Abstract: The present technology provides solutions that enable accurate measuring of frequency response on a network (e.g., cable network, fiber optic network) through frequency sweep testing. In various embodiments, the present technology provides a remote transmitter test unit that can be physically deployed at various points in a network. The present technology provides for on demand sweep testing. A remote transmitter test unit or headend test unit can periodically transmit a query message and, based on a response to the query message, can initiate a sweep test. The present technology provides for automatic generation of a sweep profile for a sweep test. Based on an analysis of a frequency spectrum on a network, the sweep profile provides parameters for conducting a sweep test. The present technology provides for Orthogonal Frequency-Division Multiplexing (OFDM) table generation and OFDM sweep testing.

Abstract: Examples disclosed herein relate to an antenna calibration method for a beam steering radar. A first set of input voltages is determined for a plurality of phase shifters coupled to a plurality of antenna elements in an antenna array in the beam steering radar, the voltages to control phases of signals for transmission by the antenna array. A first set of input voltages is applied to the antenna array. Radiating signals resulting from the first set of input voltages are measured. Voltage and phase values for the plurality of phase shifters are iteratively optimized to determine voltage and phase value pairs that result in a desired gain for the antenna array. The voltage and phase value pairs are stored in a look-up-table in the beam steering radar.

Abstract: The present technology provides solutions that enable accurate measuring of frequency response on a network (e.g., cable network, fiber optic network) through frequency sweep testing. In various embodiments, the present technology provides a remote transmitter test unit that can be physically deployed at various points in a network. The present technology provides for on demand sweep testing. A remote transmitter test unit or headend test unit can periodically transmit a query message and, based on a response to the query message, can initiate a sweep test. The present technology provides for automatic generation of a sweep profile for a sweep test. Based on an analysis of a frequency spectrum on a network, the sweep profile provides parameters for conducting a sweep test. The present technology provides for Orthogonal Frequency-Division Multiplexing (OFDM) table generation and OFDM sweep testing.

Abstract: A signal transmission device includes a communication unit that is connected to an electronic device by a signal wiring and performs communication with the electronic device via the signal wiring, a signal processing unit that performs signal processing related to the communication, a power supply unit that supplies direct current to the electronic device via the signal wiring, and a filter circuit connected between the signal wiring and the power supply unit. The filter circuit includes a plurality of filters having frequency characteristics different from each other, and the signal processing unit acquires communication quality information indicating quality of the communication in at least two or more frequency bands, and determines a state of the filter circuit based on the communication quality information.

Abstract: Systems and methods of testing cables are provided. An exemplary testing system for testing radio frequency (RF) cables in a telecommunication system including a cable under test includes a termination element configured to be coupled to a distal end of the cable under test; and a controller in communication with the termination element, wherein the controller switches the termination element between two or more termination states selected from the group consisting of an open termination state, a short termination state, a load termination state, and a through state.

Abstract: A method and apparatus for diversity antenna selection and include receiving a first portion of a signal using a first antenna during a first time period and using a second antenna during a second time period, determining a first difference value for the first portion received by the first antenna, the first value being a difference between a signal level for the first portion received by the first antenna and a threshold signal level associated with the first antenna, and determining a second difference value for the first portion received by the second antenna, the second value being a difference between a signal level for the first portion received by the second antenna and a threshold signal level associated with the second antenna. The method and apparatus include receiving a second portion of the signal using the first antenna if the first difference value is greater than the second difference value.

Abstract: Apparatus and methods for envelope alignment calibration in radio frequency (RF) systems are provided. In certain embodiments, calibration is performed by providing an envelope signal that is substantially triangular along an envelope path, and by providing an RF signal to a power amplifier along an RF signal path. Additionally, an output of the power amplifier is observed to generate an observation signal using an observation receiver. The observation signal includes a first peak and a second peak, and a delay between the envelope signal and the RF signal is controlled based on relative size of the peaks of the observation signal to one another.

Abstract: The present invention provides a receiver including a filter, a signal detection circuit and a synchronization processing circuit. The filter is configured to filter a filter input signal to generate a filter output signal. The signal detection circuit is configured to determine whether the filter input signal or the filter output signal includes an interference signal according to the filter input signal and the filter output signal, to generate an interference signal indicator; wherein when the interference signal indicator indicates that the filter input signal or the filter output signal includes the interference signal, the signal detection circuit further determines whether the filter output signal comprises an effective signal to generate an effective signal indicator. The synchronization processing circuit is configured to process the filter output signal according to the interference signal indicator and the effective signal indicator.

Abstract: Using information contained in clipped samples from analog-to-digital (ADC) conversion to improve receiver performance, by, for example, reducing the clipping distortion caused by ADCs due to its data resolution constraints. This provides an advantage over existing solutions, which perform suboptimally because the existing solution discard information in tire clipped samples.

