186 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.

Various solutions for on-off keying (OOK) signal generation with respect to reader apparatus and an Internet of Things (IoT) device are described. A reader apparatus may generate an OOK signal with an orthogonal frequency-division multiplexing (OFDM) waveform, wherein a start of an OOK signal transmission is aligned with a boundary of a symbol of the OFDM waveform. The reader apparatus may transmit the OOK signal to an IoT device.

A bi-directional optical communication system employing a minimum number of single-mode high repetition rate pulsed optical signal sources to achieve cost efficiency while maintaining high data rates. The bi-directional optical communication system includes a first optical data processing unit and a second optical data processing unit. The first optical data processing unit modulates a pulsed optical source using a differential quadrature phase shift keying (DQPSK) modulation and two-level pulse amplitude (PAM-2) modulation and then demodulates it to achieve a pulse amplitude modulated signal. The second optical data processing unit reuses the same optical carrier by passing it through a regenerative wavelength converter to generate three pulsed optical carriers at different wavelengths and employs an On-off keying (OOK) modulation scheme. These carriers are employed to send uplink data at a same rate of as the downlink. As a result, large data is transmitted from one data center to another data center through a downlink and uplink free space optical link network.

The invention relates to a passive Internet of Things communication method and device, communication equipment and a computer readable storage medium. The method comprises the following steps: encoding a first signal to obtain a second signal, the first signal being any one of downlink signals; performing on-off keying (OOK) modulation on the second signal to obtain a third signal; performing discrete Fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-s-OFDM) modulation on the third signal to obtain a fourth signal; and sending the fourth signal to the passive Internet of Things equipment. By adopting the method, the reliable transmission of the downlink signal of the communication physical layer of the passive Internet of Things can be realized.

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.

A bi-directional optical communication system employing a minimum number of single-mode high repetition rate pulsed optical signal sources to achieve cost efficiency while maintaining high data rates. The bi-directional optical communication system includes a first optical data processing unit and a second optical data processing unit. The first optical data processing unit modulates a pulsed optical source using a differential quadrature phase shift keying (DQPSK) modulation and two-level pulse amplitude (PAM-2) modulation and then demodulates it to achieve a pulse amplitude modulated signal. The second optical data processing unit reuses the same optical carrier by passing it through a regenerative wavelength converter to generate three pulsed optical carriers at different wavelengths and employs an On-off keying (OOK) modulation scheme. These carriers are employed to send uplink data at a same rate of as the downlink. As a result, large data is transmitted from one data center to another data center through a downlink and uplink free space optical link network.

Certain aspects of the present disclosure provide techniques for multi-carrier on-off keying communications. A method for wireless communications by an apparatus includes receiving a signal comprising multiple carrier frequencies modulated with on-off keying; decoding the signal based at least in part on a delta frequency being associated with a first carrier frequency and a second carrier frequency among the multiple carrier frequencies; and recovering data from the decoded signal.

According to some embodiments, a wireless device receives, from a network node, a wake up signal, WUS, comprising an on-off keyed, OOK, pattern where orthogonal frequency division multiplexing, OFDM, sequences are transmitted during ON durations of the OOK pattern. First information is 5 carried by the OOK pattern and second information is carried by the OFDM sequences. The second information includes additional information not included in the first information. According to some embodiments, a wireless device receives, from a network node, a synchronization signal comprising an OOK pattern where OFDM sequences are transmitted during ON durations of the OOK pattern. Information is carried by the OFDM sequences in the synchronization signal. The 0 wireless device uses at least part of the synchronization signal as a synchronization signal for a wake up receiver, WUR.

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 invention discloses a transmission scheme design and performance optimization method of a symbiotic radio system based on an intelligent reflection surface. In the scheme, the intelligent reflection surface assists the multi-antenna base station to communicate with a main user, and meanwhile, the intelligent reflection surface serves as a backscattering device to generate a secondary signal and transmit information to a secondary user. The intelligent reflection surface controls the on-off of the reflection unit in an on-off keying mode, modulation and scattering of base station reflection signals are achieved, and a secondary user carries out secondary symbol detection through an energy detection method. On the premise of ensuring the transmission rate of main user transmission, joint optimization is performed on a base station beam forming vector and a phase shift matrix of an intelligent reflection surface so as to minimize the error probability of scattering transmission. An original optimization problem is a non-convex problem and is converted and solved by adopting a positive semidefinite relaxation method, an alternating iterative optimization method and other methods. Compared with a conventional symbiotic radio transmission scheme, the scheme provided by the invention has a higher primary transmission rate and a lower secondary transmission bit error rate.

