Abstract: A sensing method includes determining, by a first communication apparatus, first information. The first information indicates a pulse repetition interval (PRI). The sensing method also includes sending, by the first communication apparatus, the first information to a second communication apparatus. The first information is used by the second communication apparatus to send a reference signal, and a periodicity of the reference signal in time domain is less than or equal to the PRI. The sensing method further includes receiving, by the first communication apparatus, the reference signal from the second communication apparatus. The sending method additionally includes sensing, by the first communication apparatus, a to-be-sensed target based on the reference signal.

Abstract: 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.

Abstract: A method includes: Two communication parties exchange a control message, for indicating a frequency band overlapping rate between adjacent channels in a channel set used for frequency band stitching; and when the frequency band overlapping rate belongs to an overlapping rate set S1, the channel set is in an in-sequence channel order; or when the frequency band overlapping rate belongs to an overlapping rate set S2, the channel set is in an out-of-sequence channel order. According to this application, a better compromise between sending time and transmit power in a frequency band stitching process can be implemented. This application is applied to a UWB-based WPAN system, a sensing system, or the like, including 802.15 series protocols, for example, 802.15.4ab or a next-generation standard of 802.15.4ab. This application may be further applied to a WLAN system supporting 802.11 series protocols.

Abstract: A sensing method may include a sensing transmit end that determines phase modulation and control information of a first sensing signal, where the phase modulation and control information is used to control a phase of the first sensing signal to continuously vary over time; and the sensing transmit end sends the first sensing signal to a sensing target.

Abstract: A packet data protocol unit (PDPU) transmission method includes: a communication apparatus generates and sends a PPDU, where the PPDU includes a first segment and a second segment. Transmission frequency bands of the two segments are different, and an inactive segment exists between the two segments. The communication apparatus does not transmit an ultra-wideband (UWB) pulse within a duration of the inactive segment.

Abstract: An error compensation parameter calculation method and an apparatus. The method includes: a first node obtains first measurement information of a first measurement object, where the first measurement information is obtained by measuring the first measurement object according to a first measurement method; the first node obtains first status information of the first measurement object; and the first node calculates an error compensation parameter based on the first measurement information and the first status information, where the error compensation parameter is used to correct measurement information that is of a measurement object and that is obtained through measurement according to the first measurement method. In this way, the first node calculates the error compensation parameter to compensate for a system error of sensing and communication, improve accuracy of the measurement information of the measurement object, and improve communication performance.

Abstract: Embodiments of this application provide a data transmission method, a communication apparatus, and a communication system. An example method includes: A first apparatus sends first configuration information to a plurality of second apparatuses, where the first configuration information is used for sending point cloud data on a same air interface resource by the plurality of second apparatuses. The first apparatus receives point cloud data from at least two of the plurality of second apparatuses. In this solution, the plurality of second apparatuses send the point cloud data to the first apparatus on the same air interface resource.

Abstract: This application discloses a method includes: determining a first frequency domain resource, where frequency baselines formed by the first frequency domain resource meet a P-level redundancy distribution. Sending a sensing signal on the first frequency domain resource. The P-level redundancy distribution meets a first condition and a second condition. The first condition includes: The frequency baselines formed by the first frequency domain resource include a frequency baseline of a first length; and the first length is k*length of a minimum frequency baseline, k is a positive integer belonging to [1, K], K is a ratio of a length of a maximum frequency baseline to the length of the minimum frequency baseline. The second condition includes: In the frequency baselines formed by the first frequency domain resource except largest (P?1) and smallest (P?1) frequency baselines, a quantity of redundancy distribution times is greater than or equal to P.

Abstract: This application provides a sensing method and an apparatus, to implement sensing through frequency stitching. A second device sends a first message, and a first device receives the first message. The first message includes first information indicating a feedback policy for a sensing result corresponding to a plurality of frequency bands, and the plurality of frequency bands are used for frequency stitching. The first device sends a second message to the second device based on the first message. The second message includes a sensing result corresponding to at least one of the plurality of frequency bands. In this solution, reliability of implementing sensing through frequency stitching can be improved, and sensing performance of a UWB system can be improved.

Abstract: A sensing communication method and an apparatus are provided, and may be applied to a WPAN system or a sensing system that supports UWB, for example, a wireless local area network system that supports a 802.15.4a protocol, a 802.15.4z protocol, a 802.15.4ab protocol, or the like in 802.15 series protocols. The method includes: A sensing requester sends a sensing request, where a MAC payload of the sensing request includes sensing initiator address information; and a communication apparatus that receives the sensing request forwards the sensing request when determining that an address of the communication apparatus does not match the sensing initiator address information; or the communication apparatus that receives the sensing request parses the sensing request when determining that the address of the communication apparatus matches the sensing initiator address information.

