• Pasula vasudeva reddy
• Kethavath Pooja Naik

Time-frequency analysis has been intensively investigated and developed within the last 20 years. In signal process, time–frequency analysis includes those techniques that study a signal in both the time and frequency domains at the same time, mistreatment numerous time–frequency representations.The practical motivation for time–frequency analysis is that classical harmonic analysis assumes that signals square measure infinite in time or periodic, whereas several signals in follow square measure of short length, and alter considerably over their length. As an example, ancient musical instruments don't manufacture infinite length sinusoids, however instead begin with associate degree attack, then step by step decay. this is often poorly drawn by ancient ways, that motivates time–frequency analysis.A time–frequency illustration (TFR) is usually complex-valued fields over time and frequency, wherever the modulus of the spectrum represents either amplitude or "energy density" (the concentration of the foundation mean sq. over time and frequency).

Signal processing, Time frequency analysis, Time frequency representation, Modulus

"A STUDY ON TIME FREQUENCY ANALYSIS AND ITS REPRESENTATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 3, page no.560-563, March-2021, Available :http://www.jetir.org/papers/JETIR2103077.pdf

"A STUDY ON TIME FREQUENCY ANALYSIS AND ITS REPRESENTATION", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 3, page no. pp560-563, March-2021, Available at : http://www.jetir.org/papers/JETIR2103077.pdf