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1. 发明授权

US09712211B2 Quadrature demodulator for a very high bit rate RFID receiver 有权
公开(公告)号：US09712211B2
公开(公告)日：2017-07-18
申请号：US15204310
申请日：2016-07-07
申请人： Commissariat A L'Energie Atomique et aux Energies Alternatives
发明人： Pierre Courouve , Jean-Baptiste Dore , Manuel Pezzin
IPC分类号： H04L27/22 , H04B5/00 , H03D3/04 , H04L27/233 , H04L27/38 , H04L27/227
CPC分类号： H04B5/0062 , H03D3/007 , H03D3/04 , H04L27/2272 , H04L27/2278 , H04L27/233 , H04L27/3845
摘要： A quadrature demodulator not requiring analog mixers. The demodulation is made using a first integrator and a second integrator which are controlled by square logic signals at twice the frequency of the carrier, the received signal being alternatively integrated by the first integrator and the second integrator over periods of time equal to a quarter period of time of the carrier frequency. The samples of the first and second integrators are sampled and subtracted from each other. The successive samples are combined in a first and a second combining module for providing in-phase and quadrature component samples. This demodulator can further be provided with a synchronization module IQ and a symbol synchronization module.

2. 发明申请

US20170187562A1 Bluetooth low energy frequency offset and modulation index estimation 有权
公开(公告)号：US20170187562A1
公开(公告)日：2017-06-29
申请号：US14757821
申请日：2015-12-23
申请人： Intel IP Corporation
发明人： Lu Lu , Jinyong Lee , Xuan Steven Li , Aiguo Yan
IPC分类号： H04L27/26 , H04B17/20 , H04W4/00 , H04L27/32
CPC分类号： H04L27/2649 , H04B17/20 , H04L27/16 , H04L27/233 , H04L27/32 , H04L27/3845 , H04L2027/0026 , H04W4/80
摘要： A Bluetooth Low Energy (BLE) device, having a demodulator configured to translate in-phase and quadrature components of a received BLE signal into a differential phase signal; an estimator configured to estimate a frequency offset of the differential phase signal; and a detector configured to detect information in the differential phase signal corrected by the estimated frequency offset.

3. 发明授权

US09137006B1 Non-integer oversampled timing recovery for higher order quadrature modulation communication systems using quadrature and in-phase samples 有权
标题翻译：使用正交和同相采样的高阶正交调制通信系统的非整数过采样定时恢复
公开(公告)号：US09137006B1
公开(公告)日：2015-09-15
申请号：US14520373
申请日：2014-10-22
申请人： THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
发明人： Gerard Wohlrab
IPC分类号： H04L7/00 , H04L7/033 , H04L27/34 , H04L1/20 , H03L7/08 , H03L7/093 , H03L7/091 , H03L7/107
CPC分类号： H04L7/0029 , H04L7/0331 , H04L27/3405 , H04L27/3845
摘要： Apparatus and method for performing entirely digital timing recovery for high bandwidth radio frequency communications. The received digital data source can be sampled from any (minimum 2×) non-integer oversampled transmitted data. This method re-samples the data through interpolation and phase adjustment. The output phase error adjusts the receiver's Analog-to-digital Convertor sampling clock to improve synchronization with the transmitter's Digital-to-analog Convertor clock phase, thus improving transmitted symbol recovery.
摘要翻译：用于对高带宽射频通信执行完全数字定时恢复的装置和方法。所接收的数字数据源可以从任何（最小2×）非整数过采样发送数据中采样。该方法通过插值和相位调整重新采样数据。输出相位误差调整接收机的模拟数字转换器采样时钟，以改善与发射机的数/模转换器时钟相位的同步，从而改善传输的符号恢复。