Abstract: A monitoring system is proposed for monitoring the state of a cable which is routed through a cable routing device or an energy chain. A monitoring apparatus (10; 20; 30) is provided for this purpose and has an evaluation unit which determines information relating to the state of the cable to be monitored. The invention provides for the monitoring apparatus to comprise a first data communication device (11) with a data communication interface and a second data communication device (12; 12?) with a data communication interface. These devices (11,12) are configured for data communication according to a digital data transmission protocol and are connected by means of the interfaces thereof via the cable (13; I3A; I3B) to be monitored.

Abstract: Apparatuses, methods, and systems are disclosed for precoding wireless communications. An apparatus includes a processor and a memory coupled with the processor. The memory includes instructions that are executable by the processor to cause the apparatus to precode a set of symbols over a set of resources using a transform precoder that constrains a search space of codewords to a unit hypersphere such that the transform precoder comprises a spherical codebook having an angular threshold distance between codewords and to combine the precoded symbols in a redundant manner such that multiple parts of precoded symbols are used to protect against loss of the set of symbols.

Abstract: The present application discloses a massive MIMO wireless energy transmission method based on dynamic frame transmission. The method comprises the following steps: controlling, by a base station, each antenna to transmit a pilot signal to a user end in a time-sharing mode by using set time-sharing pilot frames; acquiring, by the user end, downlink channel state information from the antennae of the base station to the user end and feeding the downlink channel state information back to the base station; and calculating, by the base station, a precoding matrix based on the downlink channel state information, mapping data from a user layer to an antenna port by using the newly calculated precoding matrix, and performing beam forming calculation with maximization of an energy signal of the user end as a goal.

Abstract: A method and an apparatus for transmitting a physical layer protocol data unit that can provide a short training field sequence for a larger channel bandwidth. The short training field sequence has a smaller peak-to-average power ratio PAPR and better performance. The method includes: generating a physical layer protocol data unit PPDU, where the PPDU includes a short training field, a length of a frequency domain sequence of the short training field is greater than a first length, and the first length is a length of a frequency domain sequence of a short training field of a PPDU transmitted on a channel with a bandwidth of 160 MHz; and sending the PPDU on a target channel, where a bandwidth of the target channel is greater than 160 MHz.

Abstract: A method includes using a first trained artificial intelligence/machine learning (AI/ML) model to identify occupied frequency channels associated with one or more incoming signals during multiple time periods, where the one or more incoming signals include a frequency-hopping spread spectrum (FHSS) signal. The method also includes generating one or more baseband signals using portions of the one or more incoming signals associated with the occupied frequency channels. The method further includes using a second trained AI/ML model to recover data from the one or more baseband signals, where the recovered data represents at least a portion of data that is encoded in the FHSS signal.

Abstract: In some implementations, an ultra-wideband (UWB) transmitter may generate a data packet for performing the UWB ranging, wherein: the data packet comprises a plurality of symbols, and the data packet further includes one or more zero-power symbols at one or more respective pseudo-random locations in the plurality of symbols. The UWB transmitter may transmit the data packet via UWB radio frequency (RF) signals during a UWB ranging session between the UWB transmitter and a UWB receiver.

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: A cable network that includes a multi-slope equalizer and/or cable simulator.

Abstract: There is provided a calibration device including: a calibration signal supply unit configured to supply, as a calibration input signal, a multitone signal having tones at a plurality of frequency bands to a converter configured to multiply an input signal by each of a plurality of signal patterns and limit a band to obtain each of a plurality of bandpass signals, and reconstruct an output signal in accordance with the input signal from the plurality of bandpass signals; a calibration bandpass signal acquisition unit configured to acquire a plurality of calibration bandpass signals obtained by the converter in response to the multitone signal; and a calibration processing unit configured to calibrate a parameter for the reconstruction in the converter based on the plurality of calibration bandpass signals.

Abstract: A method for wireless communication in a reflective environment includes (a) receiving first wireless signals at a first antenna assembly at least partially via a first reflective environment, (b) generating a first electrical signal from a first antenna element of the first antenna assembly in response to the first wireless signals, the first antenna element having a first polarization, (c) generating a second electrical signal from a second antenna element of the first antenna assembly in response to the first wireless signals, the second antenna element having a second polarization different from the first polarization, (d) shifting phase of at least one of the first electrical signal and the second electrical signal, and (e) after shifting phase, combining at least the first electrical signal and the second electrical signal to generate a combined electrical signal.

Abstract: Embodiments of the present disclosure provide a data transmission method and a network device. The method includes generating, by a network device, a slot format indicator (SFI). The SFI is used to indicate one or more slot format indices. The one or more slot format indices are used to determine a slot format in a time unit based on a first correspondence relationship. The first correspondence relationship is a relationship between a slot format index and a slot format. The method also includes sending, by the network device, the SFI to a terminal device. The method further includes sending, by the network device, a physical downlink control channel (PDCCH) to the terminal device according to the slot format corresponding to the one of the one or more slot format indices indicated by the SFI. The SFI is carried in downlink control message (DCI), and the DCI is scrambled by using a radio network temporary identifier (RNTI).