114 results about "On-off keying" patented technology

Apparatuses and methods for on-demand synchronization and communication. A method for an electronic device includes identifying an identity (ID) for the electronic device or an ID for a group of electronic devices that includes the electronic device and receiving a first trigger in a monitoring occasion (MO) from a set of MOs. The first trigger includes a signal for timing acquisition that comprises a predetermined sequence based on an on-off-keying (OOK) waveform and a physical channel based on the OOK waveform. The physical channel is after the signal. The method further includes determining, based on the first trigger, indication for the ID for the electronic device or the ID for the group of electronic devices and a paging cause and transmitting or receiving a number of signals or channels based on the paging cause.

Methods, systems, and devices for wireless communications are described. A transmitter may modulate a set of bits into an on-off keying (OOK) sample sequence for wireless transmission to a receiver in a set of frequency resources. The transmitter may apply a transform (e.g., a discrete Fourier transform (DFT)) to the OOK sample sequence to generate a frequency domain representation of the OOK sample sequence. In some cases. the transmitter may, using an orthogonal frequency division multiplexing (OFDM) waveform generator, generate an OFDM waveform based on mapping the frequency domain representation of the OOK sample sequence to a set of resource elements of the set of frequency resources. In some cases. the transmitter may transmit the OFDM waveform to the receiver via the set of frequency resources.

One or more systems, devices, and / or methods may address signal design for ultra-low power receivers. Transmitter and receiver architectures capable of generating signals and waveforms supporting the operation of ultra-low-power receivers and compatible with OFDM-based signals are disclosed. In some cases, there may be procedures that address one or more of the following: device detection of an on-off keying (OOK) modulated sequence with redundant bits corresponding to OFDM symbols' cyclic prefix; device detection of an OOK modulated sequence with dynamic bit duration corresponding to long and short OFDM symbols; device reception of an OOK modulated DCI / message with redundant bits corresponding to OFDM symbols' cyclic prefix; and / or, device reception of an OOK modulated DCI / message with dynamic bit duration corresponding to long and short OFDM symbols.

Aspects relate to enhancing communication between network entities and ambient IoT devices using a cyclic prefix (CP) transparent on-off keying (OOK) waveform. An ambient IoT device may be configured to receive an OOK orthogonal frequency-division multiplexing (OFDM) waveform that includes a CP. The ambient IoT device may be configured to sample symbols of the received OOK OFDM waveform at a pre-defined sampling rate. The pre-defined sampling rate may be based upon a pre-defined duration of the symbols of the received OOK OFDM waveform. In particular, the pre-defined duration of each of the symbols of the received OOK OFDM waveform may be defined such that a last OOK OFDM symbol duration is set to be the same as a first OOK OFDM symbol duration, in which, the first OOK OFDM symbol includes the CP.

Provided is a communication method, the method comprising: an access network device sending a wake-up signal through a first frequency resource and sending a synchronization signal through a second frequency resource, the difference between the center frequency point of the first frequency resource and the center frequency point of the second frequency resource being less than or equal to a first threshold, and / or sending a synchronization signal through the second frequency resource; the total bandwidth of the first frequency resource and the second frequency resource is smaller than or equal to a second threshold value, and the wake-up signal and the synchronization signal are modulated by adopting on-off keying (OOK). A central frequency point or a total bandwidth of a frequency resource (a first frequency resource) for sending a wake-up signal and a frequency resource (a second frequency resource) for sending a synchronization signal of access network equipment is defined, so that relative positions of the first frequency resource and the second frequency resource on a frequency domain are agreed; the purpose of controlling the power consumption of the terminal equipment or reducing the complexity is achieved.

In some examples, a method comprises communicating first data between a first circuit and a second circuit via a differential communication channel across a galvanic isolation barrier within a circuit package, wherein the first data is coded via a first coding technique that comprises ON-OFF shift Keying (OOK) with a differential carrier signal. The method also includes communicating second data between the first circuit and the second circuit via the differential communication channel across the galvanic isolation barrier within the circuit package, wherein the second data is coded via a second coding technique comprises differential pulse coding.