Abstract: A method for sensing sneezing based on a wireless signal includes obtaining a wireless signal, where the wireless signal propagates in space including a first object. Doppler estimation is performed on the wireless signal, to obtain Doppler information of the wireless signal. The Doppler information of the wireless signal may be used for indicating impact of the first object on a frequency of the wireless signal. Whether the first object is sneeze droplets is determined based on the Doppler information of the wireless signal.

Abstract: 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.

Abstract: An example method includes: A first communication apparatus and a second communication apparatus determine N target frequencies. The first communication apparatus sends a sensing signal to the second communication apparatus on the N target frequencies. The second communication apparatus performs angle measurement based on the sensing signal. The N target frequencies belong to a candidate frequency set that includes M candidate frequencies, 1<N<M, and a least common multiple of processed angle measurement ranges corresponding to the N target frequencies is greater than a preset angle measurement range, or the least common multiple of the processed angle measurement ranges corresponding to the N target frequencies is greater than or equal to a least common multiple of processed angle measurement ranges corresponding to any N candidate frequencies in the candidate frequency set.

Abstract: A transmitting end determines a transmitted waveform sequence set, where the transmitted waveform sequence set includes N sequences, the transmitted waveform sequence set includes a sequence having an aperiodic ZCZ, and a sequence length of the sequence is Q. The transmitting end sends Q pulse bursts to a receiving end based on the N sequences, where each pulse burst includes N pulses, a jth pulse in an ith pulse burst in the Q pulse bursts corresponds to an ith element in a jth sequence in the N sequences, 1?i?Q, and 1?j?N.

Abstract: A sensing-based communication method and an apparatus are provided, which are applied to a UWB-based WPAN system, for example, the 802.15.4a protocol, the 802.15.4z protocol, the 802.15.4ab protocol, or the like in 802.15 series protocols; and may be further applied to a WLAN system, a sensing system, and the like in 802.11 series protocols including a next-generation Wi-Fi protocol of 802.11ax like 802.11be, Wi-Fi 7, or EHT, and a next generation of 802.11 be like Wi-Fi 8, or UHR. A transmit end obtains control information, and sends a sensing signal based on the control information. Correspondingly, a receive end obtains the control information, and performs processing based on the control information. The control information indicates M cyclic 10 shift bit quantities corresponding to M sequences, and at least two relative cyclic shift bit quantities in relative cyclic shift bit quantities between adjacent sequences in the M sequences are different.

Abstract: A ranging method receives, by a first communication apparatus from a second communication apparatus, a first ranging signal and information corresponding to a second ranging signal, wherein the information indicates a time domain sequence or a frequency domain sequence of the second ranging signal, the time domain sequence or the frequency domain sequence is determined based on channel state information obtained by the first communication apparatus through measurement, and the first ranging signal is a signal formed after the second ranging signal sent by the second communication apparatus passes through a channel. Ranging is performed based on the first ranging signal and the time domain sequence or the frequency domain sequence of the second ranging signal.

Abstract: The embodiments of this application disclose a communication method, a communication apparatus, and a computer-readable storage medium. The embodiments of this application are applied to a wireless local area network system supporting 802.11 series protocols such as a next-generation Wi-Fi protocol of IEEE 802.11ax like 802.11be, 802.15.4z, 802.15.4ab, Wi-Fi 7, or EHT, and a next generation of 802.11be like Wi-Fi 8, and may be further applied to an ultra-wideband UWB-based wireless personal area network system and a sensing system. The method includes generating a transmit signal, where a peak value of a first sidelobe of the transmit signal falls within a first peak value range. The method further includes sending the transmit signal, where the transmit signal is used for ranging, angle measurement, or Doppler measurement.

Abstract: Frequency channel numbers used for sensing are determined from M sensing resource blocks; and a sensing signal is sent on the frequency channel numbers used for sensing. The M sensing resource blocks are determined from M1 candidate resource blocks, and include a 1st candidate resource block and an M1th candidate resource block in the M1 candidate resource blocks; and a quantity of frequency channel numbers included in each of the M sensing resource blocks is K.

Abstract: A communication method and a communication apparatus, wherein the method includes: A first device determines path parameter group search range information and first information, where the first information indicates K path parameter groups, and K is an integer greater than 0; and the first device sends the path parameter group search range information and the first information to a second device, where the path parameter group search range information is used to correct the K path parameter groups, and K corrected path parameter groups are used for channel estimation.

Abstract: A data transmission method and apparatus, and relates to the communication field. In the method, after obtaining a path parameter of each of at least one communication path between a first device and a second device, the first device may demodulate first data based on a pilot and the path parameter of each communication path. In other words, when demodulating the first data, the first device may refer to not only the pilot but also the path parameter of each communication path. The path parameter of each communication path can assist in demodulating the first data. When the path parameter of each communication path assists in demodulating the first data, there may be no need for too many pilots. Therefore, a resource occupied by the pilot can be reduced.