Title :
Digitally supported feed-forward harmonic cancellation for filter-less ultra-wideband transmitters
Author :
Rawat, Meenakshi ; Roblin, Patrick ; Quindroit, Christophe ; Salam, Khan ; Cheggang Xie
Author_Institution :
Dept. of Electron. & Commun. Eng., Indian Inst. of Technol., Roorkee, Roorkee, India
Abstract :
The ultra-wideband (UWB) transmitters require bulky filter-banks to suppress harmonics at power amplifier (PA) output. This paper presents a digitally supported feed-forward (DSFF) harmonic cancellation scheme to allow re-configurability in terms of frequency and compact size. The proposed scheme is implemented in a low cost FPGA based measurement setup suitable for base-stations. As a case study, cancellation of second harmonic signal with 27 dBc adjacent channel power ratio is reported.
Keywords :
channel bank filters; feedforward; field programmable gate arrays; harmonics suppression; radio transmitters; radiofrequency power amplifiers; ultra wideband communication; wireless channels; DSFF harmonic cancellation; FPGA based measurement setup; PA; UWB transmitter; adjacent channel power ratio; base station; digitally supported feed-forward second order harmonic cancellation; filter bank; filterless ultra wideband transmitter; harmonics suppression; power amplifier; Harmonic analysis; Power amplifiers; Power harmonic filters; Radio frequency; Receivers; Transmitters; Ultra-wideband; harmonics; power amplifiers; signal processing; transmitters;
Conference_Titel :
Microwave and RF Conference (IMaRC), 2014 IEEE International
Conference_Location :
Bangalore
DOI :
10.1109/IMaRC.2014.7038976
