Abstract: Systems and techniques are disclosed to reduce pilot overhead by providing common reference signals coded with cover codes that are orthogonal in time and frequency domains. Common reference signals that are coded by cover codes orthogonal in both domains can be de-spread in both the time and frequency domains for improved resolution and larger pull-in windows for both. Also disclosed is semi-uniform pilot spacing in both the frequency and time domains. In a time domain, a first pilot symbol pair is spaced by a first time interval from each other and a second pilot symbol pair is spaced by a second time interval from the first pair, the second interval being greater than the first. In a frequency domain, a first set of pilot symbols is densely placed in a selected frequency band and a second set of pilot symbols is sparsely placed surrounding and including the selected frequency band.

Abstract: A variable frequency oscillator circuit for generating an oscillating signal of a desired frequency, comprising a fixed frequency oscillator; one or more frequency dividers, arranged to receive the output of the fixed frequency oscillator and generate a signal with a divided frequency; and one or mixers, arranged to mix the outputs of the one or more frequency dividers to generate the oscillating signal of the desired frequency. The variable frequency oscillator circuit is arranged to modify the operation of the one or more mixers to suppress any unwanted signals in the generated oscillating signal.

Abstract: Described herein are methods for monitoring and/or extracting subject motion from multi-channel electrical coupling in imaging of the subject, in particular in magnetic resonance (MR) imaging of the subject.

Abstract: The present document relates to a wireless communication system and, more specifically, to a method for flexibly supporting resource allocation in a wireless LAN system, and a method and an apparatus for signal transmission using the same. To this end, a first STA configures a radio frame comprising: a signaling (SIG) field including control information; and a data field in which data can be transmitted via a discontinuous channel or a channel having a bandwidth size that is supported by a legacy system. When the first STA transmits the configured radio frame to a second STA, the SIG field preferably comprises: information about a full bandwidth in which data can be transmitted via the data field; and null indicator information indicating a channel region of the full bandwidth that is not used in data transmission, or used channel indicator information indicating a channel region of the full bandwidth that is used in data transmission.

Abstract: In one embodiment, a method receives a downstream signal and an upstream signal in a same frequency band. The downstream signal and the upstream signal are separated into a first path and a second path. The downstream signal using the first path and the upstream signal using the second path are amplified in an analog domain. The method isolates the downstream signal and the upstream signal from one another and sends the downstream signal downstream to a subscriber device and sends the upstream signal towards a full duplex node.

Abstract: The present invention relates to a method for transmitting and receiving data performed by a first device that receives service list information through Bluetooth Low Energy (LE). The present invention provides a method and apparatus including receiving an advertising message for discovering a second device from the second device, establishing a Bluetooth LE connection with the second device based on the advertising message, transmitting a first request message requesting connection information for establishing the Bluetooth BR/EDR connection with the second device through the Bluetooth LE, receiving a first response message including the connection information from the first device, and establishing a Bluetooth BR/EDR connection for providing a specific service with the second device.

Abstract: Apparatuses and methods for input receiver circuits and receiver masks for electronic memory are disclosed. Embodiments of the disclosure include memory receiver masks having shapes other than rectangular shapes. For example, a receiver mask according to some embodiments of the disclosure may have a hexagonal shape. Other shapes of receiver masks may also be included in other embodiments of the disclosure. Circuits, timing, and operating parameters for achieving non-rectangular and various shapes of receiver mask are described.

Abstract: The present disclosure provides a super-regenerative transceiver with a feedback element having a controllable gain. The super-regenerative transceiver utilizes the controllable gain to improve RF signal data sensitivity and improve RF signal data capture rates. Super-regenerative transceivers described herein permit signal data capture over a broad range of frequencies and for a range of communication protocols. Super-regenerative transceivers described herein are tunable, consume very little power for operation and maintenance, and permit long term operation even when powered by very small power sources (e.g., coin batteries).

Abstract: Dipole antenna arrays are disclosed. An example dipole antenna array includes a ground plane having a first serrated edge, and a first dipole antenna, at least a portion of the first dipole antenna disposed parallel to the first serrated edge.

