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1. 发明授权

US08761307B1 Low-power narrow and wide band receiver system 有权
标题翻译：低功耗窄带和宽带接收机系统
公开(公告)号：US08761307B1
公开(公告)日：2014-06-24
申请号：US13156105
申请日：2011-06-08
申请人： Dumitru Mihai Ionescu , Ivan Krivokapic , Abu Amanullah , Haidong Zhu , Lichung Chu
发明人： Dumitru Mihai Ionescu , Ivan Krivokapic , Abu Amanullah , Haidong Zhu , Lichung Chu
IPC分类号： H03K9/00 , H04L27/00
CPC分类号： H04L1/0057 , H04L1/0045 , H04L1/0071
摘要： A communications device and receiver system and method to efficiently distribute functions among radio frequency (RF), analog front end (AFE) and baseband modules for ultra-low power consumption comprising a wideband receiver subsystem selectively coupled to a signal input receiving a first frequency band, a narrowband received subsystem selectively coupled to the signal input receiving a second frequency band and, a controller configured to monitor the first frequency band using the first receiver subsystem and if a wake up signal is detected using the first receiver subsystem, connect the second receiver subsystem to the signal input and tune the second receiver subsystem to a channel transmitting the wake up signal, the wake up signal including channel selection information defining the channel for subsequent communications. Wherein, the two frequency bands overlap and center on different frequencies.
摘要翻译：一种用于在射频（RF），模拟前端（AFE）和用于超低功耗的基带模块之间有效分配功能的通信设备和接收机系统和方法，包括：宽带接收机子系统，其选择性地耦合到接收第一频带的信号输入选择性地耦合到接收第二频带的信号输入的窄带接收子系统，以及配置成使用第一接收机子系统监视第一频带并且如果使用第一接收机子系统检测到唤醒信号的控制器，则将第二接收机子系统到信号输入，并将第二接收机子系统调谐到发送唤醒信号的信道，唤醒信号包括定义用于随后通信的信道的信道选择信息。其中两个频带在不同频率上重叠并居中。

2. 发明授权

US08422483B2 Method and system for channel estimation in burst mode 有权
标题翻译：突发模式中信道估计的方法和系统
公开(公告)号：US08422483B2
公开(公告)日：2013-04-16
申请号：US11694575
申请日：2007-03-30
申请人： Ghobad Heidari-Bateni , Abu Amanullah , Dumitru Mihai Ionescu
发明人： Ghobad Heidari-Bateni , Abu Amanullah , Dumitru Mihai Ionescu
IPC分类号： H04J3/06
CPC分类号： H04L25/0228 , H04L27/2647 , H04L27/2656 , H04L27/2662
摘要： The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more channel estimates or channel observables can be combined to compute a refined channel estimate, for example, when the channel estimates or channel observables are from the same channel.
摘要翻译：本发明涉及用于诸如例如在无线通信网络中发现的通信信道的信道估计的系统和方法。可以组合一个或多个信道估计或信道观测值来计算精细信道估计，例如当信道估计或信道可观测量来自相同信道时。

