公开(公告)号：US20120230372A1

公开(公告)日：2012-09-13

申请号：US13045386

申请日：2011-03-10

申请人： Chester Park ,  Niklas Andgart

发明人： Chester Park ,  Niklas Andgart

IPC分类号： H04B1/00 ,  H04B17/00

CPC分类号： H04L27/3863 ,  H04B1/28 ,  H04B1/30 ,  H04B17/21 ,  H04L5/001 ,  H04L27/2634 ,  H04L27/2647

摘要： Digital IQ imbalance compensation is utilized for a dual-carrier double conversion receiver. First, the effect of IQ imbalance on OFDM-based digital baseband is analyzed, showing that, in the presence of IQ imbalance, the baseband signal of each carrier is obtained from its own branch as well as the other branch. Second, IQ imbalance parameters of interest are estimated using pilot signals and compensated using only digital baseband processing.

摘要翻译： 数字IQ不平衡补偿用于双载波双转换接收机。 首先分析了IQ不平衡对基于OFDM的数字基带的影响，表明在存在IQ不平衡的情况下，每个载波的基带信号从其自身的分支以及另一个分支获得。 第二，使用导频信号估计IQ不平衡参数，并仅使用数字基带处理进行补偿。

公开(公告)号：US20120177147A1

公开(公告)日：2012-07-12

申请号：US12987841

申请日：2011-01-10

申请人： Chester Park ,  Lars Sundström ,  Ali S. Khayrallah

发明人： Chester Park ,  Lars Sundström ,  Ali S. Khayrallah

IPC分类号： H04L27/00

CPC分类号： H04B1/0082 ,  H04L5/001 ,  H04L27/2647

摘要： Methods may be provided to simultaneously receive first and second RF (radio frequency) carriers over respective first and second RF carrier frequencies. More particularly, the first and second RF carriers may be provided at an RF mixer stage. During a first time period, the first and second RF carriers may be down converted through the RF mixer stage using a first RF mixer frequency to generate first downconverted signals, and the first downconverted signals may be processed to provide first and second DC carriers corresponding to the first and second RF earners. During a second time period, the first and second RF carriers may be downconverted through the RF mixer stage using a second RF mixer frequency to generate second downconverted signals with the first and second RF mixer frequencies being different, and the second downconverted signals may be processed to provide the first and second DC carriers corresponding to the first and second RF carriers. Related devices are also discussed.

摘要翻译： 可以提供方法以在相应的第一和第二RF载波频率上同时接收第一和第二RF（射频）载波。 更具体地，第一和第二RF载波可以设置在RF混频器级。 在第一时间段期间，第一和第二RF载波可以使用第一RF混频器频率通过RF混频器级下变频以产生第一下变频信号，并且可以处理第一下变频信号以提供对应于 第一和第二RF载波。 在第二时间段期间，第一和第二RF载波可以通过RF混频器级使用第二RF混频器频率进行下变频，以产生具有第一和第二RF混频器频率不同的第二下变频信号，并且可以处理第二下变频信号 以提供对应于第一和第二RF载波的第一和第二DC载波。 还讨论了相关设备。

公开(公告)号：US20110310932A1

公开(公告)日：2011-12-22

申请号：US13128932

申请日：2009-11-10

申请人： Chester Park ,  George Jongren

发明人： Chester Park ,  George Jongren

IPC分类号： H04B1/707

CPC分类号： H04L5/0023 ,  H04L27/2636

摘要： A system, method and node of single-carrier layer shifting for multiple-stream transmission in a network. Per-symbol layer shifting for multiple-stream transmission is implemented using DFTS-OFDM as an access technique. Code word-to-layer mapping is fixed within a DFTS-OFDM symbol and only shifted across consecutive DFTS-OFDM symbols. The method begins by receiving a multiple-stream transmission by a mapping module for transmission. The transmission includes a plurality of subframes and information carrying symbols transmitted on a plurality of layers. A per-symbol layer shifting scheme is then implemented on the transmission where layer shifting is conducted upon each symbol.

摘要翻译： 一种用于网络中多流传输的单载波层移位的系统，方法和节点。 使用DFTS-OFDM作为接入技术来实现用于多流传输的每符号层移位。 码字到层映射固定在DFTS-OFDM符号内，并且仅在连续的DFTS-OFDM符号之间移动。 该方法开始于由映射模块接收多流传输以进行传输。 传输包括在多个层上发送的多个子帧和携带符号的信息。 然后在每个符号上进行层移位的传输上实现每符号层移位方案。

公开(公告)号：US20110268232A1

公开(公告)日：2011-11-03

申请号：US13098954

申请日：2011-05-02

申请人： Chester Park ,  Lars Sundström ,  Jim Svensson

发明人： Chester Park ,  Lars Sundström ,  Jim Svensson

IPC分类号： H04L27/06

CPC分类号： H04L27/3863 ,  H04B1/28 ,  H04B1/30 ,  H04B17/21 ,  H04L5/001 ,  H04L27/2634 ,  H04L27/2647

摘要： Digital IQ imbalance estimation and compensation is facilitated by shaping the frequency response of receiver branches. In particular, in a multi-carrier receiver, the frequency response of signal processing elements in at least one receiver branch is set to not fully attenuate received signals in a frequency band of interest. The frequency band of interest is greater than the carrier bandwidth of the received signal processed by that receiver branch. In some embodiments, the received signal is not attenuated, and adjacent interfering signals are partially attenuated. This allows information regarding the interfering signals to appear in an IQ imbalance-induced, inter-carrier image of the signals in anther receiver branch, facilitating digital estimation and compensation of IQ imbalance.

