Title :
Direct conversion receiver for 2- and 4-level FSK signals
Author :
Saitou, Masaya ; Kawabata, Mika ; Akaiwa, Yoshihiko
Author_Institution :
Dept. of Comput. Sci. & Electron., Kyushu Inst. of Technol., Fukuoka, Japan
Abstract :
Direct conversion (DC) receivers are suitable for integrated circuit implementation. In this report, DC receivers for 2- and 4-level FSK signals are proposed and its BER performance is investigated with computer simulation. For FSK signals, a difference of baseband signal level appears as a difference in a velocity of rotation on IQ-plane. In the proposed circuits, this difference in the velocity is detected with differential circuits and logic circuits such as flip-flop, counter and so on. Performance under frequency offset is also investigated and a compensation method for the frequency offset is proposed
Keywords :
compensation; counting circuits; differentiating circuits; flip-flops; frequency shift keying; integrated logic circuits; paging communication; radio receivers; signal detection; 2-level FSK signals; 4-level FSK signals; BER performance; DC receivers; IQ-plane; baseband signal level; compensation method; computer simulation; counter circuit; differential circuits; direct conversion receiver; flip-flop circuit; frequency offset; integrated circuit implementation; logic circuits; pagers; performance; rotation velocity; Baseband; Bit error rate; Computer science; Computer simulation; Detectors; Frequency shift keying; Logic circuits; Modulation; RF signals; Signal detection;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.496928
