46 results about "Binary phase shift keying bpsk" patented technology

The invention discloses a method capable of realizing wide-range positioning of a cable fault, a spread spectrum step frequency wave signal is obtained by performing binary phase shift keying (BPSK) and pseudorandom sequence modulation on a step frequency signal, and the method can overcome the problem that the cable fault detection range of a spread spectrum time domain reflectometry (SSTDR) is limited by code element duration. A cable fault detection device is installed at the head end of a cable, a detection signal is injected from the head end of the cable, a high-speed ADC is used for signal collection, cable fault information is obtained, and wide-range detection of cable faults is achieved.

The invention discloses an active pen and touch screen interaction system resistant to common-mode interference and a signal demodulation method. The system comprises a signal receiving terminal and a signal transmitting terminal. The signal transmitting terminal modulates data to be transmitted by adopting a differential binary phase shift keying modulation method, and transmits a generated modulation signal to the signal receiving terminal; the analog front-end receiving module is coupled with the signal transmitting terminal, receives the modulation signal and outputs a digital square wave signal after fidelity extraction processing; and the digital demodulation processing module performs differential coherent digital demodulation on the digital square wave signal based on the prior characteristics of the modulation signal, inhibits residual noise and recovers data to be sent. The analog front end focuses strong common-mode noise suppression and analog filtering, the digital demodulation algorithm performs secondary digital purification by using signal time sequence characteristics, and the two constructs an efficient anti-interference pipeline. Meanwhile, the regular square wave signals can be directly processed through differential coherent demodulation, and the requirements for performance and power consumption of a rear-end processor are lowered.

This application relates to the field of wireless communication, and in particular, to a multi-channel hybrid transmission technology. In an embodiment, a data transmission method comprises: generating, by a first wireless communications device, a physical protocol data unit (PPDU), wherein the PPDU comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), and two signature symbols after the L-SIG in a time-domain, and wherein the two signature symbols are identical and are modulated based on binary phase shift keying (BPSK), the two signature symbols identify a wireless communications standard the PPDU complies with; and transmitting, by the first wireless communications device, the PPDU to a second wireless communications device.

The invention provides a high-temperature-resistant communication circuit, a communication method of the high-temperature-resistant communication circuit and a chip, and belongs to the technical field of communication processing. The circuit comprises a full-bridge driving circuit which comprises a first input end, a second input end, a third input end, a fourth input end, an output end and a working end; the communication antenna is electrically connected with the output end of the full-bridge driving circuit; the communication antenna carries out communication by using a modulation mode of frequency shift keying or binary phase shift keying; the micro-processing unit is electrically connected with the first input end, the second input end, the third input end, the fourth input end and the working end respectively and used for controlling the magnitude and the time sequence of voltage signals input into the first input end, the second input end, the third input end and the fourth input end respectively, so that continuous alternating current is generated on the communication antenna; and the current is used for setting a threshold range for the working end. The high-temperature-resistant communication circuit is used for overcoming the defect that a communication circuit capable of achieving underground high-temperature resistance is lacked in the prior art.

A method and an apparatus for transmitting a physical layer protocol data unit (PPDU) are provided. The method includes: generating a synchronization header field based on a first sequence or a third sequence, where a side lobe of a periodic cross-correlation function of the first sequence and a second sequence is a constant value, the first sequence is a binary sequence consisting of 1 and 0, the second sequence is a binary phase shift keying sequence corresponding to the first sequence, a side lobe of a periodic autocorrelation function of the third sequence is a constant value, and the third sequence is a binary phase shift keying sequence consisting of 1 and −1; and sending the PPDU on a target channel, where the PPDU includes the synchronization header field.

