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公开(公告)号：US08559895B2
公开(公告)日：2013-10-15
申请号：US12567181
申请日：2009-09-25
申请人： Ivan Jesus Fernandez-Corbaton , Ahmad Jalali , Ernest T. Ozaki , Harris Smith Simon , Sherman A. Gregory
发明人： Ivan Jesus Fernandez-Corbaton , Ahmad Jalali , Ernest T. Ozaki , Harris Smith Simon , Sherman A. Gregory
IPC分类号： H04B1/04
CPC分类号： H01Q25/00
摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.
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公开(公告)号：US20100008453A1
公开(公告)日：2010-01-14
申请号：US12567181
申请日：2009-09-25
申请人： Ivan Jesus Fernandez-Corbaton , Ahmad Jalali , Ernest T. Ozaki , Harris Smith Simon , Sherman A. Gregory
发明人： Ivan Jesus Fernandez-Corbaton , Ahmad Jalali , Ernest T. Ozaki , Harris Smith Simon , Sherman A. Gregory
CPC分类号： H01Q25/00
摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.
摘要翻译： 至少一个特征提供了使用自适应或定向天线执行点对多点传输的方式，同时减少天线模式失真。 通常，不是将相同的波形发送到两个或更多个接收机，而是将信息承载信号变换成不同的去相关波形，并将每个去相关的波形发送到不同的接收机。 在一个实现中，信息承载信号被变换成两个去相关信号，使得其信息载运信号的互相关或自相关为零或非常小。 这种去相关可以通过向第一接收机发送第一信号来实现，同时向第二接收机发送具有作为第一信号的频谱反转版本的射频频谱的第二信号。 在另一实现中，第一信号被发送到第一接收机，并且还以时间延迟被发送到第二接收机。
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公开(公告)号：US07610025B2
公开(公告)日：2009-10-27
申请号：US11182236
申请日：2005-07-15
申请人： Ivan Jesus Fernandez-Corbaton , Ahmad Jalali , Ernest T. Ozaki , Harris Smith Simon , Sherman A. Gregory
发明人： Ivan Jesus Fernandez-Corbaton , Ahmad Jalali , Ernest T. Ozaki , Harris Smith Simon , Sherman A. Gregory
IPC分类号： H04B1/04
CPC分类号： H01Q25/00
摘要： At least one feature provides a way to perform point-to-multipoint transmissions using adaptive or directional antennas while reducing antenna pattern distortion. Generally, rather than transmitting the same waveform to two or more receivers, an information-bearing signal is transformed into different decorrelated waveforms and each decorrelated waveform is transmitted to a different receiver. In one implementation, an information-bearing signal is transformed into two decorrelated signals such that their crosscorrelation, or autocorrelation of the information-bearing signal, is zero or very small. Such decorrelation may be achieved by sending a first signal to a first receiver while sending a second signal, having a radio frequency spectrum that is the spectrally inverted version of the first signal, to a second receiver. In another implementation, a first signal is transmitted to a first receiver and is also transmitted to a second receiver with a time delay.
摘要翻译： 至少一个特征提供了使用自适应或定向天线执行点对多点传输的方式，同时减少天线模式失真。 通常，不是将相同的波形发送到两个或更多个接收机，而是将信息承载信号变换成不同的去相关波形，并将每个去相关的波形发送到不同的接收机。 在一个实现中，信息承载信号被变换成两个去相关信号，使得其信息载运信号的互相关或自相关为零或非常小。 这种去相关可以通过向第一接收机发送第一信号来实现，同时向第二接收机发送具有作为第一信号的频谱反转版本的射频频谱的第二信号。 在另一实现中，第一信号被发送到第一接收机，并且还以时间延迟被发送到第二接收机。
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公开(公告)号：US07012883B2
公开(公告)日：2006-03-14
申请号：US09991039
申请日：2001-11-21
IPC分类号： H04J11/00
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0021 , H04L1/0023 , H04L1/1819 , H04L5/0007 , H04L5/0046 , Y02D50/10
摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.
