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    • 36. 发明申请
    • PHOTONIC FILTER BANK FOR HIGH-SPEED ANALOG-TO-DIGITAL CONVERSION
    • 用于高速模拟数字转换的光电滤波器
    • US20090251345A1
    • 2009-10-08
    • US12200219
    • 2008-08-28
    • Yue-Kai HuangTing WangPhilip Nan Ji
    • Yue-Kai HuangTing WangPhilip Nan Ji
    • H03M1/00
    • G02F7/00
    • An analog to digital converter (ADC) structure and method includes a photonic filter bank having at least two filters. The at least two filters are configured to create a corresponding spectral tributary from an input signal at a target rate, and the at least two filters are configured to exhibit orthogonality properties between respective tributaries. An optical/electrical (O/E) converter is coupled to each of the at least two filters in a respective spectral tributary to convert an optical input to an electrical output. An analog to digital converter (ADC) is coupled to each of the O/E converters in a respective spectral tributary to sample the electrical output at a fraction of a target rate and to convert a sampled analog electrical output into a digital signal. A synthesis filter is coupled to each of the ADCs in a respective spectral tributary to reconstruct the input signal digitally at the target rate.
    • 模数转换器(ADC)结构和方法包括具有至少两个滤波器的光子滤波器组。 所述至少两个滤波器被配置为以目标速率从输入信号创建相应的频谱支路,并且所述至少两个滤波器被配置为在各个支路之间呈现正交性质。 光/电(O / E)转换器耦合到相应频谱支路中的至少两个滤波器中的每一个,以将光输入转换成电输出。 模数转换器(ADC)被耦合到相应频谱支路中的每个O / E转换器,以目标速率的一小部分对电输出进行采样,并将采样的模拟电输出转换为数字信号。 合成滤波器耦合到相应频谱支路中的每个ADC,以目标速率数字地重构输入信号。
    • 37. 发明授权
    • Triplexer transceiver using parallel signal detection
    • 使用并行信号检测的三路收发器
    • US07529484B2
    • 2009-05-05
    • US11276486
    • 2006-03-02
    • Lei XuLei ZongPhilip Nan JiTing WangYuji Abe
    • Lei XuLei ZongPhilip Nan JiTing WangYuji Abe
    • H04J14/00H04J14/02
    • H04J14/0226H04B10/40H04J14/0232H04J14/0247H04J14/0252H04J14/0282H04J14/0298
    • An optical triplexer transceiver that utilizes parallel signal detection for use in broadband passive optical networks (B-PONs). The triplexer transceiver includes an optical filter comprising a first port coupled to a laser for receiving upstream optical data signals, a second port for passing the upstream optical data signals to a network, and for receiving combined downstream optical data and video signals from the network, the video signals modulated by subcarrier modulation (SCM), and a third port for communicating the combined downstream optical data and video signals to a photodetector constructed and arranged for simultaneously receiving the combined downstream optical data and video signals and converting the optical data and video signals to electrical signals. A plurality of filters are coupled to the photodetector for separating the combined downstream data and video signals, including a low-pass filter for passing the downstream data signals, and a band-pass filter for passing the video signals. The video signals are coherently detected in a number of stages corresponding to stages of SCM applied to the video signals. The triplexer transceiver is adapted to receive optical video signals that have been subjected first and second stages of SCM to move the spectra of the SCM video signals to a higher frequency range that does not overlap with a frequency range of the baseband data signals.
    • 一种使用并行信号检测用于宽带无源光网络(B-PON)的光学三重收发器。 三重收发器包括光滤波器,其包括耦合到激光器的第一端口用于接收上游光数据信号,用于将上游光数据信号传递到网络的第二端口,以及用于从网络接收组合的下行光数据和视频信号, 通过副载波调制(SCM)调制的视频信号和用于将组合的下行光数据和视频信号传送到光电探测器的第三端口,该光电探测器被构造和布置成同时接收组合的下行光数据和视频信号并转换光数据和视频信号 到电信号。 多个滤波器耦合到光电检测器,用于分离组合的下行数据和视频信号,包括用于通过下行数据信号的低通滤波器和用于传递视频信号的带通滤波器。 视频信号在对应于应用于视频信号的单片机的阶段的多个级中被相干检测。 三重收发器适于接收已经经历SCM的第一和第二级的光学视频信号,以将SCM视频信号的频谱移动到与基带数据信号的频率范围不重叠的较高频率范围。