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1.发明授权Integrated circuit implementation of methods and apparatuses for monitoring occupancy of wideband GHz spectrum, and sensing respective frequency components of time-varying signals using sub-nyquist criterion signal sampling 有权用于监视宽带GHz频谱占用的方法和装置的集成电路实现，以及使用次奎斯特准则信号采样来感测时变信号的各个频率分量公开(公告)号：US09313072B2
公开(公告)日：2016-04-12
申请号：US14548238
申请日：2014-11-19
申请人： Dina Katabi , Omid Salehi-Abari , Ezzeldin Hamed , Haitham Z. Al-Hassanieh , Lixin Shi , Abhinav Agarwal , Anantha Chandrakasan , Vladimir Stojanovic
发明人： Dina Katabi , Omid Salehi-Abari , Ezzeldin Hamed , Haitham Z. Al-Hassanieh , Lixin Shi , Abhinav Agarwal , Anantha Chandrakasan , Vladimir Stojanovic
CPC分类号： H04L25/024 , G01P3/489 , H04B1/16 , H04B1/40 , H04L25/03038 , H04L27/0006 , H04L27/263 , H04L27/265 , H04L27/2666 , H04W16/14
摘要： An ASIC for monitoring wideband GHz spectrum to sense respective frequency components present in the spectrum. The ASIC implements Fast Fourier Transform (FFT) techniques to facilitate identification of one or more frequency components of a sparse signal after the signal is sub-sampled at a rate below the Nyquist criterion. The ASIC computes a first Fast Fourier Transform (FFT) of a first sub-sampled set of samples of a time-varying signal representing the monitored spectrum and sampled at a first sampling rate, and further computes a second FFT of a second sub-sampled set of samples of the time-varying signal sampled at a second sampling rate different from the first sampling rate. In one example, each of the first FFT and the second FFT is a low-radix FFT to facilitate a low-power and low-cost ASIC implementation of wideband spectrum sensing.
摘要翻译： 用于监测宽带GHz频谱以检测频谱中存在的相应频率分量的ASIC。 在以低于奈奎斯特准则的速率对信号进行子采样之后，ASIC实现快速傅立叶变换（FFT）技术以便于识别稀疏信号的一个或多个频率分量。 ASIC计算表示所监视的频谱并以第一采样率采样的时变信号的第一子采样采样集合的第一快速傅立叶变换（FFT），并且还计算第二次采样的第二FFT 以与第一采样率不同的第二采样率采样的时变信号的采样集合。 在一个示例中，第一FFT和第二FFT中的每一个是低基FFT，以促进宽带频谱感测的低功率和低成本ASIC实施。
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2.发明申请INTEGRATED CIRCUIT IMPLEMENTATION OF METHODS AND APPARATUSES FOR MONITORING OCCUPANCY OF WIDEBAND GHz SPECTRUM, AND SENSING RESPECTIVE FREQUENCY COMPONENTS OF TIME-VARYING SIGNALS USING SUB-NYQUIST CRITERION SIGNAL SAMPLING 有权用于监视宽带GHz频谱的方法和装置的集成电路实现，以及使用次NYQUIST标准信号采样的时变信号的感测频率分量的感测公开(公告)号：US20150146826A1
公开(公告)日：2015-05-28
申请号：US14548238
申请日：2014-11-19
申请人： Dina Katabi , Omid Salehi-Abari , Ezzeldin Hamed , Haitham Z. Al-Hassanieh , Lixin Shi , Abhinav Agarwal , Anantha Chandrakasan , Vladimir Stojanovic
发明人： Dina Katabi , Omid Salehi-Abari , Ezzeldin Hamed , Haitham Z. Al-Hassanieh , Lixin Shi , Abhinav Agarwal , Anantha Chandrakasan , Vladimir Stojanovic
IPC分类号： H04L27/26
CPC分类号： H04L25/024 , G01P3/489 , H04B1/16 , H04B1/40 , H04L25/03038 , H04L27/0006 , H04L27/263 , H04L27/265 , H04L27/2666 , H04W16/14
摘要： An ASIC for monitoring wideband GHz spectrum to sense respective frequency components present in the spectrum. The ASIC implements Fast Fourier Transform (FFT) techniques to facilitate identification of one or more frequency components of a sparse signal after the signal is sub-sampled at a rate below the Nyquist criterion. The ASIC computes a first Fast Fourier Transform (FFT) of a first sub-sampled set of samples of a time-varying signal representing the monitored spectrum and sampled at a first sampling rate, and further computes a second FFT of a second sub-sampled set of samples of the time-varying signal sampled at a second sampling rate different from the first sampling rate. In one example, each of the first FFT and the second FFT is a low-radix FFT to facilitate a low-power and low-cost ASIC implementation of wideband spectrum sensing.
