28 results about "Power delay profile" patented technology

A disclosed computer-implemented method may include (1) receiving a channel estimation signal comprising a plurality of frequency domain signals, each frequency domain signal corresponding to an antenna in a plurality of antennas, a port in a plurality of ports, and a demodulation reference signal sequence, (2) for each frequency domain signal, (A) converting the frequency domain signal to a time domain signal, and (B) determining a power level of the time domain signal, (3) determining, for each port in the plurality of ports (a) a sum of the power levels of the time domain signals corresponding to the port, each antenna in the plurality of antennas, and the DMRS sequence, and (b) based on the determined sum corresponding to the port, measuring (i) a pre-equalization signal-to-interference-plus noise ratio, and (ii) a power delay profile (PDP). Various other systems and methods are also disclosed.

A technique for wireless communication is disclosed. In one aspect, a receiving device receives from a network entity a request to report a power delay profile (PDP) similarity measure for a first positioning frequency layer on a first component carrier and a second positioning frequency layer on a second component carrier; determines a first PDP of a first reference signal received on the first positioning frequency layer and a second PDP of a second reference signal received on the second positioning frequency layer; determines a PDP similarity measure based on the first PDP and the second PDP; and transmits the PDP similarity measure to the network entity.

According to various examples, a receiver is described, comprising a memory and a processor, the processor being configured to receive, for each of a plurality of receive antennas, a pilot signal via the receive antenna, wherein the pilot signal has a component for each of a plurality of subcarriers, generate, for each of the plurality of receive antennas, an intermediate power delay profile estimation processing result by processing the pilot signal received via the receive antenna by one or more first neural network layers combining the components of the pilot signal received via the receive antenna for the sub-carriers, generate a combined intermediate power delay profile estimation processing result by combining the intermediate power delay profile estimation processing results generated for the receive antennas and determine a power delay profile estimate by processing the combined intermediate power delay profile processing estimation result by one or more second neural network layers.

This invention discloses a channel estimation device based on power delay spectrum estimation. First, resource particles for pilots are extracted from the frequency domain resource grid for different physical channels, and LS channel estimation is performed with the generated local pilots. Then, according to different physical channels, two strategies are employed: segmented calculation and inverted edge data, transforming the data into a power of 2 number of points. A radix-2 IFFT fast algorithm is used to convert the channel estimate at the pilot to the delay domain. A power delay spectrum window is calculated in the delay domain, and noise reduction processing is applied to the channel estimate at the pilot in the delay domain. Finally, a radix-2 FFT fast algorithm is used to interpolate and obtain the channel estimate in the full frequency domain. The data is then integrated and output according to different physical channels. This invention balances performance and implementation complexity, handles delay and hardware resources, improves the system's versatility, compatibility, portability, and scalability, and effectively solves the channel estimation problem based on FPGA or ASIC implementations.

According to various examples, a receiver is described, comprising a memory and a processor, the processor being configured to receive, for each of a plurality of receive antennas, a pilot signal via the receive antenna, wherein the pilot signal has a component for each subcarrier of a plurality of subcarriers, generate, for each of the plurality of receive antennas, an intermediate power delay profile estimation processing result by processing the pilot signal received via the receive antenna by one or more first neural network layers combining the components of the pilot signal received via the receive antenna for the sub-carriers, generate a combined intermediate power delay profile estimation processing result by combining the intermediate power delay profile estimation processing results generated for the receive antennas and determine a power delay profile estimate by processing the combined intermediate power delay profile processing estimation result by one or more second neural network layers.

An operation method of user equipment configured to perform wireless communication with a base station includes receiving a positioning reference signal (PRS) from the base station, calculating a power delay profile (PDP) based on the PRS, detecting at least one path by performing a path search operation based on the PDP, the at least one path including a first path, the path search operation including detecting a first PDP index as the first path, the first PDP index having a value corresponding to a first power of a first threshold PDP or more, and the first threshold PDP being based on a peak power of the PDP, and measuring a reference signal time difference (RSTD) based on the first path.

