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1. 发明授权

US08676144B2 Adaptive interference nulling for MIMO receiver based on interference characteristics 有权
标题翻译：基于干扰特性的MIMO接收机的自适应干扰归零
公开(公告)号：US08676144B2
公开(公告)日：2014-03-18
申请号：US13086643
申请日：2011-04-14
申请人： Li Guo , Hang Jin , Paul J. Stager , Neil R. Diener , Matthew A. Silverman , Chandra Vaidyanathan
发明人： Li Guo , Hang Jin , Paul J. Stager , Neil R. Diener , Matthew A. Silverman , Chandra Vaidyanathan
IPC分类号： H04B1/10
CPC分类号： H04B7/0865 , H04B17/345
摘要： Interference in an unlicensed frequency band is spatially filtered out from received signals at a wireless device operating in the unlicensed frequency band. Energy received at a plurality of antennas of the wireless is device is analyzed to detect interference in the unlicensed frequency band. The detected interference is classified by type. Parameters for a nulling filter are generated or selected based on the type of interference detected in the received energy. During a time interval when it is expected to receive desired signals, the nulling filter is applied using the parameters to signals obtained from energy received at the plurality of antennas during the time interval.
摘要翻译：未经授权的频带中的干扰在从未接收的频带中工作的无线设备的接收信号中被空间滤除。对在无线的多个天线处接收的能量进行分析，以检测未许可频带中的干扰。检测到的干扰按类型分类。基于在接收能量中检测到的干扰类型来生成或选择归零滤波器的参数。在预期接收期望信号的时间间隔期间，使用参数将归零滤波器应用于在时间间隔期间从在多个天线接收的能量获得的信号。

2. 发明申请

US20090296848A1 JOINT MAXIMAL RATIO COMBINING USING TIME-DOMAUIN BASED SIGNAL PROCESSING 审中-公开
标题翻译：使用基于时间信号的信号处理联合最大比率组合
公开(公告)号：US20090296848A1
公开(公告)日：2009-12-03
申请号：US12538446
申请日：2009-08-10
申请人： Yohannes Tesfai , Chandra Vaidyanathan , Gary L. Sugar
发明人： Yohannes Tesfai , Chandra Vaidyanathan , Gary L. Sugar
IPC分类号： H03K5/159 , H04B7/02
CPC分类号： H04B7/0413 , H04B7/0615 , H04B7/0669 , H04B7/0671 , H04B7/0845 , H04B7/0854 , H04B7/0857 , H04L1/06 , H04L25/0204 , H04L27/2601 , H04L2025/03445 , H04W52/42
摘要： A communication device transmits and receives communication signals with another communication device via a plurality of antennas, a plurality of transmit tapped delay-line filters, a plurality of receive tapped delay-line filters, a combiner/analyzer with a plurality of filters for signal processing; and a plurality of computation blocks. The computation blocks determine complex weights for the tapped delay-line filters for optimizing the received signal-to-noise ratio and the range of communication of the communication device.
摘要翻译：通信设备经由多个天线，多个发射抽头延迟线滤波器，多个接收抽头延迟线滤波器，具有多个用于信号处理的滤波器的组合器/分析器来发送和接收与另一通信设备的通信信号 ; 和多个计算块。计算块确定用于优化接收到的信噪比和通信设备的通信范围的抽头延迟线滤波器的复权重。

3. 发明申请

US20080095260A1 Compensation techniques for group delay effects in transmit beamforming radio communication 审中-公开
标题翻译：发射波束成形无线电通信中群延迟效应的补偿技术
公开(公告)号：US20080095260A1
公开(公告)日：2008-04-24
申请号：US12001310
申请日：2007-12-11
申请人： Chandra Vaidyanathan
发明人： Chandra Vaidyanathan
IPC分类号： H04B7/04 , H04B1/38
CPC分类号： H04B7/043 , H04B7/0434 , H04B7/0443 , H04B7/0465 , H04B7/0617
摘要： In a wireless communication device, transmit weights are iteratively processed to compensate for any group delay caused by receive synchronization in the receive device. A transmit matrix of weights is computed from signals transmitted by a second communication device and received at a plurality of antennas of the first communication device. The transmit matrix processing includes normalizing a transmit weight vector with respect to a mode of the transmit weight associated with one of the plurality of antennas.
摘要翻译：在无线通信设备中，迭代地处理发送权重以补偿由接收设备中的接收同步引起的任何组延迟。由第二通信设备发送的信号并在第一通信设备的多个天线处接收的信号来计算加权的发送矩阵。发射矩阵处理包括相对于与多个天线之一相关联的发射权重的模式归一化发射权重向量。

