Abstract: The described technology is generally directed towards scheduling, by a distributed unit, the injection of custom traffic (signals/data) into a radio unit communications path. The distributed unit coordinates with the radio unit to schedule and synchronize such custom traffic in unscheduled (physical resource block), such as interleaved with to live-air and non-live-air traffic. The radio unit can request the unscheduled physical resource blocks for custom traffic to be inserted by the radio unit. Alternatively, the distributed unit can inject the custom traffic in otherwise unscheduled physical resource blocks for sending to the radio unit. The custom traffic is configured to perform some action by the radio unit, such as to perform antenna calibration, to perform test and measurement operations to obtain performance data, and the like. Performance data can be used, for example, to modify operating parameters of the radio unit to improve performance of the radio unit.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for base station antenna calibration. A method is implemented in a base station for a cellular communications system. The method includes configuring a user equipment, UE, for a plurality of channel state information, CSI, reports associated to respective CSI reporting bands, the respective CSI reporting bands being either: (a) different subsets of sub-bands within a downlink bandwidth of the base station or (b) different downlink bandwidth parts served by the base station; receiving the CSI reports from the UE; estimating phase and delay errors for a plurality of transmit antenna branches of the base station; compensating for the estimated phase and delay errors for the transmit antenna branches based on the CSI reports received from the UE; and transmitting a downlink signal while compensating for the estimated phase and delay errors for the transmit antenna branches of the base station.

Abstract: The method of the invention is related to utilizing the convergence patterns of sparse coding for detecting a primary user emulation/signal jamming attack in a cognitive radio setting. The method basically comprises a training stage and a testing stage. Through the method, the hypothesis which shows that there is no primary user but only noise (H0), the hypothesis which shows that there is a legitimate primary user present with a right to use the spectrum and the secondary user should not use the spectrum (H1), and the hypothesis which shows that there is a primary user emulator/signal jammer in the environment (H2) can be distinguished.

Abstract: An apparatus, comprising: means for obtaining radio environment information related to at least one downlink signal received by a user equipment using at least one currently-active reception antenna panel of a plurality of selectively-activatable reception antenna panels; and means for reconfiguring at least one of the plurality of selectively-activatable reception antenna panels to be used for performing radio measurements of a downlink signal to be one of active and inactive in response to a variation in the radio environment information.

Abstract: Apparatuses, systems, and methods for beam indication latency reduction via symbol level beam sweeping capability reporting. A wireless device may transmit, to a base station, a report associated with symbol level beam sweeping. The wire wireless device may receive, from the base station, a symbol level beam sweeping configuration. The symbol level beam sweeping configuration may be based, at least in part, on the report. The wireless device may perform synchronization signal block (SSB) measurements according to the report and the symbol level beam sweeping configuration.

Abstract: A method for designing a low-complexity linear minimum mean squared error (LMMSE) and zero-forcing (ZF) receivers for MIMO-RCP-OTFS system is disclosed. The method includes steps of: computing a received signal vector (r) and structure of a matrix (?) using a channel matrix (H); reordering the matrix (?) to reduce bandwidth of the matrix (?); computing inverse of a banded matrix (G=LU) by multiplying the matrix (?) with permutation matrix (P) and with transpose of permutation matrix (PT) using Cholskey decomposition; calculating LMSSE/ZF equalized vector ({tilde over (r)}ce) by multiplying inverse of banded matrices with Bw bandwidth (L and U), with the received signal vector (r=Pr) using forward and backward substitution algorithms; reordering the vector ({tilde over (r)}ce) to calculate vector (y); and calculating data vector ({circumflex over (d)}) representing an estimation of low-complexity LMMSE/ZF equalization by multiplying Hermitian matrix (B) with the vector (y).

Abstract: A system includes a plurality of controllers associated with the plurality of units of building equipment, each controller comprising a plurality of communication ports, a plurality of cables connected to the plurality of communication ports and linking together the plurality of controllers, wherein the plurality of controllers are configured to self-identify a break in a connection between two the plurality of controllers by monitoring statuses of the plurality of communication ports. The system also includes circuitry configured to receive a signal indicative of the order of the connections between the plurality of controllers from the plurality of controllers, generate a graphical map of the order of the connections between the plurality of controllers based on the signal, receive, from the plurality of controllers, an indication of a break in a connection between two of the plurality of controllers, and update the graphical map to indicate the connection as broken.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a network entity may support communication of a compressed channel state information (CSI) feedback. The UE and the network entity may use closed-loop feedback to improve beamforming tracking accuracy. For example, the UE may receive a CSI reference signal (CSI-RS) that is beamformed based on a channel estimate of a sounding reference signal (SRS) or a previous CSI feedback, or both. The UE may transmit a feedback message including compressed CSI that is generated through encoding a measurement of the CSI-RS. The compressed CSI may be generated based on a predicted channel estimate at the network entity, determined based on the channel estimate of the SRS or the previous CSI feedback.

