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1. 发明授权

US09825657B2 Digital pre-distortion linearization for mobile communication 有权
公开(公告)号：US09825657B2
公开(公告)日：2017-11-21
申请号：US14993382
申请日：2016-01-12
申请人： Google Inc.
发明人： Farbod Tabatabai , Dedi David Haziza
IPC分类号： H04K1/02 , H04L25/03 , H04B1/04 , H04B1/62
CPC分类号： H04B1/0475 , H03F1/30 , H03F1/3247 , H03F3/19 , H03F3/245 , H04B1/62 , H04B2001/0425
摘要： This disclosure provides systems, methods, and apparatus for a radio frequency transceiver. The transceiver includes a modulator for modulating a data signal onto one or more carrier signals to generate a modulated signal and a power amplifier for amplifying the modulated signal. The transceiver also includes a data pre-distorter (DPD) for pre-distorting the data signal using a look-up table that represents a non-linear transfer function that is an inverse of the non-linear transfer function of the power amplifier. The DPD selects one or more look-up tables based on a feedback signal corresponding to a power level and/or a phase of the output of the power amplifier. The transmitter also includes a controller for comparing the output of the power amplifier to a desired output level and upon sensing changes, altering the amplitude and phase of the feedback signal to substantially constant values.

2. 发明申请

US20170288913A1 Wireless Telecommunications System For High-Mobility Applications 有权
公开(公告)号：US20170288913A1
公开(公告)日：2017-10-05
申请号：US15410578
申请日：2017-01-19
申请人： Cohere Technologies
发明人： Shlomo Rakib , Ron Hadani
IPC分类号： H04L25/03 , H04L1/00
CPC分类号： H04L25/03006 , H04B1/0475 , H04B1/62 , H04B15/00 , H04J11/003 , H04L1/0018 , H04L5/0014 , H04L5/0023 , H04L23/02 , H04L25/03834 , H04L27/04 , H04L27/06 , H04L27/2626 , H04W72/04
摘要： A wireless telecommunications system that mitigates infra-symbol interference due to Doppler-shift and multipath. Embodiments of the present invention are particularly advantageous for wireless telecommunications systems that operate in high-mobility environments, including high-speed trains and airplanes.

3. 发明授权

US09778902B2 Software digital front end (SoftDFE) signal processing 有权
公开(公告)号：US09778902B2
公开(公告)日：2017-10-03
申请号：US13701374
申请日：2012-10-26
申请人： Intel Corporation
发明人： Kameran Azadet , Chengzhou Li , Albert Molina , Joseph H. Othmer , Steven C. Pinault , Meng-Lin Yu , Joseph Williams , Ramon Sanchez Perez , Jian-Guo Chen
IPC分类号： G06F5/01 , G06F17/15 , G06F9/30 , H03H17/06 , H04B1/04 , H04L1/00 , H04L27/233 , H04B1/62 , H04L25/02 , H04L25/03 , H03M3/00 , H03F1/02 , H03F1/32 , H03F3/189 , H03F3/24 , H04L25/49 , H04B1/00
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： Software Digital Front End (SoftDFE) signal processing techniques are provided. One or more digital front end (DFE) functions are performed on a signal in software by executing one or more specialized instructions on a processor to perform the one or more digital front end (DFE) functions on the signal, wherein the processor has an instruction set comprised of one or more of linear and non-linear instructions. A block of samples comprised of a plurality of data samples is optionally formed and the digital front end (DFE) functions are performed on the block of samples. The specialized instructions can include a vector convolution function, a complex exponential function, an xk function, a vector compare instruction, a vector max( ) instruction, a vector multiplication instruction, a vector addition instruction, a vector sqrt( ) instruction, a vector 1/x instruction, and a user-defined non-linear instruction.