The on-off keying (OOK) receiver has a discontinuous automatic gain control (AGC) that sets the gain at the start of each frame and locks the gain setting for the remainder of that frame, preventing the OOK data from causing instability in the AGC loop. The AGC controller initializes the gain settings of the low-noise amplifier (LNA), low-pass filter (LPF), and programmable gain amplifier (PGA) to maximum values. The LNA, LPF, and PGA are in series and provide an input signal to the rectifier, which produces a voltage output to the 1 / 0 data decision circuit. The level detector compares the voltage output with two thresholds. When either threshold is exceeded, the AGC controller steps down the gain setting until the voltage output is between the two thresholds, at which point the gain setting is locked for the remainder of the current frame. When a long string of 0 data is detected between frames, the frame detector resets the AGC controller between frames. The LNA gain is reduced last.

The present disclosure provides a method and apparatus for transmitting and receiving signals in a wireless communication system. According to the method and apparatus, a low-power wake-up signal (LP-WUS) may be received through a first receiver, and a second receiver may be triggered based on the reception of the LP-WUS. A length L_w of an on-off keying (OOK) symbol of the LP-WUS is determined based on (i) a length N_ofdm of an orthogonal frequency division multiplexing (OFDM) symbol, (ii) a length N_cp of a cyclic prefix (CP) duration of the OFDM symbol, and (iii) a number N of OOK symbols corresponding to the length of the OFDM symbol.

A system and a method are disclosed for low-power wake up signaling and reception for main radio wake-up and power saving. The system and method may relate to sending, by a user equipment (UE), UE capability information corresponding to a capability of a low-power wake-up receiver (LP-WUR) radio to receive orthogonal frequency division multiplexing (OFDM) signals; receiving, by the UE, a low-power wake up signal (LP-WUS), the LP-WUS comprising first data in an on-off keying format and second data in an overlaid OFDM format, wherein the LP-WUS is based at least in part on the UE capability information; and activating, by the UE, based on the received LP-WUS, a main radio for receiving wireless communications.

Near field communications (NFC) may be used of radio frequency identification (RFID) tags and may use amplitude modulated (AM) / amplitude shift keyed (ASK) signals, for instance on-off keying (OOK). The invention discloses an AM scheme where the duration / width of the high amplitude pulse is used to encode data. The invention may encode each symbol to a fixed duration (e.g. 8 periods) with one or two low amplitude periods (P) inserted therein (see Fig. 4). Demodulation may need to consider the duration multiple high amplitude segments together (see. Fig. 6). The amplitude modulation scheme of the invention is intended to enable demodulation without the need for clock recovery. The invention may be used to encode NFC-V or ISO / IEC 15693 symbols / commands.

The invention relates to the technical field of visible light communication, and discloses a low-complexity high-resolution digital-to-light conversion system and method based on an LED array, the low-complexity high-resolution digital-to-light conversion system is mainly composed of an LED array module, a driving voltage configuration module, a photoelectric detection module and a control module, the LED array module comprises N LED units, N determines the system resolution, and N is a positive integer; the driving voltage configuration module provides on-off keying (OOK) signals for each LED unit, light intensity output is adjusted to meet the preset relation Pi = 2 (i-1) * P0, the photoelectric detection module receives and converts light signals of the LED units and outputs electric signals for demodulation, the control module adjusts the driving voltage configuration module according to the digital signals, the light intensity output of the LED array is accurately controlled, and the light intensity output of the LED array is adjusted to meet the preset relation Pi = 2 (i-1) * P0. The system simplifies the complexity of high-resolution digital-to-light conversion, has the advantages of lower power consumption and high-precision output, and solves the problem of larger LED array scale of the digital-to-light conversion system in the prior art.

