宽带多载波微波光链路多源非线性数字补偿方法

随着数据通信容量需求的不断增长,微波光子技术在未来宽带卫星通信发展中具有良好的应用潜力。针对宽带多载波微波光链路系统中多种非线性失真共存问题,提出了一种数字线性化方法,通过在数字域进行非线性失真算法补偿,实现了系统多载波射频信号的互调非线性失真、三阶交调非线性失真的共同抑制。实验证明了所提方法的有效性。

A multi-source nonlinear digital compensation method for broadband multi-carrier microwave photonic link

With the continuously increasing demand for data communication capacity,microwave photonics technology has promising application potential in the future development of broadband satellite communication.To suppress the multiple nonlinearities of the broadband multi-carrier microwave photonic link,an effective digital linearization method is proposed.In the scheme,the nonlinear compensation is carried out in the digital domain,then the suppression of the nonlinearities of the broadband multi-carrier microwave photonic system is realized successfully,including the third-order intermodulation distortions and the cross modulation distortions.The experiment shows that the proposed method is effective.