An apparatus for use in a RAN node includes processing circuitry. To configure the RAN node for signal estimation in an O-RAN network, the processing circuitry detects, at a distributed unit (DU) function of the RAN node, a compressed sounding reference signal (SRS). The compressed SRS is based on a received SRS. Partial decompression of the compressed SRS is performed to generate a partially decompressed signal. The partial decompression is based at least on a weight matrix associated with the compressed SRS. A plurality of power delay profile (PDP) signals is generated based on the partially decompressed signal. Averaging of the plurality of PDP signals is performed to generate an output PDP signal corresponding to the received SRS.

One aspect of this disclosure relates to a terminal comprising: a receiving unit that receives setting information related to the measurement of at least one of a channel impulse response (CIR), a power delay profile (PDP), and a delay profile (DP), i.e., setting information including at least one parameter such as an additional path for AI-based positioning and a relative time difference; and a control unit that applies AI-based positioning model inference and performs measurements based on the setting information. According to one aspect of this disclosure, appropriate reporting related to AI / ML-based positioning can be performed.

An operating method of a wireless communication device may include obtaining a first pilot signal and a second pilot signal, estimating an autocorrelation in a frequency domain of the first pilot signal based on a power delay profile of the second pilot signal, generating a channel estimation weight based on the autocorrelation, and estimating a channel of a data signal based on the channel estimation weight and the first pilot signal.

To provide a method based on channel state information (CSI), a device, and a medium.SOLUTION: In an exemplary method, a sensing response device obtains CSI data based on channel estimation and generates power delay profile (PDP) data based on the CSI data. Then, the sensing response device feeds back a part of the PDP data in the generated PDP data. Therefore, feedback overheads are reduced. In addition, sensing performance is ensured to some extent.SELECTED DRAWING: Figure 14

A radio-determined environment sensing system includes: (a) a first transmitter configured to transmit a pilot radio signal; (b) at least one receiver configured to receive a mixture of signals including the pilot signal and reflections thereof; and (c) at least one control unit configured to receive the mixture of signals from the UE modules and process them to generate channel estimates and therefrom to extract the taps contained. The first transmitter and the at least one receiver are static over a certain time period. The control unit is configured to operate a processing procedure to generate at least one power delay profile (PDP) tap from the channel estimate, and evaluate changes in the environment from information contained in a calculated measurement vector zk.

Example embodiments of the present disclosure relate to apparatuses, methods, and storage media for measurement reporting. In one method, a first apparatus performs one or more measurements of positioning reference signals. The first apparatus obtains, based on the one or more measurements, at least one of: a first set of estimates of a power delay profile (PDP), or a second set of estimates of a channel impulse response (CIR). The first apparatus performs differential quantization for at least one of: a subset of the first estimates from the first set of estimates, or a subset of the second estimates from the second set of estimates. Subsequently, the first apparatus transmits, e.g., via a plurality of per-path reference signal received power (RSRPP) messages, a measurement report to a second apparatus, the measurement report including at least one of: the quantized first.

A method (1000) for calibration of an antenna array is provided. The method comprises deriving (1100) at least one Wiener filter coefficient for the antenna array based on at least one power delay profile characteristic related to the antenna array and at least one signal-to-noise ratio related to the antenna array. The method further comprises estimating (1200) at least one transmitter parameter and / or at least one receiver parameter using the at least one Wiener filter coefficient for the antenna array, and calibrating (1300) the antenna array based on the at least one transmitter parameter and / or the at least one receiver parameter.

The present specification describes a terminal device comprising: means for receiving, from a network node, information indicating a power granularity at which a power measurement of a power delay spectrum should be reported; means for determining a power delay spectrum (PDP) based on the measurement of the reference signal; means for determining, for a plurality of time delay intervals associated with the determined PDP, indices of quantized power measurements indicative of the respective time delay intervals, where the indices are determined based on: (i) power measurements determined for the respective time delay intervals based on the determined PDP, (ii) information indicative of power granularity, and (iii) a predefined rule for determining the index; and means for sending the index determined for the plurality of time delay intervals to the network node.