4. 发明授权

US09020073B2 Low intermediate frequency receiver 有权
标题翻译：低中频接收机
公开(公告)号：US09020073B2
公开(公告)日：2015-04-28
申请号：US11877455
申请日：2007-10-23
申请人： Stefan van Waasen , Christian Grewing , Michael Lewis
发明人： Stefan van Waasen , Christian Grewing , Michael Lewis
IPC分类号： H03K9/00 , H04L27/00 , H04L27/38 , H04B1/30
CPC分类号： H04L27/38 , H04B1/30 , H04L27/3845 , H04L27/3881
摘要： One embodiment relates to a low intermediate frequency (IF) receiver. The low-IF receiver includes an analog front end that is configured to receive a modulated IQ data signal and provide an in-phase signal and a quadrature signal, where the in-phase signal is phase shifted by approximately 90° relative to the quadrature signal. The low-IF receiver further includes a digital processing block, and a single path that provides only one of the in-phase signal and the quadrature signal to the digital processing block. Other receivers and methods are also disclosed.
摘要翻译：一个实施例涉及一种低中频（IF）接收机。低IF接收机包括模拟前端，其被配置为接收经调制的IQ数据信号并提供同相信号和正交信号，其中同相信号相对于正交信号相移大约90° 。低中频接收机还包括数字处理块，以及将数字处理块仅提供同相信号和正交信号中的一个的单个路径。还公开了其他接收器和方法。

5. 发明授权

US08564362B2 Filter circuit, semiconductor integrated circuit, communication apparatus, semiconductor device, and system 有权
标题翻译：滤波电路，半导体集成电路，通信装置，半导体装置及系统
公开(公告)号：US08564362B2
公开(公告)日：2013-10-22
申请号：US13759740
申请日：2013-02-05
申请人： Panasonic Corporation
发明人： Michiko Tokumaru , Heiji Ikoma , Kouji Okamoto
IPC分类号： H03K5/00
CPC分类号： H03H11/04 , H03H17/0223 , H03H2017/0247 , H04L25/02 , H04L27/36 , H04L27/38 , H04L27/3845
摘要： A filter circuit includes two parallel digital filters, a DAC, and an LPF. The DAC includes two parallel decoders, a parallel-to-serial converter, a switch driver, and a switch. A PLL circuit supplies a reference clock to the DAC. A frequency divider provided in the DAC divides the frequency of the reference clock by two, and supplies the half frequency clock to a parallel processing section (the two decoders and the parallel-to-serial converter) of the DAC and the two digital filters. This makes it easy to secure a timing margin, permitting use in high-speed communication on the order of several GHz.
摘要翻译：滤波电路包括两个并行数字滤波器，DAC和LPF。 DAC包括两个并行解码器，并行转换器，开关驱动器和开关。 PLL电路为DAC提供参考时钟。 DAC中提供的分频器将参考时钟的频率除以2，并将半频时钟提供给DAC和两个数字滤波器的并行处理部分（两个解码器和并行到串行转换器）。这样可以很容易地确保定时裕度，从而允许在几GHz数量级的高速通信中使用。

6. 发明授权

US08290090B2 Blind amplitude estimation for received symbols 有权
标题翻译：接收符号的盲幅度估计
公开(公告)号：US08290090B2
公开(公告)日：2012-10-16
申请号：US12346515
申请日：2008-12-30
申请人： Alexander Lampe , Stefan Mueller-Weinfurtner
发明人： Alexander Lampe , Stefan Mueller-Weinfurtner
IPC分类号： H03K9/06
CPC分类号： H04L27/3845
摘要： A receiver apparatus and method are provided blind amplitude estimation for a received complex signal, wherein the complex signal is analyzed to determine first and second order statistics of real part and imaginary part of the complex signal. Based on a predetermined non-linear function, amplitude scaling information is pre-calculated and used to derive a desired amplitude scaling information for said determined first and second order statistics. Thereby, a low complexity method for blind amplitude estimation for unknown data symbols distorted by an unknown amount of noise can be provided.
摘要翻译：提供接收机装置和方法来确定接收的复信号的盲幅估计，其中分析复信号以确定复信号的实部和虚部的一阶和二阶统计。基于预定的非线性函数，幅度缩放信息被预先计算并用于导出用于所确定的第一和第二阶数统计的期望的幅度缩放信息。因此，可以提供用于由未知量的噪声失真的未知数据符号的盲幅度估计的低复杂度方法。

