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National Instruments Corporation
National Instruments Corporation_20131212

National Instruments Corporation patents


Recent patent applications related to National Instruments Corporation. National Instruments Corporation is listed as an Agent/Assignee. Note: National Instruments Corporation may have other listings under different names/spellings. We're not affiliated with National Instruments Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "N" | National Instruments Corporation-related inventors


Intra-node channel reciprocity compensation for radio access in mimo wireless communication systems

A wireless cellular base station includes M antennas and one or more processing devices. For each antenna, the antenna transmits a calibration pilot symbol over the air and the other M−1 antennas receive the calibration pilot symbol over the air. The processing devices select one of the M antennas as... National Instruments Corporation

Ue-aided channel reciprocity compensation for radio access in mimo wireless communication systems

A wireless cellular base station (BS) transmitter transmits a downlink calibration pilot symbol. A receiver receives from a user equipment (UE) an uplink calibration pilot symbol and an effective downlink channel estimate transmitted by the UE. The effective downlink channel estimate is computed by the UE using the downlink calibration... National Instruments Corporation

Radio frequency (rf) communication systems using rf switching guard periods to transmit special symbols in block symbol transmissions

An apparatus includes circuitry that processes a subframe as part of a time-domain signal frame structure used for radio frequency communications. The subframe includes a plurality of block symbols each having an associated time-domain guard period and one or more radio frequency (RF) switching guard periods. Each block symbol of... National Instruments Corporation

Soft front panel for concurrent radio frequency measurements

Methods and measurements systems are disclosed relating to use of a soft front panel (SFP) to display results of measurement functions. A measurement device may concurrently perform two or more measurement functions to produce two or more respective signal measurements, wherein each measurement function comprises an acquisition function and a... National Instruments Corporation

Spectral stitching method to increase instantaneous bandwidth in vector signal analyzers

Various embodiments are described of devices and associated methods for processing a signal using a plurality of vector signal analyzers (VSAs). An input signal may be split and provided to a plurality of VSAs, each of which may process a respective frequency band of the signal, where the respective frequency... National Instruments Corporation

Nyquist and square root nyquist filters for pulse shaping in wireless communications

Nyquist filters for pulse shaping and related matched filters in wireless communications are disclosed that provide improved performance. The disclosed embodiments recognize that the second derivative of the raised cosine function is discontinuous in the frequency domain and that the first derivative of the square root raised cosine is discontinuous... National Instruments Corporation

Linear programming formulation for incremental layout in a graphical program

Various embodiments of a system and method for a linear programming formulation for incremental layout for a graph in a graphical program are described. A graphical programming development environment or other software application may be operable to automatically analyze a block diagram of a graphical program, e.g., in order to... National Instruments Corporation

Automatically mapping program functions to distributed heterogeneous platforms based on hardware attributes and specified constraints

A method for automatically mapping program functions to distributed heterogeneous platforms based on hardware attributes and specified constraints is disclosed. The method includes receiving a plurality of program functions and determining constraint information for each. The method further includes determining attributes of a plurality of hardware processing elements, wherein ones... National Instruments Corporation

Determination of timing configurations for program dataflow models

A method for determining timing constraints in dataflow models is disclosed. The method includes receiving node information specifying a plurality of dataflow nodes, as well as coupling between various ones of the dataflow nodes. The method further comprising receiving timing information specifying timing constraints for at least some of the... National Instruments Corporation

Unified flexible radio access technology (rat) for 5g mobile communication systems

Embodiments are disclosed for a new unified and flexible frame structure for 5G (5th generation) mobile telecommunications standard and related radio access technology (RAT). The disclosed embodiments use communication frames with multiple partition types and are able to span a wide range of 5G deployment scenarios in a flexible and... National Instruments Corporation

Zero ripple fan noise suppression

A fan noise suppression circuit may be coupled between a power source and a power input to at least one fan. The fan noise suppression circuit may include an adjustable current source coupled to the power source. The adjustable current source may provide a voltage output and a current output... National Instruments Corporation

Channel sounding techniques

Techniques are disclosed relating to channel sounding. In some embodiments a transmitter transmits a periodic CAZAC sequence beginning at a point in time that corresponds to a timing signal (e.g., a pulse-per-second signal). In some embodiments, a receiver waits to begin processing received sequences for a time interval corresponding to... National Instruments Corporation

I/q modulator and demodulator with wide instantaneous bandwidth and high local-oscillator-port-to-radio-frequency-port isolation

An improved quadrature modulator/demodulator (IQMD) may use two-phase quadrature local oscillator (LO) signal generation for generating 0° and 90° LO signals, and an anti-phase combiner/divider (at 0° and 180°) on the RF (radio frequency) port. The IQMD may include mixers (which may be double-balanced passive mixers) that function as downconverters... National Instruments Corporation

