Title :
Modulator design and architecture for multiple wireless applications
Author :
Wyskiel, David ; Feher, Kamilo
Author_Institution :
Digital Link Corp., Sunnyvale, CA, USA
Abstract :
A single circuit architecture to support BPSK, OQPSK, spectrally-efficient FQPSK and spectrally-efficient constant-envelope FQPSK-KF is described. Classical binary phase shift keying (BPSK) and offset quadrature phase shift keying (OQPSK), as well as spectrally-efficient FQPSK (filtered quadrature phase shift keying) constant envelope FQPSK-KF (filtered quadrature phase shift keying-Kato-Feher) are discussed. Waveshaping for increased spectral efficiency using ROM lookup table implementation is explored. A single circuit implementation is described to provide digital baseband modulation for all of the modulation formats discussed
Keywords :
mobile communication; phase shift keying; quadrature phase shift keying; table lookup; BPSK; OQPSK; ROM lookup table implementation; digital baseband modulation; filtered quadrature phase shift keying; filtered quadrature phase shift keying-Kato-Feher; modulation formats; multiple wireless applications; offset quadrature phase shift keying; spectral efficiency; spectrally-efficient FQPSK; spectrally-efficient constant-envelope FQPSK-KF; waveshaping; Bandwidth; Baseband; Binary phase shift keying; Circuits; Digital modulation; Fluctuations; Frequency; Phase modulation; Phase shift keying; Quadrature phase shift keying;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Conference_Location :
Sacramento, CA
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.662198