3. 发明授权

US08031793B2 Apparatus using concatenations of signal-space codes for jointly encoding across multiple transmit antennas, and employing coordinate interleaving 失效
标题翻译：使用信号空间码的级联来跨多个发射天线进行联合编码的装置，以及采用坐标交错的装置
公开(公告)号：US08031793B2
公开(公告)日：2011-10-04
申请号：US11039274
申请日：2005-01-19
申请人： Dumitru Mihai Ionescu , Tony Reid
发明人： Dumitru Mihai Ionescu , Tony Reid
IPC分类号： H04B7/02
CPC分类号： H04L1/0041 , H03M13/25 , H03M13/29 , H03M13/2972 , H04L1/005 , H04L1/006 , H04L1/0065 , H04L1/0066 , H04L1/0625 , H04L1/065
摘要： A system for transmitting data over a MIMO channel has a transmitter and a receiver. In the transmitter, the input data is encoded over at least two pipes by a concatenation of at least two constituent signal-space encoders. Each constituent encoder is used to generate, in response to the input data, a sequence of symbols from a channel alphabet having at least one dimension. Each symbol of the channel alphabet includes at least one complex symbol having real and imaginary coordinates. The transmitter interleaves the coordinates of the sequence of channel alphabet symbols, and transmits (from at least two transmit antennas) the interleaved coordinates. Preferably, each constituent encoder maximizes a minimum coordinate-wise Hamming distance between members of all valid pairs of symbol sequences, maximizes a minimum Euclidean distance between members of all valid pairs of different codewords, and obeys an equal eigenvalue criterion.
摘要翻译：用于通过MIMO信道发送数据的系统具有发射机和接收机。在发射机中，输入数据通过至少两个构成信号空间编码器的级联在至少两个管道上进行编码。每个构成编码器用于响应于输入数据，从具有至少一个维度的频道字母表生成符号序列。频道字母表的每个符号包括至少一个具有实数和虚拟坐标的复数符号。发射机交织信道字母符号序列的坐标，并发送（至少两个发射天线）交错坐标。优选地，每个构成编码器使所有有效的符号序列对的成员之间的最小坐标汉明距离最大化，使得所有有效的不同码字对的成员之间的最小欧几里德距离最大化并且服从相等的特征值准则。

4. 发明授权

US08031789B2 Methods and systems for diversity combining of synchronization statistics in OFDM systems 有权
标题翻译： OFDM系统中同步统计分集组合的方法和系统
公开(公告)号：US08031789B2
公开(公告)日：2011-10-04
申请号：US12099017
申请日：2008-04-07
申请人： Dumitru Mihai Ionescu , Abu Amanullah , Ghobad Heidari-Bateni
发明人： Dumitru Mihai Ionescu , Abu Amanullah , Ghobad Heidari-Bateni
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
摘要翻译：本文描述的系统和方法的各种实施例可以用于通过以导频音接收第一OFDM信号来计算最小方差无偏估计器，接收在相同频带中发送的第二OFDM信号，并且确定第一 OFDM信号和第二OFDM信号。在一些实施例中，差分相位度量可用于分集组合同步统计。在各种实施例中，差分相位度量可用于检测窄带干扰。

5. 发明申请

US20080240261A1 METHOD AND SYSTEM FOR CHANNEL ESTIMATION IN BURST MODE 有权
标题翻译：冲击模式下的通道估计方法与系统
公开(公告)号：US20080240261A1
公开(公告)日：2008-10-02
申请号：US11694575
申请日：2007-03-30
申请人： Ghobad Heidari-Bateni , Abu Amanullah , Dumitru Mihai Ionescu
发明人： Ghobad Heidari-Bateni , Abu Amanullah , Dumitru Mihai Ionescu
IPC分类号： H04L27/28
CPC分类号： H04L25/0228 , H04L27/2647 , H04L27/2656 , H04L27/2662
摘要： The present invention is directed to a system and method for channel estimation for a communication channel such as, for example, that found in a wireless communication network. One or more channel estimates or channel observables can be combined to compute a refined channel estimate, for example, when the channel estimates or channel observables are from the same channel.
摘要翻译：本发明涉及用于诸如例如在无线通信网络中发现的通信信道的信道估计的系统和方法。可以组合一个或多个信道估计或信道观测值来计算精细信道估计，例如当信道估计或信道可观测量来自相同信道时。

