45 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.

The invention discloses a scene-adaptive multipath time delay alignment method and device for a wireless communication system, and the method comprises the steps: employing an SISO channel detection system to actually measure channel data, employing rectangular or RRC shaping filtering to generate a CAZAC oversampling sequence as a template function, calculating a cross-correlation matrix of an IQ signal and the template function, and enabling the CAZAC oversampling sequence to serve as the template function; a noise threshold is calculated based on the median power and the false alarm rate, dynamic threshold filtering is executed, a cross-correlation matrix after denoising is generated, and preliminary estimation of the time domain impulse response is completed; extracting multipath time delay and complex gain from the cross-correlation matrix by using an SAGE algorithm; drawing a power delay spectrum PDP for the channel impulse response; and performing alignment operation on the PDP in combination with the geographical location information of the transceiver during actual measurement. According to the method, the defect of traditional alignment in a severe scene is overcome, the statistical modeling accuracy is improved, the multipath time delay can be effectively aligned through experimental verification, and reliable support is provided for channel modeling.

Disclosed is a method comprising receiving, by a repeater, a set of symbols; transmitting, by the repeater, a subset of the set of symbols via a beam with a plurality of polarization configurations; measuring, by the repeater, a power delay profile per symbol of the set of symbols; evaluating, by the repeater, based at least partly on the measuring of the power delay profile, inter-symbol interference caused by self-interference per symbol of the transmitted subset of the set of symbols; and configuring, by the repeater, the beam based at least partly on the evaluated inter-symbol interference.

A two-stage network model generates desired operational indicators of a network's physical layer based on channel estimates. The operational indicators may include Doppler, delay spread, SNR, time offset, frequency offset, power delay profile, and similar indicators. The first stage includes an information processing flow pipeline. The second stage includes multiple output heads. The information processing flow pipeline processes an input to extract and compress the meaningful information contained therein. This information is then processed by the output heads to produce the desired operational indicators.

One or more measurements of a positioning reference signal (PRS) is performed (1010, figure 10) by a first apparatus 202 (operating as a terminal device, UE 110, or a base station, gNB 120). The first apparatus obtains (1020), based on the one or more measurements, at least one of: a set of first estimates 215 of a power delay profile (PDP), or a set of second estimates of a channel impulse response (CIR). The first apparatus performs (1030) differential quantization 220 for at least one of: a subset of first estimates from the set of first estimates, or a subset of second estimates from the set of second estimates. Then, the first apparatus transmits (1040), via a plurality of reference signal received power per path (RSRPP) messages, to a second apparatus 204 (operating as a location server, LMF 130), a measurement report 225 including at least one of: quantized first estimates of the PDP or quantized second estimates of the CIR. The UE may measure received DL PRS signals, or the gNB may measure received UL PRS signals, and estimate PDP or CIR. The container to encapsulate the CIR / PDP is not limited to RSRPP, and may be other reporting messages. The second apparatus 204 may perform 235 differential de-quantization for the at least one of the quantized first estimates or the quantized second estimates, and then construct 240 at least one of the power delay profile or the channel impulse response based on at least the differential dequantization.

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.

A terminal according to one aspect of the present disclosure comprises: a reception unit that receives setting information relating to measurement of at least one of a channel impulse response (CIR), a power delay profile (PDP), and a delay profile (DP), the setting information including at least one parameter from among an additional path for artificial intelligence (AI)-based positioning and a relative time difference; and a control unit that applies model inference of the AI-based positioning and performs measurement on the basis of the setting information. According to one aspect of the present disclosure, it is possible to perform appropriate reporting relating to AI / ML-based positioning.

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.

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

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.

A two-stage network model generates desired operational indicators of a network's physical layer based on channel estimates. The operational indicators may include Doppler, delay spread, SNR, time offset, frequency offset, power delay profile, and similar indicators. The first stage includes an information processing flow pipeline. The second stage includes multiple output heads. The information processing flow pipeline processes an input to extract and compress the meaningful information contained therein. This information is then processed by the output heads to produce the desired operational indicators.

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.

An electronic device in a high speed train-single frequency network (HST-SFN) scenario includes processing circuitry configured to receive a first downlink signal from a serving base station (BS) and a second downlink signal from a neighboring BS, the second downlink signal being the same as the first downlink signal, and the first and second downlink signal being transmitted in an SFN scheme, receive a first synchronization signal (SS) from the serving BS and a second SS from the neighboring BS, the second SS being different from the first SS, and the first SS and the second SS being transmitted in a non-SFN scheme, obtain a first power delay profile (PDP) based on the first SS, obtain a second PDP based on the second SS, calculate an effective PDP based on the first PDP and the second PDP, and generate a weight matrix (WM) based on the effective PDP.

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.

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 system and method are provided for modeling a wireless communication environment between UE and an AP within a test space. The method includes receiving a data transmissions at the UE from the AP; determining that at least a portion of the data transmissions is associated with NR-U data; importing and filtering an NR-U UE log to provide filtered NR-U data; generating a power profile for the wireless communication environment using sampled power level measurements from the filtered NR-U data in the NR-U UE log; creating a digital twin map of the test space based on practical geometric configurations of the test space; generating a Doppler profile for the UE using the digital twin map; generating a power delay profile (PDP) profile for the UE using the digital twin map; and building an emulation model for the UE based on the power profile, the Doppler profile and the PDP profile.

The present invention relates to, for example, power delay profile (PDP) estimation in a 5G system, which is necessary for channel estimation and demodulation. Based on channel statistical knowledge, the power delay profile is estimated directly in the frequency domain using the LMMSE property. The present invention adopts an approximation by estimating the second-order statistics of the channel autocorrelation function in the time domain, which is represented by the variance of the derivative of the original channel estimate in the frequency domain.

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.