Title :
A digital frequency synthesizer for a 2.4 GHz fast frequency hopping transceiver
Author :
Uusikartano, Riku ; Niittylahti, Jarkko
Author_Institution :
Digital & Comput. Syst. Lab., Tampere Univ. of Technol., Finland
Abstract :
In this paper, a compact architecture of a digital frequency synthesizer for a 2.4 GHz fast frequency hopping radio modem is presented. The synthesizer is designed for generating 12-bit quadrature carrier signals from 50 to 90 MHz in 500 kHz steps. The phase-to-amplitude conversion is performed with a look-up table which is compressed by using the fact that only a limited set of discrete frequencies is needed. Simulation and synthesis results for a VHDL-implementation of the architecture are given. In addition, the proposed architecture is compared to a traditional look-up based direct digital frequency synthesizer with similar performance
Keywords :
frequency hop communication; frequency synthesizers; modems; table lookup; transceivers; 12 bit; 2.4 GHz; 50 to 90 MHz; VHDL synthesis; digital frequency synthesizer; frequency hopping transceiver; look-up table; phase-to-amplitude conversion; quadrature carrier signal generation; radio modem; Clocks; Computer architecture; Digital filters; Frequency control; Frequency synthesizers; Modems; Signal generators; Spread spectrum communication; Table lookup; Transceivers;
Conference_Titel :
Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on
Conference_Location :
Lansing, MI
Print_ISBN :
0-7803-6475-9
DOI :
10.1109/MWSCAS.2000.951673