Methods, systems, and devices for wireless communications are described. A transmitter may modulate a set of bits into an on-off keying (OOK) sample sequence for wireless transmission to a receiver in a set of frequency resources. The transmitter may apply a transform (e.g., a discrete Fourier transform (DFT) ) to the OOK sample sequence to generate a frequency domain representation of the OOK sample sequence. In some cases, the transmitter may, using an orthogonal frequency division multiplexing (OFDM) waveform generator, generate an OFDM waveform based on mapping the frequency domain representation of the OOK sample sequence to a set of resource elements of the set of frequency resources. In some cases, the transmitter may transmit the OFDM waveform to the receiver via the set of frequency resources.

A method of operating a communications device comprising a low-power receiver and a main receiver is provided. The method comprises receiving a low-power wake-up signal, LP-WUS, from a wireless communications network via the low-power receiver while the low-power receiver is in an ON state and the main receiver is in an OFF state, and transmitting to the main receiver, based on receiving the LP- WUS, a wake-up command indicating that the main receiver is to switch from the OFF state to an ON state. Here, a power consumption of the low-power receiver when the low-power receiver is in the ON state is lower than a power consumption of the main receiver when the main receiver is in the ON state. Here, the LP-WUS comprises one or more orthogonal frequency division multiplexing, OFDM, symbols and one or more on-off keying, OOK, symbols, wherein the OOK symbols are each defined as either ON or OFF.

An exemplary setup includes: a rectifier circuit arrangement comprising: a first resistor with one terminal; a second resistor with one terminal; a first transistor with a first terminal, a second terminal, and a control terminal; and a second transistor with a first terminal, a second terminal, and a control terminal;a reference circuit arrangement comprising a first input, a second input, a third input, a fourth input and an output, wherein the first input of the reference circuit arrangement is coupled to the control terminal of the first transistor, wherein the second input of the reference circuit arrangement is coupled to the terminal of the second resistor and the first terminal of the second transistor, wherein the third input of the reference circuit arrangement is coupled to the control terminal of the second transistor, and wherein the fourth input of the reference circuit arrangement is coupled to the terminal of the first resistor and the first terminal of the first transistor.

Methods, systems, and devices for wireless communications are described. A wireless device my transmit multiple reference signals of a reference signal burst in accordance with a reference signal configuration. The reference signal configuration may indicate a duration of the reference signal burst and that a portion of the duration is available for on-off keying (OOK) signal transmission. The wireless device may transmit an OOK signal during the portion of the duration of the reference signal burst that is available for OOK signal transmission. Additionally, or alternatively, the wireless device may transmit the OOK signal via a first resource that may be frequency-division multiplexed (FDMed) with a second resource for reference signal transmission. The wireless device may monitor for a message responsive to one or more of the multiple reference signals of the reference signal burst, responsive to the OOK signal, or responsive to both.

A system and a method are disclosed for low-power wake up signaling and reception for main radio wake-up and power saving. The system and method may relate to sending, by a user equipment (UE), UE capability information corresponding to a capability of a low-power wake-up receiver (LP-WUR) radio to receive orthogonal frequency division multiplexing (OFDM) signals; receiving, by the UE, a low-power wake up signal (LP-WUS), the LP-WUS comprising first data in an on-off keying format and second data in an overlaid OFDM format, wherein the LP-WUS is based at least in part on the UE capability information; and activating, by the UE, based on the received LP-WUS, a main radio for receiving wireless communications.

Aspects of the disclosure are directed to methods and apparatus for time and frequency synchronization during a low-power wake up signal (LP-WUS) procedure. For example, an LP-WUS procedure may include transmission of signaling modulated via on-off keying (OOK). Such a signal requires less processing relative to an orthogonal frequency division multiplexing (OFDM) modulated signal and can be used to notify a wireless node that the transmitting device has data to transmit to the wireless node via an OFDM transmission. Accordingly, in response to the LP-WUS signal, the wireless node may power-on a main radio capable of receiving and demodulating the OFDM transmission.

