Title :
All-digital RF signal generation for software defined radio
Author :
Frappé, Antoine ; Flament, Axel ; Stefanelli, Bruno ; Cathelin, Andreia ; Kaiser, Andreas
Author_Institution :
Integrated Circuits Design Group, IEMN/ISEN, Lille
Abstract :
Digital generation of radio-frequency signals is a key concept of software defined radios. This paper presents a digital transmitter chain including a very high-speed delta-sigma modulator. It comprises also baseband processing, sample rate conversion, digital upconverter and output stages (switching- mode amplifier and BAW filters). About 74 dB of ACLR (adjacent channel leakage ratio) is obtained on the 7.8 GS/s output of the delta-sigma modulator for the WCDMA standard.
Keywords :
delta-sigma modulation; digital signals; signal generators; software radio; WCDMA; adjacent channel leakage ratio; all-digital RF signal generation; baseband processing; digital transmitter chain; digital upconverter; high-speed delta-sigma modulator; radio-frequency signals; sample rate conversion; software defined radio; Baseband; Delta modulation; Digital filters; Digital modulation; Multiaccess communication; Radio frequency; Radio transmitters; Radiofrequency amplifiers; Signal generators; Software radio;
Conference_Titel :
Circuits and Systems for Communications, 2008. ECCSC 2008. 4th European Conference on
Conference_Location :
Bucharest
Print_ISBN :
978-1-4244-2419-1
Electronic_ISBN :
978-1-4244-2420-7
DOI :
10.1109/ECCSC.2008.4611684
