Title :
A spectral method of digital I Q conversion
Author :
Kongelbeck, Knut
Author_Institution :
Hughes Space & Commun. Co., Los Angeles, CA, USA
Abstract :
This paper develops a digital method of in phase (I) and quadrature (Q) conversion using techniques similar to those in the classical analog method. It uses a graphical method of representing the spectra of the processed signals that gives an intuitive feel for the process. It shows that while a sample rate of twice the bandwidth of the input signal is required, the computational complexity is reduced by a higher sample rate. The graphical technique gives insight into the filtering, IF frequency and sample rate requirements.
Keywords :
filtering theory; signal sampling; spectral analysis; IF frequency; analog I Q processing; computational complexity reduction; digital I Q conversion; filtering; graphical method; in phase conversion; input signal bandwidth; processed signals; quadrature conversion; sample rate; spectra representation; spectral method; Baseband; Digital signal processing; Distortion; Fourier transforms; Frequency conversion; Radar signal processing; Signal analysis; Signal processing; Signal sampling; Sonar;
Conference_Titel :
Signals, Systems & Computers, 1997. Conference Record of the Thirty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-8186-8316-3
DOI :
10.1109/ACSSC.1997.680562