A system and method for transmitting data in a wireless communication network is disclosed. The method includes: receiving a bitstream including environmental Internet of Things (A-IoT) data from a network node; generating an on-off keying (OOK)-1 or OOK-4 modulated waveform; generating a cyclic prefix (CP) by replicating one or more samples of a first OOK chip in the waveform; adding the CP at the starting end of a first OOK chip in the waveform; and transmitting the waveform with the additional CP to one or more A-IoT devices on a wireless channel.

The invention discloses a capacitance isolation type driving circuit based on a SiC MOSFET, and the driving circuit comprises an on-off keying modulation circuit, the output end of the on-off keying modulation circuit is connected with the input end of a third-order differential isolation transmission circuit, and the output end of the third-order differential isolation transmission circuit is connected with the input end of a frequency-selective amplifier circuit. And the output end of the frequency selective amplifier circuit is connected with the input end of the demodulation circuit. According to the capacitance isolation type driving circuit based on the SiC MOSFET, a third-order differentiating circuit and an isolation capacitor are combined, the rapid response and frequency selection characteristics of the differentiating circuit to high-frequency signals are accurately utilized, input signals are optimized, and the signal coupling efficiency is enhanced; and meanwhile, through a unique circuit topology design, interference signals generated by common-mode transient electric stress are effectively suppressed, the anti-interference capability of the system is greatly enhanced, and the bottleneck of the traditional design in the aspect of common-mode transient immunity is successfully broken through.

Example embodiments of the present disclosure are directed to sequence-based low power wakeup signal (LP-WUS). A method comprises receiving, at a second apparatus from a first apparatus, a LP-WUS message; and decoding the LP-WUS message based on a set of sequences received at respective on-durations of a plurality of On-Off Keying (OOK) symbols included in at least one orthogonal frequency-division multiplexing (OFDM) symbol associated with the LP-WUS message, wherein each sequence in the set of sequences is associated with a phase rotation.

This disclosure provides methods, components, devices and systems for ambient power downlink bandwidth control. Some aspects more specifically relate to generating, by a transmitting device, a spreading waveform by concatenating a sequence of symbols having a first duration, and modulating an on-off keying (OOK) waveform having a different symbol duration with the spreading waveform. In some examples, the different waveforms may have different symbol durations, and symbol boundaries for the OOK waveform and the spreading waveform may or may not align in time. The spreading waveform may include a set of concatenated orthogonal frequency division multiplexing (OFDM) symbols, Barker sequences, or the like. The OOK waveform may include zero-mean OOK signals. The access point (AP) also may apply filtering to ensure that the generated waveform satisfies a spectral mask.

Methods, systems, and devices for wireless communications are described. A network entity may generate an on-off keying (OOK) waveform associated with communication of low power synchronization signal (LP-SS) signaling. The OOK waveform may include one or more on durations and one or more off durations. The network entity may generate a frequency modulated continuous wave (FMCW) waveform associated with communication of synchronization signal block (SSB) signaling. The network entity may transmit a modulated waveform comprising the FMCW waveform modulated with the OOK waveform on the plurality of on durations of the OOK waveform.

Various aspects of this disclosure relate to the transmission mode configuration of low-power synchronization signals. A device with a low-power processor and / or a user equipment (UE) with a primary radio and a low-power radio can receive first signaling comprising a portion of the low-power synchronization signal and a cell identifier (ID) of the serving cell. The first signaling can be transmitted using a transmission mode associated with an indexed modulation scheme (e.g., an on / off keying (OOK) waveform). The device can receive second signaling comprising an indication of the remainder of the cell ID. The device can use the cell ID to establish a radio connection with network equipment (NE), such as a base station.