The invention discloses a terahertz broadband on-off keying modulator with stable input impedance. According to the invention, a parallel common-base common-emitter bottom differential pair is adopted, and when the parallel common-base common-emitter bottom differential pair works in a differential mode state, a signal path formed by transistors Q6, Q5, Q7 and Q8 forms an amplification path, so that high current gain is ensured; when working in a common-mode state, signals from the common emitter transistor pairs Q5 and Q8 and signals from the common base transistor pairs Q6 and Q7 are offset, so that common-mode leakage signals are inhibited, and the'on-off 'isolation degree is further improved. The working frequency band is regulated and controlled by regulating and controlling the direct-current bias and the size of the common-base transistor to the Q6 and the Q7. According to the invention, a parallel common-base common-emitter differential pair is adopted as a double-balance differential structure OOK modulator of a bottom tail tube, so that low on / off input impedance change is realized while ultra-wideband input matching and high switch isolation are realized.

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.

A body area network (BAN) architecture including a plurality of ultra-wideband (UWB) BAN node devices, a control node device, and a remote node device is described. The plurality of UWB BAN node devices measures real-time physiological data of a patient and transmits the physiological data to the control node device using UWB signals. The control node device encodes the UWB signals using an spectral amplitude coding-optical code division multiple access (SAC-OCDMA) encoder, modulates the encoded UWB signals using an on-off keying (OOK) scheme, combines the modulated UWB signals into an optical signal using an optical coupler, and transmits the combined optical signal through a free space optical (FSO) link to the remote node device. The remote node device decodes the combined optical signal using an SAC-OCDMA decoder, converts the decoded optical signal into an electrical signal, and analyzes the physiological data based on the electrical signal.

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.

Apparatuses and methods for transmission and reception without precise timing capability. A method for an Internet of Things (IoT) device to communicate with a reader includes receiving a physical reader-to-device channel (PRDCH) from the reader and determining a transmission timing of a physical device-to-reader channel (PDRCH) to the reader. Transmission of the PDRCH is triggered by reception of the PRDCH. The transmission timing of the PDRCH is determined based on a reception timing of the PRDCH or another PRDCH. The method further includes transmitting the PDRCH to the reader at the determined transmission timing. The PDRCH is On-Off Keying (OOK) or Phase-Shift Keying (PSK) modulated by backscattering an externally provided carrier wave (CW) or generating the CW internally.

The embodiment of the invention provides a method and a device for generating an on-off keying signal in mobile communication, and describes various solutions for generating the on-off keying signal of a reading device and Internet of Things equipment. A reading device may generate an OOK signal having an Orthogonal Frequency Division Multiplexed waveform, where a start of OOK signal transmission is aligned with symbol boundaries of the OFDM waveform. The reading apparatus may transmit the OOK signal to the IoT device.

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.

A body area network (BAN) architecture including a plurality of ultra-wideband (UWB) BAN node devices, a control node device, and a remote node device is described. The plurality of UWB BAN node devices measures real-time physiological data of a patient and transmits the physiological data to the control node device using UWB signals. The control node device encodes the UWB signals using an spectral amplitude coding-optical code division multiple access (SAC-OCDMA) encoder, modulates the encoded UWB signals using an on-off keying (OOK) scheme, combines the modulated UWB signals into an optical signal using an optical coupler, and transmits the combined optical signal through a free space optical (FSO) link to the remote node device. The remote node device decodes the combined optical signal using an SAC-OCDMA decoder, converts the decoded optical signal into an electrical signal, and analyzes the physiological data based on the electrical signal.

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.

The invention discloses a piezoelectric type Lamb wave communication method based on an adaptive threshold value. Binary data is converted into an on-off keying lamb wave signal by using a piezoelectric sensor, and the on-off keying lamb wave signal is amplified and filtered by a signal conditioning module after being propagated through a metal plate. When the data processing module continuously samples the signals, a dynamic threshold algorithm is adopted, a reference threshold is generated by initially calculating a signal amplitude average value, the average value and threshold value parameters are updated in real time in the sampling point traversing process, and self-adaptive signal segmentation is achieved. And the segmented waveform is decoded into binary data according to a coding rule, and finally the binary data are converted and output through an ASCII code. The technology can complete data transmission without depending on electromagnetic waves, and is suitable for equipment communication requirements in an electromagnetic shielding environment. The method overcomes the problem of high misjudgment rate of a traditional fixed threshold technology under the condition of low signal-to-noise ratio, realizes self-adaptive adjustment of signals, and has the advantages of high real-time performance, strong anti-interference capability, stable data transmission and the like.

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.