4. 发明授权

US07308287B2 Compensation techniques for group delay effects in transmit beamforming radio communication 失效
标题翻译：发射波束成形无线电通信中群延迟效应的补偿技术
公开(公告)号：US07308287B2
公开(公告)日：2007-12-11
申请号：US11487242
申请日：2006-07-14
申请人： Chandra Vaidyanathan
发明人： Chandra Vaidyanathan
IPC分类号： H04M1/00
CPC分类号： H04B7/043 , H04B7/0434 , H04B7/0443 , H04B7/0465 , H04B7/0617
摘要： In a wireless communication device, transmit weights are iteratively processed to compensate for any group delay caused by receive synchronization in the receive device. A transmit matrix of weights is computed from signals transmitted by a second communication device and received at a plurality of antennas of the first communication device. The transmit matrix processing includes normalizing a transmit weight vector with respect to a mode of the transmit weight associated with one of the plurality of antennas. The processed transmit matrix is then applied to a transmit signal to produce a plurality of transmit signals to be simultaneously transmitted from corresponding ones of the plurality of antennas of the first communication device. A plurality of eigenmodes is transmitted accordingly between the two devices in a converging iteration.
摘要翻译：在无线通信设备中，迭代地处理发送权重以补偿由接收设备中的接收同步引起的任何组延迟。由第二通信设备发送的信号并在第一通信设备的多个天线处接收的信号来计算加权的发送矩阵。发射矩阵处理包括相对于与多个天线之一相关联的发射权重的模式归一化发射权重向量。然后将经处理的发射矩阵应用于发射信号以产生要从第一通信设备的多个天线中的相应天线同时发射的多个发射信号。在聚合迭代中，相应地在两个设备之间传输多个本征模。

5. 发明授权

US07099678B2 System and method for transmit weight computation for vector beamforming radio communication 有权
标题翻译：用于矢量波束成形无线电通信的发射权重计算系统和方法
公开(公告)号：US07099678B2
公开(公告)日：2006-08-29
申请号：US10779268
申请日：2004-02-13
申请人： Chandra Vaidyanathan
发明人： Chandra Vaidyanathan
IPC分类号： H04B1/00 , H04B7/00
CPC分类号： H04B7/0413 , H04B7/0443 , H04B7/0465 , H04B7/0615 , H04L1/0002 , H04L1/0026
摘要： A system and method for vector wireless radio communication (multiple modes or signal streams) between a first communication device and a second communication device using radio frequency (RF) communication techniques. At each communication device, signals are received at a plurality of antennas representing a plurality of modes simultaneously transmitted by the other communication device, wherein each mode is a signal stream. A transmit matrix is computed from signals received at the plurality of antennas. The transmit matrix distributes a plurality of modes among a plurality of antenna paths each associated with a corresponding one of the plurality of antennas of the first communication device, and is applied to the plurality of modes to be simultaneously transmitted from the plurality of antennas of one communication device to the other communication device.
摘要翻译：一种使用射频（RF）通信技术的第一通信设备和第二通信设备之间的矢量无线电通信（多种模式或信号流）的系统和方法。在每个通信设备处，在表示由另一通信设备同时发送的多个模式的多个天线处接收信号，其中每个模式是信号流。从在多个天线处接收的信号计算发送矩阵。所述发送矩阵在多个天线路径中分配多个模式，所述多个天线路径与所述第一通信设备的所述多个天线中的对应的天线相关联，并且被应用于从所述多个天线中的一个天线同时发送的多个模式通信设备到另一个通信设备。