Digitally compensating for the impact of input bias current on current measurements

A source-measure unit (SMU) may be implemented with digital control loops and circuitry to digitally compensate for the impact of input bias current on current measurements. One or more buffers having well-defined characteristics with respect to certain parameters which may affect the current measurements may be used in the output... National Instruments Corporation

Flexible polynomial-based interleaver

Techniques are disclosed relating to circuitry configured to interleave data, e.g., for use to process error correcting codes for wireless data transmission. In some embodiments an apparatus includes one or more circuit elements configured to receive input data samples, a plurality of polynomial coefficients, a start index, and information indicating... National Instruments Corporation

Spectral stitching method to increase instantaneous bandwidth in vector signal generators

Embodiments are described of devices and methods for processing a signal using a plurality of vector signal generators (VSGs). A digital signal may be provided to a plurality of signal paths, each of which may process a respective frequency band of the signal, the respective frequency bands having regions of... National Instruments Corporation

Digital approach to the removal of ac parasitics for impedance measurements

An improved measurement system may include a source measure unit (SMU) capable of performing accurate low-level current measurements. Based on an SMU design that provides a controlled DC voltage source with precision current limiting and a controlled 0V (zero Volt) DC at the measurement terminal, an AC design may be... National Instruments Corporation

Channel quality reporting for full-duplex radio

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... National Instruments Corporation

Replication structure in a graphical programming language

System and method for creating a graphical program. A first replication structure may be included in a graphical program, where the first replication structure specifies replication of any graphical program code inside the first replication structure. First graphical program code may be included inside the first replication structure. An implementation... National Instruments Corporation

Value transfer between program variables using dynamic memory resource mapping

System and method for creating a program. A program may be compiled, including determining one or more value transfer operations in the program. Each value transfer operation may specify a value transfer between a respective one or more source variables and a destination variable. For each of the one or... National Instruments Corporation

Debugging parallel graphical program code

System and method for debugging a graphical program. A graphical program may be received, e.g., from storage, from another process or device, etc. The program includes parallel graphical program portions, each portion including a graphical program structure and/or an execution path in the graphical program. A first graphical program portion... National Instruments Corporation

Self-addressing memory

Techniques are disclosed relating to self-addressing memory. In one embodiment, an apparatus includes a memory and addressing circuitry coupled to or comprised in the memory. In this embodiment, the addressing circuitry is configured to receive memory access requests corresponding to a specified sequence of memory accesses. In this embodiment, the... National Instruments Corporation

Configurable input/output sub-channels for optimized diagnostics

A novel diagnostics and verifiable input/output (DVIO) channel may reduce fixed diagnostic circuitry and allow standard input/output channels to be repurposed as diagnostics for specific deployments. The DVIO channel may include a digital input sub-channel and a digital output sub-channel, with each sub-channel including basic protection and diagnostic circuitry for... National Instruments Corporation

I/q modulator and demodulator with wide instantaneous bandwidth and high local-oscillator-port-to-radio-frequency-port isolation

An improved quadrature modulator/demodulator (IQMD) may use two-phase quadrature local oscillator (LO) signal generation for generating 0° and 90° LO signals, and an anti-phase combiner/divider (at 0° and 180°) on the RF (radio frequency) port. The IQMD may include mixers (which may be double-balanced passive mixers) that function as downconverters... National Instruments Corporation

Scalable massive mimo

Techniques are disclosed relating to massive MIMO communications. In some embodiments, a base station is configured to dynamically adjust the number of processing elements used for MIMO signal estimation (e.g., the number of MIMO RX chains used for parallel processing). In some embodiments, the number of processing elements may be... National Instruments Corporation

Spectral stitching method to increase instantaneous bandwidth in vector signal analyzers

Various embodiments are described of devices and associated methods for processing a signal using a plurality of vector signal analyzers (VSAs). An input signal may be split and provided to a plurality of VSAs, each of which may process a respective frequency band of the signal, where the respective frequency... National Instruments Corporation

Correlation analysis of program structures

System and method for performing correlation analysis. A program that includes multiple program structures and one or more data objects is stored. Each data object is shared by at least two of the program structures. For each program structure, decomposition effects on each of the data objects shared by the... National Instruments Corporation

Automatically determining and indicating system positions of devices in a hierarchical bus networked system

System and method for determining and conveying connectivity of cabled computer peripherals to a user. Characteristic information regarding each of multiple devices connected to a computer system in a system hierarchy of a bus networked system may be stored, including a device hierarchy associated with each device that identifies respective... National Instruments Corporation

Digital predistortion for full-duplex radio

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... National Instruments Corporation








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