1 February 2014 Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems
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Abstract
In this paper, we propose a simple and efficient predistortion method using schottky diodes to compensate the nonlinearity of RoF systems. L-I curve in LD is compared with I-V curve in schottky diode and the nonlinear characteristics are analyzed. The predistortion circuit has been designed with two paths. One path is the nonlinearity generation circuit with schottky diode, while the other path has only a time delay. Then, these two paths are recombined to suppress the IMD3 (3rd inter - modulation distortion) of LD. Experimental results show that the enhancements of about 26 dBc in the IMD3 and about 8.5 dB in the SFDR are achieved at 2.4 GHz.
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Byung-Hee Son, Byung-Hee Son, Kwang-Jin Kim, Kwang-Jin Kim, Ye Li, Ye Li, Young-Wan Choi, Young-Wan Choi, } "Opto-electrical predistortion method using nonlinearity of schottky diode for radio-over-fiber systems", Proc. SPIE 9007, Broadband Access Communication Technologies VIII, 90070C (1 February 2014); doi: 10.1117/12.2039310; https://doi.org/10.1117/12.2039310
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