An apparatus for use in a RAN node includes processing circuitry. To configure the RAN node for signal estimation in an O-RAN network, the processing circuitry detects, at a distributed unit (DU) function of the RAN node, a compressed sounding reference signal (SRS). The compressed SRS is based on a received SRS. Partial decompression of the compressed SRS is performed to generate a partially decompressed signal. The partial decompression is based at least on a weight matrix associated with the compressed SRS. A plurality of power delay profile (PDP) signals is generated based on the partially decompressed signal. Averaging of the plurality of PDP signals is performed to generate an output PDP signal corresponding to the received SRS.

A method performed by user equipment in a wireless communication system includes receiving a plurality of reference signals from a base station, estimating a power delay profile (PDP) corresponding to each of the plurality of reference signals, and merging the PDPs corresponding to at least two reference signals, having a quasi-co-location (QCL) relationship, among the plurality of reference signals.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for receiving or calculating an interference parameter based, at least in part, on one or more estimated power delay profiles (PDPs), one or more precoding rules, and one or more kernels, the one or more estimated PDPs being associated with one or more communication channels. The UE may receive a configuration for applying the interference parameter to a transmission having a power near a compression point of a power amplifier to reduce transmission non-linearities. Numerous other aspects are described.

A wireless communication device for channel estimation and a method of operation of the wireless communication device are provided. A method of operation of a wireless communication device may include obtaining a first pilot signal and a second pilot signal, estimating an autocorrelation in a frequency domain of the first pilot signal based on a power delay profile of the second pilot signal, generating a channel estimation weight based on the autocorrelation, and estimating a channel of the data signal based on the channel estimation weight and the first pilot signal.

The scheme discloses a PDP resampling shift algorithm and a PDP filtering method and device, filtering equipment and a storage medium, and the relationship between the power delay profile (PDP) before and after timing adjustment and the timing adjustment amount Delta and the resampling coefficient are obtained according to the PDP resampling shift algorithm; when the sampling point offset of the current and next subframes is not an integer, the timing adjustment amount Delta can not be an integer, so that the timing position of the current and next subframes can be matched by cyclic shift alignment through the timing adjustment amount Delta, and the applicability is stronger; the historical PDP is resampled, so that the filtered historical PDP can include all important path information, thereby reflecting the real channel state, being closer to the real PDP of the current subframe, and improving the accuracy of channel estimation.

The invention discloses a power delay spectrum estimation method based on frequency domain noise whitening, which is applied to a power line communication system. According to the method, in order to solve the problems that power line channel frequency selective noise is high and a special silence period is lacked, the noise power spectral density is directly estimated from a received signal through frequency domain smoothing processing, a frequency domain whitening filter is designed according to the noise power spectral density to conduct whitening and normalization processing on channel response, the frequency selective noise is converted into flat noise, and the frequency selective noise is obtained. And a power delay spectrum with a substantially reduced noise floor is generated. On the basis, multipath components are accurately recognized through peak detection and parameter estimation, signals are reconstructed to separate and calculate signal and noise power, and finally high-precision signal-to-noise ratio estimation is achieved. According to the method, a silent period is not needed, frequency selective noise can be effectively resisted, and the accuracy of multipath parameter and signal-to-noise ratio estimation is remarkably improved.

The application discloses a wireless communication system scene adaptive multipath time delay alignment method and device, the method uses SISO channel detection system to measure channel data, adopts a rectangular or RRC shaping filter to generate a CAZAC oversampling sequence as a template function, calculates the cross-correlation matrix of the IQ signal and the template function, calculates the noise threshold based on the median power and false alarm rate, executes dynamic threshold noise filtering, generates the cross-correlation matrix after noise reduction, and completes the preliminary estimation of the time domain impulse response; the SAGE algorithm is used to extract the multipath time delay and complex gain from the cross-correlation matrix; the channel impulse response is drawn to draw a power delay profile (PDP); and the PDP is aligned in combination with the geographic position information of the transceiver during actual measurement. The application solves the defects of traditional alignment in a bad scene, improves the statistical modeling accuracy, and can effectively align the multipath time delay through experiment verification, thereby providing reliable support for channel modeling.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a configuration for receiving or computing interference parameters based, at least in part, on one or more estimated power delay profiles (PDPs), one or more precoding rules, and one or more kernels, the one or more estimated PDPs being associated with one or more communication channels. The UE may receive a configuration for applying the interference parameter to transmissions with power close to a compression point of a power amplifier to reduce transmit non-linearity. Numerous other aspects are described.

