公开(公告)号：US20180159637A1

公开(公告)日：2018-06-07

申请号：US15821473

申请日：2017-11-22

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Tanim Mohammed Abu Taher ,  Ahsan Aziz ,  James W. McCoy

IPC: H04B17/12 ,  H04L25/03 ,  H04B7/0413

CPC classification number: H04B17/12 ,  H04B7/0413 ,  H04B17/14 ,  H04B17/21 ,  H04L25/0202 ,  H04L25/03012 ,  H04L25/03159 ,  H04L25/03891

Abstract: Techniques are disclosed related to calibrating and operating a multiple input multiple output (MIMO) radio system. In some embodiments, a dual mode calibration may be employed to calibrate a remote transmitter (RT). During a first, Sparse Full System Calibration (SFSC) mode, the RT may be physically connected to the MIMO radio system. In some embodiments, first and second equalizers may be derived for each of the RT and a local transmitter (LT), respectively. During a subsequent, Real-time Calibration (RTC) mode, the RT may be located remotely from the MIMO radio system, and the RT may be configured to communicate with the MIMO radio system over the air via an antenna. In the RTC mode, third equalizers may be derived for the LT. The RT may then be calibrated based on an equalizer that is derived from each of the first, second, and third equalizers. As one non-limiting example, the techniques described herein may enable real-time calibration for the RT even while the RT is located remotely from the MIMO radio system. In different embodiments, the calibration may be achieved by deriving either fractionally spaced frequency domain equalizers, or time domain equalizers.

公开(公告)号：US20170033915A1

公开(公告)日：2017-02-02

申请号：US14878645

申请日：2015-10-08

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： James W. McCoy ,  Takao Inoue ,  Jaeweon Kim

IPC: H04L5/14 ,  H04L27/00 ,  H04B1/44 ,  H04L25/08

CPC classification number: H04L5/14 ,  H03F1/3247 ,  H03F3/24 ,  H03F2200/294 ,  H03F2200/451 ,  H04B1/0475 ,  H04B1/44 ,  H04B2001/0425 ,  H04L25/08 ,  H04L27/0002 ,  H04L27/368

Abstract: Techniques are disclosed relating to use of digital predistortion in the context of full-duplex radio. In some embodiments, an apparatus includes one or more antennas and is configured to simultaneously transmit and receive wireless signals via at least partially overlapping frequency resources using the one or more antennas. In some embodiments, the apparatus includes receive chain circuitry that is configured to process both wireless signals transmitted by the apparatus via the one or more antennas and over-the-air wireless signals from one or more other computing devices. In some embodiments, the apparatus includes one or more processing elements configured to determine one or more digital predistortion parameters based on the wireless signals transmitted by the apparatus via the one or more antennas and processed by the receive chain circuitry and apply predistortion to transmitted wireless signals based on the one or more digital predistortion parameters.

Abstract translation: 公开了关于在全双工无线电的上下文中使用数字预失真的技术。 在一些实施例中，装置包括一个或多个天线，并且被配置为通过使用一个或多个天线的至少部分重叠的频率资源同时发送和接收无线信号。 在一些实施例中，该设备包括接收链路电路，其被配置为处理由设备经由一个或多个天线发送的无线信号和来自一个或多个其他计算设备的空中无线信号。 在一些实施例中，该装置包括一个或多个处理元件，其被配置为基于由装置经由一个或多个天线发送的并由接收链电路处理的无线信号来确定一个或多个数字预失真参数，并将预失真应用于所发送的无线信号 基于一个或多个数字预失真参数。

公开(公告)号：US09477386B2

公开(公告)日：2016-10-25

申请号：US14257944

申请日：2014-04-21

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Yong Rao ,  Ahsan Aziz ,  James W. McCoy

IPC: H03M1/00 ,  G06F3/0484 ,  H03K19/177 ,  H03K19/173 ,  G06F3/0481 ,  H03M1/12

CPC classification number: G06F3/04842 ,  G06F3/04817 ,  H03K19/1733 ,  H03K19/17748 ,  H03M1/1215

Abstract: Various embodiments of methods and associated devices for increasing throughput in a programmable hardware element using interleaved data converters are disclosed. A device comprising a programmable hardware element may be configured to comprise a plurality N of processing portions. The device may receive an input signal, and sample the signal in an interleaved fashion, on a per sample basis, at an effective rate K, to produce N parallel data streams. The N parallel data streams may be processed in parallel by the plurality N of processing portions. Outputs of the plurality N of processing portions may be combined to produce output data. The effective rate K and/or the number N of parallel data streams may be specified by user input. Alternatively, these values may be determined automatically. For example, the effective rate K may be determined automatically based on a bandwidth of the input signal.

