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1. 发明授权

US5479440A Apparatus and method for impulsive noise cancellation 失效
标题翻译：脉冲噪声消除装置及方法
公开(公告)号：US5479440A
公开(公告)日：1995-12-26
申请号：US228153
申请日：1994-04-15
申请人： Farhad Esfahani
发明人： Farhad Esfahani
IPC分类号： G06F17/00 , H03H21/00 , H04L25/30 , H03D1/04 , G06F17/14
CPC分类号： H03H21/0012
摘要： The present invention comprises an apparatus and method for substantially canceling impulsive noise from data. Such substantial cancellation is achieved by converting the time-domain data into its corresponding frequency spectrum, such that the impulsive noise threshold can be determined. Once such threshold is determined, all frequency components less than this threshold are canceled with the resulting spectrum being converted back to the time-domain. This substantially impulse free signal can then be substituted into the original signal where the impulsive noise occurs, thus, resulting in a signal having minimally distorted data that is substantially devoid of any impulsive noise. This signal may be further processed by an adaptive filter stage to substantially remove any remaining noise from the signal.
摘要翻译：本发明包括用于从数据基本上消除脉冲噪声的装置和方法。通过将时域数据转换成其对应的频谱，可以确定脉冲噪声阈值来实现这种实质的消除。一旦确定了这样的阈值，则所有频率分量小于该阈值被消除，所得到的频谱被转换回到时域。然后可以将这个基本上无脉冲的信号代入到产生脉冲噪声的原始信号中，从而导致具有基本上没有任何脉冲噪声的最小失真数据的信号。该信号可以由自适应滤波器级进一步处理，以从信号中基本上去除任何剩余的噪声。

2. 发明授权

US06195415B1 Communication line test apparatus for a mobile radio system 失效
标题翻译：用于移动无线电系统的通信线路测试装置
公开(公告)号：US06195415B1
公开(公告)日：2001-02-27
申请号：US09123214
申请日：1998-07-27
申请人： Makoto Shimoda , Farhad Esfahani
发明人： Makoto Shimoda , Farhad Esfahani
IPC分类号： H04M124
CPC分类号： H04W24/00 , H04M3/323 , H04M2207/18 , H04Q1/45
摘要： A mobile radio communication network including plural radio cells controlled by a centralized hub controller. The hub controller communicates data packets to each radio cell on a data line, and bridges together appropriate audio lines to provide dispatch communications between the radio cells. The hub controller is programmed to carry out tests on each data line and each audio line to verify off-hook conditions thereof so that uninterrupted data signals and audio signals can be carried.
摘要翻译：一种移动无线电通信网络，包括由集中式集线器控制器控制的多个无线电小区。集线器控制器将数据分组传送到数据线上的每个无线电小区，并将适当的音频线桥接在一起以提供无线电小区之间的调度通信。集线器控制器被编程为对每条数据线和每条音频线进行测试，以验证其摘机状态，从而可以承载不间断的数据信号和音频信号。