6. 发明授权

US07409001B2 Method and apparatus using coordinate interleaving to increase diversity in a MIMO system 失效
标题翻译：使用坐标交织来增加MIMO系统中的分集的方法和装置
公开(公告)号：US07409001B2
公开(公告)日：2008-08-05
申请号：US10918533
申请日：2004-08-12
申请人： Dumitru Mihai Ionescu , Steven Gray
发明人： Dumitru Mihai Ionescu , Steven Gray
IPC分类号： H04B7/02
CPC分类号： H04L1/0625 , H04B7/0417 , H04B7/0626 , H04L1/0047 , H04L1/005 , H04L1/006 , H04L1/0068 , H04L1/0071 , H04L1/0631 , H04L5/06 , H04L27/183 , H04L27/186 , H04L27/2003 , H04L27/2604 , H04L27/3416 , H04L27/3488
摘要： A method to increase diversity in MIMO fading channels interleaves coordinates of complex symbol(s) in a transmission frame after encoding and modulating. Specifically, an input signal is encoded and modulated into a codeword, jointly across at least two pipes, said pipes having space, time, frequency, or other nature, wherein the codeword spans a frame and is defined as at least one complex symbol whose complex values are all those to be transmitted during all channel uses covered by the frame. Each of the complex symbols have a first and second coordinate. After modulating, which may be combined with encoding in a signal space encoder, the coordinates are interleaved. In modulation, the complex symbols (typically two dimensional) may arise as elements of a multidimensional (typically greater than two dimensions) signal constellation, in which case those multidimensional constellation coordinates are the ones that are interleaved in the frame. The frame carrying the interleaved coordinates is transmitted by the first and at least second antennas, possible opposed sub-frames of the overall frame being transmitted separately by opposed antennas. A coset selector is used in some embodiments to maximize a minimum Hamming distance, and/or a minimum Euclidean distance, between coordinates within a coset to control diversity and/or coding gain. In some embodiments, the operation of the encoder and modulator is such as to maximize a minimum coordinate-wise Hamming distance, and/or a minimum Euclidean distance, between allowable codewords, and/or to provide additional structure for the allowable codewords. A method, transmitter, system, and mobile station are described.
摘要翻译：增加MIMO衰落信道分集的方法在编码和调制之后的传输帧中交织复杂符号的坐标。具体地，输入信号被编码并且被调制成码字，共同跨越至少两个管道，所述管道具有空间，时间，频率或其他性质，其中码字跨越一个帧并被定义为至少一个复数符号，其复数值都是在框架覆盖的所有通道使用期间传输的值。每个复数符号具有第一和第二坐标。在可以与信号空间编码器中的编码组合的调制之后，坐标被交织。在调制中，复数符号（通常为二维）可以作为多维（通常大于二维）信号星座的元素而出现，在这种情况下，这些多维星座坐标是在帧中交错的那些。承载交织坐标的帧由第一和至少第二天线发送，整个帧的可能相对的子帧由相对的天线分开发送。在一些实施例中使用陪集选择器来最大化陪集中的坐标之间的最小汉明距离和/或最小欧氏距离以控制分集和/或编码增益。在一些实施例中，编码器和调制器的操作使得可允许代码字之间的最小坐标汉明距离和/或最小欧几里德距离最大化，和/或为允许的码字提供附加结构。描述了一种方法，发射机，系统和移动台。

7. 发明授权

US08576961B1 System and method for adaptive overlap and add length estimation 有权
标题翻译：用于自适应重叠和加长度估计的系统和方法
公开(公告)号：US08576961B1
公开(公告)日：2013-11-05
申请号：US12484893
申请日：2009-06-15
申请人： Haidong Zhu , Dumitru Mihai Ionescu , Abu Amanullah
发明人： Haidong Zhu , Dumitru Mihai Ionescu , Abu Amanullah
IPC分类号： H04L27/06
CPC分类号： H04L27/2656 , H04L25/0224 , H04L27/2663 , H04L27/2665 , H04L27/2695
摘要： A method for determining an overlap and add length estimate comprises determining a plurality of correlation values of a plurality of ordered frequency domain samples obtained from a data frame; comparing the correlation values of a first subset of the samples to a first predetermined threshold to determine a first edge sample; comparing the correlation values of a second subset of the samples to a second predetermined threshold to determine a second edge sample; using the first and second edge samples to determine an overlap and add length estimate; and providing the overlap and add length estimate to an overlap and add circuit.
摘要翻译：一种用于确定重叠和加法长度估计的方法包括确定从数据帧获得的多个有序频域样本的多个相关值; 将样本的第一子集的相关值与第一预定阈值进行比较，以确定第一边缘样本; 将样本的第二子集的相关值与第二预定阈值进行比较，以确定第二边缘样本; 使用第一和第二边缘样本来确定重叠和加法长度估计; 并将重叠和加法长度估计提供给重叠和加法电路。

