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    • 4. 发明申请
    • SIMPLE, HIGH-SPEED OPTICAL SIGNAL PATTERN AND PROTOCOL DETECTION
    • 简单,高速光信号模式和协议检测
    • WO01063803A1
    • 2001-08-30
    • PCT/US2001/006019
    • 2001-02-22
    • H04B10/67H04B10/06
    • H04B10/676
    • A pattern and protocol detector (50) includes an optical-to-electrical ("OE") converter (56) that receives a modulated beam of light. The modulation imposed upon the beam of light includes repetitive patterns. The detector (50) also includes a delay means (66) that receives the electrical-signal produced by the OE converter (56), and produces a temporally delayed replica of the received electrical-signal. The temporal delay in the electrical-signal introduced by the delay means (66) is selected to effect a matching of a repetitive pattern present in the modulated beam of light. The detector (50) also includes a combining circuit (68), preferably an Exclusive-OR gate, that receives both the undelayed and delayed signals and combines them to produce a low-frequency signal. The low-frequency signal, representing matching and mismatching between individual bits in the two signals, permits a digital-logic circuit (72) to produces a signal that indicates occurrence of the repetitive patterns.
    • 模式和协议检测器(50)包括接收调制光束的光电(“OE”)转换器(56)。 施加在光束上的调制包括重复图案。 检测器(50)还包括延迟装置(66),其接收由OE转换器(56)产生的电信号,并且产生接收的电信号的时间上延迟的副本。 选择由延迟装置(66)引入的电信号中的时间延迟以实现调制光束中存在的重复图案的匹配。 检测器(50)还包括组合电路(68),优选地是异或门,其接收未延迟和延迟的信号,并组合它们以产生低频信号。 表示两个信号中的各个比特之间的匹配和不匹配的低频信号允许数字逻辑电路(72)产生指示重复模式的发生的信号。
    • 6. 发明申请
    • SKEW COMPENSATION ACROSS POLARIZED OPTICAL CHANNELS
    • 跨偏振光通道的偏移补偿
    • WO2009076316A2
    • 2009-06-18
    • PCT/US2008/085977
    • 2008-12-08
    • INFINERA CORPORATIONPERKINS, Drew
    • PERKINS, Drew
    • H04B10/18H04B10/158H04B10/155
    • H04B10/676H04B10/5053H04B10/5057H04B10/532H04B10/697
    • Embodiments of the present invention provide systems, devices and methods for managing skew within a polarized multi-channel optical transport system. In a DP-QPSK system, skew between polarized channels is compensated within the transport system by adding latency to at least one of the polarized channels. The amount of added latency may depend on various factors including the skew tolerance of the transport system and the amount of skew across the channels without compensation. This latency may be added optically or electrically, and at various locations on a channel signal path within a transport node, such as a terminal transmitter or receiver. Additionally, various embodiments of the invention provide for novel methods of inserting frame alignment bit sequences within the transport frame overhead so that alignment and skew compensation may be more efficiently and accurately performed at the transport receiver.
