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1.发明授权System and method for narrowing the range of frequency uncertainty of a doppler shifted signal 失效用于缩小多普勒偏移信号的频率不确定度范围的系统和方法公开(公告)号：US06249539B1
公开(公告)日：2001-06-19
申请号：US09097842
申请日：1998-06-15
IPC分类号： H04B1500
CPC分类号： H04B7/216 , G01S19/29 , H04B1/707 , H04L2027/0034
摘要： A system and method for narrowing the range of frequency uncertainty of a Doppler shifted pilot signal in a satellite or other communications system with relative signal source and receiver motion. The satellite communications system includes a user terminal (for example, a mobile wireless telephone), a gateway (terrestrial base station), and at least one satellite with unknown position and unknown relative velocity. The method includes the steps of shifting the pilot signal over a plurality of frequency hypotheses, coherently accumulating samples of the pilot signal over a plurality of chips, measuring the energy of the accumulated pilot signal samples, accumulating the energy measurements over a plurality of chips to produce an energy accumulation value, and determining which of the plurality of frequency hypotheses results in the highest energy accumulation value.
摘要翻译： 一种用于在具有相对信号源和接收机运动的卫星或其他通信系统中缩小多普勒频移导频信号的频率不确定度的范围的系统和方法。 卫星通信系统包括用户终端（例如，移动无线电话），网关（地面基站）和至少一个具有未知位置和未知相对速度的卫星。 该方法包括以下步骤：通过多个频率假设移位导频信号，通过多个码片相干累加导频信号的采样，测量累积的导频信号样本的能量，将多个码片上的能量测量累积到 产生能量累积值，并且确定多个频率假设中的哪一个导致最高的能量积累值。
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2.发明授权System and method for narrowing the range of frequency uncertainty of a doppler shifted signal 失效用于缩小多普勒偏移信号的频率不确定度范围的系统和方法公开(公告)号：US06831940B2
公开(公告)日：2004-12-14
申请号：US09885755
申请日：2001-06-19
IPC分类号： H04B1500
CPC分类号： H04B7/216 , G01S19/29 , H04B1/707 , H04L2027/0034
摘要： A system and method for narrowing the range of frequency uncertainty of a Doppler shifted pilot signal in a satellite or other communications system with relative signal source and receiver motion. The satellite communications system includes a user terminal (for example, a mobile wireless telephone), a gateway (terrestrial base station), and at least one satellite with unknown position and unknown relative velocity. The method includes the steps of shifting the pilot signal over a plurality of frequency hypotheses, coherently accumulating samples of the pilot signal over a plurality of chips, measuring the energy of the accumulated pilot signal samples, accumulating the energy measurements over a plurality of chips to produce an energy accumulation value, and determining which of the plurality of frequency hypotheses results in the highest energy accumulation value.
摘要翻译： 一种用于在具有相对信号源和接收机运动的卫星或其他通信系统中缩小多普勒频移导频信号的频率不确定度的范围的系统和方法。 卫星通信系统包括用户终端（例如，移动无线电话），网关（地面基站）和至少一个具有未知位置和未知相对速度的卫星。 该方法包括以下步骤：通过多个频率假设移位导频信号，通过多个码片相干累加导频信号的采样，测量累积的导频信号样本的能量，将多个码片上的能量测量累积到 产生能量累积值，并且确定多个频率假设中的哪一个导致最高的能量积累值。
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3.发明授权Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel 失效使用正交波形使多个发射机能够共享单个CDM信道
公开(公告)号：US6134215A
公开(公告)日：2000-10-17
申请号：US627831
申请日：1996-04-02
申请人： Avneesh Agrawal , Brian K. Butler
发明人： Avneesh Agrawal , Brian K. Butler
CPC分类号： H04J13/0048 , H04J13/18
摘要： A system and method for enabling multiple transmitters (400) to share a single code division multiplexed (CDM) or code division multiple access (CDMA) channel using orthogonal waveforms. A set of orthogonal channelizing codes W.sub.i (t) is generated, and each transmitter (400) is allocated orthogonal channelizing codes and pseudonoise polynomials in a predetermined manner. The transmitters channelize each user signal using an orthogonal channelizing code W.sub.i (t), and spread each user signal using a pseudonoise (PN) spreading code. Each transmitter employs the same PN spreading codes and time offsets. Additionally, no one orthogonal channelizing code is assigned to more than one transmitter during the time period they are sharing a CDM channel. The spread signals are summed at each transmitter (404) prior to transmission as a composite signal. The offsets are time-precorrected (406, 510) to ensure time alignment at the receivers. The frequencies of the signals are precorrected (408, 512) to ensure frequency alignment at the receivers.
