公开(公告)号：US06385447B1

公开(公告)日：2002-05-07

申请号：US09115102

申请日：1998-07-13

申请人： Mohammad Soleimani ,  Moe Rahnema ,  Jean-Aicard Fabien ,  David Roos ,  Anthony Noerpel ,  Michael Parr

发明人： Mohammad Soleimani ,  Moe Rahnema ,  Jean-Aicard Fabien ,  David Roos ,  Anthony Noerpel ,  Michael Parr

IPC分类号： H04Q720

CPC分类号： H04B7/2125 ,  H04B7/18517 ,  H04B7/18539 ,  H04B7/18543 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/18571 ,  H04B7/1858 ,  H04B7/18582 ,  H04B7/19 ,  H04B7/2041 ,  H04W28/14 ,  H04W52/0203 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/00 ,  H04W76/10 ,  H04W76/25 ,  H04W80/00 ,  H04W84/06 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/20 ,  Y02D70/446

摘要： A system and method employing an access terminal for maintaining discontinuous communications including a gateway receiver for receiving the discontinuous information, a radio frequency (RF) communication link via geosynchronous earth orbit satellite for conveying multiple communication channels using time division multiple access (TDMA), the access terminal initiating information communication with the receiver via at least one of the multiple communication channels. The access terminal further includes a memory for storing protocol processing information and a transmitter for establishing the radio frequency communication link to the receiver of the terrestrial gateway system. The access terminal memory provides for destroying of a signal pattern or protocol assigned to the access terminal by the gateway receiver or transmission of keep-alive bursts by the transmitter during periods of inactivity to maintain information communication with the receiver.

摘要翻译： 一种使用接入终端维持不连续通信的系统和方法，包括用于接收不连续信息的网关接收器，经由地球同步轨道卫星的射频（RF）通信链路，用于使用时分多址（TDMA）传送多个通信信道， 接入终端经由多个通信信道中的至少一个发起与接收机的信息通信。 接入终端还包括用于存储协议处理信息的存储器和用于建立到地面网关系统的接收机的射频通信链路的发射机。 接入终端存储器提供由网关接收机破坏分配给接入终端的信号模式或协议，或者在不活动期间由发射机发送保持活动脉冲串，以维持与接收机的信息通信。

公开(公告)号：US06233451B1

公开(公告)日：2001-05-15

申请号：US09115096

申请日：1998-07-13

申请人： Anthony Noerpel ,  Chandra Joshi ,  Michael Parr ,  Zhengping Gao ,  Stephanie Demers

发明人： Anthony Noerpel ,  Chandra Joshi ,  Michael Parr ,  Zhengping Gao ,  Stephanie Demers

IPC分类号： H04Q720

CPC分类号： H04B7/2125 ,  H04B7/18517 ,  H04B7/18539 ,  H04B7/18543 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/18571 ,  H04B7/1858 ,  H04B7/18582 ,  H04B7/19 ,  H04B7/2041 ,  H04W28/14 ,  H04W52/0203 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/00 ,  H04W76/10 ,  H04W76/25 ,  H04W80/00 ,  H04W84/06 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/20 ,  Y02D70/446

摘要： An access terminal for initiating spot beam selection in a satellite communication system, in which the access terminal includes a receiver for measuring the received signal strength (RSS) of a multiplicity of radio frequency communication spot beam links. The access terminal is further provided with a microcontroller for comparing the received signal strengths from each of the multiplicity of spot beams to initiate information communication via a communication channel of the satellite communication system. In a described embodiment, the controller of the access terminal compares seven spot beam links to determine whether to initiate information communication with one of the seven spot beams received. Additionally, a memory coupled to the controller of the access terminal is used for storing spot beam identification information including the spot beam links assigned to the access terminal via the satellite communication system. The selection procedure employed by the system and method described facilitate a rapid selection of an appropriate spot beam identified from the multiplicity of radio frequency spot beam links received at a mobile access terminal.

