公开(公告)号：US20130208776A1

公开(公告)日：2013-08-15

申请号：US13812619

申请日：2011-07-26

申请人： Jim Svensson ,  Chester Park ,  Lars Sundström ,  Leif Wilhelmsson

发明人： Jim Svensson ,  Chester Park ,  Lars Sundström ,  Leif Wilhelmsson

IPC分类号： H04B17/00

CPC分类号： H04B17/20 ,  H04B17/0085 ,  H04L27/2647 ,  H04L27/364 ,  H04L27/366

摘要： The invention proposes a way of inserting an analog test signal during normal reception into analog blocks of an OFDM receiver in such a way that the reception is either not corrupted at all, or only very little. This is achieved either by inserting the analog test signal in time or frequency where it does not corrupt the received signal, or by accounting for the interfering analog test signal in the decoding process.

摘要翻译： 本发明提出了一种在正常接收期间将模拟测试信号插入到OFDM接收机的模拟块中的方式，使得接收完全没有被破坏，或者只是很少。 这可以通过在不损坏接收信号的时间或频率插入模拟测试信号，或通过考虑解码过程中的干扰模拟测试信号来实现。

公开(公告)号：US08396168B2

公开(公告)日：2013-03-12

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：US08885783B2

公开(公告)日：2014-11-11

申请号：US13430973

申请日：2012-03-27

申请人： Chester Park

发明人： Chester Park

IPC分类号： H04L7/00 ,  H04L27/00 ,  H04W16/14 ,  H03M7/30 ,  H03M1/18 ,  H04B1/00 ,  H03M1/12

CPC分类号： H04L27/0006 ,  H03M1/124 ,  H03M1/18 ,  H03M7/30 ,  H03M7/3062 ,  H04B1/001 ,  H04W16/14

摘要： Devices and methods for iteratively sampling a wideband signal in order to recover one or more narrowband signals are disclosed. In one aspect, a wideband signal is received and the signal is sampled using a sampling device, which includes an amplifier with an initial gain level, to produce a plurality of sampled signals. A first set of narrowband signals may be recovered from the plurality of sampled signals. Then, the wideband signal is re-sampled to produce a second plurality of sampled signals. The re-sampling includes increasing the gain of the amplifier to a second level and suppressing a component of the wideband signal. A second set of narrowband signals may then be recovered from the second set of sampled signals.

摘要翻译： 公开了用于对宽带信号进行迭代采样以恢复一个或多个窄带信号的装置和方法。 在一个方面，接收宽带信号并且使用包括具有初始增益电平的放大器的采样装置对信号进行采样，以产生多个采样信号。 可以从多个采样信号中恢复第一组窄带信号。 然后，重新采样宽带信号以产生第二多个采样信号。 重采样包括将放大器的增益增加到第二电平并抑制宽带信号的分量。 然后可以从第二组采样信号中恢复第二组窄带信号。

公开(公告)号：US08798177B2

公开(公告)日：2014-08-05

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： H04K1/10 ,  H04L27/28

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：US20130028353A1

公开(公告)日：2013-01-31

申请号：US13430973

申请日：2012-03-27

申请人： Chester PARK

发明人： Chester PARK

IPC分类号： H04B1/16

CPC分类号： H04L27/0006 ,  H03M1/124 ,  H03M1/18 ,  H03M7/30 ,  H03M7/3062 ,  H04B1/001 ,  H04W16/14

摘要： Devices and methods are for iteratively sampling a wideband signal in order to recover one or more narrowband signals are disclosed. In one aspect, a wideband signal is received and the signal is sampled using a sampling device, which includes an amplifier with an initial gain level, to produce a plurality of sampled signals. A first set of narrowband signals may be recovered from the plurality of sampled signals. Then, the wideband signal is re-sampled to produce a second plurality of sampled signals. The re-sampling includes increasing the gain of the amplifier to a second level and suppressing a component of the wideband signal. A second set of narrowband signals may then be recovered from the second set of sampled signals.

