Title :
Simulated tolerance of loop parameters of Cartesian feedback amplifier for π/4-shifted QPSK transmitter
Author :
Kubo, T. ; Ohishi, Y. ; Fukuda, E. ; Daido, Y.
Author_Institution :
Fujitsu Laboratories Ltd., Radio & Satellite Commun. Syst. Lab., Kawasaki, Japan
fDate :
29 Sep-1 Oct 1992
Abstract :
Evaluates Cartesian feedback amplifier performance for a mobile terminal for a digital cellular system using π/4-shifted QPSK. To determine the out-of-band emission, the authors calculated spectra in peak-hold mode based on RCR Standard STD-27 on Japan Digital Cellular Telecommunication System. They calculated the tolerance of the feedback amplifier´s loop parameters, assuming TDMA system parameters based on the RCR specifications. Since the specifications for out-of-band emission of -45 dB at 50 kHz and -60 dB at 100 kHz from the band center were satisfied, the Cartesian feedback amplifier is applicable to a TDMA transmitter and is easily implemented for practical applications
Keywords :
cellular radio; digital radio systems; feedback; phase shift keying; radio transmitters; radiofrequency amplifiers; π/4-shifted QPSK transmitter; 100 kHz; 50 kHz; Cartesian feedback amplifier; Japan Digital Cellular Telecommunication System; LF; RCR Standard STD-27; TDMA transmitter; digital cellular system; loop parameters; mobile terminal; out-of-band emission; simulated tolerance; Energy consumption; Feedback amplifiers; Feedback loop; Interchannel interference; Laboratories; Nonlinear distortion; Quadrature phase shift keying; Radio transmitters; Telecommunication standards; Time division multiple access;
Conference_Titel :
Universal Personal Communications, 1992. ICUPC '92 Proceedings., 1st International Conference on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-0591-4
DOI :
10.1109/ICUPC.1992.240786
