公开(公告)号：US20190353698A1

公开(公告)日：2019-11-21

申请号：US16168650

申请日：2018-10-23

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Marcus K. DaSilva ,  Chen Chang ,  Charles G. Schroeder ,  Ahsan Aziz ,  Paramjit S. Banwait

IPC: G01R31/28 ,  G01R1/04 ,  H01Q3/26

Abstract: Testing devices such as integrated circuits (IC) with integrated antennas configured for millimeter wave (mmW) transmission and/or reception. A DUT may be mounted to an interface in a measurement fixture (e.g., a socket, anechoic chamber, etc.). Power and data connections of the DUT may be tested over the interface, which may also provide connections (e.g., wired) for input/output signals, power, and control and may also provide positioning. Radio frequency (RF) characteristics of the DUT may be tested over-the-air using an array of antennas or probes in the radiating Fresnel zone of the DUT's antennas. Each of the antennas or probes of the array may incorporate a power detector (e.g., a diode) so that the RF radiating pattern may be measured using DC voltage measurements. Measured voltage measurements may be compared to an ideal signature, e.g., voltage measurements expected from an ideal or model DUT.

公开(公告)号：US09935757B2

公开(公告)日：2018-04-03

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: H04L12/50 ,  H04L5/00 ,  H04L5/14 ,  H04W72/04 ,  H04W72/08

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.

公开(公告)号：US09692586B2

公开(公告)日：2017-06-27

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 ,  H04B7/26 ,  H04L1/00 ,  H04W72/12 ,  H04L5/14

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.)