    • 本发明的实施例提供用于管理极化多通道光学传输系统内的偏斜的系统,设备和方法。 在DP-QPSK系统中,极化信道之间的偏差在传输系统内通过向至少一个极化信道添加延迟来补偿。 增加的延迟量可能取决于各种因素,包括运输系统的偏斜容差以及无需补偿的通道上的偏斜量。 该等待时间可以被光学地或电地添加,并且在传输节点(例如终端发射机或接收机)内的信道信号路径上的各个位置处添加。 此外,本发明的各种实施例提供了在传输帧开销内插入帧对准比特序列的新颖方法,以便可以在传输接收器处更高效和准确地执行对齐和偏斜补偿。
    • 7. 发明申请
    • OPTICAL MODULATION CONVERTER AND METHOD FOR CONVERTING THE MODULATION FORMAT OF AN OPTICAL SIGNAL
    • 光学调制转换器和转换光信号调制格式的方法
    • WO2005086390A1
    • 2005-09-15
    • PCT/EP2005/051028
    • 2005-03-08
    • MARCONI COMMUNICATIONS SPAD'ERRICO, AntonioCIARAMELLA, Ernesto
    • D'ERRICO, AntonioCIARAMELLA, Ernesto
    • H04B10/158
    • H04B10/69H04B10/676
    • An optical modulation converter (10) for converting the modulation format of an optical input signal is characterized by a birefringent medium (14), polarization maintaining fibre, with a selected differential group delay between its two main axes of symmetry through which the optical input signal is passed to be separated into two optical components each travelling along one of the main axes of the medium at a different group velocity to thereby convert the modulation format of the input signal. By appropriate selection of the differential group delay imparted by the medium relative to the bit rate of the input signal and by appropriately presenting the input signal relative to the main axes of the medium conversion between different modulation formats can be achieved. These include direct conversion from optical DPSK (Differential Phase Shift Keying) to POLSK (POLarization Shift Keying), DPSK to IM (Intensity-Modulated) through an intermediated conversion to POLSK, POLSK to IMDD (Intensity Modulation Direct Detection), and IM to POLSK.
    • 用于转换光输入信号的调制格式的光调制转换器(10)的特征在于双折射介质(14),保偏光纤,在其两个主对称轴之间具有选择的差分组延迟,光输入信号 通过以分离成两个光学部件,每个光学部件以不同的组速度沿着介质的主轴线行进,从而转换输入信号的调制格式。 可以通过适当地选择介质相对于输入信号的比特率而赋予的差分组延迟,并且可以通过适当地呈现相对于不同调制格式之间的介质转换的主轴的输入信号。 这些包括通过中间转换到POLSK,POLSK到IMDD(强度调制直接检测)和IM到POLSK的从光学DPSK(差分相移键控)到POLSK(偏振移位键控),DPSK到IM(强度调制)的直接转换 。
    • 8. 发明申请
    • VISIBLE LIGHT SIGNAL RECEIVING AND CONTROL METHOD, CONTROL APPARATUS, AND RECEIVING DEVICE
    • 可见光信号接收和控制方法,控制装置和接收装置
    • WO2016074548A1
    • 2016-05-19
    • PCT/CN2015/091616
    • 2015-10-10
    • BEIJING ZHIGU RUI TUO TECH CO., LTD
    • XU, RanDU, Lin
    • H04B10/60H04B10/116
    • H04B10/116H04B10/07953H04B10/676
    • Embodiments of the present application provide a visible light signal receiving and control method, a control apparatus, and a receiving device. The method comprises: determining a communication performance between a visible light signal receiving device and at least one visible light signal transmit device; and in response to an increase in the communication performance between the visible light signal receiving device and the at least one visible light signal transmit device, combining two first logic pixel units of an image sensor related to the at least one visible light signal transmit device as one second logic pixel unit to be read, when reading an inductive charge of the image sensor of the visible light signal receiving device. The method, apparatus, and device of the embodiments of the present application are capable of reducing power consumption of a visible light signal receiving device by changing the charge readout mode of an image sensor of the visible light signal receiving device in response to a change in the communication performance, and are more suitable for visible light communications in complicated mobile scenarios.
    • 本申请的实施例提供可见光信号接收和控制方法,控制装置和接收装置。 该方法包括:确定可见光信号接收装置与至少一个可见光信号发射装置之间的通信性能; 并且响应于可见光信号接收装置和至少一个可见光信号发送装置之间的通信性能的增加,将与至少一个可见光信号发送装置相关的图像传感器的两个第一逻辑像素单元组合为 当读取可见光信号接收装置的图像传感器的感应电荷时,要读取的一秒逻辑像素单元。 本申请的实施例的方法,装置和装置能够通过响应于可变光信号接收装置的变化而改变可见光信号接收装置的图像传感器的电荷读出模式来降低可见光信号接收装置的功耗 通信性能,更适合复杂移动场景中的可见光通信。