Abstract: Disclosed wireless tunneling system includes two wireless tunneling apparatuses that communicate with each other through the wireless link. A local wireless tunneling apparatus is coupled to a local processing apparatus through a wired connection and a remote wireless tunneling apparatus is coupled to the remote processing apparatus through another wired connection. The two processing apparatuses bi-directionally communicate with each other through the wireless link using the two wireless tunneling apparatuses as if the two processing apparatuses were connected through a wired connection.

Abstract: According to methods of performing measurements to determine a distance to a passive-intermodulation (“PIM”) source, a first RF signal comprising a first frequency and a second RF signal comprising a second frequency may be applied to a device under test. A reference signal comprising a higher-order intermodulation-product of the first frequency and the second frequency may also be generated. An output signal from the device under test and the reference signal may be digitized and a calibration measurement may be applied. A phase difference between the device under test output and the reference signal may be determined. A plurality of phase differences may be determined for multiple first frequencies, and from the plurality of phase differences, a delay may be calculated, which may be multiplied by the velocity of propagation on the medium connecting the device under test to the test equipment to determine a distance to the PIM source.

Abstract: Systems and methods for signaling a pattern of cyclic shifts and orthogonal cover codes for use by a wireless device in multi-layer transmissions are presented. In one exemplary embodiment, a method includes receiving a signal that includes B bits for identifying a reference signal. Each of several available reference signals are defined by a cyclic shift and an orthogonal cover code. Further, the method includes using the B bits to identify the cyclic shift and orthogonal cover code according to pre-determined tables that map each value of the B bits to a pattern of cyclic shift and orthogonal cover code combinations for a multi-layer transmission scheme. The patterns for the multi-layer transmission scheme include first and second patterns based on the same cyclic shifts, but where some, but not all, of the cyclic shifts in the first pattern are associated with the same corresponding orthogonal cover codes in the second pattern.

Abstract: A semiconductor device and command generation method, the semiconductor device includes a command recovery circuit configured to receive a command from a plurality of commands, to store a code signal which is generated by encoding the received command from the plurality of commands, depending on the received command, and generate a plurality of internal commands by decoding a command code signal which is generated from the code signal after shifting the received command depending on a shifting control signal; and a memory circuit configured to perform an internal operation depending on the plurality of internal commands.

Abstract: The present application discloses a method and an apparatus for signal processing. In the present application, since a front end device in a base station system performs MIMO detection and related baseband-processing of a time domain signal received from an antenna unit and transmits the signal that is baseband-processed to a back end device of the base station system, the back end device merely performs other baseband processing, apart from the MIMO detection and the related baseband processing. Compared with the prior art, the embodiments of the present application move some of the baseband processing forward to be implemented on a front end device such that only the data of each scheduled user with less redundancy are required to be transmitted in an interface between the front end device and a backend device, reducing the pressure on the rate of data transmission between the front end device and the back end device.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. A first wireless communication device determines a co-phasing factor between at least two transmit beams transmitted by a second wireless communication device. The co-phasing factor is determined for generation of at least one co-phased beam by the second wireless communication device. The first wireless communication device transmits information to the second wireless communication device identifying the co-phasing factor. Numerous other aspects are provided.

Abstract: SAR-DAC devices and operation methods of SAR-DAC devices are provided. An exemplary SAR-DAC device includes a comparator having a positive input terminal and a negative input terminal; and a DAC core unit including a first capacitor, a second capacitor, and a current-controlled discharging structure. The first capacitor includes a first charging-discharging terminal. The second capacitor includes a second charging-discharging terminal. The current-controlled discharging structure includes current beam circuit units. Each current beam circuit unit includes a first discharging input terminal connected to the first charging-discharging terminal and a second discharging input terminal connected to the second charging-discharging terminal.

Abstract: A same-aperture any-frequency simultaneously transmit and receive (STAR) system includes a signal connector having a first port electrically coupled to an antenna, a second port electrically coupled to a transmit signal path, and a third port electrically coupled to receive signal path. The signal connector passes a transmit signal in the transmit signal path to the antenna and a receive signal in the receive signal path. A signal isolator is positioned in the transmit signal path to remove a residual portion of the receive signal from transmit signal path. An output of the signal isolator provides a portion of the transmit signal with the residual portion of the receive signal removed. A signal differencing device having a first input electrically coupled to the output of the signal isolator and a second input electrically coupled to the third port of the signal connector subtracts a portion of the transmit signal in the receive signal path thereby providing a more accurate receive signal.

