Title :
A Radiofrequency Demodulator with an Electrically Quadrature Phase Tuning for M-QAM Digital Radio Links
Author :
Le Polozec, X. ; Guillard, J.C. ; Fayol, D.
Author_Institution :
IEEE member, ALCATEL ATFH, 55 RUE GREFFULHE, 92301 LEVALLOIS PERRET, FRANCE
Abstract :
This paper describes the design of a M-QAM radio-frequency demodulator, where a phase shifter is placed in one of the two channels (I or Q) to minimize the quadrature phase error between them by means of an automatic control loop. Measurements results are shown for an implementation realized in the 6.4-7.1 GHz band for a 16 QAM 140 Mbits/s radio link.
Keywords :
Circuits; Demodulation; Digital communication; Digital modulation; Diversity reception; Error correction; Phase estimation; RF signals; Radio frequency; Radio link;
Conference_Titel :
Microwave Conference, 1990. 20th European
Conference_Location :
Budapest, Hungary
DOI :
10.1109/EUMA.1990.336077