Abstract: Methods and apparatus for combining received uplink transmissions. In an embodiment, a method is provided that includes receiving a descrambled resource element associated with selected second channel state information (CSI2) and receiving a descrambling sequence used to generate the descrambled RE. The method also includes rescrambling the descrambled RE using the descrambling sequence to generate a rescrambled RE and modifying the descrambling sequence to generate a modified descrambling sequence. The method also includes descrambling the rescrambled RE with the modified descrambling sequence to generate a modified descrambled RE and accumulating the modified descrambled RE to form a combined CSI2 value.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may measure a beam, according to a measurement configuration, to determine a channel condition value of the beam, modify the channel condition value based at least in part on at least one of one or more beam characterizations, a derivation of a beamforming gain value, or an estimation of the beamforming gain value, and transmit, to a base station, a measurement report indicating the modified channel condition value. Numerous other aspects are provided.

Abstract: Antenna monitoring systems and methods can include, among other things, a transmitter near each of the antennas in a distributed antenna system (DAS). The transmitter can transmit an antenna identifier corresponding to that antenna, so that the various transmitters in the DAS each transmit different antenna identifiers. These antenna identifiers can be detected by a receiver and can be processed to determine whether any antenna identifiers are missing. If any expected antenna identifier is missing, the receiver can infer that the antenna or a component associated with the antenna (such as cabling) may have failed. The receiver can then output an indication or notification that may be accessed by maintenance personnel and/or emergency personnel to enable them to identify and repair the non-functioning antenna or component. The transmitter can transmit other data, such as environmental data, RF data, or the like, to facilitate additional or alternative monitoring functionality.

Abstract: An antenna test system for testing an antenna with a plurality of antenna elements is disclosed.

Abstract: Methods, systems, and devices for wireless communications are described. A device may include an energy harvesting circuit configured to convert radio frequency energy associated with signals detected by the device to direct current (DC) energy for storage at the device. The device may additionally include a signal decoding circuit configured to decode the signals detected by the device to identify transmissions from other devices in the wireless communications system. The device may rely on power splitting or time switching to direct radio frequency energy to both the energy harvesting circuit and signal decoding circuit of the device. The device may employ various methods for channel estimation, channel reporting, and communications with another device based on utilizing power splitting or time switching to both perform energy harvesting and signal decoding.

Abstract: Various aspects of the present disclosure generally relate to neural network based channel state information (CSI) feedback. In some aspects, a device may obtain a CSI instance for a channel, determine a neural network model including a CSI encoder and a CSI decoder, and train the neural network model based at least in part on encoding the CSI instance into encoded CSI, decoding the encoded CSI into decoded CSI, and computing and minimizing a loss function by comparing the CSI instance and the decoded CSI. The device may obtain one or more encoder weights and one or more decoder weights based at least in part on training the neural network model. Numerous other aspects are provided.

Abstract: A base station (BS) can include a site-specific and dynamic codebook design. The BS includes an antenna and a transceiver coupled to the antenna and configured to communicate via a wireless communication medium. The BS also includes a processor coupled to the transceiver. The processor is configured to: receive, from a user equipment (UE), a measurement report comprising a best beam index and a corresponding received power; estimate a UE channel including a path gain and angle of departure; update the site-specific codebook based on the estimated UE channel; and transmit control and data signals to the UE using the updated site-specific codebook.

Abstract: The present disclosure provides a method (100) in a network device for channel estimation. The method (100) includes: transmitting (110) to a terminal device an instruction to precode each of a number, L, of DeModulation Reference Signals, DMRSs, using a number, N, of linearly independent precoders, respectively; receiving (120) from the terminal device L*N precoded DMRSs; estimating (130) an equivalent channel associated with an uplink channel from the terminal device to the network device based on one or more of the L*N precoded DMRSs; and determining (140) the uplink channel from the equivalent channel based on the N precoders.

