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1. 发明授权

US5574989A Time division multiple access cellular communication system and method employing base station diversity transmission 失效
标题翻译：时分多址蜂窝通信系统及采用基站分集传输的方法
公开(公告)号：US5574989A
公开(公告)日：1996-11-12
申请号：US322963
申请日：1994-10-13
申请人： John Watson , Youngky Kim , Long Huynh , Michael Parr
发明人： John Watson , Youngky Kim , Long Huynh , Michael Parr
IPC分类号： H04B7/06
CPC分类号： H04B7/0671
摘要： A cellular base station (10) in a digital cellular system employs transmitting circuitry in which voice signals (15) are processed at a low frequency level (12) into two separate paths. A first of the low frequency signals is variably delayed (20), and the first and the other low frequency signals are upconverted to radio frequency level (16,22) for transmission over independent time-spaced transmission paths (26,28) to cellular receivers. A receiver downconverts and demodulates the radio frequency diversity signals, and then combines the demodulated diversity signals to generate an equalized combination diversity signal for receiver output processing.
摘要翻译：数字蜂窝系统中的蜂窝基站（10）采用传输电路，其中语音信号（15）以低频级（12）处理成两个独立的路径。低频信号中的第一个被可变地延迟（20），并且第一和另外的低频信号被上变频到射频电平（16,22），用于通过独立的时间间隔传输路径（26,28）传输到蜂窝接收器。接收机下变频和解调射频分集信号，然后组合解调分集信号，以产生用于接收机输出处理的均衡组合分集信号。

2. 发明授权

US07016444B2 Filter loop structure for synchronization in a mobile communication terminal and a method of using the same 有权
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.

3. 发明授权

US6028901A Receiver selection based on delay spread estimation 失效
标题翻译：基于延迟扩展估计的接收机选择
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。

4. 发明授权

US5513221A Doppler bandwidth dependent estimation of a communications channel 失效
标题翻译：通信信道的多普勒带宽相关估计
公开(公告)号：US5513221A
公开(公告)日：1996-04-30
申请号：US279965
申请日：1994-08-25
申请人： Michael Parr , Long Huynh
发明人： Michael Parr , Long Huynh
IPC分类号： H03H17/04 , H04B7/005 , H03H7/30 , H03H7/40 , H03K5/159 , H04L27/06
CPC分类号： H04B7/005
摘要： A device and method of adjusting an equalizer in a digital communications receiver in response to relative velocity between the communications receiver and a communications transmitter. A radio frequency receiver receives a radio frequency signal from the communications transmitter through a communications channel, and an analog to digital converter digitizes a first portion of the radio frequency signal during a first time period, and generates a first data signal made up of digital samples. The analog to digital converter also digitizes a second portion of the radio frequency signal during a second time period and generates a second data signal, also made up of samples. A channel estimator estimates characteristics of the communications channel in response to a portion of the first data signal, and generates a first channel estimate in response thereto. Finally, a processor determines an estimated velocity of the communications receiver relative to the communications transmitter, weights the first channel estimate in response to the estimated velocity, and generates a revised channel estimate in response to the weighting of the first channel estimate and the second data signal.
摘要翻译：一种响应于通信接收机和通信发射机之间的相对速度来调整数字通信接收机中的均衡器的装置和方法。射频接收机通过通信信道从通信发射机接收射频信号，并且模数转换器在第一时间段内数字化第一部分射频信号，并产生由数字样本组成的第一数据信号。模数转换器还在第二时间段期间对第二部分的射频信号进行数字化，并产生也由采样构成的第二数据信号。信道估计器响应于第一数据信号的一部分来估计通信信道的特性，并响应于此产生第一信道估计。最后，处理器确定通信接收机相对于通信发射机的估计速度，以响应于所估计的速度对第一信道估计进行加权，并且响应于第一信道估计和第二数据的加权生成经修订的信道估计信号。

5. 发明授权

US5659576A Balanced processing based on receiver selection 失效
标题翻译：基于接收机选择的平衡处理
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。

6. 发明授权

US09164163B2 System and method for estimating terminal position based on non-geostationary communication satellite signals 有权
标题翻译：基于非对地静止通信卫星信号估计终端位置的系统和方法
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。

7. 发明申请

US20050056260A1 METHOD AND APPARATUS FOR PREDICTING A FUEL INJECTOR TIP TEMPERATURE 有权
标题翻译：燃料注射器温度预测方法和装置
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。

8. 发明授权

US06385447B1 Signaling maintenance for discontinuous information communications 失效
标题翻译：不间断信息通信的信令维护
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。

9. 发明授权

US06515617B1 Method and system for position determination using geostationary earth orbit satellite 有权
标题翻译：使用地球静止轨道卫星进行位置确定的方法和系统
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。

10. 发明授权

US06418158B1 Synchronization in mobile satellite systems using dual-chirp waveform 有权
标题翻译：使用双啁啾波形的移动卫星系统中的同步
公开(公告)号：US06418158B1
公开(公告)日：2002-07-09
申请号：US09447685
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： H04L2730
CPC分类号： H04B7/2125
摘要： A waveform to be transmitted as a burst within a channel that is used for the synchronization of unsynchronized wireless communications terminals in a wireless communications system, and a method of synchronization involving the waveform, that consists of a composite waveform. The composite waveform comprises two or more component waveforms, wherein each of the two or more component waveforms has a known frequency variation throughout the burst. The composite waveform has a composite bandwidth on an order of an available channel bandwidth and each of said two or more component waveforms have a component bandwidth on the order of the available channel bandwidth. Furthermore, a range of values for the differences between the instantaneous frequencies of two of said two or more component waveforms is on an order of twice of said available channel bandwidth.
摘要翻译：要在无线通信系统中用于同步非同步无线通信终端的信道内作为突发传送的波形，以及由复合波形组成的涉及波形的同步方法。复合波形包括两个或更多个分量波形，其中两个或更多个分量波形中的每一个在整个脉冲串中具有已知的频率变化。复合波形具有可用信道带宽的顺序的复合带宽，并且所述两个或更多个分量波形中的每一个具有在可用信道带宽的顺序上的分量带宽。此外，所述两个或多个分量波形中的两个的瞬时频率之间的差异的值的范围是所述可用信道带宽的两倍。

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