Abstract: An antenna system loaded in a vehicle according to the present invention includes a first antenna system to perform Multi Input Multi Output (MIMO) by use of a plurality of first antenna elements provided therein to transmit and receive a first signal according to a first communication system, and a second antenna system to perform beam-forming by use of a plurality of second antenna elements configured to transmit and receive a second signal according to a second communication system, wherein the plurality of first antenna elements and the plurality of second antenna elements are disposed on the same circuit board, whereby an antenna arrangement structure with optimized isolation among antenna elements in a flat vehicle antenna having an LTE antenna system and a 5G antenna system can be provided.

Abstract: A phase-locked loop (PLL) circuit includes a voltage-controlled oscillator configured to generate an output clock, and a sub-sampling PLL circuit configured to receive, from the voltage-controlled oscillator, the generated output clock as feedback, and perform a phase-locking operation on the received output clock. The sub-sampling PLL circuit includes a buffer configured to buffer the received output clock, and the sub-sampling PLL circuit is further configured to adaptively adjust an internal signal to maintain a loop bandwidth of the sub-sampling PLL circuit, based on a change of a characteristic of the buffer according to at least one of process, voltage, and temperature (PVT) change.

Abstract: A device comprises antennas and a signal processor, and each antenna comprises antenna elements. The signal processor is configured to: receive an input signal for a multiple-input multiple-output (MIMO) operation; generate complex weights; generate feed signals based on the input signal and the complex weights; and provide the feed signals to the antenna elements so that the MIMO operation uses at least two antenna elements from two different antennas.

Abstract: A transceiver system is disclosed. The transceiver system comprises a first transceiver physical layer circuit (PHY) having a first plurality of channels and a second transceiver PHY disposed adjacent the first transceiver PHY and having a second plurality of channels. Far end crosstalk filter circuitry is coupled between at least one of the plurality of first channels and at least one of the plurality of second channels.

Abstract: Systems, methods, and apparatus for transmitting additional information over a synchronous serial bus are described. A method performed at a transmitting device coupled to the serial bus includes providing first data in a data signal to be transmitted on a first wire of a multi-wire serial bus, providing a series of pulses in a clock signal to be transmitted on a second wire of a multi-wire serial bus, where each pulse has a rising edge and a falling edge, each edge being aligned with a different bit of the first data. The method may include encoding second data in the clock signal by controlling a duration of each pulse in the series of pulses based on a value of one or more bits of the second data, and transmitting the data signal and the clock signal over the serial bus.

Abstract: The present disclosure relates to a 5G or pre-5G communication system for supporting a data rate higher than that of a 4G communication system such as an LTE system. The present invention relates to a CSI reporting method and apparatus, and the method of a base station according to the present invention includes transmitting first reference signal information and second reference signal information, transmitting reference signals based on at least one of the first and second reference signal information, transmitting downlink control information (DCI) including information indicating whether the reference signals are transmitted based on the second reference signal information, and receiving Channel State Information (CSI) generated by measuring the reference signals.

Abstract: A circuit controls a dynamic time constant to remove DC offset from a received optical data signal. The circuit has a first capacitor coupled between a first terminal and a second terminal. A first resistance network is coupled between the second terminal and a reference voltage. A control circuit has a first output coupled to a control input of the first resistance network. The control circuit monotonically increases an effective resistance of the first resistance network to increase the dynamic time constant. The first resistance network has a resistor coupled to the second terminal, and a transistor with a first conduction terminal coupled to the resistor, a second conduction terminal coupled to the reference voltage, and a control terminal coupled to the first output of the control circuit. The first capacitor has a variable capacitance. The monotonic increase in the dynamic time constant can be linear or non-linear.

Abstract: Apparatuses (including user equipment (UE) and modem chips for UEs), systems, and methods for UE downlink Hybrid Automatic Repeat reQuest (HARQ) buffer memory management are described. In one method, the entire UE DL HARQ buffer memory space is pre-partitioned according to the number and capacities of the UE's active carrier components. In another method, the UE DL HARQ buffer is split between on-chip and off-chip memory so that each partition and sub-partition is allocated between the on-chip and off-chip memories in accordance with an optimum ratio.