Abstract: A receiving device includes a reception unit that samples a sample signal from a DUT 2; an FFT processing unit 21 that performs an FFT process by multiplying the sample signal by a window function; an FFT length setting unit 34 that, when the signal length of the signal to be measured is shorter than the first FFT length conforming to the communication standard, instead of the first FFT length, sets a second FFT length shorter than the signal length of the signal to be measured, as an FFT length of the FFT process; and a window function setting unit 35 that, when the signal length of the signal to be measured is shorter than the first FFT length, instead of a first window function, sets an asymmetric second window function having a peak separated from a center of a window section, as the window function.

Abstract: Provided are a method and apparatus for selecting a resource. The method for selecting the resource includes: receiving, by a user equipment (UE), a transmission configuration indicator (TCI) state of a downlink configured by a network side device, where the TCI state at least includes: multiple pieces of Quasi co-location (QCL) information, and the multiple pieces of QCL information at least includes: a reference signal (RS) and a QCL type corresponding to the RS; and selecting, by the UE, an RS to perform radio link monitoring (RLM) according to at least one of the RS or the QCL type. Further provided are a storage medium and an electronic apparatus.

Abstract: A base station can operate a first serving cell on a licensed carrier frequency and a second serving cell on an unlicensed carrier frequency. The base station can perform a listen before talk (LBT) on the unlicensed carrier frequency for a first time duration. The base station can determine that the unlicensed carrier frequency is free. The base station can transmit an activation command on the first serving cell for receipt by a UE, the activation command being configured to activate the UE to receive transmissions from the base station on the second serving cell. The base station can transmit after determining that the unlicensed carrier frequency is free, a reserve transmission on the unlicensed carrier frequency at least until the base station begins transmission of the activation command on the first serving cell.

Abstract: In multi-beam communication, the UE may assist in the scheduling of beams utilized during the multi-beam communication by improving the manner in which the quality of the beam is reported to the network. The apparatus may measure a signal received from a base station on at least one beam. The apparatus may detect a triggering event for providing CSI for the at least one beam. The apparatus may transmit an uplink transmission comprising a CSI report in response to detecting the triggering event. The apparatus may receive an uplink request from a UE for providing CSI for at least one beam. The apparatus may transmit an indication scheduling a CSI report in response to the uplink request. The apparatus may receive an uplink transmission from the UE comprising the CSI report for the at least one beam.

Abstract: In the present invention, in classifying modulation types of a plurality of modulation signals by using a classifier (an artificial neural network model based on machine learning), the classifier may classify the modulation types of the modulation signals by using pieces of I/Q data, sampled with one sampling frequency, as input data, and thus, may quickly classify the modulation signals.

Abstract: A sensor includes a sensing element to produce a sensing element signal and a processor responsive to the sensing element signal to generate a sensor output signal comprising a Single Edge Nibble Transmission (SENT) frame. The SENT frame includes a Status and Communication (SCN) nibble comprising a bit 0 and a bit 1 that represent a status of at least one internal diagnostic indicator and a plurality of data nibbles. At least one of the plurality of data nibbles includes a cyclic redundancy check (CRC), the CRC being an encoding of the bit 0 and the bit 1 of the SCN nibble and the plurality of data nibbles and at least one of the plurality of data nibbles includes a count that indicates a new frame, the CRC being at least a five bit value.

Abstract: The present invention relates to a method and apparatus for detecting a signal propagation type, the method comprises: when a positioning base station of an ultra-wideband positioning system currently receives a pulse response from a positioning tag, computing an actual value of a specified feature of the received pulse response at least using the received pulse response; selecting, for the specified feature, a predictive model for predicting an adopted value of the specified feature at a future moment on the basis of an adopted value of the specified feature at a historical moment; using the predictive model selected for the specified feature to acquire an adopted value of the specified feature at a future moment, to serve as a predicted value of the specified feature of the received pulse response; and determining the current type of signal propagation between the positioning base station and positioning tag on the basis of the actual value and predicted value of the specified feature of the received pulse

Abstract: Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

Abstract: An example operation may include one or more of receiving a data file comprising a list of interactive voice response (IVR) prompts, identifying a set of IVR prompts within the received data file that are included within a common sequence, assembling text content from each IVR prompt in the set of IVR prompts within the common sequence into a string of text content, and modifying the data file to include the assembled string of text content within a field of the modified data file.