8. 发明授权

US08345783B1 Phase tracking system and method 有权
标题翻译：相位跟踪系统及方法
公开(公告)号：US08345783B1
公开(公告)日：2013-01-01
申请号：US13077968
申请日：2011-03-31
申请人： Dumitru Mihai Ionescu , Haidong Zhu , Abu Amanullah
发明人： Dumitru Mihai Ionescu , Haidong Zhu , Abu Amanullah
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Phase tracking in an OFDM symbol comprises determining a sufficient statistic for CFO and SFO estimation from a differential metric between a current OFDM symbol and a previous OFDM symbol transmitted on the same frequency band. The sufficient statistics corresponding to positive pilot tones are combined with those corresponding to negative pilot tones to estimate the CFO and SFO.
摘要翻译： OFDM符号中的相位跟踪包括从当前OFDM符号和在相同频带上发送的先前OFDM符号之间的差分度量确定用于CFO和SFO估计的足够的统计量。与正导频音相对应的足够的统计量与与负导频音相对应的统计量结合起来来估计CFO和SFO。

9. 发明申请

US20120307839A1 METHOD FOR RECEIVING CHANNEL SELECTION INFORMATION 审中-公开
标题翻译：接收频道选择信息的方法
公开(公告)号：US20120307839A1
公开(公告)日：2012-12-06
申请号：US13149727
申请日：2011-05-31
申请人： Dumitru Mihai Ionescu , Abu Amanullah , Haidong Zhu
发明人： Dumitru Mihai Ionescu , Abu Amanullah , Haidong Zhu
IPC分类号： H04L12/28
CPC分类号： H04L5/0033 , A61N1/3727 , A61N1/3956 , H04W84/20
摘要： A master device selects a channel from a band of channels for communications with a slave device. The master transmits information identifying the selected to the slave device using a packet modulated as a series of energy pulses on the selected channel. The slave device performs wideband energy detection on the band of channels and receives the modulated pulses. The slave device decodes the modulated pulses to retrieve the selected channel, and tunes to the selected channel for further communications.
摘要翻译：主设备从用于与从设备通信的信道频带中选择一个信道。主设备使用在所选择的信道上作为一系列能量脉冲调制的分组来将识别所选择的信息发送到从设备。从设备对信道频带进行宽带能量检测，并接收调制脉冲。从设备对调制的脉冲进行解码以检索所选择的信道，并调谐到所选择的信道用于进一步的通信。

10. 发明授权

US08077786B2 Methods and systems for detecting a narrow-band interferer 有权
标题翻译：用于检测窄带干扰源的方法和系统
公开(公告)号：US08077786B2
公开(公告)日：2011-12-13
申请号：US12099002
申请日：2008-04-07
申请人： Dumitru Mihai Ionescu , Abu Amanullah , Ghobad Heidari-Bateni
发明人： Dumitru Mihai Ionescu , Abu Amanullah , Ghobad Heidari-Bateni
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2657 , H04J11/0066 , H04L27/2675 , H04L27/2691
摘要： Various embodiments of the systems and methods described herein may be used to compute a minimum variance unbiased estimator by receiving a first OFDM signal at a pilot tone, receiving a second OFDM signal sent in the same frequency band and determining a differential phase metric between the first OFDM signal and the second OFDM signal. In some embodiments, the differential phase metric may be used to diversity combine synchronization statistics. In various embodiments, the differential phase metric may be used to detect a narrow-band interference.
摘要翻译：本文描述的系统和方法的各种实施例可以用于通过以导频音接收第一OFDM信号来计算最小方差无偏估计器，接收在相同频带中发送的第二OFDM信号，并且确定第一 OFDM信号和第二OFDM信号。在一些实施例中，差分相位度量可用于分集组合同步统计。在各种实施例中，差分相位度量可用于检测窄带干扰。

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