摘要翻译： 用于监测宽带GHz频谱以检测频谱中存在的相应频率分量的ASIC。 在以低于奈奎斯特准则的速率对信号进行子采样之后，ASIC实现快速傅立叶变换（FFT）技术以便于识别稀疏信号的一个或多个频率分量。 ASIC计算表示所监视的频谱并以第一采样率采样的时变信号的第一子采样采样集合的第一快速傅立叶变换（FFT），并且还计算第二次采样的第二FFT 以与第一采样率不同的第二采样率采样的时变信号的采样集合。 在一个示例中，第一FFT和第二FFT中的每一个是低基FFT，以促进宽带频谱感测的低功率和低成本ASIC实施。
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3.发明授权Methods and apparatus for monitoring occupancy of wideband GHz spectrum and sensing and decoding respective frequency components of time-varying signals using sub-nyquist criterion signal sampling 有权用于监视宽带GHz频谱的占用的方法和装置，并且使用次尼基准则信号采样来感测和解码时变信号的各个频率分量公开(公告)号：US09544167B2
公开(公告)日：2017-01-10
申请号：US14548231
申请日：2014-11-19
CPC分类号： H04L25/024 , G01P3/489 , H04B1/16 , H04B1/40 , H04L25/03038 , H04L27/0006 , H04L27/263 , H04L27/265 , H04L27/2666 , H04W16/14
摘要： Methods and apparatus for monitoring wideband GHz spectrum for wireless communication, and sensing and decoding respective frequency components of a time-varying signal corresponding to the monitored spectrum. Concepts relating to sparse Fast Fourier Transform (sFFT) techniques facilitate identification of one or more frequency components of a sparsely occupied spectrum by sub-sampling the signal corresponding to the monitored spectrum at a sampling rate below the Nyquist criterion. The disclosed methods and apparatus may be implemented using conventional relatively low-power wireless receivers and using off-the-shelf relatively inexpensive low-speed and low-power analog-to-digital converters (ADCs) typically employed in WiFi devices or cellular phones, in tandem with unique processing techniques based on sFFTs and sub-Nyquist criterion sampling, and have demonstrated efficacy even in scenarios where the monitored spectrum is not sparse.
摘要翻译： 用于监测用于无线通信的宽带GHz频谱的方法和装置，以及感测和解码对应于所监视的频谱的时变信号的各个频率分量。 与稀疏快速傅立叶变换（sFFT）技术有关的概念通过以低于奈奎斯特准则的采样率对与监测光谱相对应的信号进行子采样，从而有助于识别稀疏占用频谱的一个或多个频率分量。 所公开的方法和装置可以使用传统的相对低功率的无线接收机来实现，并且使用通常在WiFi设备或蜂窝电话中使用的现成的相对便宜的低速和低功率模数转换器（ADC） 与基于sFFT和亚奈奎斯特准则抽样的独特处理技术相结合，并且即使在监测频谱不稀疏的情况下也已经证明了效果。
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4.发明申请METHODS AND APPARATUS FOR MONITORING OCCUPANCY OF WIDEBAND GHz SPECTRUM AND SENSING AND DECODING RESPECTIVE FREQUENCY COMPONENTS OF TIME-VARYING SIGNALS USING SUB-NYQUIST CRITERION SIGNAL SAMPLING 有权用于监测宽带GHz频谱和传感的方法和装置，并使用次NYQUIST标准信号采样来解码时变信号的相关频率分量公开(公告)号：US20160285650A1
公开(公告)日：2016-09-29
申请号：US14548231
申请日：2014-11-19
CPC分类号： H04L25/024 , G01P3/489 , H04B1/16 , H04B1/40 , H04L25/03038 , H04L27/0006 , H04L27/263 , H04L27/265 , H04L27/2666 , H04W16/14
摘要： Methods and apparatus for monitoring wideband GHz spectrum for wireless communication, and sensing and decoding respective frequency components of a time-varying signal corresponding to the monitored spectrum. Concepts relating to sparse Fast Fourier Transform (sFFT) techniques facilitate identification of one or more frequency components of a sparsely occupied spectrum by sub-sampling the signal corresponding to the monitored spectrum at a sampling rate below the Nyquist criterion. The disclosed methods and apparatus may be implemented using conventional relatively low-power wireless receivers and using off-the-shelf relatively inexpensive low-speed and low-power analog-to-digital converters (ADCs) typically employed in WiFi devices or cellular phones, in tandem with unique processing techniques based on sFFTs and sub-Nyquist criterion sampling, and have demonstrated efficacy even in scenarios where the monitored spectrum is not sparse.