Abstract translation: 公开了用于增加使用交错数据转换器的可编程硬件元件中的吞吐量的方法和相关装置的各种实施例。 包括可编程硬件元件的装置可以被配置为包括多个N个处理部分。 设备可以接收输入信号，并且以有效速率K以每个采样的方式以交织的方式对信号进行采样，以产生N个并行数据流。 N个并行数据流可以由多个处理部分并行处理。 可以组合多个N个处理部分的输出以产生输出数据。 并行数据流的有效速率K和/或数量N可以由用户输入来指定。 或者，可以自动确定这些值。 例如，可以基于输入信号的带宽自动确定有效速率K.

公开(公告)号：US20180159669A1

公开(公告)日：2018-06-07

申请号：US15886587

申请日：2018-02-01

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： MinKeun Chung ,  Jaeweon Kim ,  James W. McCoy ,  Ahsan Aziz

IPC: H04L5/00 ,  H04L5/14 ,  H04W72/08 ,  H04W72/04

CPC classification number: H04L5/006 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/0028 ,  H04L5/14 ,  H04L5/1461 ,  H04W72/0406 ,  H04W72/082

Abstract: Techniques are disclosed relating to channel quality reporting for full-duplex (FD) wireless communications. In some embodiments an apparatus (e.g., a mobile device) is configured to receive a reference signal in a wireless communication and determine one or more signal quality indicators for FD communications based on a measured SINR of the reference signal and one or more self-interference cancelation levels. The apparatus may determine the one or more self-interference cancelation levels based on the transmit power of signals transmitted by the apparatus and residual power after SIC. The SIC levels may include both analog and digital SIC levels, which may be separately determined. One or more modulation and coding schemes may be determined based on the effective SINR. In some embodiments, multiple effective SINRs are determined for multiple different transmission modulation orders used by the apparatus.

公开(公告)号：US20160352355A1

公开(公告)日：2016-12-01

申请号：US14725812

申请日：2015-05-29

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： David C. Uliana ,  James W. McCoy ,  Newton G. Petersen ,  Tai A. Ly ,  Hojin Kee ,  Adam T. Arnesen

IPC: H03M13/11 ,  G06F11/10

CPC classification number: G06F11/1008 ,  H03M13/1102 ,  H03M13/116 ,  H03M13/611 ,  H03M13/6502 ,  H03M13/6561

Abstract: Techniques are disclosed relating to implementation of LDPC encoding circuitry on a single integrated circuit (IC). In some embodiments, circuitry on a single IC includes message circuitry configured to receive or generate a message to be encoded, encode circuitry configured to perform low density parity check (LDPC) encoding on the message, noise circuitry configured to apply noise to the encoded message, and decode circuitry configured to perform LDPC decoding of the message. In some embodiments, the disclosed techniques may reduce production costs (e.g., by reducing overall chip area), facilitate LDPC testing, and/or provide multiple different functions relating to message transmission on a single chip.

Abstract translation: 公开了关于单个集成电路（IC）上的LDPC编码电路的实现的技术。 在一些实施例中，单个IC上的电路包括被配置为接收或生成要编码的消息的消息电路，被配置为对该消息执行低密度奇偶校验（LDPC）编码的编码电路，被配置为将噪声应用于编码消息的噪声电路 以及被配置为执行消息的LDPC解码的解码电路。 在一些实施例中，所公开的技术可以降低生产成本（例如，通过减少总体芯片面积），促进LDPC测试，和/或提供与单个芯片上的消息传输相关的多个不同功能。

公开(公告)号：US20150305029A1

公开(公告)日：2015-10-22

申请号：US14691339

申请日：2015-04-20

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Yong Rao ,  Ahsan Aziz ,  Eckhard Ohlmer ,  James W. McCoy

IPC: H04W72/04 ,  H04L5/22

CPC classification number: H04L5/22 ,  H04B7/2656 ,  H04L1/00 ,  H04L5/14 ,  H04W72/1242

Abstract: A flexible real-time scheduler for a wireless communication node, enabling the node to communicate with a remote node using dynamically variable frame structure. The scheduler continuously receives map information defining the frame structure of frames in a frame sequence. Each frame includes a plurality of slots (e.g., time slots or frequency slots). The map information specifies for each slot of each frame whether the slot is to be a transmit slot or a receive slot. The scheduler drives a transmitter to transmit during the slots assigned for transmission, and drives a receiver to receive during the slots assigned for reception. (The number of slots per frame and the size of each slot are also configurable.)