6. 发明申请

US20060116087A1 Control of power amplifiers in devices using transmit beamforming 有权
公开(公告)号：US20060116087A1
公开(公告)日：2006-06-01
申请号：US11326630
申请日：2006-01-06
申请人： Gary Sugar , Chandra Vaidyanathan , Sifen Luo
发明人： Gary Sugar , Chandra Vaidyanathan , Sifen Luo
IPC分类号： H04B1/04 , H04B1/02
CPC分类号： H04W52/42 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0845 , H04B7/0857 , H04L27/2601
摘要： A transmitter comprises a plurality of transmit antennas for simultaneously transmitting weighted signals according to a channel transfer function. Each antenna has a corresponding amplifier that is bias controlled according to the transmit weights derived for the antenna transmission. A baseband processor produces digital weighted signals for upconversion and amplification by the amplifiers. Each amplifier is accompanied by a bias circuit responsive to the transmit weights. Alternatively, or additionally, corresponding DC/DC converters are used to control the operating voltage of the amplifiers.

7. 发明授权

US06871049B2 Improving the efficiency of power amplifiers in devices using transmit beamforming 有权
标题翻译：提高使用发射波束成形的设备中功率放大器的效率
公开(公告)号：US06871049B2
公开(公告)日：2005-03-22
申请号：US10249063
申请日：2003-03-13
申请人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
发明人： Gary L. Sugar , Chandra Vaidyanathan , Sifen Luo
IPC分类号： H01Q3/28 , H03G3/30 , H04B1/04 , H04B7/005 , H04B7/06 , H04B7/08 , H04L27/26 , H04B1/02 , H04Q11/12
CPC分类号： H04W52/42 , H01Q3/28 , H03G3/3042 , H03G3/3089 , H04B1/0483 , H04B7/0615 , H04B7/0617 , H04B7/0669 , H04B7/0845 , H04B7/0857 , H04L27/2601
摘要： Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, the power of each amplified signal output by the power amplifiers may not be the same for all the power amplifiers, and may vary with changes in the communication channel between the transmitting device and receiving device. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. By adjusting one or more operating parameters of each power amplifier according to changing requirements (e.g., the destination device and channel conditions), the efficiency of each power amplifier can be optimized. Consequently, one or more of the power amplifiers are operated with one or more operating parameters that reflects the output power actually needed for the corresponding radio frequency signal to be transmitted.
摘要翻译：用于优化多个功率放大器中的每一个功率放大器的效率的系统和方法，其放大多个射频信号中的相应一个，用于由多个天线中的相应一个发射。使用发射波束形成，由功率放大器输出的每个放大信号的功率对于所有功率放大器可能不相同，并且可以随着发射装置和接收装置之间的通信信道的变化而变化。多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。通过根据变化的要求（例如，目的地设备和信道条件）调整每个功率放大器的一个或多个操作参数，可以优化每个功率放大器的效率。因此，一个或多个功率放大器通过一个或多个反映要发射的相应射频信号实际需要的输出功率的工作参数来操作。

8. 发明申请

US20120264388A1 Adaptive Interference Nulling for MIMO Receiver Based on Interference Characteristics 有权
标题翻译：基于干扰特性的MIMO接收机的自适应干扰消除
公开(公告)号：US20120264388A1
公开(公告)日：2012-10-18
申请号：US13086643
申请日：2011-04-14
申请人： Li Guo , Hang Jin , Paul J. Stager , Neil R. Diener , Matthew A. Silverman , Chandra Vaidyanathan
发明人： Li Guo , Hang Jin , Paul J. Stager , Neil R. Diener , Matthew A. Silverman , Chandra Vaidyanathan
IPC分类号： H04B1/10
CPC分类号： H04B7/0865 , H04B17/345
摘要： Interference in an unlicensed frequency band is spatially filtered out from received signals at a wireless device operating in the unlicensed frequency band. Energy received at a plurality of antennas of the wireless is device is analyzed to detect interference in the unlicensed frequency band. The detected interference is classified by type. Parameters for a nulling filter are generated or selected based on the type of interference detected in the received energy. During a time interval when it is expected to receive desired signals, the nulling filter is applied using the parameters to signals obtained from energy received at the plurality of antennas during the time interval.
摘要翻译：未经授权的频带中的干扰在从未接收的频带中工作的无线设备的接收信号中被空间滤除。对在无线的多个天线处接收的能量进行分析，以检测未许可频带中的干扰。检测到的干扰按类型分类。基于在接收能量中检测到的干扰类型来生成或选择归零滤波器的参数。在预期接收期望信号的时间间隔期间，使用参数将归零滤波器应用于在时间间隔期间从在多个天线接收的能量获得的信号。

