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：US07245930B1

公开(公告)日：2007-07-17

申请号：US09447684

申请日：1999-11-23

申请人： T G Vishwanath ,  Michael Parr ,  Zhen-Liang Shi ,  Simha Erlich

发明人： T G Vishwanath ,  Michael Parr ,  Zhen-Liang Shi ,  Simha Erlich

IPC分类号： H04B7/00

CPC分类号： H04B7/18532 ,  H04B1/69 ,  H04B2001/6912

摘要： A method for enabling synchronization of a communications terminal in a wireless communication system, and a corresponding acquisition system of the communications terminal, wherein the method consists of the steps of: receiving a burst at a receiver of the communications terminal, the burst containing a composite waveform including two or more component waveforms, wherein each of the two or more waveforms has a known frequency variation throughout the burst; detecting the presence of the composite waveform; and estimating a frequency offset and a timing offset of the composite waveform as received into the receiver, whereby synchronization is achieved.

摘要翻译： 一种用于实现无线通信系统中的通信终端和通信终端的相应采集系统的同步的方法，其中该方法包括以下步骤：在通信终端的接收机处接收脉冲串，该脉冲串包含复合 包括两个或多个分量波形的波形，其中两个或更多个波形中的每一个在整个脉冲串中具有已知的频率变化; 检测复合波形的存在; 并且估计接收到接收机中的复合波形的频率偏移和定时偏移，由此实现同步。

公开(公告)号：US06298220B1

公开(公告)日：2001-10-02

申请号：US09231071

申请日：1999-01-14

申请人： Andrew W. Barnhart ,  Michael Parr ,  Neville Mathews

发明人： Andrew W. Barnhart ,  Michael Parr ,  Neville Mathews

IPC分类号： H04B100

CPC分类号： H04W52/08 ,  H04B7/18543

摘要： A system for controlling/conserving signal transmission power in a communications system is disclosed. The system generally includes a first unit having a transmitter and a receiver, a second unit having a transmitter and a receiver, a forward communications channel between the first unit transmitter and the second unit receiver, and a reverse communications channel between the second unit transmitter and the first unit receiver. In operation, the system determines the received signal power needs of the second unit receiver. It then generates a reverse channel explicit-power-request command based on the determination of the received signal power needs of the second unit receiver. The reverse channel explicit-power-request command represents an absolute power level at which the first unit transmitter should transmit signals over the forward communications channel. In general, this reverse channel explicit-power-request command communicates the absolute power level in a manner that is independent of the power level at which the first unit transmitter had previously been transmitting with. The system also generates a forward channel explicit-power-notification message based on a determination of the transmitted signal power from the first unit transmitter. The forward channel explicit-power-notification message represents an absolute power level at which the first unit transmitter is transmitting signals over the forward communications channel.

摘要翻译： 公开了一种在通信系统中控制/节省信号传输功率的系统。 该系统通常包括具有发射机和接收机的第一单元，具有发射机和接收机的第二单元，第一单元发射机和第二单元接收机之间的前向通信信道，以及第二单元发射机和 第一单元接收器。 在操作中，系统确定第二单元接收机的接收信号功率需求。 然后，基于对第二单元接收机的接收信号功率需求的确定，生成反向信道显式功率请求命令。 反向信道显式功率请求命令表示第一单元发射机应该在正向通信信道上传输信号的绝对功率电平。 通常，该反向信道显式功率请求命令以与第一单元发射机先前已经发送的功率电平无关的方式传送绝对功率电平。 该系统还基于来自第一单元发射机的发送信号功率的确定，生成前向信道显式功率通知消息。 前向信道显式功率通知消息表示第一单元发射机正在通过前向通信信道发送信号的绝对功率电平。

公开(公告)号：US5659576A

公开(公告)日：1997-08-19

申请号：US279724

申请日：1994-07-25

申请人： David N. Critchlow ,  Michael Parr ,  Long Huynh

发明人： David N. Critchlow ,  Michael Parr ,  Long Huynh

IPC分类号： H03H17/04 ,  H04B7/005 ,  H04B1/38 ,  H04L5/16

CPC分类号： H04B7/005

摘要： A device and method for receiving a radio signal transmitted over a channel, selecting and deselecting an equalizer, and balancing processing in response to such selection. A radio frequency signal is received from a transmission channel into a receive path, and delay spread in the radio frequency signal is estimated using an analysis circuit. The analysis circuit also determines a threshold delay spread. In the event the estimated delay spread exceeds the threshold delay spread, an equalizer is selected, otherwise the equalizer is deselected. Similarly, in the event the estimated delay spread does not exceed the threshold delay spread, a high complexity processor is selected, otherwise a low complexity processor is selected. If the low complexity processor is selected, an output signal is generated using the low complexity processor, and if the high complexity processor is selected, the output signal is generated using the high complexity processor.

摘要翻译： 一种用于接收通过信道发送的无线电信号的装置和方法，选择和取消选择均衡器，以及响应于这种选择来平衡处理。 射频信号从传输信道被接收到接收路径中，并且使用分析电路来估计射频信号中的延迟扩展。 分析电路还确定阈值延迟扩展。 在估计延迟扩展超过阈值延迟扩展的情况下，选择均衡器，否则均衡器被取消选择。 类似地，在估计的延迟扩展不超过阈值延迟扩展的情况下，选择高复杂度的处理器，否则选择低复杂度的处理器。 如果选择低复杂度处理器，则使用低复杂度处理器产生输出信号，并且如果选择了高复杂度处理器，则使用高复杂度处理器来生成输出信号。

公开(公告)号：US5299198A

公开(公告)日：1994-03-29

申请号：US622232

申请日：1990-12-06

申请人： Stanley E. Kay ,  John E. Corrigan, III ,  Daniel Wendling ,  Ashok Mehta ,  Michael Parr

发明人： Stanley E. Kay ,  John E. Corrigan, III ,  Daniel Wendling ,  Ashok Mehta ,  Michael Parr

IPC分类号： G10L19/00 ,  H04B7/26 ,  H04J3/17 ,  H04L12/28 ,  H04L12/56 ,  H04W28/06 ,  H04W72/04 ,  H04J3/16

CPC分类号： H04W72/044 ,  G10L19/012 ,  H04B7/26 ,  H04B7/2643 ,  H04J3/172 ,  H04W28/06 ,  H04W72/0406

摘要： A mobile telephone system multiplexes plural voice traffic channels on a single carrier using a TDMA protocol. The capacity of the mobile telephone system is increased by assigning voice traffic capacity, not on a conversation basis, but on a speech spurt basis. In order to avoid compromising the voice transmission capacity, control signals (for the allocation and deallocation of both forward and reverse traffic channels) are sent using multiple diversity, i.e. both time and frequency. In addition, to increase the number of available control channels, a control channel comprises a sub-divided portion of an otherwise equivalent voice traffic slot. For reverse allocation requests, which are transmitted over a contention access channel, power diversity is used in addition to time and frequency diversity.

摘要翻译： 移动电话系统使用TDMA协议在单个载波上复用多个语音业务信道。 移动电话系统的容量通过分配语音流量来提高，而不是在对话的基础上，而是基于语音突发。 为了避免损害语音传输容量，使用多个分集即时间和频率来发送控制信号（用于正向和反向业务信道的分配和解除分配）。 此外，为了增加可用控制信道的数量，控制信道包括另外等价的话音业务时隙的分分割部分。 对于通过竞争接入信道发送的反向分配请求，除了时间和频率分集之外还使用功率分集。