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    • 1. 发明授权
    • Cable length estimation circuit using data signal edge rate detection
and analog to digital conversion
    • 电缆长度估算电路采用数据信号边沿速率检测和模数转换
    • US5818378A
    • 1998-10-06
    • US872272
    • 1997-06-10
    • Yi ChengZhenhua LiuThomas Jefferson Ronaldue
    • Yi ChengZhenhua LiuThomas Jefferson Ronaldue
    • H04B3/04G01B7/02H03M1/36H04B10/14H03M1/00
    • G01B7/02H03M1/367
    • A cable length estimation circuit for receiving an input MLT-3 signal provided through an arbitrary length cable and providing a control signal to an equalizer indicating the estimated length of the cable enabling the equalizer to compensate for distortion of the MLT-3 signal resulting from the cable. The cable length estimation circuit includes an edge rate detection circuit for measuring the rate of change in voltage with respect to time during transitions of the MLT-3 signal to provide an indication of cable length. The cable length estimation circuit can also include a digital averaging circuit which provides an average value for signals from the edge rate detection circuit for a desired number of transitions of the MLT-3 signal. The cable length estimation can also include a baseline wander detection circuit which functions so that previous cable length estimations are provided when baseline wander is detected.
    • 一种电缆长度估计电路,用于接收通过任意长度的电缆提供的输入MLT-3信号,并向均衡器提供指示电缆的估计长度的控制信号,使得均衡器能够补偿来自所述MLT-3信号的失真 电缆。 电缆长度估计电路包括边缘速率检测电路,用于在MLT-3信号转变期间测量相对于时间的电压变化率,以提供电缆长度的指示。 电缆长度估计电路还可以包括数字平均电路,其为来自边缘速率检测电路的信号提供用于MLT-3信号的期望数量的转换的平均值。 电缆长度估计还可以包括基线漂移检测电路,其功能是使得当检测到基线漂移时提供先前的电缆长度估计。
    • 2. 发明授权
    • Apparatus and method for decoding differential multi-level data with
adaptive threshold control
    • 用自适应阈值控制解码差分多级数据的装置和方法
    • US5969646A
    • 1999-10-19
    • US47439
    • 1998-03-25
    • Yi ChengZhenhua LiuKris Martin Holt
    • Yi ChengZhenhua LiuKris Martin Holt
    • H03K5/08H04L25/06H04L25/08H04L25/34H03M5/08
    • H04L25/08H03K5/082H04L25/061
    • An improved decoder for recovering Non-Return-to-Zero Interface (NRZI) digital data from a multiple layer transition (MLT-3) encoded signal in a 100BASE-TX Ethernet (IEEE Standard 802.3u) uses multiple comparators to minimize jitter in the decoded signal. A CMOS-based biasing circuit receives the differential MLT-3 encoded input signals and control signals from a signal amplitude detection circuit. The biasing circuit adjusts for any DC offset, and also generates offset signals based on respective mid-peak voltage values of the respective differential input signals. Four comparators are then used to detect a prescribed edge transition (e.g., a positive edge) coinciding with the respective mid-peak voltage value in the respective signals. The detected edge transitions are then used by edge decoding logic to generate the NRZI bilevel signal.
    • 用于从100BASE-TX以太网(IEEE标准802.3u)中的多层转换(MLT-3)编码信号中恢复非归零接口(NRZI)数字数据的改进解码器使用多个比较器来最小化 解码信号。 基于CMOS的偏置电路从信号幅度检测电路接收差分MLT-3编码的输入信号和控制信号。 偏置电路调整任何DC偏移,并且还基于各个差分输入信号的各个中间峰值电压值产生偏移信号。 然后使用四个比较器来检测与各个信号中的各个中间峰值电压值一致的规定边缘转变(例如,正边沿)。 所检测的边缘转换然后由边缘解码逻辑使用以产生NRZI双电平信号。
    • 3. 发明授权
    • Apparatus and method for a PHY transmitter with programmable power mode control in CMOS
    • 具有CMOS可编程功率模式控制的PHY发射机的装置和方法
    • US06377666B1
    • 2002-04-23
    • US09181557
    • 1998-10-29
    • Yi ChengZhenhua Liu
    • Yi ChengZhenhua Liu
    • H04M1100
    • H04L25/0286H03K19/018585H04L25/0282
    • A transmitter within a line driver circuit is configured to supply data pulses over existing residential wiring. The transmitter is implemented in a CMOS integrated circuit. The transmitter comprises three stages: a front-end digital/analog convertor (DAC), an intermediate DAC, and a current amplifier. The first stage dictates whether the output signal is in high power mode or low power mode. The intermediate DAC, as the second stage, controls the waveform shape and tunes the edge rate, thereby outputting a positive current signal and a negative current signal. The final stage amplifies these current signals to yield current signals having a desired waveform shape, power mode, and edge rate.
