Title :
Linearized photonic if downconversion of analog microwave signals based on balanced detection and digital signal post-processing
Author :
Pengxiao Li ; Ran Shi ; Minghua Chen ; Hongwei Chen ; Sigang Yang ; Shizhong Xie
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A novel linearized photonic downconversion technique based on balanced detection and digital signal post-processing is proposed and experimentally demonstrated. The overall system performance benefits from carrier suppression operation and balanced detection. The dynamic ranges of both the X- and K-band links are also investigated. After compensated in the digital domain, the downconverted IMD3 components are significantly suppressed by more than 21 dB, corresponding to about 10 dB and 7.4 dB improvement in SFDR for the X- and K-band analog microwave photonic link, respectively.
Keywords :
band-pass filters; linearisation techniques; microwave photonics; optical filters; optical frequency conversion; optical signal detection; SFDR; analog microwave signals; balanced detection; carrier suppression; digital signal postprocessing; linearized photonic IF downconversion; microwave photonic link; spurious free dynamic range; Optical distortion; Optical fiber communication; Optical fibers; Optical filters; Optical modulation; Photonics; analog microwave signals; digital signal post-processing; linearization; microwave photonics; phase modulation; photonic downconversion;
Conference_Titel :
Microwave Photonics (MWP), 2012 International Topical Meeting on
Conference_Location :
Noordwijk
Print_ISBN :
978-1-4673-2863-0
DOI :
10.1109/MWP.2012.6474056
