Title :
A fully digital feedforward demodulator for vector signal analyzers
Author :
Chi, Chi-Mien ; Kao, Pin-Wen ; Liu, Woo-Yang
Author_Institution :
Center for Meas. Stand., Ind. Technol. Res. Inst., Hsinchu, Taiwan
Abstract :
This article describes an all-digital feedforward demodulator for use in implementing vector signal analyzers. An universal architecture is proposed for demodulating quadrature phase shift keying (QPSK) and Gaussian frequency shift keying (GFSK) modulated signals with a wide variety of symbol rates. The demodulator employs an open loop structure to achieve clock synchronization, frequency offset, and phase offset compensation.
Keywords :
demodulators; feedforward; frequency shift keying; quadrature phase shift keying; synchronisation; GFSK modulated signals; Gaussian frequency shift keying; QPSK; clock synchronization; digital feedforward demodulator; frequency offset; phase offset compensation; quadrature phase shift keying; symbol rates; universal architecture; vector signal analyzers; Bandwidth; Demodulation; Digital filters; Digital systems; Filtering; Finite impulse response filter; Frequency; IIR filters; Low pass filters; Signal analysis;
Conference_Titel :
Image and Signal Processing and Analysis, 2003. ISPA 2003. Proceedings of the 3rd International Symposium on
Print_ISBN :
953-184-061-X
DOI :
10.1109/ISPA.2003.1296379
