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    • 132. 发明授权
    • Jitter frequency shifting &Dgr;-&Sgr; modulated signal synchronization mapper
    • 抖动频移Delta-Sigma调制信号同步映射器
    • US06819725B1
    • 2004-11-16
    • US09641980
    • 2000-08-21
    • Gordon Robert OliverLarrie Carr
    • Gordon Robert OliverLarrie Carr
    • H04L700
    • H03L7/099H03L7/18H04J3/076
    • A signal synchronization mapper for mapping an input data stream characterized by a first frequency (typically a SONET/SDH stream) into an output data stream characterized by a second frequency. A phase lock control loop containing a “delta-sigma” (&Dgr;-&Sgr;) modulator which functions as a voltage controller oscillator synchronizes the data rate of the output stream to that of the input stream in a manner which simplifies attenuation of jitter energy when the output data stream is desynchronized (demapped). The modulator generates an accurate pulse train by duty-cycle dithered modulation of the input stream, which the mapper interprets as stuff/nullide-stuff commands such that the mapping operation is lossless over time (i.e. the number of bits in equals the number of bits out over time) thus allowing utilization of a FIFO buffer without the need to monitor the buffer's depth or its pointers.
    • 一种信号同步映射器,用于将以第一频率(通常为SONET / SDH流)为特征的输入数据流映射到以第二频率为特征的输出数据流中。 包含用作电压控制振荡器的“Δ-Σ”(Delta-Sigma)调制器的锁相控制回路以简化抖动能量衰减的方式将输出流的数据速率与输入流的数据速率同步,当Δ 输出数据流被去同步(去映射)。 调制器通过输入流的占空比抖动调制器产生精确的脉冲串,映射器将其解释为填充/零位填充命令,使得映射操作随时间变化无损(即位数等于位数 随着时间推移),从而允许使用FIFO缓冲器,而不需要监视缓冲区的深度或其指针。
    • 140. 发明申请
    • Stand Alone Aircraft Flight Data Transmitter
    • 独立飞机飞行数据发射机
    • US20130158751A1
    • 2013-06-20
    • US13327023
    • 2011-12-15
    • Bradley D. CornellGordon Robert Andrew SandellStephen Y. Lee
    • Bradley D. CornellGordon Robert Andrew SandellStephen Y. Lee
    • G01M17/00G06F19/00
    • G07C5/008B64D45/00B64D2045/0065G07C5/085H04B7/18506
    • A method and apparatus for transmitting data. An aircraft data transmission system comprises an aircraft flight data transmitter. The aircraft flight data transmitter is configured to be connected to a connector for an on-board flight data recorder system for an aircraft. The aircraft flight data transmitter is further configured to receive data generated by sensors in the aircraft from the on-board flight data recorder system. The aircraft flight data transmitter is further configured to determine whether an undesired condition is present in the aircraft using the data. The aircraft flight data transmitter is further configured to initiate sending of at least a portion of the data received from the on-board flight data recorder system over a wireless communications link in response to a determination that the undesired condition is present in the aircraft.
    • 一种用于传输数据的方法和装置。 飞机数据传输系统包括飞行器飞行数据发射机。 飞行器飞行数据发射器被配置为连接到用于飞机的机上飞行数据记录器系统的连接器。 飞行器飞行数据发射机还被配置为从机载飞行数据记录器系统接收飞行器中的传感器产生的数据。 飞行器飞行数据发射机还被配置为使用该数据来确定飞机中是否存在不期望的状况。 飞机飞行数据发射机还被配置为响应于确定飞行器中存在不需要的状况,发起通过无线通信链路发送从车载飞行数据记录器系统接收的数据的至少一部分。