A method of sensing occupancy of a vehicle using ultra-wide band (UWB) communication includes transmitting and receiving a UWB signal within the vehicle, obtaining channel impulse response (CIR) data corresponding to the UWB signal as received within the vehicle, calculating power delay profile (PDP) results for the CIR data, determining, based on the calculated PDP results, the occupancy of the vehicle, and at least one of generating, storing, and transmitting occupancy sensing results based on the determined occupancy of the vehicle. The occupancy sensing results include data that indicates at least one of a presence of occupants within the vehicle, a number of occupants within the vehicle, and locations of occupants within the vehicle.

Aspects described herein relate to a user equipment (UE) or other device receiving, based on a maximum number of transmission configuration indicator (TCI) states, an indication of one or more TCI states for coherent joint transmission (CJT) from at least a portion of multiple transmission / reception points (TRPs) that can be configured for the UE. One or more downlink reference signals can be received based on the indication and from at least the portion of the multiple TRPs, and a power delay profile (PDP) or Doppler spectrum for channel estimation for at least a portion of the one or more TCI states can be derived based on the one or more downlink reference signals. Other aspects relate to transmitting the indication of the TCI states and / or the reference signals.

Disclosed are techniques for wireless communication. In an aspect, a receiver device receives, from a network entity, a request to report a power delay profile (PDP) similarity metric for a first positioning frequency layer on a first component carrier and a second positioning frequency layer on a second component carrier; determines a first PDP for a first reference signal received on the first positioning frequency layer and a second PDP for a second reference signal received on the second positioning frequency layer; determines the PDP similarity metric based on the first PDP and the second PDP; and transmits, to the network entity, the PDP similarity metric.

Methods and apparatuses for noise removal are provided. A noise removal method may determine multiple channel impulse responses (CIRs) and multiple power delay profiles (PDPs) corresponding to the CIRs collected at multiple spatial-separated positions. Initially, the noise removal method may apply a dynamic noise threshold based on a false-alarm probability to generate an initial denoised signal. Thereafter, the noise removal method may apply a delay window to the initial denoised signal to generate an intermediate denoised signal. Finally, the noise removal method may perform a persistence check on the intermediate denoised signal to generate the final denoised signals, assuming a multiple component present in multiple CIRs when the transmitter or receiver moves in a small distance which is not true for the random noise. The false alarm probability, the delay window, and / or the persistence check may be dynamically optimized for a specific environment.

The application provides a communication synchronization method and device and a computer storage medium, and applies to the technical field of communication. The method comprises the following steps: obtaining N power delay profiles (PDPs) of a target channel in sequence according to a measurement time interval; determining a first clock deviation value according to a target relative time delay of a first PDP among the N PDPs, a target relative time delay of an Nth PDP, and a time interval between the first PDP and the Nth PDP; correcting the relative time delay in each PDP according to the first clock deviation value; and controlling a sending end and a receiving end of the target channel to perform communication synchronization based on the corrected relative time delay. The method corrects the relative time delay in each PDP obtained based on the first clock deviation value calculated in a period of time, so as to obtain an accurate relative time delay, realize communication synchronization of the sending end and the receiving end, and improve the synchronization precision of the communication synchronization method.

A communication device includes a transceiver circuit and a controller circuit. The transceiver circuit is configured to receive packets from electronic devices. The controller circuit is configured to: parse the packets to obtain power delay profile of each of the electronic devices; set a guard interval of each of the electronic devices according to the power delay profile; divide the electronic devices into a first group of devices and a second group of devices; and sending, through the transceiver circuit, a trigger frame to at least one group of devices in the first or the second group of devices, such that the at least one group of devices upload data to the transceiver circuit.