Abstract: An integrated circuit includes a demodulator to demodulate a signal simultaneously transmitted over an isolation communication channel and obtain gate information and configuration information. The demodulator includes a gate demodulation path and a configuration demodulation path. The received signal oscillates at a first frequency to represent a first state, oscillates at different frequencies to represent a seconds state, oscillates at a third frequency (or third and fourth frequencies), which are lower than the first frequency, to represent a third state, and the received signal is steady state to represent a fourth state. The gate demodulation path detects the first and second states. The configuration demodulation path includes first and second sub-demodulation paths. An envelope detector in the first sub-demodulation path detects the second state and the second sub-demodulation path detects the third state. The configuration demodulation paths uses an output of the gate demodulation path.

Abstract: A leakage detection instrument may receive an electromagnetic signal radiated from a leakage location within a cable network system. The instrument may determine the leak based on spectral analysis and without the use of tagged or test signals.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless device may receive a sounding waveform via a reciprocal wireless channel. The wireless device may estimate one or more channel parameters associated with the reciprocal wireless channel based at least in part on the sounding waveform. The wireless device may generate a cryptographic key based at least in part on the one or more channel parameters associated with the reciprocal wireless channel. The wireless device may establish a secure communication session over the reciprocal wireless channel based at least in part on the cryptographic key. Numerous other aspects are provided.

Abstract: A wireless apparatus is configured such that: a correlation calculation unit calculates a correlation coefficient for signals received from respective antennas; and a cyclic shift control unit compares the correlation coefficient with a threshold value. If the correlation coefficient is equal to or higher than the threshold value, the cyclic shift control unit determines that there is a direct wave, allocates a common shift amount to a cyclic shift unit, and causes a beam forming unit to form and transmit a narrow beam. Meanwhile, if the correlation coefficient is lower than the threshold value, the cyclic shift control unit determines that there is no direct wave, allocates different shift amounts to the cyclic shift unit, and causes the cyclic shift unit to diversify the cyclic shift.

Abstract: Disclosed are systems and methods to determine which specific message elements, of a 5G or 6G message, are faulted. By comparing the amplitude or phase modulation of each message element to a predetermined modulation level, and comparing the difference to a threshold, the faulted message elements can be identified and, potentially, corrected. For example, the modulation scheme may provide two superposed orthogonal signals, thereby providing two amplitude-modulated signals per message element, and a modulation quality can be derived according to the differences between those two amplitudes and the closest predetermined amplitude levels of the modulation scheme. The SNR or SINR of each message element can also be measured and included in the modulation quality determination. Artificial intelligence may enable improved or faster determination of the faulted message elements by including additional input factors.

Abstract: Presented herein are systems and methods for beam information feedback. A first communication node may receive, from a second communication node, a group of reference signals that are carried either on respective beams or on a same beam. The group of reference signals may be determined based on one or more time-frequency-code resources. The first communication node may determine, based on the group of reference signals, one or more beam indexes and channel state information. The first communication node may transmit, to the second communication node, a set including the one or more beam indexes and the channel state information.

Abstract: A receiving device for use in a wireless OFDM communication system comprises two or more receive antennas for receiving OFDM signals received over a channel from a transmission device having two or more transmit antennas and applying transmit beamforming, and circuitry configured to perform channel estimation to estimate the channel, generate transmit beamforming information based on the channel estimation, the transmit beamforming information comprising beamforming information per subcarrier or time domain tap, determine a reduced set of transmit beamforming information from the transmit beamforming information, wherein the reduced set comprises beamforming information for a reduced set of subcarriers in the frequency domain or for a reduced set of taps in the time domain, wherein the subcarriers of the reduced set or the taps of the reduced set are determined based on an error criterion, and feed back the reduced set of transmit beamforming information to the transmission device.

Abstract: Systems and methods include communicating to one or more access points configured to form a Wi-Fi network, wherein at least some of the one or more access points utilize Orthogonal Frequency-Division Multiple Access (OFDMA), and determining Resource Unit (RU) reservations at the one or more access points that utilize OFDMA.

Abstract: A signal detection method for a MIMO-OFDM wireless communication system includes obtaining a channel matrix of each subcarrier for each MIMO-OFDM data packet; receiving a reception vector of each subcarrier; performing MIMO detection for a first OFDM symbol and channel matrix preprocessing to generate a global dynamic K-value table; performing MIMO detection for each subsequent OFDM symbol, the MIMO detection includes: performing the following steps for each subcarrier of a current OFDM symbol: transforming the reception vector of the current subcarrier into a LR search domain; and obtaining a LR domain candidate transmission vector of the current subcarrier, a K-value applied to each search layer of the current subcarrier during the K-best search is a global dynamic K-value in the global dynamic K-value table corresponding to the search layer.

Abstract: Apparatus and methods for quadrature combined Doherty amplifiers are provided herein. In certain embodiments, a separator is used to separate a radio frequency (RF) input signal into a plurality of input signal components that are amplified by a pair of Doherty amplifiers operating in quadrature. Additionally, a combiner is used to combine a plurality of output signal components generated by the pair of Doherty amplifiers, thereby generating an RF output signal exhibiting quadrature balancing.