摘要翻译： 用于监测用于无线通信的宽带GHz频谱的方法和装置，以及感测和解码对应于所监视的频谱的时变信号的各个频率分量。 与稀疏快速傅立叶变换（sFFT）技术有关的概念通过以低于奈奎斯特准则的采样率对与监测光谱相对应的信号进行子采样，从而有助于识别稀疏占用频谱的一个或多个频率分量。 所公开的方法和装置可以使用传统的相对低功率的无线接收机来实现，并且使用通常在WiFi设备或蜂窝电话中使用的现成的相对便宜的低速和低功率模数转换器（ADC） 与基于sFFT和亚奈奎斯特准则抽样的独特处理技术相结合，并且即使在监测频谱不稀疏的情况下也已经证明了效果。
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公开(公告)号：US20130064114A1
公开(公告)日：2013-03-14
申请号：US13562907
申请日：2012-07-31
申请人： Shyamnath Gollakota , Dina Katabi , Ching-Ju Lin
发明人： Shyamnath Gollakota , Dina Katabi , Ching-Ju Lin
IPC分类号： H04W24/00
CPC分类号： H04B7/0452 , H04B5/0018 , H04L1/0002 , H04L27/0006
摘要： A number of techniques, which may be used together, provide distributed coordination of multiple stations so that concurrent transmissions and increased throughput are achieved on a shared radio medium. Each of the techniques provides a separate innovation that can be used alone or in combination with one or more of the other techniques.
摘要翻译： 可以一起使用的多种技术提供多个站的分布式协调，使得在共享无线电介质上实现并发传输和增加的吞吐量。 每种技术提供了可以单独使用或与一种或多种其它技术组合使用的单独的创新。
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公开(公告)号：US09268025B2
公开(公告)日：2016-02-23
申请号：US13570771
申请日：2012-08-09
IPC分类号： G01S19/30 , G01S19/37 , H04B1/709 , H04B1/7105 , H04N19/60
CPC分类号： G01S19/30 , G01S19/37 , H04B1/709 , H04B1/71052 , H04N19/60
摘要： An offset estimator (e.g., a time delay, a spatial image offset, etc.) makes use of a transform approach (e.g., using Fast Fourier Transforms). The sparse nature of a cross-correlation is exploited by limiting the computation required in either or both of the forward and inverse transforms. For example, only a subset of the transform values (e.g., a regular subsampling of the values) is used. In some examples, an inverse transform yields a time aliased version of the cross-correlation. Further processing then identifies the most likely offset of the original signals by considering offsets that are consistent with the aliased output.
摘要翻译： 偏移估计器（例如，时间延迟，空间图像偏移等）利用变换方法（例如，使用快速傅里叶变换）。 通过限制正向和反向变换中的任一个或两者所需的计算来利用互相关的稀疏性质。 例如，仅使用变换值的子集（例如，值的常规二次抽样）。 在一些示例中，逆变换产生互相关的时间混叠版本。 然后，进一步的处理通过考虑与混叠输出一致的偏移来识别原始信号的最可能的偏移。
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公开(公告)号：US20130028305A1
公开(公告)日：2013-01-31
申请号：US13562872
申请日：2012-07-31
CPC分类号： H04B7/0848 , H04J11/0023
摘要： In one aspect, a method for mitigating an effect of an interfering radio signal at a multiple antenna receiver includes forming an estimate of a relationship of the interfering signal among signals received from the multiple antennas. In general, the interfering signal does not share the same communication technology as a desired signal. The signals received from the multiple antennas filtered and combined according to the estimate of the relationship of the interfering channels to reduce an effect of the interfering signal. Desired data present in the desired signal represented in the filtered and combined signals is decoded and the estimate of the relationship of the interfering signals is updated according to the decoding of the desired signal.