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公开(公告)号：US08644170B2
公开(公告)日：2014-02-04
申请号：US11297853
申请日：2005-12-08
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0021 , H04L1/0023 , H04L1/1819 , H04L5/0007 , H04L5/0046 , Y02D50/10
摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.
摘要翻译： 确定OFDM系统中数据传输速率的技术。 基于等效（平坦）信道的度量来确定由OFDM系统在给定的多路径（非平坦）信道上可靠地发送的最大数据速率。 对于给定的多径信道和特定速率（其可以指示特定数据速率，调制方案和编码率），度量最初从等效数据速率和特定调制方案导出。 然后确定使用特定调制方案和编码速率可靠地发送特定数据速率所需的阈值SNR。 如果度量大于或等于阈值SNR，则特定速率被认为是由多径信道支持的。 增量传输用于解决确定的数据速率中的错误。
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公开(公告)号：US08254977B2
公开(公告)日：2012-08-28
申请号：US11441651
申请日：2006-05-25
CPC分类号： H04W52/343 , H04W52/367
摘要： A novel MAC algorithm is disclosed having various features for a modern CDMA interference-shared reverse link, including (a) link quality assurance, (b) individual congestion control, (c) variable data rate transition policy, and/or (d) reverse link partitioning. Link quality assurance is provided by monitoring transmission feedback information (ACK/NACK) to indirectly determine the quality of a communication link. Wireless devices are individually targeted to perform congestion control of the reverse link. Variable data transmission rates and discontinuous transmissions are achieved by individual wireless devices that autonomously adjust their transmission rate and transmit power. The reverse link can also be partitioned among the different wireless devices by individually controlling the transmit power of the wireless devices operating on the reverse link.
摘要翻译： 公开了一种新颖的MAC算法，其具有用于现代CDMA干扰共享反向链路的各种特征，包括（a）链路质量保证，（b）个体拥塞控制，（c）可变数据速率转换策略和/或（d）反向 链接分区。 通过监视传输反馈信息（ACK / NACK）来间接地确定通信链路的质量来提供链路质量保证。 无线设备被单独定向以执行反向链路的拥塞控制。 可变数据传输速率和不连续传输通过自主调整其传输速率和传输功率的各个无线设备实现。 也可以通过单独控制在反向链路上操作的无线设备的发射功率，在不同的无线设备之间对反向链路进行分区。
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公开(公告)号：US07020073B2
公开(公告)日：2006-03-28
申请号：US10086838
申请日：2002-02-28
IPC分类号： H04J11/00
CPC分类号： H04L5/006 , H04L1/0002 , H04L1/0021 , H04L1/0023 , H04L1/1819 , H04L5/0007 , H04L5/0046 , Y02D50/10
摘要： Techniques to determine the rate for a data transmission in an OFDM system. The maximum data rate that may be reliably transmitted over a given multipath (non-flat) channel by the OFDM system is determined based on a metric for an equivalent (flat) channel. For the given multipath channel and a particular rate (which may be indicative of a particular data rate, modulation scheme, and coding rate), the metric is initially derived from an equivalent data rate and the particular modulation scheme. A threshold SNR needed to reliably transmit the particular data rate using the particular modulation scheme and coding rate is then determined. The particular rate is deemed as being supported by the multipath channel if the metric is greater than or equal to the threshold SNR. Incremental transmission is used to account for errors in the determined data rate.
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公开(公告)号：US07450541B2
公开(公告)日：2008-11-11
申请号：US10952970
申请日：2004-09-28
CPC分类号： H04W56/0005 , H04J13/16
摘要： Systems, methods and apparatus for configuring and accessing a random access channel in a CDMA communication system are disclosed. The number of users supported by a random access channel can be optimized by assigning a distinct time of arrival to each of a plurality of users. Each of the users can be time synchronized and can transmit data at a time that compensates for a propagation delay to allow the data to arrive at the destination receiver at the assigned time. In a CDMA system, each of the users can transmit data that is spread with the same spreading code, provided the cross correlation properties of the code are sufficient to allow identification of a source that is time offset relative to another user. The time of arrival can be determined based on the number of active users, and can be assigned as often as each transmission by each user.