Abstract: Novel tools and techniques are provided for remotely configuring and orchestrating multifunctional cloud devices located on customer premises, in some cases, using a smart cloud adaptive device. In some embodiments, the smart cloud adaptive device, which might have one or more wireless programmable radios configured to communicate with a network termination device, might communicate with a cloud configuration server over a network via the one or more wireless programmable radios (and, in some embodiments, through the network termination device). The smart cloud adaptive device might transmit device identification information associated with a customer and/or service codes indicative of services to be provided to the customer. The smart cloud adaptive device might receive one or more configuration files from the cloud configuration server based on the service codes, and enable functionality among a plurality of functionalities to provision the services, based on the one or more configuration files.

Abstract: This disclosure relates to an intelligent smart glasses that may be worn by a customer. The smart glasses may sense cash information on automated teller machine (“ATM”). The smart glasses may accordingly split up a cash transaction across various ATM units in close to proximity to the customer. The smart glasses may split a requested cash transactions among various ATMs so that if the desired amount/denomination of cash is not available at an ATM to the customer, the customer is seamlessly directed to one or more other ATMs that are capable of dispensing the desired amount of cash.

Abstract: A method for operating a data interface circuit whereby calibration adjustments for data bit capture are made without disturbing normal system operation includes initially establishing, using a first calibration method where a data bit pattern received by the data interface circuit is predictable, an optimal sampling point for sampling data bits received by the data interface circuit, and during a normal system operation and without disturbing the normal system operation, performing a second calibration method where the data bit pattern received by the data interface circuit is unpredictable. The second calibration method determines an amount of a timing drift for received data bit edge transitions and adjusts the optimal timing point determined by the first calibration method to create a revised optimal timing point. The second calibration method samples fringe timing points associated with the transition edges of a data bit.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a request to use a preferred number of transmission configuration indicator (TCI) states for communications with one or more base stations. The UE may receive an indication to use a number of TCI states based at least in part on the request. Numerous other aspects are described.

Abstract: A function resource configuration method includes receiving, by a wearable device, a distribution request sent by a first terminal, where the distribution request is used to request the wearable device to distribute a first function resource of the wearable device to the first terminal, and where the first function resource is already occupied by a second terminal. The wearable device determines, based on the distribution request, whether to allow the first terminal to use the first function resource. If the wearable device allows the first terminal to use the first function resource, the wearable device sends a notification message to the first terminal that instructs the first terminal to use the first function resource.

Abstract: A method of beamforming calibration is disclosed for a multi-antenna transceiver configured to communicate with one or more other transceivers. The multi-antenna transceiver has a plurality of transceiver chains connectable to respective antenna elements of the multi-antenna transceiver. Each transceiver chain comprises a transmitter path and a receiver path. The method comprises (for each transceiver chain) feeding an analog signal from the transmitter path to the receiver path via connection circuitry between the transmitter path and the receiver path to provide a digital calibration signal, and determining a beamforming calibration factor for the transceiver chain based on the digital calibration signal. Corresponding apparatus, multi-antenna transceiver, wireless communication node, and computer program product are also disclosed.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may measure, using one or more receive beams, a channel state information reference signal (CSI-RS) transmitted on a transmit beam of the CSI-RS according to a beam management configuration for periodic CSI-RSs, where the UE performs measurements according to a static beam sweeping schedule or a dynamic beam sweeping schedule associated with the transmit beam of the CSI-RS based at least in part on the beam management configuration. In some aspects, the UE may transmit a measurement report indicating one or more measurements of the CSI-RS based at least in part on measuring the CSI-RS. Numerous other aspects are provided.

Abstract: A data transmission method and an apparatus are provided. The method includes: determining, by a base station, a time-domain interval of available time-frequency resources in an unlicensed spectrum, where the available time-frequency resources are continuous time-frequency resources in a time domain; sending, by the base station, a preamble signal in a first subframe in the interval, where the first subframe is an initial subframe in the interval; and sending, by the base station, downlink control information and data after sending the preamble signal, where the data is in the first subframe, the downlink control information includes scheduling indication information, and the scheduling indication information is used to indicate a frequency-domain location of the data. According to the present invention, spectrum utilization can be improved.

Abstract: An error rate measuring apparatus includes an operation unit that sets a codeword length and an FEC symbol length, a display unit that displays bit string data obtained by converting a signal from a device under test, a codeword position calculation means for calculating a codeword head position from the FEC symbol length, codeword head symbol information, and an FEC symbol position, calculating codeword position information of a zeroth address of a display screen from the codeword head position, the codeword length, and the FEC symbol length, and calculating position information of a codeword at a currently selected position of a cursor from the codeword position information of the zeroth address of the display screen, the codeword length, the FEC symbol length, and a position of the cursor on the display screen, and display control means for displaying the calculated position information of the codeword on the display screen.