摘要翻译： 通过对接收机分支的频率响应进行整形，便于数字IQ不平衡估计和补偿。 特别地，在多载波接收机中，将至少一个接收机支路中的信号处理元件的频率响应设置为不完全衰减感兴趣的频带中的接收信号。 感兴趣的频带大于由该接收器分支处理的接收信号的载波带宽。 在一些实施例中，接收的信号不被衰减，并且相邻的干扰信号被部分衰减。 这允许关于干扰信号的信息出现在IQ不平衡引起的另一个接收机分支中信号的载波间图像中，有助于IQ失衡的数字估计和补偿。

公开(公告)号：US20110255638A1

公开(公告)日：2011-10-20

申请号：US12760839

申请日：2010-04-15

申请人： Ali S. Khayrallah ,  Chester Park ,  Yi-Pin Eric Wang

发明人： Ali S. Khayrallah ,  Chester Park ,  Yi-Pin Eric Wang

IPC分类号： H04L27/00

CPC分类号： H04L27/38 ,  H04L25/0242 ,  H04L25/03229 ,  H04L27/3416 ,  H04L2025/03388 ,  H04L2025/03414

摘要： In a receiver with a multi-stage equalizer, such as an SLI equalizer, cumulative symbol estimates generated in one or more early stages of the equalizer are used as effective pilot symbols to improve channel estimation for later stages.

摘要翻译： 在具有多级均衡器（诸如SLI均衡器）的接收机中，在均衡器的一个或多个早期阶段中生成的累积符号估计值被用作有效的导频符号，以改进稍后阶段的信道估计。

公开(公告)号：US20110053539A1

公开(公告)日：2011-03-03

申请号：US12553710

申请日：2009-09-03

申请人： Lars SUNDSTROM ,  Thomas Olsson ,  Leif Wilhelmsson ,  Chester Park

发明人： Lars SUNDSTROM ,  Thomas Olsson ,  Leif Wilhelmsson ,  Chester Park

IPC分类号： H04B17/00

CPC分类号： H04W24/08 ,  H04B17/318 ,  H04B17/382

摘要： A device may include a measurement receiver, a communication receiver, and a transmitter. The measurement receiver may include a receiver (RX) down-conversion component to receive an amplified signal from a low-noise amplifier of the communication receiver, selectively receive a signal from a first local oscillator associated with the communication receiver or a second local oscillator associated with the transmitter, and down-convert the amplified signal to baseband using the received signal from the first local oscillator or the second local oscillator. The measurement receiver may further include a delta-sigma analog-to-digital converter (ADC) to provide low quantization noise only for a particular frequency range to be measured, and a control component to configure the delta-sigma ADC to provide the low quantization noise at the particular frequency range.

摘要翻译： 设备可以包括测量接收器，通信接收器和发射器。 测量接收机可以包括接收器（RX）下变频部件，以从通信接收机的低噪声放大器接收放大的信号，有选择地从与通信接收器相关联的第一本地振荡器或第二本地振荡器相关联地接收信号 并且使用来自第一本地振荡器或第二本地振荡器的接收信号将放大的信号下变频到基带。 测量接收机还可以包括仅用于要测量的特定频率范围的低量化噪声的delta-sigma模数转换器（ADC），以及配置Δ-ΣADC以提供低量化的控制部件 在特定频率范围内的噪声。

公开(公告)号：US08824578B2

公开(公告)日：2014-09-02

申请号：US13128932

申请日：2009-11-10

申请人： Chester Park ,  George Jongren

发明人： Chester Park ,  George Jongren

IPC分类号： H04B1/707 ,  H04L5/00 ,  H04L27/26

CPC分类号： H04L5/0023 ,  H04L27/2636

摘要： A system, method and node of single-carrier layer shifting for multiple-stream transmission in a network. Per-symbol layer shifting for multiple-stream transmission is implemented using DFTS-OFDM as an access technique. Code word-to-layer mapping is fixed within a DFTS-OFDM symbol and only shifted across consecutive DFTS-OFDM symbols. The method begins by receiving a multiple-stream transmission by a mapping module for transmission. The transmission includes a plurality of subframes and information carrying symbols transmitted on a plurality of layers. A per-symbol layer shifting scheme is then implemented on the transmission where layer shifting is conducted upon each symbol.

