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Opt Express. 2012 Nov 5;20(23):25636-43. doi: 10.1364/OE.20.025636.

Digital joint compensation of IMD3 and XMD in broadband channelized RF photonic link.

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  • 1State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), P.O. Box 55 (BUPT), Beijing 100876, China.


Based on forward distortion information acquisition and post digital signal processing (DSP), we propose and demonstrate a novel scheme to effectively suppress the third-order intermodulation distortion (IMD3) and cross-modulation distortion (XMD) in a channelized RF photonic link. The simultaneous distortion compensation capacity is studied numerically, and suppression of XMD and IMD3 by about 28 dB and 25 dB, respectively, is achieved experimentally. The scheme principle and the digital compensation procedure are discussed, which shows a simple hardware implementation and algorithm.

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