4. 发明申请

US20170201952A1 TECHNIQUES FOR MODIFYING TRANSCEIVER POWER DURING DIGITAL PRE-DISTORTION TRAINING 有权
公开(公告)号：US20170201952A1
公开(公告)日：2017-07-13
申请号：US14993793
申请日：2016-01-12
申请人： QUALCOMM Incorporated
发明人： Walid Khairy Mohamed AHMED , Ori AUSLENDER , Victor Alexander ABRAMSKY , Prashanth HANDE , Ran IRON , Yeuda RAZ
IPC分类号： H04W52/24 , H04B1/62
CPC分类号： H04W52/244 , H03F1/3247 , H03F3/24 , H03F2201/3233 , H04B1/62 , H04W52/367
摘要： Various aspects described herein relate to adjusting transmit power of a radio frequency (RF) transceiver. A total power adjustment for adjusting a transmit power of the RF transceiver can be determined. The transmit power can be adjusted to a first adjusted transmit power based at least in part on a first adjustment size that is less than the total power adjustment and determined based at least in part on the transmit power. Digital pre-distortion (DPD) training of the RF transceiver can be performed to adjust one or more coefficients for calibrating the RF transceiver based on the first adjusted transmit power. The first adjusted transmit power can be adjusted to a second adjusted transmit power based at least in part on a second adjustment size that is less than the total power adjustment and computed based at least in part on the first adjusted transmit power.

5. 发明授权

US09632750B2 Direct digital synthesis of signals using maximum likelihood bit-stream encoding 有权
公开(公告)号：US09632750B2
公开(公告)日：2017-04-25
申请号：US14944184
申请日：2015-11-17
申请人： Intel Corporation
发明人： Kameran Azadet , Steven C. Pinault
IPC分类号： G06F5/01 , H04B1/04 , H04L1/00 , H04L27/233 , H04B1/62 , G06F9/30 , H04L25/02 , H04L25/03 , H03M3/00 , H03F1/02 , H03F1/32 , H03F3/189 , H03F3/24 , H04L25/49 , H04B1/00
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： Maximum likelihood bit-stream generation and detection techniques are provided using the M-algorithm and Infinite Impulse Response (IIR) filtering. The M-Algorithm is applied to a target input signal X to perform Maximum Likelihood Sequence Estimation on the target input signal X to produce a digital bit stream B, such that after filtering by an IIR filter, the produced digital stream Y produces an error signal satisfying one or more predefined requirements. The predefined requirements comprise, for example, a substantially minimum error. In an exemplary bit detection implementation, the target input signal X comprises an observed analog signal and the produced digital stream Y comprises a digitized output of a receive channel corresponding to a transmitted bit stream. In an exemplary bit stream generation implementation, the target input signal X comprises a desired transmit signal and the produced digital stream Y comprises an estimate of the desired transmit signal.

6. 发明授权

US09584181B2 Channel estimation 有权
标题翻译：频道估计
公开(公告)号：US09584181B2
公开(公告)日：2017-02-28
申请号：US14062983
申请日：2013-10-25
申请人： LANTIQ DEUTSCHLAND GMBH
发明人： Rainer Strobel , Vladimir Oksman
IPC分类号： H04L27/06 , H04B3/32 , H04B17/00 , H04B1/62 , H04L25/00 , H04L25/02 , H04L5/00 , H04L25/03
CPC分类号： H04B3/32 , H04B1/62 , H04B17/00 , H04B17/354 , H04L5/0044 , H04L5/006 , H04L25/00 , H04L25/0204 , H04L25/0206 , H04L25/0226 , H04L25/03159 , H04L25/03343 , H04L2025/03426
摘要： Methods and devices related to channel estimation for a communication system comprising a plurality of communication connections are provided. For channel estimation, test sequences are used having three different elements, for example −1, 0 and +1.
摘要翻译：提供了与包括多个通信连接的通信系统的信道估计相关的方法和设备。对于信道估计，使用测试序列具有三个不同的元素，例如-1,0和+1。