Abstract: Apparatuses, systems, and associated methods are described that provide signal transmission over copper media. An example module includes a number of electrical signal generators that each generate an electrical signal, and a signal modulation system that receives the electrical signals generated by the electrical signal generators. The signal modulation system further modulates each of the electrical signals such that each modulated electrical signal is distinguishable from the other modulated electrical signals. The module further includes an active copper multiplexer in electrical communication with the electrical signal generators that receives the modulated electrical signals from the signal modulation system. The active copper multiplexer further combines the multiple modulated signals into a single combined electrical signal and transmits the single combined electrical signal through a single copper cable.

Abstract: Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management in a mobile device includes processing an RF receive signal to generate a digital baseband receive signal using a receive channel of a first transceiver, processing a first RF observation signal to generate a first digital observation signal using a first observation channel of the first transceiver, generating spectral regrowth observation data based on processing process the first digital observation signal using a first spectral regrowth baseband sampling circuit of the first transceiver, and compensating the digital baseband receive signal for RF signal leakage based on the spectral regrowth observation data and on direct transmit leakage observation data using a discrete time cancellation circuit of the first transceiver.

Abstract: Encoding methods and systems are provided for a memory device including quadruple-level cell (QLC) memory cells. A controller of a memory system includes a first encoder and a second encoder. The first encoder encodes, based on a constrained code, a first group of data to generate a third group of data, the first group of data corresponding to first and third logical pages among a plurality of logical pages. The second encoder encodes, based on a Gray code, a second group of data and the third group of data to generate encoded sequences corresponding to a plurality of program-voltage (PV) levels, the second group of data corresponding to the second and fourth logical pages among the plurality of logical pages.

Abstract: A system for digital self-interference cancellation includes a filter that generates a reduced-noise digital residue signal; a channel estimator that generates a current self-interference channel estimate from a digital transmit signal, the reduced-noise digital residue signal, and past self-interference channel estimates; a controller that dynamically sets the digital transform configuration in response to changes in a controller-sampled digital residue signal; a predictor that modifies output of the channel estimator to compensate for a first time delay incurred in tuning the system for digital self-interference cancellation; and a channel memory that stores the past self-interference channel estimates.

Abstract: Disclosed is a modem system for transmitting and receiving multi-rotational waveforms comprising at least one waveform modulation subsystem, and a demodulation subsystem programmed to receive a second plurality of sequentially modulated communication waveforms.

Abstract: A base station receives a report of channel state information (CSI) computation capability from a UE, configures the UE with X and Y values based on the reported computation capability, performs a beam sweep by transmitting direction-unique beams, and receives a beam measurement report from the UE comprising a reference signal receive power (RSRP) of Y strongest beams of the transmitted beams and at least a portion of the CSI of X strongest beams of the Y beams. Based on the beam measurement report, one of the X beams is selected to configure the UE for subsequent data and control channel transmissions. X and Y are positive integers, Y is greater than or equal to X, and Y is at least 1.

Abstract: A system for improved transmission of digital data includes: an incoming data stream having an incoming data rate rateIN; a memory configured to store the data; and a controller configured to write the data to the memory, the controller further configured to generate an outgoing data stream having an outgoing data rate rateOUT, wherein a normalized rate difference rateDIFFERENCE=(rateOUT?rateIN)/rateIN between the incoming data rate rateIN and the outgoing data rate rateOUT is a negative number of parts per million (ppm).

Abstract: A filter bank multicarrier communication system is proposed. The system adopts the real-valued discrete Hartley transform for both multicarrier modulation and demodulation, rather than the complex-valued inverse discrete Fourier transform for multicarrier modulation and the discrete Fourier transform for multicarrier demodulation in conventional filter bank multicarrier schemes, so as to reduce implementation complexity and to enhance system performance.