摘要翻译： 公开了用于在CDMA通信系统中配置和访问随机接入信道的系统，方法和装置。 可以通过向多个用户中的每一个分配不同的到达时间来优化随机接入信道支持的用户数量。 每个用户可以是时间同步的，并且可以在补偿传播延迟的时间发送数据，以允许数据在分配的时间到达目的地接收机。 在CDMA系统中，如果代码的互相关属性足以允许识别相对于另一个用户的时间偏移的源，那么每个用户可以发送用相同的扩展码扩展的数据。 可以基于活动用户的数量来确定到达时间，并且可以分配给每个用户每次发送的频率。
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9.发明申请公开(公告)号：US20120200458A1
公开(公告)日：2012-08-09
申请号：US13168623
申请日：2011-06-24
IPC分类号： H01Q3/00
CPC分类号： H04W52/241 , H01Q1/2291 , H01Q1/246 , H01Q1/28 , H01Q3/24 , H01Q3/26 , H01Q13/02 , H01Q21/062 , H01Q21/205 , H01Q25/00 , H04B7/18506 , H04W84/005
摘要： A ground station antenna array includes a first array of antenna elements. A second array of antenna elements are vertically aligned with the first array of antenna elements. The first array of antenna elements and the second array of antenna elements are coupled to the digital beam forming circuitry and each cover a same sector of azimuth; the first array of antenna elements only covering a first elevation; the second array of antenna elements only covering a second lower elevation. The digital beam forming circuitry directs a radiation pattern of the first array of antenna elements in a first range of elevation angles, and directs a radiation pattern of the second array of antenna elements in a second range of elevation angles. The second array of antenna elements has higher gain than the first array. A respective transceiver is coupled to respective antenna elements of the first and second arrays.
摘要翻译： 地面站天线阵列包括天线元件的第一阵列。 天线元件的第二阵列与天线元件的第一阵列垂直对准。 天线元件的第一阵列和第二天线元件阵列耦合到数字波束形成电路，并且每个覆盖相同的方位角; 天线元件的第一阵列仅覆盖第一高度; 天线元件的第二阵列仅覆盖第二较低高度。 数字波束形成电路在第一仰角范围内引导天线元件的第一阵列的辐射图案，并且在第二仰角范围内引导天线元件的第二阵列的辐射图。 天线元件的第二阵列具有比第一阵列更高的增益。 相应的收发器耦合到第一和第二阵列的相应天线元件。
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公开(公告)号：US09295006B2
公开(公告)日：2016-03-22
申请号：US13168617
申请日：2011-06-24
IPC分类号： H04M1/00 , H04B15/00 , H04B7/00 , H04W52/24 , H01Q1/22 , H01Q1/24 , H01Q1/28 , H01Q3/24 , H01Q3/26 , H01Q13/02 , H01Q21/06 , H01Q21/20 , H01Q25/00 , H04B7/185 , H04W84/00
CPC分类号： H04W52/241 , H01Q1/2291 , H01Q1/246 , H01Q1/28 , H01Q3/24 , H01Q3/26 , H01Q13/02 , H01Q21/062 , H01Q21/205 , H01Q25/00 , H04B7/18506 , H04W84/005
摘要： A method for real-time calibration of an air to ground two-way communication system. The method includes calibrating a ground base station antenna array according to forward link calibration coefficients received from an aircraft as part of a communication signaling protocol during operation of the air to ground two-way communication system. The method may also includes communicating between the ground base station antenna array and the aircraft over a narrow beam.
摘要翻译： 一种空对地双向通信系统的实时校准方法。 该方法包括在空对地双向通信系统的操作期间，根据从飞机接收的前向链路校准系数校准地面基站天线阵列作为通信信令协议的一部分。 该方法还可以包括在窄波束上的地面基站天线阵列和飞行器之间的通信。
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