7. 发明申请

US20160365950A1 DIRECT DIGITAL SYNTHESIS OF SIGNALS USING MAXIMUM LIKELIHOOD BIT-STREAM ENCODING 有权
标题翻译：使用最大似然比特流编码的信号的直接数字合成
公开(公告)号：US20160365950A1
公开(公告)日：2016-12-15
申请号：US15187651
申请日：2016-06-20
申请人： Intel Corporation
发明人： Kameran Azadet
IPC分类号： H04L1/00 , H04L25/49 , H04B1/04
CPC分类号： G06F9/3001 , G06F5/01 , G06F9/30036 , G06F17/15 , H03F1/0288 , H03F1/3241 , H03F1/3258 , H03F3/189 , H03F3/24 , H03F2200/336 , H03F2201/3209 , H03F2201/3212 , H03F2201/3224 , H03F2201/3233 , H03H17/06 , H03M3/30 , H04B1/0003 , H04B1/0475 , H04B1/62 , H04B2001/0408 , H04L1/0054 , H04L25/02 , H04L25/03 , H04L25/03178 , H04L25/03216 , H04L25/4917 , H04L27/2334
摘要： Methods and apparatus are provided for direct synthesis of RF signals using maximum likelihood sequence estimation. An RF digital RF input signal is synthesized by performing maximum likelihood sequence estimation on the digital RF input signal to produce a digital stream, such that after filtering by a prototype filter the produced digital stream produces a substantially minimum error. The substantially minimum error comprises a difference between a digital output of the prototype filter and the digital RF input signal. The digital stream is substantially equal to the input digital RF signal. The digital stream can be applied to an analog restitution filter, and the output of the analog restitution filter comprises an analog RF signal that approximates the digital RF input signal.
摘要翻译：提供了使用最大似然序列估计直接合成RF信号的方法和装置。通过对数字RF输入信号执行最大似然序列估计来合成RF数字RF输入信号以产生数字流，使得在通过原型滤波器滤波之后，所产生的数字流产生基本上最小的误差。基本上最小的误差包括原型滤波器的数字输出和数字RF输入信号之间的差异。数字流基本上等于输入的数字RF信号。数字流可以应用于模拟恢复滤波器，并且模拟恢复滤波器的输出包括近似数字RF输入信号的模拟RF信号。

8. 发明申请

US20160329631A1 ACTIVE ANTENNA SYSTEM 审中-公开
标题翻译：主动天线系统
公开(公告)号：US20160329631A1
公开(公告)日：2016-11-10
申请号：US15109095
申请日：2014-12-30
申请人： Tobias SORG , PATEV ASSOCIATES GMBH
发明人： Clemens Rheinfelder , Edelbert Häfele , Michael Tauber
IPC分类号： H01Q1/24 , H01Q3/34 , H04B17/12 , H04B7/04 , H04L12/26 , H01Q3/26 , H04B1/62
CPC分类号： H01Q1/246 , H01Q3/2605 , H01Q3/34 , H01Q21/0025 , H04B1/40 , H04B1/62 , H04B7/04 , H04B17/12 , H04B17/21 , H04L43/106
摘要： The object of the present invention is to provide an active antenna system which is flexibly configurable and efficient in operation. According to a first aspect of the present invention an active antenna system comprises a radio equipment having a plurality of transceiver modules, each transceiver module being connected to at least one antenna, and a radio equipment control unit having a hub being connected to the transceiver modules via an antenna interconnect. The hub is embodied for receiving base band signals via the antenna interconnect from the transceiver modules and to extract channel signals from the received base band signals. As the hub is arranged in the radio equipment control unit which is part of a base station the base band signals are transmitted to the radio equipment control unit without extracting the channel signals. This allows easily to distribute the base band signals on several data connections, particularly several antenna cables, of one antenna interconnect. This results in a reduced information loss and minimizes the requirements for the transmission capacity of a single data connection of the antenna interconnect between the radio equipment control unit and the radio equipment. The radio equipment control unit does receive all the information which is originally received by the transceiver modules.
摘要翻译：本发明的目的是提供一种灵活可配置且有效的操作的有源天线系统。根据本发明的第一方面，有源天线系统包括具有多个收发器模块的无线电设备，每个收发器模块连接到至少一个天线，以及无线电设备控制单元，其具有连接到收发器模块通过天线互连。集线器被实现为经由来自收发器模块的天线互连接收基带信号，并从接收的基带信号中提取信道信号。由于集线器被布置在作为基站的一部分的无线电设备控制单元中，所以基带信号被传送到无线电设备控制单元而不提取信道信号。这允许容易地将基带信号分布在一个天线互连的几个数据连接，特别是数个天线电缆上。这导致信息丢失减少，并且使对无线电设备控制单元和无线电设备之间的天线互连的单个数据连接的传输容量的要求最小化。无线电设备控制单元确实接收到最初由收发器模块接收的所有信息。