摘要翻译： 一种用于在卫星通信系统中发起点波束选择的接入终端，其中接入终端包括用于测量多个射频通信点波束链路的接收信号强度（RSS）的接收机。 接入终端还设置有微控制器，用于比较来自多个点波束中的每一个的接收信号强度，以通过卫星通信系统的通信信道发起信息通信。 在所描述的实施例中，接入终端的控制器比较七个点波束链路，以确定是否发起与所接收的七个点波束中的一个的信息通信。 此外，耦合到接入终端的控制器的存储器用于存储包括经由卫星通信系统分配给接入终端的点波束链路的点波束识别信息。 所述系统采用的选择过程和方法有助于快速选择从在移动接入终端处接收的多个射频点波束链路识别的适当的点波束。

公开(公告)号：US06515617B1

公开(公告)日：2003-02-04

申请号：US09200133

申请日：1998-11-25

申请人： Stephanie Demers ,  Michael Parr ,  Anthony Noerpel ,  Dave Roos

发明人： Stephanie Demers ,  Michael Parr ,  Anthony Noerpel ,  Dave Roos

IPC分类号： H04B7185

CPC分类号： G01S19/252 ,  G01S5/0063 ,  G01S5/0252 ,  G01S2205/008

摘要： A system (20) and method (30) for estimating the location of a terrestrial-based user terminal (23) is provided. The user terminal (23) is capable of measuring the relative signal strengths of a plurality of spot beams pilot signal emitted from a geostationary satellite (22). The user terminal (23) then estimates its position based on the measured relative signal strengths. Using this approach, the user terminal (23) can quickly determine its location without prior knowledge of its position or delay time.

摘要翻译： 提供了一种用于估计地面用户终端（23）的位置的系统（20）和方法（30）。 用户终端（23）能够测量从地球静止卫星（22）发射的多个点波束导频信号的相对信号强度。 然后，用户终端（23）基于所测量的相对信号强度来估计其位置。 使用这种方法，用户终端（23）可以在不知道其位置或延迟时间的情况下快速地确定其位置。

公开(公告)号：US06721538B1

公开(公告)日：2004-04-13

申请号：US09678681

申请日：2000-10-05

申请人： John Sullivan ,  David Roos ,  Michael Parr

发明人： John Sullivan ,  David Roos ,  Michael Parr

IPC分类号： H04B719

CPC分类号： H04B7/18517

摘要： An approach for minimizing variation in transmit power of synchronized signals that are destined to a satellite is disclosed. A gateway station system for communicating with a communication satellite includes a multiple signal sources which generate the synchronized signals. The gateway station system utilizes a control logic that is coupled to the signal sources. The control logic operates to offset selectively transmission times of a portion of the synchronized signals according to a predetermined distribution and an offset period. The predetermined distribution specifies about half the number of the synchronized signals are to be offset. The offset period is half a symbol period. The terminals within the satellite communication system has a receiver that receives the synchronized signal from the communication satellite. Each of the terminals also includes an offset-determination logic that is coupled to the receiver and determines whether the synchronized signals are offset based upon a received assignment message. The assignment message has a control flag field that indicates whether the received signal is offset.

摘要翻译： 公开了一种用于最小化发往卫星的同步信号的发射功率变化的方法。 用于与通信卫星通信的网关站系统包括产生同步信号的多个信号源。 网关站系统利用耦合到信号源的控制逻辑。 控制逻辑操作以根据预定分布和偏移周期选择性地偏移同步信号的一部分的传输时间。 预定分布规定了大约一半的同步信号的数量将被偏移。 偏移周期是符号周期的一半。 卫星通信系统内的终端具有接收来自通信卫星的同步信号的接收机。 每个终端还包括耦合到接收机的偏移确定逻辑，并且基于接收到的分配消息来确定同步信号是否被偏移。 分配消息具有指示接收到的信号是否被偏移的控制标志字段。

公开(公告)号：US09164163B2

公开(公告)日：2015-10-20

申请号：US13398776

申请日：2012-02-16

申请人： Michael Parr ,  Michael Rodgers

发明人： Michael Parr ,  Michael Rodgers

IPC分类号： G01S5/12

CPC分类号： G01S5/12

摘要： A device is provided for use with a satellite and a receiver having a local oscillator. The satellite is traveling in a vector and transmits a signal having an expected frequency. The receiver receives a received signal having a received signal frequency. The device includes: a Doppler shift measuring portion measuring a Doppler shift Dm; a predetermined Doppler shift storage portion storing a predetermined received Doppler shift Dp; a received signal Doppler shift error calculating portion calculating a received signal Doppler shift error De; a predetermined receiver position storage portion storing a predetermined position Pp of the receiver; and a receiver position estimating portion calculating an estimated receiver position Pe based on the predetermined position Pp of the receiver and the received signal Doppler shift error De.

