A method for transmitting a signal, and an apparatus, a storage medium, and a user terminal are provided. The method includes: determining a plurality of baseband signals of Component Carriers (CC); selecting a plurality of phase rotation factors and recording a number of times of selection by adding one each time of selection; determining a candidate signal and a Peak to Average Power Ratio (PAPR) of the candidate signal, wherein in response to the PAPR being greater than or equal to a preset threshold and the number of times of selections not reaching a preset number of times, reselecting phase rotation factors and re-determining another candidate signal and a PAPR of the another candidate signal, until a PAPR is less than the preset threshold or the number of times of selections reaches the preset number of times; and transmitting the candidate sign.

The application provides a short training sequence design method and apparatus. The method includes: determining a short training sequence, where the short training sequence may be obtained based on an existing sequence, and the short training sequence with comparatively good performance may be obtained through simulation calculation, for example, by adjusting a parameter, and sending a short training field on a target channel, where the short training field is obtained by performing inverse fast Fourier transformation IFFT on the short training sequence, and a bandwidth of the target channel is greater than 160 MHz.

Disclosed herein is a method for transmitting a demodulation reference signal for an uplink control signal in a wireless communication system. Specifically, the method performed by a terminal includes: generating a low peak to average power ratio (PAPR) sequence based on a length-6 sequence; generating a sequence used for the demodulation reference signal based on the low PAPR sequence; and transmitting, to a base station, the demodulation reference signal based on the sequence used for the demodulation reference signal, in which the length-6 sequence has an 8-phase shift keying (PSK) symbol as each element of a sequence.

An access point (AP), a station (STA), and a wireless communication method are provided. The wireless communication method includes configuring, by an access point (AP), an aggregated physical layer (PHY) protocol data unit (A-PPDU) to a set of stations (STAs), wherein the A-PPDU comprises at least one first PPDU and at least one second PPDU, and phase rotation is applied to the A-PPDU according to at least one bandwidth associated with at least one of the A-PPDU, the at least one first PPDU, and the at least one second PPDU. This can solve issues in the prior art, apply phase rotation to an A-PPDU, improve peak-to-average power ratio (PAPR) of the A-PPDU, achieve extremely high throughput (EHT), provide a good communication performance, and/or provide high reliability.

A method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present invention, comprise: iteratively mapping a PUCCH sequence to each of resource blocks (RBs) within an interlace; and transmitting a PUCCH on the interlace, wherein a phase shift (PS) value of the PUCCH sequence may be changed on the basis of an RB index of each of the RBs.

A communication device for handling a Peak-to-Average Power Ratio (PAPR), includes a transforming module, configured to perform a first plurality of inverse fast Fourier transforms (IFFTs) on a plurality of coefficients in a scene according to a first inverse fast Fourier transform (IFFT) size and the scene, to obtain a plurality of results; a processing module, coupled to the transforming module, configured to obtain a plurality of norms of the plurality of results, and to obtain a plurality of values of the plurality of coefficients; and a transmitting module, coupled to the processing module, configured to perform a second plurality of IFFTs on a plurality of frequency-domain signals according to a second IFFT size, the plurality of coefficients with the plurality of values and the scene, to obtain a plurality of time-domain signals, wherein the second IFFT size is greater than the first IFFT size.

Methods, apparatus, and systems for reducing Peak Average Power Ratio (PAPR) in signal transmissions are described. In one example aspect, a wireless communication method includes determining, for a time-domain sequence x(i), an output sequence s(k). The output sequence s(k) is an inverse Fourier transform of a frequency-domain sequence S(j), and S(j) represents a dot-multiplication of a frequency-domain sequence Y(j) corresponding to the time-domain sequence x(i) and a frequency-domain sequence Z(j) corresponding to a three-coefficient function associated with $\frac{\sqrt{2}}{2},$
1, and $\frac{\sqrt{2}}{2}.$
The method also includes generating a waveform using the output sequence s(k), where i is from 0 to I−1, j is from 0 to J−1, k is from 0 to K−1, and I<J<=K.

A satellite transmitter includes K transmission antenna elements, a multiplexing unit configured to multiplex each of K digital signals on a frequency axis and then convert the multiplexed digital signals to time-domain digital signals, a digital-to-analog converter, a PAPR calculation unit configured to calculate a PAPR for each of the K digital signals, a beam-to-beam relative phase calculation unit configured to calculate a beam-to-beam relative phase for suppressing a peak power of the transmission antenna elements, an excitation coefficient calculation unit configured to calculate K updated excitation coefficients based on the beam-to-beam relative phase and the beam-formation excitation coefficient, and an excitation coefficient multiplication unit configured to generate the digital signals of a frequency domain to be output to the multiplexing unit by multiplying a received relay signal by each of the K updated excitation coefficients in the frequency domain.

This disclosure provides methods, devices, and systems for a wireless communication device to perform signal phase rotation. In some implementations, the wireless communication device may determine a number of phase rotation parameters to be applied to a number of tones of a transmission signal. In some aspects, each of the phase rotation parameters indicates a phase rotation to be applied to each of the tones according to a carrier index range for each of the tones and a bandwidth mode for the transmission signal. In some implementations, the wireless communication device may apply the phase rotation parameters to respective ones of the tones according to the specified phase rotations and the carrier index ranges, and transmit the transmission signal from the wireless communication device according to the applied phase rotation parameters.

Duplicated physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmission is described for a wireless device with reduced peak-to-average power ratios (PAPR). One example includes obtaining a first sub-PPDU from to PPDU that includes a data field with data content. A second sub-PPDU may also be obtained by duplicating the PPDU including the data content of the PPDU. At least one of a phase rotation, a phase offset, or a phase ramp is applied to at least a portion of a second set of sub-carrier of a wideband channel. The first sub-PPDU is transmitted on a first set of sub-carriers of the wideband channel and the second sub-PPDU is transmitted on the second set of sub-carriers of the wideband channel.