9. 发明授权

US09489961B2 Controlling a noise-shaping feedback loop in a digital audio signal encoder avoiding instability risk of the feedback 有权
标题翻译：控制数字音频信号编码器中的噪声整形反馈回路，避免反馈的不稳定风险
公开(公告)号：US09489961B2
公开(公告)日：2016-11-08
申请号：US13806625
申请日：2011-06-17
申请人： Stéphane Ragot , Balazs Kovesi , Alain Le Guyader
发明人： Stéphane Ragot , Balazs Kovesi , Alain Le Guyader
IPC分类号： G10L19/00 , G10L21/00 , G10L19/032 , G10L19/04 , H04B1/62
CPC分类号： G10L19/032 , G10L19/04 , H04B1/62
摘要： A method and apparatus are provided for controlling the shaping of encoding noise during the ADPCM encoding of a digital audio input signal. The noise-shaping is carried out through the use of feedback that comprises filtering noise. The method includes the following steps: obtaining a parameter for indicating a high spectral dynamic range of the signal, the parameter indicating a risk of instability of the feedback; detecting a risk of instability by comparing the indication parameter to at least one predetermined threshold; limiting the feedback in the event that a risk of instability is detected; and gradually reactivating the feedback over a predetermined number of frames subsequent to the current frame for which the feedback is limited. Also provided is an encoder with feedback, including a control module implementing the control method as described.
摘要翻译：提供了一种方法和装置，用于在数字音频输入信号的ADPCM编码期间控制编码噪声的整形。通过使用包括滤波噪声的反馈来进行噪声整形。该方法包括以下步骤：获得用于指示信号的高光谱动态范围的参数，该参数指示反馈不稳定的风险; 通过将所述指示参数与至少一个预定阈值进行比较来检测不稳定性的风险; 在发现不稳定风险的情况下限制反馈; 并且在反馈被限制的当前帧之后的预定数量的帧上逐渐重新激活反馈。还提供了具有反馈的编码器，包括实现如上所述的控制方法的控制模块。

10. 发明申请

US20160308562A1 DIGITAL SUPPRESSION OF TRANSMITTER INTERMODULATION IN RECEIVER 有权
公开(公告)号：US20160308562A1
公开(公告)日：2016-10-20
申请号：US15191793
申请日：2016-06-24
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Mark Wyville , Lars Johan Thorebäck , Spendim Dalipi
IPC分类号： H04B1/10 , H04B1/62 , H04B1/525 , H04L12/26
CPC分类号： H04B1/62 , H04B1/1018 , H04B1/525 , H04L43/028
摘要： Systems and methods for suppressing transmitter noise in a receive band of a co-located receiver that are suitable for wideband applications are disclosed. In one embodiment, a transmitter is configured to upconvert and amplify a digital transmit signal to provide an analog radio frequency transmit signal at an output of the transmitter that includes a desired signal in a transmit band of the transmitter and transmitter noise in a receive band of a main receiver. The main receiver is configured to amplify, downconvert, and digitize an analog radio frequency receive signal to provide a digital receive signal. The digital feedforward transmit noise cancellation subsystem is configured to process the digital transmit signal to generate a digital transmitter noise cancellation signal that is representative of the transmitter noise in the receive band and is subtracted from the digital receive signal to thereby provide a compensated digital receive signal.

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