Title :
Analysis of spectral spreading in a phase-modulated system for 1.75-GHz GSM RF transmitter design
Author :
Shin, Hyunchol ; Walker, Brett ; Pan, Dongling ; Dunworth, Jeremy ; Jaffee, James
Author_Institution :
QUALCOMM Inc., San Diego, CA, USA
Abstract :
An efficient and accurate analysis method to calculate the spectral spreading of a phase-modulated signal is presented. It accounts for two major non-idealities in a phase modulated system; (1) the phase error caused by circuit nonlinearity, (2) the additive spreading caused by LO spurious operation. The proposed method requires only a single-tone intermodulation simulation to fully characterize the spectral spreading in a phase-modulated system. Its accuracy is verified by comparing with the measurement results of a 1.75 GHz GSM RF transmitter.
Keywords :
cellular radio; circuit simulation; modulators; nonlinear distortion; phase modulation; radio transmitters; 1.75 GHz; GSM RF transmitter; LO spurious operation; RF phase modulator; additive spreading; circuit nonlinearity; intermodulation distortion; nonlinear distortion; phase error; phase-modulated system; single-tone intermodulation simulation; spectral spreading analysis; Circuit simulation; GSM; Phase distortion; Phase modulation; RF signals; Radio frequency; Radio transmitters; Signal analysis; Signal design; Spectral analysis;
Conference_Titel :
Custom Integrated Circuits Conference, 2003. Proceedings of the IEEE 2003
Print_ISBN :
0-7803-7842-3
DOI :
10.1109/CICC.2003.1249369