DFT spreading is applied to a sequence of symbols to generate a DFT-spread sequence of symbols. The DFT-spread sequence of symbols is frequency-division multiplexed with a reference signal sequence to generate a multiplexed sequence, and the DFT-spread sequence of symbols and the reference signal sequence are recoverable from demultiplexing the multiplexed sequence. Further processing, such as a transform to convert to time domain and / or spectral shaping, may be applied in some embodiments. The symbols may be modulation symbols to which data bits are mapped, in binary phase-shift keying (BPSK) modulation, pi / 2-BPSK modulation, quadrature phase-shift keying (QPSK) modulation, quadrature amplitude modulation (QAM) or offset-QAM (OQAM), for example. Embodiments may be applied in conjunction with any of different types of reference signals, such as a demodulation reference signal (DM-RS), a phase tracking reference signal (PT-RS), or a channel state information reference signal (CSI-RS), or different types of reference signal sequences.

Methods and apparatus, including computer program products, are provided for pi / 2 BPSK initial access. In some example embodiments, a method can be provided that includes receiving, at a user equipment, information indicating network support for initial network access based on a pi / 2 binary phase shift keying (pi / 2-BPSK) modulation and coding scheme; and in response to the received system information, performing initial network access by at least sending a connection request based on the pi / 2-BPSK modulation and coding scheme. Related systems, methods, and articles of manufacture are also described.

A method and an apparatus for transmitting a physical layer protocol data unit (PPDU) are provided. The method includes: generating a synchronization header field based on a first sequence or a third sequence, where a side lobe of a periodic cross-correlation function of the first sequence and a second sequence is a constant value, the first sequence is a binary sequence consisting of 1 and 0, the second sequence is a binary phase shift keying sequence corresponding to the first sequence, a side lobe of a periodic autocorrelation function of the third sequence is a constant value, and the third sequence is a binary phase shift keying sequence consisting of 1 and −1; and sending the PPDU on a target channel, where the PPDU includes the synchronization header field.

This application relates to the field of wireless communication, and in particular, to a multi-channel hybrid transmission technology. In an embodiment, a data transmission method comprises: generating, by a first wireless communications device, a physical protocol data unit (PPDU), wherein the PPDU comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), and two signature symbols after the L-SIG in a time-domain, and wherein the two signature symbols are identical and are modulated based on binary phase shift keying (BPSK), the two signature symbols identify a wireless communications standard the PPDU complies with; and transmitting, by the first wireless communications device, the PPDU to a second wireless communications device.

Provided is a discrete Fourier transform (DFT)-spread orthogonal frequency division multiplexing (OFDM) transmission method and transmitter including a phase shifter configured to generate a pi / 2-binary phase shift keying (BPSK) symbol vector by phase-shifting a vector including M BPSK symbols, a DFT spreader configured to generate a DFT-spread pi / 2-BPSK symbol vector by spreading the pi / 2-BPSK symbol vector using an M-point DFT matrix, a circular extender configured to generate a circularly extended pi / 2-BPSK symbol vector by periodically extending the DFT-spread pi / 2-BPSK symbol vector, a frequency domain spectrum shaper configured to generate a frequency domain spectrum shaped pi / 2-BPSK symbol vector by multiplying each element of the circularly extended pi / 2-BPSK symbol vector by each element of a first shaping vector, and a subcarrier allocator configured to allocate the frequency domain spectrum shaped pi / 2-BPSK symbol vector to subcarriers in an allocated frequency range.

The present disclosure relates to signal processing methods and apparatus. One example method includes determining a first sequence {x(n)} based on a preset condition and a sequence {s(n)}, generating a reference signal of a first signal by using the first sequence, and sending the reference signal on a first frequency-domain resource. The preset condition is xn=y(n+M)modK, whereyn=A·ej×π×sn8,M∈{0, 1, 2, . . . , 5}, a length of the first sequence is K=6, n=0, 1, . . . , K−1, A is a non-zero complex number, and j=√{square root over (−1)}. The first signal is a signal modulated by using π / 2 binary phase shift keying (BPSK). The first frequency-domain resource comprises K subcarriers each having a subcarrier number of k, k=u+L*n+delta, L is an integer greater than or equal to 2, delta∈{0, 1, . . . , L−1}, u is an integer, and subcarrier numbers of the K subcarriers are numbered in ascending or descending order of frequencies.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate using π / 2 binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders for π / 2 BPSK modulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching between π / 2 BPSK and QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