The present disclosure provides PDCCH monitoring indication methods and apparatuses, a device, and a medium. A method of the present disclosure comprises: receiving a first signal sent by a base station, wherein the first signal carries indication information, and the first signal is generated on the basis of an on-off keying waveform and / or an orthogonal frequency division multiplexing waveform; and, on the basis of the indication information, determining a behavior of a terminal or, on the basis of the state of the terminal and the indication information, determining a behavior of the terminal.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products related to waveform generation of wake-up radio (WUR) signals. One method may include receiving, from an access point (AP), a physical protocol data unit (PPDU) including a wake up radio (WUR) portion and a non-WUR portion. The WUR portion includes a WUR signal occupying a first plurality of resource units (RUs). The WUR signal includes orthogonal frequency division multiplexing (OFDM) modulated information and on-off-keying (OOK) modulated information. The non-WUR portion includes OFDM signals occupying a second plurality of resource units (RUs). The WUR signal may use a same guard interval and OFDM symbol duration as the OFDM signals. The WUR signal and OFDM signals may be orthogonal to each other in a frequency domain. The method may further include demodulating one of the OFDM modulated information and / or the OOK modulated information included in the WUR signal.

Aspects of the disclosure are directed to methods and apparatus for time and frequency synchronization during a low-power wake up signal (LP-WUS) procedure. For example, an LP-WUS procedure may include transmission of signaling modulated via on-off keying (OOK). Such a signal requires less processing relative to an orthogonal frequency division multiplexing (OFDM) modulated signal and can be used to notify a wireless node that the transmitting device has data to transmit to the wireless node via an OFDM transmission. Accordingly, in response to the LP-WUS signal, the wireless node may power-on a main radio capable of receiving and demodulating the OFDM transmission.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, configuration information indicating a pattern associated with a periodic transmission of a signal by the network node, wherein the pattern comprises a first time resource via which no transmission by the network node occurs, followed by a second time resource via which the signal is to be transmitted, followed by a third time resource via which no transmission by the network node occurs. The UE may receive, using an on off keying (OOK) detector based low power wake-up receiver (LP-WUR), the signal in accordance with the pattern. Numerous other aspects are described.

Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may receive wireless signaling including a first wireless signal and a second wireless signal during a same time duration. The first wireless signal and the second wireless signal may carry the same information. For example, the first wireless signal may be an on off keying (OOK) signal and the second wireless signal may be an orthogonal frequency division multiplexing (OFDM) signal. The OFDM signal may include one or more OFDM sequences overlaid on the on durations of the OOK signal. The ODFM signal may carry the same bits as the OOK signal, but in a different (e.g., reverse) order.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. An apparatus and a method for generating on-off keying (OOK) signal based on orthogonal frequency-division multiplexing (OFDM) waveform is provided. A method for an Internet of Things (IoT) device to communicate with a reader includes receiving a preamble signal that includes a start indicator part (SIP) and a clock acquisition part (CAP), receiving a physical reader-to-device channel (PRDCH), and receiving a postamble signal. The preamble signal, the PRDCH, and the postamble signal are OOK modulated based on an OFDM waveform. The preamble signal is followed by the PRDCH without a gap. The PRDCH is followed by the postamble signal without a gap. When the postamble signal ends in during an OFDM symbol duration, a padding signal is included from the end of the postamble signal for a remainder of the OFDM symbol duration.

Disclosed in the present disclosure is a signal transmission method. The method comprises: sending a first signal, wherein the first signal comprises N orthogonal frequency division multiplexing symbols, or N transmission units with the length of T, N and T being positive integers; the N orthogonal frequency division multiplexing symbols comprise a first orthogonal frequency division multiplexing symbol and a second orthogonal frequency division multiplexing symbol, the first orthogonal frequency division multiplexing symbol bearing M on-off keying bits, and the second orthogonal frequency division multiplexing symbol bearing P on-off keying bits; and the N transmission units with the length of T comprise a first transmission unit and a second transmission unit, the first transmission unit bearing M on-off keying bits, the second transmission unit bearing P on-off keying bits, M and P being positive integers, and M not being equal to P. Further disclosed in the present disclosure are a signal transmission apparatus, a communication device, a computer-readable storage medium, and a computer program product.