摘要翻译： 一种用于使多个发射机（400）能够使用正交波形来共享单个码分多路复用（CDM）或码分多址（CDMA）信道的系统和方法。 生成一组正交信道化码Wi（t），并且以预定的方式为每个发射机（400）分配正交信道化码和伪噪声多项式。 发射机使用正交信道化码Wi（t）对每个用户信号进行信道化，并且使用伪噪声（PN）扩频码来扩展每个用户信号。 每个发射机采用相同的PN扩展码和时间偏移。 另外，在共享CDM信道的时间段期间，没有一个正交信道化码被分配给多个发射机。 扩展信号在发送之前在每个发射机（404）处相加，作为复合信号。 偏移量被时间预校正（406,510），以确保接收器处的时间对准。 信号的频率被预先校正（408,512）以确保接收器处的频率对准。
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公开(公告)号：US06608858B1
公开(公告)日：2003-08-19
申请号：US09491349
申请日：2000-01-26
申请人： Gilbert C. Sih , Avneesh Agrawal , Mark Roh , Brian K. Butler , Raghu Challa
发明人： Gilbert C. Sih , Avneesh Agrawal , Mark Roh , Brian K. Butler , Raghu Challa
IPC分类号： H04B1707
CPC分类号： H04B1/7087 , H04B1/7115 , H04B1/7117 , H04B2201/70701 , H04L27/0014 , H04L2027/0032 , H04L2027/0057 , H04L2027/0087
摘要： A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.
摘要翻译： 描述了用于频率跟踪的方法和装置。 本发明提供了一种用于消除由于频率偏移引起的误差的影响的跟踪机制以及由多个多径信号中的多普勒引起的频率误差的补偿。 利用本发明的RAKE接收机的每个手指将计算该手指的频率误差。 计算并滤波所有这些频率误差的加权平均值，以提供用于改变IF和RF频率合成器的频率的控制信号，从而考虑每个手指处的共同频率偏移。 此外，每个手指配备有用于提供特定于该手指的频率调节的旋转器。 每个手指的频率通过该手指的频率误差的反馈进行调整。
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公开(公告)号：US06584313B2
公开(公告)日：2003-06-24
申请号：US09828588
申请日：2001-04-05
申请人： Brian K. Butler , Haitao Zhang , Edward G. Tiedemann, Jr. , Qiuzhen Zou , Gilbert C. Sih , Avneesh Agrawal
发明人： Brian K. Butler , Haitao Zhang , Edward G. Tiedemann, Jr. , Qiuzhen Zou , Gilbert C. Sih , Avneesh Agrawal
IPC分类号： H04Q720
CPC分类号： H04B1/70751 , H04B1/7077 , H04B1/70775 , H04B1/7115 , H04B2201/70701 , H04B2201/70702 , H04W52/0229 , Y02D70/40
摘要： A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.
摘要翻译： 描述了一种用于执行寻呼的新颖和改进的方法。 在本发明的一个实施例中，搜索器用于检测扩频信号。 样品接收的RF信号存储在样品缓冲液中。 在待机模式期间，在分配给移动台的寻呼时隙期间收集采样。 对样本执行一组搜索，并且如果检测到导频信号，则执行附加解调以检测寻呼消息。 可以组合所得到的解调数据集以增加检测。 在检测到页面消息之后，可以激活附加解调资源以处理更完整的页面消息或其他信息信道。 在本发明的一个实施例中，搜索器包括一个解调器，用于执行快速页面检测，而无需使用手指元件来减少空闲模式功耗。
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公开(公告)号：US06243561B1
公开(公告)日：2001-06-05
申请号：US09172068
申请日：1998-10-13
申请人： Brian K. Butler , Haitao Zhang , Edward G. Tiedemann, Jr. , Qiuzhen Zou , Gilbert C. Sih , Avneesh Agrawal
发明人： Brian K. Butler , Haitao Zhang , Edward G. Tiedemann, Jr. , Qiuzhen Zou , Gilbert C. Sih , Avneesh Agrawal
IPC分类号： H04L2706
CPC分类号： H04B1/70751 , H04B1/7077 , H04B1/70775 , H04B1/7115 , H04B2201/70701 , H04B2201/70702 , H04W52/0229 , Y02D70/40
摘要： A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.
