisation of the ST. The FTFT-1D encodes the TFR information uniformly and finds the local spectrum instantaneously and accurately. It is useful for real-time applications such as monitoring, control and filtering. In addition, the FTFT-1D is memory efficient, robust and adaptive in nature.

Original languageEnglish (US)
Pages (from-to)360-372
Number of pages13
JournalIET Signal Processing
Issue number4
StatePublished - Jun 1 2014

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering


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