# Hacking the Uncertainty Principle: Time Frequency

### Wavelet convolution is a powerful signal processing tool, used on Sigma-L to examine cycles in markets that are changing in power and frequency over time. We look at some of the key features

## Time Frequency Analysis and the FFT

Time frequency analysis and the fast Fourier transform (FFT) are two approaches used to analyse the frequency content of a signal. Financial markets can be thought of as noisy signals, a time series that is assumed to be composed of a number of periodic functions and random components. Time frequency analysis allows fo…