Abstract: A radio node is configured for use in a wireless communication system. The radio node in this regard is configured to transmit a signal that is punctured by another signal to another radio node. The radio node is also configured to estimate a probability of decoding failure that characterizes a likelihood that the another radio will fail to decode the punctured signal. The radio node is further configured to retransmit at least a punctured portion of the punctured signal if the estimated probability is above a threshold.

Abstract: A system may include a transmitter node and a receiver node. Each node may include a communications interface including at least one antenna element and a controller operatively coupled to the communications interface, the controller including one or more processors. Each node may be time synchronized to apply Doppler corrections to said node's own motions relative to a stationary common inertial reference frame. The stationary common inertial reference frame may be known to the transmitter node and the receiver node prior to the transmitter node transmitting signals to the receiver node and prior to the receiver node receiving the signals from the transmitter node.

Abstract: Systems, devices, methods, and computer-readable media for spread spectrum (SS) receiver interference mitigation are presented. An interference mitigation unit can include an interference analyzer that receives a complex-valued signal and estimates statistical characteristics of at least a portion of the complex-valued signal, a unit controller that receives the estimated statistical characteristics from the interference analyzer, classifies the interference distribution based on statistical characteristics as a Gaussian, long-tail, or short-tail, selects a non-linearity for that distribution, and a programmable non-linear module that performs a non-linear functional conversion of an envelope of the received complex-valued signal using a non-linear input-output characteristic based on the classification by the unit controller.

Abstract: A function resource configuration method includes receiving, by a wearable device, a distribution request sent by a first terminal, where the distribution request is used to request the wearable device to distribute a first function resource of the wearable device to the first terminal, and where the first function resource is already occupied by a second terminal. The wearable device determines, based on the distribution request, whether to allow the first terminal to use the first function resource. If the wearable device allows the first terminal to use the first function resource, the wearable device sends a notification message to the first terminal that instructs the first terminal to use the first function resource.

Abstract: Example methods and devices are disclosed. One example method includes receiving, by a first device, configuration information from a second device, where the configuration information is used by the first device to report information about an association relationship between a zero power-reference signal resource and a non-zero power-reference signal resource. The first device can then report the information about the association relationship based on the configuration information.

Abstract: An eye diagram is generated for a digital interface, such as a Serializer/Deserializer (SerDes) interface. A probability map is captured by stepping through a fixed sequence of phase and reference voltage levels and counting a number of highs or lows. The switching of phase includes merely increasing the phase difference rather than performing complex phase/data analysis. The probability map can then be used to generate an eye diagram through simple differentiation. For example, the differentiation between various pixel locations in the probability map can be used to yield the edges of the eye in an eye diagram. The standard Serdes parameters can then be extracted from the eye diagram. The parameters can then be used to determine if the serial connection is problematic.

Abstract: Enhanced channel state information (CSI) feedback is disclosed for full dimensional multiple input, multiple output (FD-MIMO) operations. In one aspect, a single CSI process is defined that is configured with an azimuth and elevation CSI-reference signal (RS) ports. A user equipment (UE) will send a precoding matrix indictor (PMI) report including a precoding matrix indicator (PMI) for the azimuth ports and a PMI for the elevation ports. One of the PMIs is assigned a low rank. The base station will use the two PMIs to create a whole channel precoding matrix. In another aspect, a single CSI process is configured having a plurality of CSI-RS resources. The UE generates channel measurement information for each of the CSI-RS resources, but only sets a CSI report to the base station of a subset of the total number of resources.

Abstract: Aspects of the subject disclosure may include, a system that facilitates receiving a first electromagnetic wave propagating along a transmission medium, detecting, according to the first electromagnetic wave, an obstruction on a first portion of an outer surface of the transmission medium, responsive to the detecting the obstruction, configuring a material to have similar properties to the obstruction, the material being positioned along a second portion of the outer surface of the transmission medium, and generating a second electromagnetic wave that propagates along the transmission medium without relying on an electrical return path to facilitate propagation of the second electromagnetic wave along the transmission medium, the material facilitating propagation of the second electromagnetic wave from the second portion of the outer surface of the transmission medium to the first portion of the transmission medium affected by the obstruction. Other embodiments are disclosed.

