高速滤波器组多载波PON的算法与硬件实现

高速无源光网络(PON)是推动我国宽带光接入及高速5G/后5G网络快速发展的关键技术，对促进社会经济发展及提升综合国力具有重要的战略意义。滤波器组多载波(FBMC)信号具有色散容忍度高、灵活性强、带外频谱泄露低及易与5G网络无缝融合的优点，在高速PON方面极具发展潜力。然而，在构建高速FBMC-PON时存在以下关键问题：（1）多载波信号的高峰均功率比极易诱发信号畸变；（2）低成本PON采用的低速光电器件极大限制了系统的容量；（3）高阶调制FBMC信号低噪声容忍度严重制约了系统的性能。为解决以上问题，本项目创新性地提出了灵活极化码、超奈奎斯特新型软解映射预编码、符号翻转概率整形等数字信号处理算法，并构建基于可编程逻辑门阵列硬件系统，实现高速FBMC-PON的核心算法。本课题有望在高速FBMC-PON的基础应用研究方面取得创新性成果，为未来大容量网络的发展提供重要理论依据和技术支撑。

High-speed passive optical network is a key technology to promote the development of broadband optical access network and 5G/post-5G network, which plays an important role in booming economic growth and improving the overall national strength. Filter band multicarrier (FBMC) signal has the advantages of strong dispersion tolerance, high flexibility, low out-of-band leakage and seamless convergence of optical and mobile networks for 5G, which is a promising candidate for high-speed PON. There are several challenges to realize a high-speed FBMC-PON. First, high peak-to-average power ratio of the multicarrier signal severely distorts the signal’s waveform. Second, low-speed optical and electrical components in cost-effective PON significantly limit the PON’s capacity. Third, high-order modulation FBMC signal is susceptible to noise and worsens the performance of PON. Therefore, the innovative digital signal processing algorithms of the flexible polar coding, the novel faster-than-Nyquist soft de-mapping precoding and symbol-swapping-based probabilistic shaping are proposed to solve the above issues. Meanwhile, the field-programmable gate array is designed to implement the key algorithms of high-speed FBMC-PON. The achieved progresses on the fundamental and application researches of high-speed FBMC-PON, will provide important theories and technologies to develop and apply the future large-capacity optical access network and high-speed 5G/post-5G network.