The present invention discloses an integrated sensing and backscatter communication method and apparatus based on inverse scattering, relating to the field of wireless communication technologies. The method includes: determining a tag antenna mode pilot voltage component and a clutter tag structure combined pilot voltage component according to an open-circuit pilot received voltage and a short-circuit pilot received voltage generated by a receiving antenna based on a pilot signal; respectively determining a tag antenna mode reflection coefficient and a clutter tag structure combined reflection coefficient based on the tag antenna mode pilot voltage component and the clutter tag structure combined pilot voltage component by using a compressive sensing algorithm; transmitting a data signal to the receiving antenna by the tag using binary phase shift keying and collecting a data received voltage; and completing signal demodulation by using the data received voltage, the tag antenna mode reflection coefficient, and the combined reflection coefficient to obtain a bit mapping symbol of the data signal. By combining inverse scattering with modulating the tag impedance to implement backscatter communication, the performance of backscatter communication is improved.

Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to communicate usingπ2binary phase shift keying (BPSK) modulation according to extended coding rates. In some cases, the UE may receive configuration information that supports modulation orders forπ2 ⁢BPSKmodulation extended to include modulation orders otherwise only configured for quadrature phase shift keying (QPSK) modulation. Further, the UE may support dynamic switching betweenπ2 ⁢BPSKand QPSK modulation. For example, the UE may transmit or receive control signaling indicating a modulation order for an uplink transmission, where the UE or a network entity may determine which modulation scheme and order to use according to communication parameters associated with the uplink transmission, the UE, or both.

A blind LDPC code rate recognition method based on deep learning under correlated noise uses a multi-task learning strategy to achieve blind LDPC code rate recognition using deep learning (DL), and it consists of two stages: training and verification. In the training stage, LDPC codes with one code rate are selected from the code rate set to generate a codeword sequence. The codeword sequence is modulated by binary phase shift keying to generate a modulation sequence, and the modulation sequence is transmitted through a correlated noise channel to obtain a training data set. Then, a blind LDPC code rate recognition model under correlated noise is constructed using DL. Finally, the training data set is input into the model, and the model is trained using the adaptive moment estimation optimization algorithm. Training stops when the loss value converges or reaches the maximum number of training epochs to obtain an optimized model. In the verification stage, the modulation symbol sequence affected by correlated noise is used for blind LDPC code rate recognition using the trained model. The DL-based blind LDPC code rate recognition method of the present invention has better performance at low signal-to-noise ratios.

Examples of a 2´2 optical hybrid receiver for entanglement-assisted communication are disclosed indicating that the examples of the receiver have roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. Numerical findings indicated that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. In addition, findings indicated that using unequal priors for Binary Phase-Shift Keying (BPSK) provides roughly three times the information rate advantage over.

The present invention relates to a wireless communication method for suggesting a packet preamble structure for efficient communication in a wireless communication environment in which a legacy terminal and a non-legacy terminal are mixed, and a wireless communication terminal using the same. For this, the present invention provides a wireless communication method including: generating a packet including a first preamble and a second preamble, wherein a first symbol and a second symbol of the second preamble are modulated using binary phase shift keying (BPSK); and transmitting the generated packet and a wireless communication terminal using the same.