摘要翻译： 提供了一种用于卫星和具有本地振荡器的接收机的设备。 卫星以矢量行进，发射具有预期频率的信号。 接收机接收具有接收信号频率的接收信号。 该装置包括：测量多普勒频移Dm的多普勒频移测量部分; 存储预定的接收多普勒频移Dp的预定多普勒频移存储部; 接收信号多普勒频移误差计算部分计算接收信号多普勒频移误差De; 存储接收器的预定位置Pp的预定接收器位置存储部分; 以及接收机位置估计部分，基于接收机的预定位置Pp和接收信号多普勒频移误差De计算估计的接收机位置Pe。

公开(公告)号：US20050056260A1

公开(公告)日：2005-03-17

申请号：US10662840

申请日：2003-09-15

申请人： Benjamin Ellies ,  Mark Johnston ,  Guojun Shi ,  Michael Parr

发明人： Benjamin Ellies ,  Mark Johnston ,  Guojun Shi ,  Michael Parr

IPC分类号： F02D41/00 ,  F02D41/06 ,  F02M25/08 ,  F02M33/02 ,  F02M51/00

CPC分类号： F02D41/065 ,  F02D41/187 ,  F02D2041/1432 ,  F02D2041/1433 ,  F02D2041/2065 ,  F02D2200/0414

摘要： Methods and apparatus for accurately predicting a fuel injector tip temperature (FITT) are described. One technique for predicting the temperature of a fuel injector tip in an engine suitably includes the steps of estimating an initial temperature of the fuel injector tip and calculating a steady state temperature of the fuel injector tip. A filter coefficient is determined as a function of a rate of airflow into the engine, and the temperature of the fuel injector tip is predicted as a function of said initial temperature, the steady state temperature, and the filter coefficient. In a further embodiment, the steady state temperature is filtered into a feedback temperature at a rate that is determined by the filter coefficient.

摘要翻译： 描述了用于精确地预测燃料喷射器喷嘴温度（FITT）的方法和装置。 用于预测发动机中的燃料喷射器尖端的温度的一种技术适当地包括估计燃料喷射器尖端的初始温度并计算燃料喷射器尖端的稳态温度的步骤。 根据进入发动机的气流速度确定滤波器系数，并且根据所述初始温度，稳态温度和滤波器系数预测燃料喷射器尖端的温度。 在另一实施例中，将稳态温度以由滤波器系数确定的速率滤波成反馈温度。

公开(公告)号：US11103096B1

公开(公告)日：2021-08-31

申请号：US16267536

申请日：2019-02-05

申请人： Michael Parr ,  Sara Parr

发明人： Michael Parr ,  Sara Parr

IPC分类号： A47G29/122 ,  A47G29/124 ,  G06K7/10 ,  G06K19/06 ,  H04W4/80 ,  A47G29/14

摘要： The secure parcel delivery receptacle comprises a parcel receptacle, a locking cover, a scanner, and a camera. The parcel receptacle may be a container into which the parcel may be placed. Access to the parcel receptacle may be via the locking cover which may only be unlocked by the scanner. The scanner may scan the parcel using wireless technology, optical technology, or a combination thereof to determine parcel identification information from the parcel. The parcel identification information may comprise or may be associated with a one-time code that will unlock the locking cover one time only. The camera may record one or more images as proof of delivery. The scanner may transmit one or more wireless messages containing status information regarding attempts to access the secure parcel delivery receptacle to the purchaser, to the seller, or to both.

公开(公告)号：US07016444B2

公开(公告)日：2006-03-21

申请号：US10106940

申请日：2002-03-26

申请人： Michael Parr ,  Sharath Ananth ,  Long Huynh ,  Drew Barnett ,  Fred Harris

发明人： Michael Parr ,  Sharath Ananth ,  Long Huynh ,  Drew Barnett ,  Fred Harris

IPC分类号： H04L7/00

CPC分类号： H04L7/0054 ,  H04B7/2125

摘要： Filtering loop and method for maintaining synchronization between a receiver and a transmitter reduces overhead and enables more robust operation. The method includes the step of receiving an error signal corresponding to a synchronization parameter. A first order filter is applied to the error signal such that a residual signal results. The method further provides for compensating the residual signal for drift such that the compensated residual signal estimates a rate of change in the residual signal. By compensating the residual signal for drift, difficulties associated with time lag and signal degradation are obviated.