摘要翻译： 描述了一种用于执行寻呼的新颖和改进的方法。 在本发明的一个实施例中，搜索器用于检测扩频信号。 样本接收的RF信号被存储在样本缓冲器中。 在待机模式期间，在分配给移动台的寻呼时隙期间收集采样。 对样本执行一组搜索，并且如果检测到导频信号，则执行附加解调以检测寻呼消息。 可以组合所得到的解调数据集以增加检测。 在检测到页面消息之后，可以激活附加解调资源以处理更完整的页面消息或其他信息信道。 在本发明的一个实施例中，搜索器包括一个解调器，用于执行快速页面检测，而无需使用手指元件来减少空闲模式功耗。
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公开(公告)号：US06594303B1
公开(公告)日：2003-07-15
申请号：US09228470
申请日：1999-01-11
IPC分类号： H04B169
CPC分类号： H04B1/707 , H04B2201/70701
摘要： Techniques for coherent demodulation in the presence of phase discontinuities is described. In the exemplary embodiment, times when phase discontinuities occur are known apriori by a receiver in which demodulation is being performed. In an alternate embodiment, the discontinuity location is signaled to the receiver in advance by the transmitter which generates the signals being demodulated. A pilot signal is prepared for optimal coherent demodulation by the use of two filters: one capable of withstanding the effects of phase discontinuity; a second providing superior filtering performance than the first so long as phase discontinuities are not present. Both filters are simultaneously operated. However, the superior performing filter is selected for use in demodulation whenever possible.
摘要翻译： 描述了存在相位不连续性的相干解调技术。 在示例性实施例中，发生相位不连续性的时间是正在执行解调的接收机所知道的。 在替代实施例中，不连续位置由产生被解调的信号的发射机预先发送给接收机。 通过使用两个滤波器来准备导频信号以实现最佳相干解调：一个能够承受相位不连续性的影响; 只要不存在相位不连续性，第二个提供比第一个优越的滤波性能。 两个过滤器同时运行。 然而，优选执行滤波器被选择用于解调，只要可能。
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8.发明授权Method and apparatus for maximizing standby time using a quick paging channel 有权使用快速寻呼信道最大化待机时间的方法和装置公开(公告)号：US06421540B1
公开(公告)日：2002-07-16
申请号：US09252846
申请日：1999-02-19
IPC分类号： H04Q720
CPC分类号： H04L1/0071 , H04L1/0002 , H04L1/0025 , H04L1/0068 , H04W36/18 , H04W52/0216 , H04W52/0219 , H04W52/0245 , H04W52/24 , H04W52/40 , H04W52/44 , H04W52/58 , H04W68/025 , Y02D70/20
摘要： A quick paging system having a base station, a plurality of terminals, and a full paging channel having a plurality of slots for transmitting paging information to the terminals is described. A quick paging channel having a plurality of quick paging channel slots each corresponding to a full paging channel slot is provided wherein at least one indicator is positioned within a selected quick paging channel slot that instructs at least one selected terminal corresponding to the at least one indicator in the quick paging slot to monitor the corresponding full paging channel slot.
摘要翻译： 描述具有基站，多个终端和具有用于向终端发送寻呼信息的多个时隙的完整寻呼信道的快速寻呼系统。 提供了具有多个快速寻呼信道时隙的快速寻呼信道，每个快速寻呼信道时隙各自对应于完整的寻呼信道时隙，其中至少一个指示符位于所选择的快速寻呼信道时隙内，所述快速寻呼信道时隙指示对应于所述至少一个指示符 在快速寻呼时隙中监控相应的完整寻呼信道时隙。
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公开(公告)号：US10064179B2
公开(公告)日：2018-08-28
申请号：US12622202
申请日：2009-11-19
申请人： Rajiv Vijayan , Avneesh Agrawal , Sanjay Jha
发明人： Rajiv Vijayan , Avneesh Agrawal , Sanjay Jha
CPC分类号： H04W72/0453 , H04L5/0007 , H04L5/0037 , H04L5/0066 , H04L27/2614 , H04W52/343 , H04W52/367
摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.
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公开(公告)号：US09801188B2
公开(公告)日：2017-10-24
申请号：US12260849
申请日：2008-10-29
申请人： Aamod Khandekar , Avneesh Agrawal , Ashwin Sampath , Gavin B. Horn , Alexei Gorokhov , Naga Bhushan , Tingfang Ji
发明人： Aamod Khandekar , Avneesh Agrawal , Ashwin Sampath , Gavin B. Horn , Alexei Gorokhov , Naga Bhushan , Tingfang Ji
CPC分类号： H04W72/082 , H04W52/243 , H04W72/0426 , H04W84/045 , H04W92/20 , Y02D70/00
摘要： Providing for interference reduction and/or avoidance utilizing backhaul signaling between wireless access points (APs) of a wireless access network (AN) is described herein. By way of example, an interference avoidance request (IAR) can be issued by an AP to reduce signal interference on forward link (FL) and/or downlink (DL) transmissions by neighboring APs. The IAR can be routed via a backhaul network and/or over-the-air via access terminals (ATs) coupled with the AP or one or more interfering APs. Upon receiving the IAR, an interfering AP can determine reduced transmit power levels for FL and/or RL transmissions and respond to the IAR. The response can include reduced power levels and can be sent via the backhaul network or OTA. By employing the backhaul network in full or in part, interference avoidance can be conducted even for semi-planned or unplanned heterogeneous networks coupled by the backhaul.
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