7. 发明申请

US20110007694A1 FREQUENCY TRACKING LOOP FOR WIRELESS COMMUNICATIONS 有权
标题翻译：无线通信的频率跟踪环
公开(公告)号：US20110007694A1
公开(公告)日：2011-01-13
申请号：US12500517
申请日：2009-07-09
申请人： Byoung-Hoon Kim , Peter Gaal , Yongbin Wei
发明人： Byoung-Hoon Kim , Peter Gaal , Yongbin Wei
IPC分类号： H04W72/00 , H04K1/10
CPC分类号： H04L27/2657 , H04L27/2676 , H04L27/2695 , H04L27/3845
摘要： Systems and methodologies are described that facilitate computing discriminator signals for frequency tracking in wireless communications. The discriminator signal can be computed based at least in part on representations of a received signal shifted upward by a portion of a frequency tone and downward by the portion of the frequency tone. The shifted signals can be summed, and a dot product of the summed signals and a channel estimation of the original signal can be computed to remove uncertain frequency response due to fading. The discriminator signal can be computed as the imaginary portion of the dot product. A frequency error offset can be determined from the discriminator signal and applied to a receiver to tune alignment of the receiver with frequencies of received signals.
摘要翻译：描述了在无线通信中促进用于频率跟踪的鉴别器信号的系统和方法。可以至少部分地基于由向上移动频率一部分并且向下移动频率音调的部分的接收信号的表示来计算鉴别器信号。移位的信号可以相加，并且可以计算求和的信号和原始信号的信道估计的积积以消除由于衰落引起的不确定的频率响应。鉴别器信号可以计算为点积的虚部。可以根据鉴别器信号确定频率误差偏移，并将其应用于接收机，以便将接收机与接收信号的频率进行对准。

8. 发明授权

US07792220B2 Demodulator system and method 有权
标题翻译：解调器系统和方法
公开(公告)号：US07792220B2
公开(公告)日：2010-09-07
申请号：US11641995
申请日：2006-12-19
申请人： Jeffrey Donald Alderson , Darrell Tinker , K. Gozie Ifesinachukwu
发明人： Jeffrey Donald Alderson , Darrell Tinker , K. Gozie Ifesinachukwu
IPC分类号： H04L27/00 , H04L27/06 , H04L27/22
CPC分类号： H04L27/3845 , H04L27/2331
摘要： A demodulator system and method is disclosed. In an embodiment, the demodulator system can include a Coordinate Rotation Digital Computer (CORDIC) mixer to mix a first signal substantially to baseband using a first input frequency and to mix a second signal substantially to baseband using a second input frequency. In another embodiment, the demodulator system can include a phase detector to receive a pilot signal and to generate a control signal to adjust a decimation rate based on the pilot signal. In another embodiment, the demodulator system can include a symbol decoder to determine a symbol from a phase signal.
摘要翻译：公开了一种解调器系统和方法。在一个实施例中，解调器系统可以包括坐标旋转数字计算机（CORDIC）混频器，以使用第一输入频率将第一信号基本上与基带混频，并且使用第二输入频率将基本上与基带的第二信号混合。在另一个实施例中，解调器系统可以包括相位检测器，用于接收导频信号并产生控制信号以根据导频信号来调节抽取率。在另一个实施例中，解调器系统可以包括符号解码器，以从相位信号确定符号。