摘要翻译： 装置和方法用于对宽带信号进行迭代采样，以便恢复一个或多个窄带信号。 在一个方面，接收宽带信号并且使用包括具有初始增益电平的放大器的采样装置对信号进行采样，以产生多个采样信号。 可以从多个采样信号中恢复第一组窄带信号。 然后，重新采样宽带信号以产生第二多个采样信号。 重采样包括将放大器的增益增加到第二电平并抑制宽带信号的分量。 然后可以从第二组采样信号中恢复第二组窄带信号。

公开(公告)号：US08219056B2

公开(公告)日：2012-07-10

申请号：US12553710

申请日：2009-09-03

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

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

IPC分类号： H04B17/00 ,  H04K3/00

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，选择性地接收来自与通信接收器相关联的第一本地振荡器的信号或与第二本地振荡器相关联的信号 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：US20120170629A1

公开(公告)日：2012-07-05

申请号：US12983006

申请日：2010-12-31

申请人： CHESTER PARK ,  JIM SVENSSON

发明人： CHESTER PARK ,  JIM SVENSSON

IPC分类号： H04W24/00

CPC分类号： H04L27/2659 ,  H04L27/0014 ,  H04L27/2647 ,  H04L27/28 ,  H04L2027/0026

摘要： Embodiments of user equipment and methods for determining IQ imbalance parameters are described. In some embodiments, a method for determining in-phase (I) and Quadrature (Q) imbalance (IQ imbalance) parameters based on a known signal in a dual-carrier receiver using at least one controllable frequency offset includes receiving a known signal modulated onto a first radio frequency (RF) carrier frequency and a second RF carrier frequency different than the first RF carrier frequency; downconverting the known signal to a baseband signal for the first and second carriers by conversion from the respective RF carrier frequencies to an intermediate frequency (IF) using a common RF local oscillator (LO) and by further conversion from IF to baseband using carrier specific IF LOs, wherein as a controllable frequency offset is used as a part of the conversion from at least one of RF to IF and IF to baseband through the LOs; removing any controllable frequency offset from the baseband signal for the first and second carriers to produce representations of the received signals of the first and second carriers; and deriving IQ imbalance parameters for each representation of the received signals of the first and second carriers using a least square estimate.

摘要翻译： 描述用于确定IQ不平衡参数的用户设备和方法的实施例。 在一些实施例中，基于使用至少一个可控频率偏移的双载波接收机中的已知信号来确定同相（I）和正交（Q）不平衡（IQ不平衡）参数的方法包括：接收已调制到 第一射频（RF）载波频率和与第一RF载波频率不同的第二RF载波频率; 通过使用公共RF本地振荡器（LO）从相应的RF载波频率转换到中频（IF）将已知信号下变频为第一和第二载波的基带信号，并且通过使用载波专用IF进一步从IF到基带的转换 LO，其中作为可控频率偏移用作从RF到IF和IF中的至少一个到通过LO的基带的转换的一部分; 从第一和第二载波的基带信号中去除任何可控频率偏移，以产生第一和第二载波的接收信号的表示; 以及使用最小平方估计来导出第一和第二载波的接收信号的每个表示的IQ不平衡参数。

公开(公告)号：US20120120997A1

公开(公告)日：2012-05-17

申请号：US13193041

申请日：2011-07-28

申请人： Chester PARK ,  Ali BEHRAVAN ,  Havish KOORAPATY

发明人： Chester PARK ,  Ali BEHRAVAN ,  Havish KOORAPATY

IPC分类号： H04W24/00

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0617 ,  H04B7/0626

摘要： Systems and methods according to these exemplary embodiments provide for using demodulation reference signals (DM-RSs) to obtain channel state information (CSI) for precoder selection. A method includes: receiving a DM-RS in at least one subframe, determining the CSI from the DM-RS; and using the CSI to perform at least one function.

摘要翻译： 根据这些示例性实施例的系统和方法提供使用解调参考信号（DM-RS）来获得用于预编码器选择的信道状态信息（CSI）。 一种方法包括：在至少一个子帧中接收DM-RS，从DM-RS确定CSI; 并使用CSI来执行至少一个功能。

公开(公告)号：US08947993B2

公开(公告)日：2015-02-03

申请号：US13556818

申请日：2012-07-24

申请人： Chester Park ,  Dennis Hui

发明人： Chester Park ,  Dennis Hui

IPC分类号： H04L27/26

CPC分类号： H04L27/2627 ,  H04L27/2631

摘要： Methods may be provided to transmit data from a wireless terminal operating in a radio access network. For example, sampling rate conversion may be performed on a serial stream of modulation symbols to generate sampling rate converted symbols, and the sampling rate converted symbols may be transmitted over a wireless channel to a node of the radio access network. Related terminals are also discussed.

摘要翻译： 可以提供方法来从在无线电接入网络中操作的无线终端发送数据。 例如，可以对串行调制符号流执行采样率转换以产生采样率转换的符号，并且可以通过无线信道将采样率转换的符号发送到无线电接入网络的节点。 还讨论了相关终端。

公开(公告)号：US08717927B2

公开(公告)日：2014-05-06

申请号：US13421055

申请日：2012-03-15

申请人： Chester Park

发明人： Chester Park

IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

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。