9. 发明授权

US08179816B1 System and method for high resolution indoor positioning using a narrowband RF transceiver 失效
标题翻译：使用窄带RF收发器进行高分辨率室内定位的系统和方法
公开(公告)号：US08179816B1
公开(公告)日：2012-05-15
申请号：US13286649
申请日：2011-11-01
申请人： Chandra Vaidyanathan , Gary L Sugar , Yohannes Tesfai
发明人： Chandra Vaidyanathan , Gary L Sugar , Yohannes Tesfai
IPC分类号： H04L1/00 , H04L12/26 , H04J4/00
CPC分类号： G01S1/20 , G01S1/024 , G01S5/021 , G01S5/0226 , G01S5/14 , H04B1/69 , H04W64/00
摘要： A sequence of two or more signals representing two or more data packets is transmitted through a wireless channel using a transmitter device. The two or more signals are a result of two or more transmissions that are made sequentially in time at different center frequencies in order to span a desired bandwidth. At least one of the two or more signals includes a physical layer preamble. The sequence of two or more signals is received using a receiver device. A time of arrival of one or more signals of the received sequence is calculated using one or more of the received sequence, the time differences among the two or more transmissions, the different center frequencies, information from the two or more data packets, and any carrier phase differences among the two or more transmissions using the receiver device.
摘要翻译：通过使用发射机设备的无线信道来发送表示两个或更多个数据分组的两个或更多个信号的序列。两个或更多个信号是在不同的中心频率上按时间顺序进行的两个或多个传输的结果，以便跨越期望的带宽。两个或更多个信号中的至少一个包括物理层前导码。使用接收器装置接收两个或更多个信号的序列。使用所接收的序列中的一个或多个，两个或多个传输之间的时间差，不同的中心频率，来自两个或多个数据分组的信息，以及任何使用接收机设备的两个或更多个传输之间的载波相位差。

10. 发明授权

US08111783B2 Capturing and using radio events 有权
标题翻译：捕获和使用无线电活动
公开(公告)号：US08111783B2
公开(公告)日：2012-02-07
申请号：US12140707
申请日：2008-06-17
申请人： David Kloper , Yohannes Tesfai , Chandra Vaidyanathan
发明人： David Kloper , Yohannes Tesfai , Chandra Vaidyanathan
IPC分类号： H03K9/00 , H04L27/00
CPC分类号： H04B17/318 , G01S7/021 , H04L7/04
摘要： In one embodiment a method includes, collecting in-phase/quadrature (I/Q) data representing energy detected by a radio in a frequency band, performing a fast Fourier transform (FFT) on the I/Q data resulting in a stream of FFT blocks, identifying using the stream of FFT blocks a pulse in the frequency band, recording in a radio events record (RER) a plurality of radio events and corresponding timestamps that are indicative, respectively, of a type and time of individual state changes in the radio during the collecting step, and, for example, using at least two of the radio events to identify, in the time domain, a beginning time and end time of the pulse detected in the stream of FFT blocks.
摘要翻译：在一个实施例中，一种方法包括：收集表示在频带中由无线电装置检测到的能量的同相/正交（I / Q）数据，对I / Q数据执行快速傅里叶变换（FFT），得到FFT流块，使用FFT流来识别在频带中的脉冲，记录在无线电事件记录（RER）中的多个无线电事件和对应的时间戳，分别指示各个状态变化的类型和时间在收集步骤期间，例如，使用至少两个无线电事件在时域中识别在FFT块流中检测到的脉冲的开始时间和结束时间。

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