9. 发明授权

US07477694B2 Enhanced wireless packet data communication system, method, and apparatus applicable to both wide area networks and local area networks 有权
标题翻译：适用于广域网和局域网的增强型无线分组数据通信系统，方法和装置
公开(公告)号：US07477694B2
公开(公告)日：2009-01-13
申请号：US10662530
申请日：2003-09-16
申请人： H. Britton Sanderford, Jr. , Robert E. Rouquette , Gary A. Naden , Marc L. Reed , Gordon J. Boudreaux , Michael R. Brown
发明人： H. Britton Sanderford, Jr. , Robert E. Rouquette , Gary A. Naden , Marc L. Reed , Gordon J. Boudreaux , Michael R. Brown
IPC分类号： H04L5/12 , H04Q7/30
CPC分类号： H03L7/08 , H03B21/00 , H04L5/06 , H04L5/16 , H04L25/061 , H04L25/4902 , H04L25/4921 , H04L27/12 , H04L27/2331 , H04L27/32 , H04L27/34 , H04L27/3433 , H04L27/3483 , H04L27/364 , H04L27/38 , H04L27/3845 , H04W36/08 , H04W72/0426
摘要： A cellular wireless packet data communication system containing transmit-only endpoint devices which transmit to receive-only base stations. The system is configured to allow for large area coverage (e.g., a metropolitan area) with far fewer number base stations than are required with conventional two-way cellular systems. The base station coverage areas are configured to overlap, allowing for reception of packets at multiple base stations. A data concentrator resolves redundantly received messages. The network is configurable as a WAN, a LAN, or a combination of the two. Novel modulation techniques (e.g., a 16QAM submodulation together with a 7FSK modulation) are used such that low cost components can be used in the transmitters and receivers while achieving outstanding probability of success performance. The endpoint devices are battery operated and accordingly, are designed for low power consumption and multi-year battery life. The system is used in a variety of applications including remote monitoring and mobile communications.
摘要翻译：一种蜂窝式无线分组数据通信系统，其包含向仅接收基站发送的仅发送端点设备。该系统被配置为允许具有比常规双向蜂窝系统所需的数量少的基站的大面积覆盖（例如，大都市区域）。基站覆盖区被配置为重叠，允许在多个基站处接收分组。数据集中器解决冗余接收的消息。该网络可配置为WAN，LAN或两者的组合。使用新的调制技术（例如，16QAM子调制以及7FSK调制），使得可以在发射机和接收机中使用低成本组件，同时实现成功性能的突出概率。端点设备是电池供电的，因此设计用于低功耗和多年电池寿命。该系统用于各种应用，包括远程监控和移动通信。

10. 发明授权

US07310305B2 Method for determining reference phase in radio communication system which uses orthogonal M-ary modulation, and coherent detection method using the same 失效
标题翻译：用于使用正交M进制调制的无线电通信系统中的参考相位的确定方法以及使用其的相干检测方法
公开(公告)号：US07310305B2
公开(公告)日：2007-12-18
申请号：US10143747
申请日：2002-05-10
申请人： Hideto Furukawa , Makoto Yoshida , Nami Hatazoe
发明人： Hideto Furukawa , Makoto Yoshida , Nami Hatazoe
IPC分类号： H04J11/00
CPC分类号： H04B1/707 , H04B2001/70935 , H04L27/20 , H04L27/3818 , H04L27/3845
摘要： Reference phase is a radio communication system using orthogonal M-ary modulation is determined, so that a coherent detection system for a CDMA radio communication system is readily achieved. The determination of reference phase is performed by the step of determining a reference phase in a radio communication system, which uses orthogonal M-ary codes comprising the steps of determining the correlation values of an in-phase component and quadrature component corresponding to respective Hadamard matrices resulting from fast Hadamard transform or inverse Hadamard transform of a signal, which possesses said in-phase component and quadrature component, and which is sent from the sending end by phase shift keying an orthogonal M-ary code computing the sum of the squares of the respective correlation values of said in-phase component and quadrature component and selecting either said fast Hadamard transform or inverse Hadamard transform output, which outputs a maximum value of said computed sum of the squares.
摘要翻译：参考相位是确定使用正交M进制调制的无线电通信系统，从而容易地实现用于CDMA无线电通信系统的相干检测系统。参考相位的确定通过确定无线电通信系统中的参考相位的步骤来执行，该无线电通信系统使用正交的M元码，包括以下步骤：确定与相应的哈达玛矩阵相对应的同相分量和正交分量的相关值由具有所述同相分量和正交分量的信号的快速Hadamard变换或反Hadamard变换产生，并且通过相移键控从发送端发送正交M代码，计算正交M代码的平方和所述同相分量和正交分量的相应相关值，并选择所述快速哈达玛变换或反哈达玛变换输出，其输出所计算的平方和的最大值。

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