    • 线路驱动器电路内的发射器被配置为在现有住宅布线上提供数据脉冲。 发射机在CMOS集成电路中实现。 发射机包括三个阶段:前端数字/模拟转换器(DAC),中间DAC和电流放大器。 第一阶段指示输出信号是处于高功率模式还是低功耗模式。 作为第二级的中间DAC控制波形形状并调节边沿速率,由此输出正电流信号和负电流信号。 最终级放大这些电流信号以产生具有期望的波形形状,功率模式和边沿速率的电流信号。
    • 5. 发明授权
    • Method, device and system for establishing a bearer for a GSM network
    • 用于建立GSM网络承载的方法,设备和系统
    • US08401029B2
    • 2013-03-19
    • US12533583
    • 2009-07-31
    • Shaohua LuoZhenhua LiuHao Zhang
    • Shaohua LuoZhenhua LiuHao Zhang
    • H04L12/28
    • H04W88/16H04W8/26H04W76/10H04W88/181
    • A method for establishing a bearer for a GSM network is disclosed in embodiments of the present invention. The method includes: receiving, by a Media Gateway, a message for adding a wireless side end point, assigning an IP address and a port number for a call and transmitting a response message containing the IP address and the port number assigned for the call; acquiring, by the Media Gateway, the IP address and the port number assigned for the call by the Base Station Controller via the Mobile Switching Center Server and establishing an IP bearer with the Base Station Controller. A device and a system for establishing a bearer for a GSM network are also disclosed in embodiments of the present invention. With the present invention, a full or part path transcoder-free operation may be realized, which can avoid quality reduction and transmission delay.
    • 在本发明的实施例中公开了一种用于建立用于GSM网络的承载的方法。 该方法包括:由媒体网关接收用于添加无线侧端点的消息,为呼叫分配IP地址和端口号,并发送包含为呼叫分配的IP地址和端口号的响应消息; 由媒体网关获取由基站控制器经由移动交换中心服务器分配给该呼叫的IP地址和端口号,并与基站控制器建立IP承载。 在本发明的实施例中还公开了一种用于建立用于GSM网络的承载的设备和系统。 利用本发明,可以实现全或部分路径无代码转换器操作,这可以避免质量下降和传输延迟。
    • 9. 发明申请
    • METHOD, DEVICE AND SYSTEM FOR ESTABLISHING A BEARER FOR A GSM NETWORK
    • 用于建立GSM网络的承载体的方法,装置和系统
    • US20090290542A1
    • 2009-11-26
    • US12533583
    • 2009-07-31
    • Shaohua LuoZhenhua LiuHao Zhang
    • Shaohua LuoZhenhua LiuHao Zhang
    • H04W72/04
    • H04W88/16H04W8/26H04W76/10H04W88/181
    • A method for establishing a bearer for a GSM network is disclosed in embodiments of the present invention. The method includes: receiving, by a Media Gateway, a message for adding a wireless side end point, assigning an IP address and a port number for a call and transmitting a response message containing the IP address and the port number assigned for the call; acquiring, by the Media Gateway, the IP address and the port number assigned for the call by the Base Station Controller via the Mobile Switching Center Server and establishing an IP bearer with the Base Station Controller. A device and a system for establishing a bearer for a GSM network are also disclosed in embodiments of the present invention. With the present invention, a full or part path transcoder-free operation may be realized, which can avoid quality reduction and transmission delay.
    • 在本发明的实施例中公开了一种用于建立用于GSM网络的承载的方法。 该方法包括:由媒体网关接收用于添加无线侧端点的消息,为呼叫分配IP地址和端口号,并发送包含为呼叫分配的IP地址和端口号的响应消息; 由媒体网关获取由基站控制器经由移动交换中心服务器分配给该呼叫的IP地址和端口号,并与基站控制器建立IP承载。 在本发明的实施例中还公开了一种用于建立用于GSM网络的承载的设备和系统。 利用本发明,可以实现全或部分路径无代码转换器操作,这可以避免质量下降和传输延迟。