Abstract: A time synchronization method, applied to a power-line communication (PLC) network that includes a head end node and at least one tail end node coupled to the head end node. The method includes the head end node generates data about voltage zero-crossing points based on reference time, where the data about the voltage zero-crossing points includes zero-crossing time points of the voltage zero-crossing points. When a first timing point arrives, the head end node sends first information to the tail end node, where the first information includes a timestamp of a first zero-crossing point, the first zero-crossing point is a voltage zero-crossing point closest to the first timing point, and the timestamp of the first zero-crossing point is used by the tail end node to determine a zero-crossing time point of a second zero-crossing point.

Abstract: Disclosed are a method and apparatus for measuring wireless performance of a receiver of a wireless terminal, and a non-transitory computer readable storage medium. The method includes the following. A measured signal of a receiver to be measured is determined. Measured signals of other receivers except the receiver to be measured are zero. Multiple transmitted signals are determined based on the measured signals. The multiple transmitted signals are transmitted through multiple measurement antennas. When a bit error rate of the receiver to be measured does not equal a preset bit error rate, the measured signal is adjusted, determining the multiple transmitted signals based on the updated measured signal. When the bit error rate equals the preset error rate, a power of the measured signal is determined as the radiant sensitivity of the receiver to be measured.

Abstract: A non-AP/PCP communication apparatus comprises: a receiver which receives a measurement request which is transmitted from an AP/PCP communication apparatus and which requests measurement used in SPSH executability determination; and a transmitter which transmits to the AP/PCP communication apparatus the result of carrying out the measurement on the basis of the measurement request. Using a first period, which is a period in which communication is to be carried out with a first non-AP/PCP communication apparatus, the transmitter and the receiver carry out communication with the first device using a first protocol, and in a second period which is included in the measurement request and in which communication is not carried out with the first device, the receiver carries out measurement of a received signal using the first protocol. The result includes information relating to the measurement of the received signal and information relating to the first protocol.

Abstract: The present disclosure provides a method (100) in a network device for channel estimation. The method (100) includes: transmitting (110) to a terminal device an instruction to precode each of a number, L, of DeModulation Reference Signals, DMRSs, using a number, N, of linearly independent precoders, respectively; receiving (120) from the terminal device L*N precoded DMRSs; estimating (130) an equivalent channel associated with an uplink channel from the terminal device to the network device based on one or more of the L*N precoded DMRSs; and determining (140) the uplink channel from the equivalent channel based on the N precoders.

Abstract: A GNSS receiver having test signal based failure detection, comprises: a signal generator configured to generate a test signal, the test signal having characteristics of a GNSS signal; one of more amplifiers configured to amplify the test signal; a signal chain configured to receive the amplified test signal at an input node of the signal chain and process the received test signal; and a signal processor configured to: monitor the test signal by: obtaining one or more output signals of the device at one or more output node; recovering the test signal from the one or more output signals, and determining whether one or more errors occurred based on parameters of the recovered test signal based on parameters of the recovered test signal; identify a device failure based on the determined one or more errors; and generate notifications relating to the device failure.

Abstract: An integrated circuit capable of on-chip jitter tolerance measurement includes a jitter generator circuit to produce a controlled amount of jitter that is injected into at least one clock signal, and a receive circuit to sample an input signal according to the at least one clock signal. The sampled data values output from the receiver are used to evaluate the integrated circuit's jitter tolerance.

Abstract: System and method for narrowing the transmission curves obtained using a spectral imager in which spectral images are acquired using a MEMS Fabri-Perot (FP) tunable filter. A method includes acquiring a first plurality of broad-band spectral images associated with respective MEMS FP etalon states and processing the first plurality of broad-band spectral images into a second plurality of narrow-band spectral images.

Abstract: The present disclosure relates to a wireless access system supporting an unlicensed band, and provides a method for configuring a transmission opportunity period (TxOP) and devices for supporting the same. The method for configuring a TxOP in a wireless access system supporting an unlicensed band, according to one embodiment of the present disclosure, can comprise the steps of: performing a carrier sensing step for checking whether a secondary cell (SCell) constituted in an unlicensed band is in an idle state; transmitting a reservation signal for a predetermined amount of time if the SCell is in the idle state; and configuring a TxOP in the SCell. At this time, a start point of a first subframe (SF) included in the TxOP can be matched to a subframe, a slot or symbol boundary of a primary cell (PCell) constituted in a licensed band.