Title :
Single-chip baseband waveform generator CMOS-LSI for quadrature-type GMSK modulator
Author :
Suzuki, Hajime ; Yamao, Yasushi ; Momma, K.
Author_Institution :
NTT Yokosuka Electrical Communication Laboratory, Yokosuka, Japan
Abstract :
A single-chip baseband waveform generator CMOS-LSI has been fabricated for use in the quadrature-type GMSK modulator, which is suitable for application to digital mobile communications. The LSI employs digital signal processing in realising such functions as Gaussian baseband filtering and phase integration. Digital/analogue convertors and auxiliary circuits, such as an internal-clock generator and carrier frequency adjuster, are also integrated onto the same chip. The LSI operates well below a bit rate of 110 Kbit/s when the power supply voltage is 5 V.
Keywords :
field effect integrated circuits; function generators; large scale integration; mobile radio systems; modulators; phase shift keying; radio links; CMOS LSI technology; Gaussian baseband filtering; Gaussian baseband minimum shift keying; carrier frequency adjuster; digital mobile communications; digital signal processing; internal-clock generator; mobile radio transmission; phase integration; quadrature-type GMSK modulator; radio links; single-chip baseband waveform generator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840594