The technology of this disclosure relates to a signal modulating method, a signal demodulating method, a device, a storage medium, and a program product. In the signal modulating method according to a first aspect of this disclosure, a sending device modulates a bit sequence onto a plurality of subcarriers through binary phase shift keying (BPSK) constellation point mapping, dual carrier modulation (DCM), and a duplication (DUP) operation, where the plurality of subcarriers include a first group of subcarriers and a second group of subcarriers. Then, the sending device changes a phase of first data carried in the first group of subcarriers by 90 degrees or minus 90 degrees, and further generates a modulation signal based on the first data that is carried in the first group of subcarriers and whose phase has been changed and second data carried in the second group of subcarriers.

According to one embodiment, a method performed by a Distributed Unit (DU) includes generating modulation values corresponding to information bits based on a modulation compression technique. The method includes generating user plane (U-plane) data corresponding to the modulation value based on a shift operation corresponding to the modulation compression technique. The method includes transmitting a U-plane message including the generated U-plane data to a radio unit (RU) over a fronthaul interface. The modulation compression technique is arranged to perform the shift operation based on a specified first equation for binary phase shift keying (BPSK), and to perform the shift operation based on a specified second equation for a modulation technique other than BPSK.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may generate a phase-ramped modulated data stream with a set of phase-shift keying (PSK) modulated symbols, wherein a phase-ramped modulation is applied to the set of PSK modulated symbols in a pre-discrete-Fourier-transform (pre-DFT) domain. The network node may transmit, to a user equipment (UE), the phase-ramped modulated data stream. Numerous other aspects are described.

Examples of a 2´2 optical hybrid receiver for entanglement-assisted communication are disclosed indicating that the examples of the receiver have roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. Numerical findings indicated that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. In addition, findings indicated that using unequal priors for Binary Phase-Shift Keying (BPSK) provides roughly three times the information rate advantage over.

An apparatus, e.g. an ambient internet of things (AIoT) device, comprising an energy storage 704, an antenna 700, a modulator 708, e.g. a binary phase shift keying (BPSK) modulator or an on off keying (OOK) modulator, connected to the antenna 700 and an amplifier 710, e.g. a reflection amplifier. A first switch SW1 selectively connects or disconnects the amplifier 710 to the energy storage 704 and a second switch SW2 selectively connects or disconnects the modulator 708 to the amplifier 710. The first switch SW1 may selectively connect or disconnect a bias of the amplifier 710 to the energy storage 704. The apparatus may receive, from a second apparatus, e.g. a session control unit, a request to operate the apparatus in a first or a second transmission mode wherein a response signal is transmitted by backscattering an activation signal without amplification or with amplification, and the apparatus may transmit a control signal to the first switch SW1 to disconnect or connect the amplifier 710 to the energy storage 704 and a control signal to the second switch SW2 to disconnect or connect the modulator 708 to the amplifier 710.

Examples of a 2´2 optical hybrid receiver for entanglement-assisted communication are disclosed indicating that the examples of the receiver have roughly 10% lower error probability compared to previously proposed optical parametric amplifier-based receivers for more than 10 modes. Numerical findings indicated that surpassing the Holevo and Homodyne capacities does not require a large number of signal-idler modes. In addition, findings indicated that using unequal priors for Binary Phase-Shift Keying (BPSK) provides roughly three times the information rate advantage over.

The invention relates to a binary phase shift keying modulation method and system based on an optical frequency comb. The method comprises the steps that S1, the optical frequency comb and a to-be-modulated emission signal are acquired; s2, splitting a series of frequency components of the optical frequency comb through an array waveguide grating to obtain a plurality of monochromatic light carrier components; s3, performing collimation and power stabilization on each single-color carrier component to obtain a single-color light modulation carrier component; s4, taking each monochromatic light modulation carrier component as a sub-channel carrier channel, independently performing binary phase shift keying modulation on each transmitting signal to modulate the transmitting signal to the corresponding sub-channel carrier channel, and obtaining a modulated optical signal component; and S5, performing light combination processing on all the modulated light signal components through the array waveguide grating to obtain a spatial emission wavelength division multiplexing modulation signal. According to the invention, dense wavelength division multiplexing modulation emission optical link signals with more channels, wider modulation bandwidth, better channel synchronism and higher Doppler frequency shift consistency can be generated.