摘要翻译： 一种用于网络中多流传输的单载波层移位的系统，方法和节点。 使用DFTS-OFDM作为接入技术来实现用于多流传输的每符号层移位。 码字到层映射固定在DFTS-OFDM符号内，并且仅在连续的DFTS-OFDM符号之间移动。 该方法开始于由映射模块接收多流传输以进行传输。 传输包括在多个层上发送的多个子帧和携带符号的信息。 然后在每个符号上进行层移位的传输上实现每符号层移位方案。

公开(公告)号：US08737376B2

公开(公告)日：2014-05-27

申请号：US13303985

申请日：2011-11-23

申请人： Chester Park ,  Jung-Fu Cheng

发明人： Chester Park ,  Jung-Fu Cheng

IPC分类号： H04J1/00

CPC分类号： H04B1/44 ,  H04B1/005 ,  H04B1/0458 ,  H04B1/18

摘要： A frontend module for Time Division Duplex (TDD) with Carrier Aggregation (CA), wherein the frontend module reuses the band selection filters for the aggregated bands and provides switched connections to antenna and transmitter/receiver according to the Uplink (UL)/Downlink (DL) configuration. The use of switches on both the antenna side and the transmitter/receiver side of the frontend module enables the reuse of the band selection filters. The frontend module according to the present invention reduces the number of required filters to only one filter for each TDD-CA Component Carrier (CC) band. Thus, the frontend module avoids unnecessary band selection filters, and thereby also controls the cost of implementation of frontend modules in wireless units operating in the TDD-CA mode.

摘要翻译： 用于具有载波聚合（CA）的时分双工（TDD）的前端模块，其中前端模块重新使用聚合频带的频带选择滤波器，并根据上行链路（UL）/下行链路（UL）/下行链路 DL）配置。 在前端模块的天线侧和发射机/接收机侧使用开关使得能够重用带选择滤波器。 根据本发明的前端模块将针对每个TDD-CA分量载波（CC）频带的所需滤波器数量减少到仅一个滤波器的数量。 因此，前端模块避免了不必要的频带选择滤波器，从而也控制在TDD-CA模式下工作的无线单元中的前端模块的实现成本。

公开(公告)号：US08565352B2

公开(公告)日：2013-10-22

申请号：US13045386

申请日：2011-03-10

申请人： Chester Park ,  Niklas Andgart

发明人： Chester Park ,  Niklas Andgart

IPC分类号： H03D3/00

CPC分类号： H04L27/3863 ,  H04B1/28 ,  H04B1/30 ,  H04B17/21 ,  H04L5/001 ,  H04L27/2634 ,  H04L27/2647

摘要： Digital IQ imbalance compensation is utilized for a dual-carrier double conversion receiver. First, the effect of IQ imbalance on OFDM-based digital baseband is analyzed, showing that, in the presence of IQ imbalance, the baseband signal of each carrier is obtained from its own branch as well as the other branch. Second, IQ imbalance parameters of interest are estimated using pilot signals and compensated using only digital baseband processing.

摘要翻译： 数字IQ不平衡补偿用于双载波双转换接收机。 首先分析了IQ不平衡对基于OFDM的数字基带的影响，表明在存在IQ不平衡的情况下，每个载波的基带信号从其自身的分支以及另一个分支获得。 第二，使用导频信号估计IQ不平衡参数，并仅使用数字基带处理进行补偿。

公开(公告)号：US20130242761A1

公开(公告)日：2013-09-19

申请号：US13421055

申请日：2012-03-15

申请人： Chester Park

发明人： Chester Park

IPC分类号： H04W24/00

CPC分类号： H04L43/08 ,  H04B7/0452 ,  H04B7/0632

摘要： A first communication node communicates by multiple-input-multiple-output (MIMO) wireless communications with a second communication node of a wireless communication system. The method includes receiving a Sounding Reference Signal (SRS) over a plurality of subcarriers transmitted by the second communication node for MIMO communications. Channel quality is measured responsive to the sounding reference signal to output a first channel quality value. A demodulation reference signal is received over a plurality of subcarriers transmitted by the second communication node for MIMO communications. Channel quality is measured responsive to the demodulation reference signal to output a second channel quality value. Reliability of the measurements of the first channel quality value and the second channel quality value is determined. The first and second channel quality values are combined while compensating for the determined reliability difference between the measurements to generate a combined channel quality value. Related communication nodes are disclosed.

摘要翻译： 第一通信节点通过与无线通信系统的第二通信节点的多输入多输出（MIMO）无线通信进行通信。 该方法包括：在由第二通信节点发送的多个子载波上接收用于MIMO通信的探测参考信号（SRS）。 响应于探测参考信号测量信道质量以输出第一信道质量值。 在由第二通信节点发送的用于MIMO通信的多个子载波上接收解调参考信号。 响应于解调参考信号测量信道质量以输出第二信道质量值。 确定第一信道质量值和第二信道质量值的测量的可靠性。 组合第一和第二信道质量值，同时补偿所确定的测量之间的可靠性差异，以产生组合的信道质量值。 公开了相关通信节点。