公开(公告)号：US06771615B1

公开(公告)日：2004-08-03

申请号：US09642283

申请日：2000-08-18

申请人： Yunsang Park ,  Michael Parr

发明人： Yunsang Park ,  Michael Parr

IPC分类号： H04J306

CPC分类号： H04L1/0057 ,  H04L1/0071

摘要： An approach for providing message synchronization in a communication system is disclosed. Using a selected channel coding method (e.g., Golay coding), an encoder encodes a message for transmission over a communication channel. An interleaver applies a predetermined interleaving pattern to the encoded message. A mask pattern with a prescribed sequence of bits is applied to the interleaved message; the prescribed sequence is ordered to eliminate an all zeros bit pattern and an all ones bit pattern. A multiplexer multiplexes the masked message with data traffic over the communication channel. The masked message is segmented into multiple blocks of a fixed length. At the receiver side, the mask pattern is applied to the demultiplexed message. The message is de-interleaved and decoded to restore the original message. Such an approach synchronizes the message blocks without adding overhead bits for synchronization and has particular applicability to the synchronization of power control messages in a satellite communication system.

摘要翻译： 公开了一种在通信系统中提供消息同步的方法。 使用所选择的信道编码方法（例如，Golay编码），编码器对通过信道进行传输的消息进行编码。 交织器将预定的交织模式应用于编码消息。 具有规定的比特序列的掩码图案被应用于交织的消息; 规定的顺序被排序以消除全零位模式和全1位模式。 复用器通过通信信道将掩蔽消息与数据业务复用。 被屏蔽的消息被分割成固定长度的多个块。 在接收机侧，将掩模图案应用于解复用的消息。 消息被解交织并解码以恢复原始消息。 这种方法使消息块同步，而不增加用于同步的开销位，并且具有对卫星通信系统中的功率控制消息的同步的特别适用性。

公开(公告)号：US6028901A

公开(公告)日：2000-02-22

申请号：US246851

申请日：1994-05-19

申请人： Long Huynh ,  Michael Parr

发明人： Long Huynh ,  Michael Parr

IPC分类号： H04B7/005 ,  H04B1/10 ,  H03H7/30

CPC分类号： H04B7/005

摘要： A device and method of selecting and deselecting an equalizer in a digital communications receiver. The method includes receiving a receiver signal, estimating an estimated delay spread in the receiver signal, and determining a threshold delay spread. In the event the estimated delay spread exceeds the threshold delay spread, the method includes selecting the equalizer. In the event the estimated delay spread does not exceed the threshold delay spread, the method includes deselecting the equalizer. The method also includes generating a receiver output signal in response to an equalizer signal in the event the equalizer is selected, and generating the receiver output signal in response to the receiver signal in the event the delay spread does not exceed the threshold. The device includes a radio receiver that receives the receiver signal and an analysis circuit coupled to the radio receiver. The analysis circuit estimates the estimated delay spread in the radio signal, and determines the threshold delay spread. The receiver also includes an equalizer that equalizes the receiver signal and generates an equalizer signal in response thereto; a switching device that selects the equalizer in the event the delay spread exceeds the threshold, and deselects the equalizer in the event the delay spread does not exceed the threshold. A system output is further included that generates a receiver output signal in response to the equalizer signal or the receiver signal depending on whether the equalizer is selected.

摘要翻译： 一种在数字通信接收机中选择和取消选择均衡器的装置和方法。 该方法包括接收接收机信号，估计接收机信号中估计的延迟扩展，以及确定阈值延迟扩展。 在估计延迟扩展超过阈值延迟扩展的情况下，该方法包括选择均衡器。 在估计延迟扩展不超过阈值延迟扩展的情况下，该方法包括取消选择均衡器。 该方法还包括在选择均衡器的情况下响应于均衡器信号产生接收器输出信号，并且在延迟扩展不超过阈值的情况下响应于接收器信号而生成接收器输出信号。 该装置包括接收接收机信号的无线电接收机和耦合到该无线电接收机的分析电路。 分析电路估计无线电信号中估计的延迟扩展，并确定阈值延迟扩展。 接收机还包括均衡器，其均衡接收机信号并响应于此产生均衡器信号; 在延迟扩展超过阈值的情况下选择均衡器的开关装置，并且在延迟扩展不超过阈值的情况下取消选择均衡器。 还包括系统输出，其根据均衡器是否被选择，响应于均衡器信号或接收器信号产生接收器输出信号。