A non-parametric test for detecting the complex-valued nature of time series
Temujin Gautama, Danilo P. Mandic, Marc M. Van Hulle · International Journal of Knowledge-based and Intelligent Engineering Systems · 2004
Although the emergence of multivariate signals in natural sciences and engineering has emphasised the problem of signal representation, that is, whether signals are by their nature a set of independent observations or multidimensional vectorial quant