3. 发明授权

US5784004A Apparatuses and systems for reducing power consumption in remote sensing applications 失效
标题翻译：用于降低遥感应用中功耗的设备和系统
公开(公告)号：US5784004A
公开(公告)日：1998-07-21
申请号：US492814
申请日：1995-06-20
申请人： Farhad Esfahani , James Lloyd Davis , Robert L. Toellner
发明人： Farhad Esfahani , James Lloyd Davis , Robert L. Toellner
IPC分类号： E21B47/06 , E21B47/12 , G01V3/34 , G01V3/00
CPC分类号： E21B47/122 , E21B47/06 , E21B47/065 , G01V3/34
摘要： The system of the subject invention includes an antenna system, a surface apparatus and a battery-powered remote apparatus useful for applications such as well bore telemetry. In well bore telemetry, the surface apparatus is located uphole on the earth's surface and the remote apparatus is positioned at a remote location downhole in a well bore. The remote apparatus includes a sensor/transmitter unit for sensing physical characteristics such as pressure and/or temperature. The remote apparatus conserves power stored in its battery by transmitting change-in-pressure and/or change-in-temperature data that requires less power for transmission than absolute pressure and/or temperature data. The remote apparatus also conserves power by transmitting absolute pressure data in a single data frame and transmitting absolute temperature data in portions in a series of data frames. The remote apparatus can transition between initial time delay, fixed transmit sequence, sleep, operation, and test states based on its control program and/or based upon the transmission of control data from the surface apparatus. The surface apparatus receives a main signal from the remote apparatus and a reference signal from the antenna system and uses the reference signal to remove noise components from the main signal.
摘要翻译：本发明的系统包括天线系统，表面装置和用于诸如井眼遥测的应用的电池供电的远程装置。在井筒遥测中，地面装置位于地球表面的井上，远程装置位于井下井下的远处。远程装置包括用于感测诸如压力和/或温度的物理特性的传感器/发射器单元。远程设备通过传输压力和/或温度变化数据来节省存储在其电池中的功率，该数据与绝对压力和/或温度数据相比需要更少的传输功率。远程设备还通过在单个数据帧中传送绝对压力数据并在一系列数据帧中部分传送绝对温度数据来节省功率。远程设备可以基于其控制程序和/或基于来自表面设备的控制数据的传输，在初始时间延迟，固定发送顺序，睡眠，操作和测试状态之间转换。表面装置从远程装置接收主信号和来自天线系统的参考信号，并使用参考信号从主信号中去除噪声分量。

4. 发明授权

US5689248A Methods for reducing power consumption in remote sensing applications 失效
标题翻译：降低遥感应用功耗的方法
公开(公告)号：US5689248A
公开(公告)日：1997-11-18
申请号：US358069
申请日：1994-12-15
申请人： Farhad Esfahani , James Lloyd Davis
发明人： Farhad Esfahani , James Lloyd Davis
IPC分类号： E21B47/12 , G01V3/34 , G01V3/00
CPC分类号： E21B47/12 , G01V3/34
摘要： The methods of this invention reduce the amount of power consumed by a remotely positioned (i.e. downhole) sensor/transmitter used in applications such as well bore telemetry. The method involves the sensing of physical characteristics such as pressure and/or temperature to generate a first absolute value than is transmitted to a surface receiver located at the earth's surface. At a later time (or period) the physical characteristic is again sensed to generate a second absolute value that is subtracted from the first absolute value to generate a difference. If the difference is significant (i.e., greater than a predetermined value), the difference will be transmitted to the surface receiver. Because the difference will generally have fewer bits of data than the absolute data, less data can be transmitted so that battery power is conserved in the remote sensor/transmitter. In the event that the difference is not significant, even fewer bits need to be transmitted by the remote sensor/transmitter. Another method uses the fact that temperature is a more slowly changing phenomenon than pressure, and transmits data in frame formats constructed so that the transmission bit rate of sensed pressure data is higher than the transmission rate of sensed temperature data. In another method of this invention, the remote sensor/transmitter is programmed into a sleep state in which the remote sensor/transmitter consumes no appreciable battery power, for example, while being run down a well bore. The remote sensor/transmitter then transitions from the sleep state to the operation state after the expiration of a predetermined time period or by transmission of a control signal thereto.
摘要翻译：本发明的方法减少了在诸如井眼遥测的应用中使用的远程定位（即井下）传感器/发射器消耗的功率量。该方法包括感测诸如压力和/或温度的物理特性，以产生比传送到位于地球表面的表面接收器的第一绝对值。在稍后的时间（或周期），再次感测物理特性以产生从第一绝对值减去的第二绝对值以产生差。如果该差异是显着的（即，大于预定值），则该差异将被发送到表面接收器。因为差异通常会比绝对数据少得多的数据位，所以可以传输更少的数据，以便在远程传感器/发射机中节省电池电量。在差异不显着的情况下，远程传感器/发射器需要传送更少的位。另一种方法使用温度比压力更慢的变化现象，并且以构成的帧格式传输数据，使得感测的压力数据的传输比特率高于感测的温度数据的传输速率。在本发明的另一种方法中，远程传感器/发射器被编程为休眠状态，其中远程传感器/发射器在其沿着井眼的同时消耗不可观察的电池电力。然后，遥控传感器/发射器在预定时间段到期之后或通过传输控制信号从睡眠状态转换到操作状态。

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