摘要翻译： 一方面，减轻多天线接收机干扰无线电信号的影响的方法包括形成从多个天线接收的信号之间的干扰信号的关系的估计。 通常，干扰信号不会与所需信号共享相同的通信技术。 根据干扰信道关系的估计，从多个天线接收的信号被滤波和组合，以减少干扰信号的影响。 在滤波和组合信号中表示的期望信号中存在的期望数据被解码，并且根据期望信号的解码来更新干扰信号的关系的估计。
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公开(公告)号：US09225402B2
公开(公告)日：2015-12-29
申请号：US13562907
申请日：2012-07-31
申请人： Shyamnath Gollakota , Dina Katabi , Ching-Ju Lin
发明人： Shyamnath Gollakota , Dina Katabi , Ching-Ju Lin
CPC分类号： H04B7/0452 , H04B5/0018 , H04L1/0002 , H04L27/0006
摘要： A number of techniques, which may be used together, provide distributed coordination of multiple stations so that concurrent transmissions and increased throughput are achieved on a shared radio medium. Each of the techniques provides a separate innovation that can be used alone or in combination with one or more of the other techniques.
摘要翻译： 可以一起使用的多种技术提供多个站的分布式协调，使得在共享无线电介质上实现并发传输和增加的吞吐量。 每种技术提供了可以单独使用或与一种或多种其它技术组合使用的单独的创新。
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公开(公告)号：US09031180B2
公开(公告)日：2015-05-12
申请号：US13646176
申请日：2012-10-05
CPC分类号： H04L27/2657 , H04L25/0204 , H04L27/2634 , H04L27/2691 , H04L27/2695
摘要： In one aspect, a distributed coherent transmission system enables transmissions from separate wireless transmitters with independent frequency or clock references to emulate a system where all the transmitters share a common frequency or clock reference. Differences in frequency and/or phase between transmitters are addressed by suitably precoding signals before modulation at one or more of the transmitters based on a synchronizing transmission from one of the transmitters (e.g., a master transmitter) received at a corresponding receiver sharing the frequency or clock reference with each of the one or more transmitters. Such a distributed coherent transmission system can allow N single-antenna transmitters with independent frequency or clock references to emulate a single N-antenna Multi Input Multi Output (MIMO) transmitter, or implement schemes such as distributed superposition coding or lattice codes that require coherence across separate transmitters.
摘要翻译： 在一个方面，分布式相干传输系统使得具有独立频率或时钟参考的单独无线发射机的传输能够模拟所有发射机共享公共频率或时钟参考的系统。 在发射机之间的频率和/或相位的差异通过在一个或多个发射机的调制之前基于来自共享频率的对应接收机之间接收的发射机（例如，主发射机）之一的同步传输来适当地预编码信号来解决，或者 每个一个或多个发射机的时钟参考。 这种分布式相干传输系统可以允许具有独立频率或时钟参考的N个单天线发射机模拟单个N天线多输入多输出（MIMO）发射机，或实现诸如分布式叠加编码或需要相干性的网格码的方案 单独的发射机。
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10.发明申请COHERENT TRANSMISSION FROM DISTRIBUTED WIRELESS TRANSMITTERS USING LEGACY RECEIVERS 有权分布式无线发射机使用接收方的相关传输公开(公告)号：US20140003338A1
公开(公告)日：2014-01-02
申请号：US13646068
申请日：2012-10-05
IPC分类号： H04W24/00
CPC分类号： H04B7/024 , H04B7/0691 , H04L25/0204
摘要： A distributed wireless communication system includes multiple access points, each with one or more antennas. The access points do not necessarily have synchronized transmitting and receiving radio frequency oscillators. Approaches to channel estimation between the access points and one or more wireless clients account for the lack of synchronization, and do not necessarily require capabilities at the clients that go beyond required or optional features of standard wireless Ethernet (e.g., 802.11n, 802.11g, or 802.11a), thereby supporting “legacy” clients while supporting high data throughput approaches that provide coherent transmission from the multiple antenna of the access points.
摘要翻译： 分布式无线通信系统包括多个接入点，每个具有一个或多个天线。 接入点不一定具有同步的发射和接收射频振荡器。 在接入点和一个或多个无线客户端之间的信道估计方法考虑到缺乏同步，并且不一定需要超出标准无线以太网的所需或可选特征的客户端的能力（例如，802.11n，802.11g， 或802.11a），从而支持“传统”客户端，同时支持从接入点的多个天线提供相干传输的高数据吞吐量方法。
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