Noncircularity of Demodulated Radar Signal
Rafał Piotr Rytel-Andrianik
AbstractThe output of the quadrature demodulator is generally regarded as a complex signal that is circular if only the demodulator is well balanced. In the paper we analyze properties of quadrature demodulators, particularly digital one, and show that the output is noncircular also if the input signal is nonstationary. Then we find sources of this noncircularity and show that they stem from transients of the low-pass demodulator filter. This is quite important because nonstationary inputs are quite typical in radar where power of echoes depends strongly on range. In the first sections we also review complex random signals and properties of circularity and properness.
|Journal series||International Journal of Electronics and Telecommunications, [do 2009: Electronics and Telecommunications Quarterly], ISSN 2081-8491, e-ISSN 2300-1933, [0867-6747]|
|Keywords in English||quadrature demodulator; complex radar signals; properness; circularity|
|Score|| = 9.0, 04-09-2019, ArticleFromJournal|
= 15.0, 04-09-2019, ArticleFromJournal
|Publication indicators||: 2013 = 0.457|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.