Abstract: A wireless user equipment (UE) device may include a receiver and transmitter. The UE device may dynamically vary the fidelity requirements imposed on the analog signal processing performed by the receiver and/or the transmitter in response factors such as: amount of signal interference (e.g., out-of-band signal power); modulation and coding scheme; number of spatial streams; extent of transmitter leakage; and size and/or frequency location of resources allocated to the UE device. Thus, the UE device may consume less power on average than a UE device that is designed to satisfy fixed fidelity requirements associated with a worst case reception scenario and/or a worst case transmission scenario.

Abstract: The present invention provides an operation method of an user equipment in relation to CSI-RS in a wireless communication system. Particularly, an operation method performed by a user equipment (UE) according to the present disclosure includes receiving a higher layer signaling including resource configuration information related to an aperiodic transmission of beamformed CSI-RS from a base station (BS); receiving a first DCI format including first control information indicating that there is an aperiodic transmission of the beamformed CSI-RS from the BS; measuring the beamformed CSI-RS based on the received resource configuration information; and reporting a measurement result of the beamformed CSI-RS to the BS.

Abstract: A discrete multitone transceiver (DMT) includes a deinterleaver operable to de-interleave a plurality of bits. The DMT further includes: a forward error correction decoder operable to decode the plurality of bits, a module operable to determine, during Showtime, an impulse noise protection value, wherein the impulse protection value specifies a number corrupted DMT symbols that can be corrected by the forward error correction decoder in combination with the deinterleaver, and a receiver coupled to the deinterleaver. The receiver receives using a first interleaver parameter value, receives a flag signal, and changes to receiving using a second interleaver parameter value that is different than the first interleaver parameter value, wherein the second interleaver parameter value is used for reception on a pre-defined forward error correction codeword boundary following reception of the flag signal.

Abstract: Systems, methods, and circuitries are disclosed for generating a desired signal from a received signal. In one example a signal cancellation system includes local oscillator (LO) downconverter circuitry, frequency offset (FO) signal estimation circuitry, and cancellation circuitry. The LO downconverter is configured to downconvert the received signal using an LO signal having an LO frequency to generate a downconverted received signal. The FO signal estimation circuitry includes FOLO generation circuitry configured to modify the LO signal to generate a FOLO signal having an offset frequency that is different from the LO frequency and FOLO downconverter circuitry configured to use the FOLO signal to downconvert a signal derived from the received signal to generate a downconverted FO signal. The cancellation circuitry is configured to cancel either the downconverted received signal or the downconverted FO signal from the received signal to generate the desired signal.

Abstract: Reciprocity base frequency division duplex (FDD) multiple-input-multiple-output (MIMO) downlink (DL) channel Channel-State Information (CSI) acquisition is provided. A base station (BS) includes a transceiver configured to measure uplink (UL) sounding reference signals (SRSs) at a UL carrier frequency, using two polarization components of an antenna array of the BS, and a processor configured to determine a quantity of propagation paths between the BS and a user equipment (UE), for each of the determined propagation paths, extract propagation parameters from the UL SRS measurements, for each of the determined propagation paths, predict a downlink (DL) channel based on the extracted propagation parameters and a DL carrier frequency, and generate a precoding channel matrix for the UE by summing the predicted DL channels for each of the determined propagation paths and for each of the two polarization components of the antenna array of the BS.

Abstract: A method of transmission over multiple wireless channels in a multiple antenna system includes storing channel modulation matrices at a transmitter; receiving quantized channel state information at the transmitter from plural receivers; selecting a transmission modulation matrix using the quantized channel state information from the stored channel modulation matrices; and transmitting over the multiple channels to the plural receivers using the selected transmission modulation matrix.

Abstract: Provided are a device connected to another device by a single wire and a method of operating a system including the devices. The method of operating the device connected to the other device by the single wire includes transmitting a first packet to the other device, waiting to receive a second packet from the other device, and receiving the second packet from the other device. When the waiting to receive the second packet is started, electrically connecting a first end of a resistor to the first wire, and when the waiting to receive the second packet is terminated, electrically disconnecting a resistor from the first wire. A second end of the resistor is connected to either a logic high level voltage source or a logic low level voltage source.

Abstract: A wireless communication method is provided. The method includes: determining, by a terminal device, a first coefficient, where the first coefficient belongs to a first coefficient set corresponding to a first transmission time interval TTI, the first coefficient set includes N coefficients, N?2, and the N coefficients include at least two coefficients used for uplink transmission in the first TTI, or at least two coefficients used for downlink transmission in the first TTI; determining, by the terminal device, a first transport block size TBS based on the first coefficient; and performing, by the terminal device, wireless communication based on the first TBS in the first TTI. Reliability and accuracy of wireless communication can be improved.