Abstract: A method for receiving a wireless signal, performed by a first communication node, may comprise: storing a wireless signal received by the first communication node as samples in a buffer; performing partial correlation operations on the stored samples by a plurality of partial correlators; performing a first FFT operation on results of the partial correlation operations; performing a cumulative product operation on results of the first FFT operation; performing a second FFT operation based on a result of the cumulative product operation; and performing synchronization estimation based on the results of the first FFT operation and a result of the second FFT operation.

Abstract: Aspects of the subject disclosure may include, a non-linear energy detector that obtains baseband information from a mixed signal that corresponds to an information component of a received radio frequency (RF) signal, wherein the mixed signal comprises a local oscillator signal combined, without multiplication, with the received RF signal, wherein the received RF signal comprises a carrier wave component operating at a carrier frequency within a millimeter wave spectrum, wherein the non-linear energy detector is associated with a non-linear current-voltage (I-V) characteristic curve, and wherein the baseband information is obtained by applying the mixed signal to the non-linear I-V characteristic curve. Other embodiments are disclosed.

Abstract: A method for Peak to Average Power Ratio (PAPR) reduction at an input of analog to digital converter (ADC) of the receiver, the method includes mapping, by a mapper, an input symbol to an output symbol that maintains a peak power constraint at the input of the ADC; wherein the mapping is responsive to (a) previously transmitted symbols and (b) a state of the channel following a transmission of the current output symbol; transmitting the output symbol by the transmitter; receiving, by the receiver, a received symbol that represents the output symbol; and de-mapping the received symbol, by a de-mapper of the receiver, to a de-mapped symbol that represents the input symbol.

Abstract: A control station device includes a wireless machine having an interference determination unit that uses one or multiple methods for a received signal to determine in real time whether interference has occurred, a multi-wave simultaneous reception start determination unit that causes received interfering waveform information to be held in a memory and determines whether a plurality of signals have been simultaneously terminated, and an alarm display unit that issues a first alarm indicating an interference state and a second alarm indicating termination of simultaneous transmission based on information from the interference determination unit and information from the multi-wave simultaneous reception start determination unit.

Abstract: Disclosed by the present invention is a sub-band selection activation-based multi-band hyperbolic frequency modulation spread spectrum underwater acoustic communication method. The present invention discloses: dividing the available bandwidth of an underwater acoustic system into a plurality of sub-bands, performing hyperbolic frequency modulation on each of the sub-bands respectively, and performing spread spectrum modulation on the plurality of sub-bands within the same frequency modulation period, thus implementing multi-band parallel transmission. Hence, within each frequency modulation period, the divided plurality of sub-bands is grouped, and each sub-band group activates different sub-bands for transmission according to different options for transmitting data. Compared to other underwater acoustic hyperbolic frequency modulation communication solutions, the present invention further improves the frequency band utilization of the system, and the energy efficiency is also improved.

Abstract: Communication systems positioned within a cab for agricultural operations include at least one antenna element and a communication module having a cellular modem. A machine (e.g., tractor, combine, etc.) for agricultural operations includes a cab for an operator of the machine and a communication system adjacent a window or roof of the cab.

Abstract: The disclosure concerns an embedded antenna having alternating polarization resonators. The embedded antenna includes a substrate, a first antenna radiator, and a second antenna radiator. The substrate has a first surface and a second surface opposite the first surface. The first antenna radiator and second antenna radiator are each disposed on the first surface. The first antenna radiator has a first length extending along the substrate and further includes a first minor radiator element and a second minor radiator element disposed on each terminal end of the first length. The second antenna radiator has a second length wherein the second length is less than the first length. Additionally, the first length and the second antenna radiator comprise a parallel orientation. In some embodiments, the embedded antenna further includes a third antenna radiator and a fourth antenna radiator where each is disposed on the second side.

Abstract: A method, network node and system for providing joint phase and delay compensation for a plurality of antenna branches in a network node having a plurality of antennas by processing injected signals and feedback signals in a frequency domain are provided. According to one aspect, a method includes performing at least squares algorithm applied to the injected signals and the feedback signals to generate corrective signals applied to input signals of each antenna branch.

Abstract: An apparatus implemented in an access point (AP) participates in joint soundings together with one or more other APs in a joint multi-AP (JMAP) configuration to receive joint feedbacks from a plurality of stations (STAs) responding to the joint soundings. The apparatus then performs transmissions in a coordinated multi-AP (CMAP) configuration with the one or more other APs or in a single-AP configuration with no other AP based on the joint feedbacks received while in the JMAP configuration.

Abstract: An end-to-end digital beamforming system includes a transmitter configured to transmit data and a receive configured to receive the data. Each of the transmitter and receiver includes a transceiver configured to communicate via a wired or wireless communication medium. Each of the transmitter and receiver also includes a processor and a base-tile antenna array comprising a plurality of antenna tiles. Each of the antenna tiles includes a radio frequency integrated circuit (RFIC) and an antenna-array-in-package comprising a plurality of antenna elements. The antenna tiles are disposed a different rotations such that a first antenna tile is disposed to transmit a first signal at a first polarization and a second antenna tile is disposed to transmit a second signal at a second polarization. Additionally, each of the antenna tiles transmits a part of a bandwidth.