Abstract translation: 用于无线通信节点的灵活的实时调度器，使节点能够使用动态可变的帧结构与远程节点进行通信。 调度器连续地接收定义帧序列中的帧的帧结构的映射信息。 每个帧包括多个时隙（例如，时隙或频率时隙）。 映射信息为每个帧的每个时隙指定时隙是发送时隙还是接收时隙。 调度器驱动发射机在分配用于传输的时隙期间进行传输，并且在分配给接收的时隙期间驱动接收机接收接收机。 （每帧的插槽数量和每个插槽的大小也可以配置。）

公开(公告)号：US10181913B2

公开(公告)日：2019-01-15

申请号：US15821473

申请日：2017-11-22

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Tanim Mohammed Abu Taher ,  Ahsan Aziz ,  James W. McCoy

IPC: H04B17/12 ,  H04L25/03 ,  H04B7/0413 ,  H04B17/21 ,  H04L25/02 ,  H04B17/14

Abstract: Techniques are disclosed related to calibrating and operating a multiple input multiple output (MIMO) radio system. In some embodiments, a dual mode calibration may be employed to calibrate a remote transmitter (RT). During a first, Sparse Full System Calibration (SFSC) mode, the RT may be physically connected to the MIMO radio system. In some embodiments, first and second equalizers may be derived for each of the RT and a local transmitter (LT), respectively. During a subsequent, Real-time Calibration (RTC) mode, the RT may be located remotely from the MIMO radio system, and the RT may be configured to communicate with the MIMO radio system over the air via an antenna. In the RTC mode, third equalizers may be derived for the LT. The RT may then be calibrated based on an equalizer that is derived from each of the first, second, and third equalizers. As one non-limiting example, the techniques described herein may enable real-time calibration for the RT even while the RT is located remotely from the MIMO radio system. In different embodiments, the calibration may be achieved by deriving either fractionally spaced frequency domain equalizers, or time domain equalizers.

公开(公告)号：US20180159640A1

公开(公告)日：2018-06-07

申请号：US15821270

申请日：2017-11-22

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Tanim Mohammed Abu Taher ,  Malik Muhammad Usman Gul ,  Ahsan Aziz ,  James W. McCoy

IPC: H04B17/21 ,  H04B7/0413 ,  H04L25/02 ,  H04L25/03

Abstract: Techniques are disclosed related to calibrating and operating a multiple input multiple output (MIMO) radio system. Some embodiments comprise a method wherein a single calibration signal is used to calibrate a MIMO radio system by performing each of time synchronization, phase synchronization, and frequency response correction for multiple receivers. In different embodiments, the calibration may be achieved by deriving either a fractionally spaced frequency domain equalizer, or a time domain equalizer.

公开(公告)号：US09860052B2

公开(公告)日：2018-01-02

申请号：US14878645

申请日：2015-10-08

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： James W. McCoy ,  Takao Inoue ,  Jaeweon Kim

IPC: H04L1/00 ,  H04L5/14 ,  H04L25/08 ,  H04L27/00 ,  H04B1/44 ,  H04L27/36

CPC classification number: H04L5/14 ,  H03F1/3247 ,  H03F3/24 ,  H03F2200/294 ,  H03F2200/451 ,  H04B1/0475 ,  H04B1/44 ,  H04B2001/0425 ,  H04L25/08 ,  H04L27/0002 ,  H04L27/368

Abstract: Techniques are disclosed relating to use of digital predistortion in the context of full-duplex radio. In some embodiments, an apparatus includes one or more antennas and is configured to simultaneously transmit and receive wireless signals via at least partially overlapping frequency resources using the one or more antennas. In some embodiments, the apparatus includes receive chain circuitry that is configured to process both wireless signals transmitted by the apparatus via the one or more antennas and over-the-air wireless signals from one or more other computing devices. In some embodiments, the apparatus includes one or more processing elements configured to determine one or more digital predistortion parameters based on the wireless signals transmitted by the apparatus via the one or more antennas and processed by the receive chain circuitry and apply predistortion to transmitted wireless signals based on the one or more digital predistortion parameters.

公开(公告)号：US20170141886A1

公开(公告)日：2017-05-18

申请号：US14941158

申请日：2015-11-13

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： MinKeun Chung ,  Jaeweon Kim ,  James W. McCoy ,  Ahsan Aziz

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04L5/14

CPC classification number: H04L5/006 ,  H04L1/0003 ,  H04L1/0026 ,  H04L5/14 ,  H04L5/1461 ,  H04W72/0406 ,  H04W72/082

Abstract: Techniques are disclosed relating to channel quality reporting for full-duplex (FD) wireless communications. In some embodiments an apparatus (e.g., a mobile device) is configured to receive a reference signal in a wireless communication and determine an effective signal to interference plus noise ratio (SINR) for FD communications based on a measured SINR of the reference signal and one or more self-interference cancelation levels. The apparatus may determine the one or more self-interference cancelation levels based on the transmit power of signals transmitted by the apparatus and residual power after SIC. The SIC levels may include both analog and digital SIC levels, which may be separately determined. One or more modulation and coding schemes may be determined based on the effective SINR. In some embodiments, multiple effective SINRs are determined for multiple different transmission modulation orders used by the apparatus.