Abstract: A solid state drive (SSD) storage bay includes storage trays and connector cards. A storage tray has a an interposer and an SSD module. A connector of the interposer is connected to a connector of the SSD module, and another connector of the interposer is connected to a connector of a connector card. The connector card includes terminals that connect to a bus of a computer system. The interposer includes wirings that allow electrical signals to propagate between the two connectors of the interposer. The interposer includes circuitry that allow for voltage regulation of supply voltage, level shifting, and hot-swapping.

Abstract: An apparatus determines, when receiving a packet transited via a network in a power saving mode, whether or not the packet is a packet according to a predetermined protocol. If the packet is determined to be the packet according to a predetermined protocol, the apparatus analyzes the data of a succeeding packet described in a data description language, and instructs the apparatus to return from the power saving mode to a normal power mode depending on an analysis result.

Abstract: Power amplifiers having reduced loss. In some embodiments, a power amplification system can include a plurality of power amplifiers, with each power amplifier being configured to receive and amplify a signal in a frequency band. The power amplification system can further include an output filter coupled to each of the power amplifiers by a separate output path such that the power amplification system is substantially free of a band selection switch between the plurality of power amplifiers and their corresponding output filters. Each power amplifier can be further configured to operate with a high-voltage supply to provide an impedance similar to an impedance of the corresponding output filter.

Abstract: The present invention belongs to the field of communications technologies, and discloses a channel state information CSI feedback method and an apparatus. The method includes: determining a codebook of at each transport layer CSI of user equipment UE, where the codebook of the CSI at each transport layer of the UE is: W=W1×W2, an element Xi in W2 is a weighting coefficient corresponding to each codeword in W1, and i is an integer greater than or equal to 1 and less than or equal to K; determining a quantity Ni of bits occupied by a quantized value of an ith element in W2, where quantized values of at least two elements in W2 occupy different quantities of bits; and feeding back the quantized value of the ith element to a network device based on Ni.

Abstract: A channel state reporting method on the basis of an aperiodic channel state information-reference signal (CSI-RS) in a wireless communication system according to an embodiment of the present invention may comprise the steps of: receiving an aperiodic channel state information (CSI) request; and transmitting aperiodic CSI-RS-based CSI at a timing corresponding to one among a plurality of candidate values in response to the aperiodic CSI request, wherein the plurality of candidate values are selected according to a CSI-related parameter, and the CSI-related parameter includes at least one among a type of information included in the CSI, frequency granularity of the CSI, use or non-use of a code book when the CSI is derived, and the number of antenna ports of the CSI-RS.

Abstract: The present invention relates to a field programmable gate array system that provides phase control with minimal latency.

Abstract: Characteristics of channels from an antenna array to a transceiver are characterized based on reciprocity in an approach that eliminates a need for channel feedback from the transceiver. In some embodiments, these channel characteristics are used in MIMO communication to a plurality of transceivers from the antenna array.

Abstract: Techniques and apparatuses are described that enable radar modulations for radar sensing using a wireless communication chipset. A controller initializes or controls modulations performed by the wireless communication chipset. In this way, the controller can enable the wireless communication chipset to perform modulations for wireless communication or radar sensing. In some cases, the controller can further select a wireless communication channel for setting a frequency and a bandwidth of a radar signal, thereby avoiding interference between multiple radar signals or between the radar signal and a communication signal. In other cases, the controller can cause the wireless communication chipset to modulate a signal containing communication data using a radar modulation. This enables another device that receives the signal to perform wireless communication or radar sensing. By utilizing these techniques, the wireless communication chipset can be used for wireless communication or radar sensing.

Abstract: A method of data transmission includes determining the number of layers, generating mapping symbols by mapping modulation symbols for a first codeword and modulation symbols for a second codeword to each layer, and transmitting the mapping symbols through a plurality of antennas. At least one of the first codeword and the second codeword is mapped to at least 3 layers and the number of layers is larger than 3.