Various aspects of the present disclosure relate to MCS determination for PUSCH transmission. In an aspect, a UE determines a first modulation and coding scheme (MCS) index table based on a physical uplink shared channel (PUSCH) type of a PUSCH transmission. A number of entries supporting π / 2 binary phase shift keying (BPSK) modulation in the first MCS index table is larger than a number of entries supporting π / 2 BPSK modulation in a second MCS index table. The first MCS index table and the second MCS index table are applied for a same PUSCH type. The UE transmits, to a network entity, the PUSCH transmission using a modulation order and a target code rate. The modulation order and the target code rate are determined based on the first MCS index table and an indication indicative of an MCS index for the PUSCH transmission.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of one or more orthogonal cover code (OCC) parameters associated with an OCC-based physical uplink shared channel (PUSCH) multiplexing scheme using π / 2 binary phase shift keying (BPSK) modulation. The UE may transmit a PUSCH communication based at least in part on the one or more OCC parameters and by using the π / 2 BPSK modulation. Numerous other aspects are described.

A service device (e.g., a user equipment (UE), a new radio NB (gNB), or other network component or network management component) can process or generate a Downlink Control Information (DCI) that schedules a Physical Uplink Shared Channel (PUSCH) transmission in a PUSCH. The PUSCH transmission can be generated based on a Demodulation Reference Signal (DMRS) according to a Discrete Fourier Transform (DFT) spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform in uplink. A sequence of the DMRS can be generated based on a Gold sequence and a Pi / 2 Binary Phase-Shift Keying (BPSK) modulation.

The application discloses a digital air computing method based on binary complement coding, comprising the following steps: linear scaling and down rounding quantization are performed on a continuous analog signal to be calculated at a distributed device end, and the quantized value is converted into a binary complement sequence with a fixed length; a decoder is designed at a base station end based on a superposition result of each binary bit; each bit of the binary complement sequence is subjected to binary phase shift keying (BPSK) modulation, a frequency band is divided into a plurality of subcarriers by using orthogonal frequency division multiplexing (OFDM) technology, and a plurality of devices superimpose transmission on the same subcarrier for the same binary bit; equal power allocation is performed according to the weight priority of the binary bit, a transmission signal is preprocessed based on channel state information by using a truncated channel inversion strategy; a linear minimum mean square error (LMMSE) detector is applied to each subcarrier received signal at the base station end to estimate a superposition result; a multi-subcarrier mean square error minimization problem is constructed, and a greedy algorithm is used to optimize an active device set and a transmission power factor; and the application significantly improves the real-time performance and reliability of multi-device cooperative computing in actual application.

According to an embodiment, a method performed by a distributed unit (DU) may comprise generating, based on a modulation compression scheme, a modulation value corresponding to information bits. The method may comprise generating, based on a shifting operation corresponding to the modulation compression scheme, user plane (U-plane) data corresponding to the modulation value. The method may comprise transmitting, to a radio unit (RU) through a fronthaul interface, a U-plane message comprising the generated U-plane data. In a case of binary phase shift keying (BPSK), the modulation compression scheme may be set to perform the shifting operation based on a designated first equation. In a case of non-BPSK, the modulation compression scheme may be set to perform the shifting operation based on a designated second equation.

Disclosed are a method and an apparatus for extracting a target on the basis of an FMCW radar. The method for extracting a target on the basis of an FMCW radar comprises the steps of: (a) transmitting a radar transmission signal, the radar transmission signal being a signal to which binary phase shift keying (BPSK) modulation has been performed on the basis of a first binary code; (b) obtaining a radar reception signal reflected by a target; (c) generating a ghost target signal by multiplying the reception signal by a second binary code; and (d) extracting an actual target signal by removing the ghost target signal from the reception signal.