WO2017097109A1 - Terminal timing deviation estimating method, apparatus, and device in coordinated multiple points transmission - Google Patents

Abstract

Disclosed are a terminal timing deviation estimating method, apparatus, and device in coordinated multiple points transmission, for improving the accuracy of timing receiving of a UE in CoMP. The method comprises: determining signal power of each tap in a time domain channel estimation result of a CSI-RS pilot sequence, determining first average noise power of the time domain channel estimation result, determining a first threshold value according to a maximum value in the signal power of each tap and the first average noise power, and determining an initially-estimated initial path position according to the first threshold value; and after adjusting a timing deviation of the time domain channel estimation result according to the initially-estimated initial path position, determining second average noise power, determining a second threshold value according to the maximum value in the signal power of each tap and the second average noise power, determining a modified value of the initially-estimated initial path position according to the second threshold value, and modifying the initially-estimated initial path position according to the modified value to obtain a final timing deviation estimation value.

Description

Method, device and device for estimating terminal timing deviation in coordinated multi-point transmission

This application claims the priority of the Chinese patent application filed on December 10, 2015, the Chinese Patent Office, the application number is 201510917135.9, and the application name is "terminal timing deviation estimation method, device and equipment in multi-point coordinated transmission". This is incorporated herein by reference.

Technical field

The present application relates to the field of communications technologies, and in particular, to a method, device, and device for estimating terminal timing offset in coordinated multi-point transmission.

Background technique

LTE (Long Term Evolution) system uses Orthogonal Frequency Division Multiplexing (OFDM) based orthogonal multiple access (OFDM) for OFDM (Long Term Evolution) systems. Therefore, for LTE, inter-cell interference becomes the dominant interference. In addition, CDMA (Code Division Multiple Access) system uses soft capacity to implement the same-frequency networking. LTE cannot directly implement the same-frequency networking. Therefore, how to reduce inter-cell interference and realize the same-frequency networking becomes a major problem of LTE and LTE-A (Advanced LTE).

In the LTE system, inter-cell interference is mainly reduced by ICIC (Inter Cell Interference Coordination). The inter-base station reduces the interference of the cell edge users by cooperatively scheduling the transmission power of different radio resource blocks, thereby implementing the same-frequency networking. In the LTE-A system, in order to further reduce the co-channel interference between cells, a multi-point coordinated transmission method is adopted to reduce inter-cell interference, improve the spectrum efficiency of the system, and particularly improve the performance of the cell edge user.

CoMP (Coordinated Multiple Points Transmission/Reception) refers to multiple transmission points separated by geographical locations, and cooperates to transmit data for one UE (User Equipment, terminal) or jointly receive data sent by one UE. A plurality of transmission points participating in cooperation generally refer to base stations of a plurality of cells. Conventionally, multiple transmission points use different CELLIDs (Cell IDs), but one scenario is as follows:

In a macro cell coverage area, a heterogeneous network using a low-power RRH (Remote Radio Head), where the transmission or reception point is an RRH, has the same cell identifier as the macro cell. Since the RRH and the Macro have the same Cell ID, the downlink signal can be enhanced, and the macro cell is the serving cell.

The CoMP feature is mainly embodied in TM10 (Transmission Mode 10). TM10 has two UE behaviors: Type A (Type A) and Type B (Type B), where Type A considers all reference signals to be co-sited. No signaling is required; Type B considers that not all reference signals are co-sited, only high-level signaling The reference signal is between QCL (Quasi-Co-Location).

The information that the network can notify the UE includes: CRS (Cell-specific Reference Signal) port number, non-zero power (NZP) CSI-RS (Channel State Information Reference Signal) Configuration information, zero-power (ZP) CSI-RS configuration information, and PQI information (ie, contents in Table 1).

If the configuration is CoMP TM10 mode, type B, each transmission point is configured with the same CELLID, and only the CRS pilot is configured in the serving cell. If the terminal receives the downlink data and is not at the transmission point where the serving cell is located, the corresponding CRS pilot cannot It reflects the characteristics of some wireless channel fading of downlink received data, so it needs to measure based on the non-zero power CSI-RS configured by the transmission point where the downlink data is located.

In a CoMP scenario, if the configured transmission mode is TM10 and the QCL is type B, for a given serving cell, the upper layer signaling can configure up to four sets of parameter sets for the PDSCH (Physical Uplink Control) for a UE configured with TM10. Channel, physical uplink shared channel) decoding, as shown in Table 1.

Table 1

The value of the ‘PQI’ field	description
‘00’	High-level configuration parameter set 1
‘01’	High-level configuration parameter set 2
‘10’	High-level configuration parameter set 3
‘11’	High-level configuration parameter set 4

Each set of parameters includes a CRS port number (denoted as CRSport _n ), ZP CSI-RS configuration information (represented as CSIRS _{n, ZP} ), NZP CSI-RS configuration information (represented as CSIRS _{n, NZP} ), and more Information such as the Multimedia Broadcast Single Frequency Network (MBSFN) identifier (denoted as MBSFN _n ), the frequency offset (denoted as Freoff _n ), and the PDSCH resource start position (denoted as PDSCHRB _n ), where 1≤n≤ N, N represents the total number of parameter sets. The UE does not need to know the correspondence between the configuration information and the transmission point, and only needs to know which group of configuration information corresponding to the current receiving information is. The correspondence between the configuration information and the transmission point is controlled by the network.

The PDCCH (Physical Downlink Control Channel)/EPDCCH (Enhanced PDCCH) is enhanced by the UE according to the detected DCI (Downlink Control Information) format 2D for the UE and the given serving cell. The downlink control channel is parsed to obtain PQI (PDSCH RE Mapping and Quasi-Co-Location Indicator) control information, and the PQI control information is an identifier of the parameter set, assuming the nth sub-sub UE detected when frame The PQI is i, and the UE performs subsequent data processing according to the information in the corresponding i-th parameter set. As shown in FIG. 1 , the processing procedure is as follows:

first step:

In the nth subframe, the UE determines whether the current subframe has an NZP CSI-RS according to the configuration information CSIRS _{i, NZP} of the NZP CSI-RS in the i-th parameter set, and the determination formula is specifically as shown in formula (1):

(10n _f +n-Δ _CSI-RS )mod T _CSI-RS =0 Formula (1)

Where n _f denotes a radio frame number, n denotes a subframe number, T _CSI-RS denotes a CSI-RS period (unit is a subframe), Δ _CSI-RS denotes a CSI-RS subframe offset, T _CSI-RS and Δ _{The CSI-RS} is configured by a higher layer, where "mod" is a remainder operation.

The second step:

If the UE calculates the NZP CSI-RS configured by the CSIRS _{i and the NZP} in the nth subframe system according to the formula (1), the channel estimation information of the CSI-RS is calculated according to the configuration information CSIRS _{i, NZP of the NZP} CSI-RS. And measuring the timing advance amount IRT _i,n of the nth subframe according to the channel estimation information of the CSI-RS, that is, the result measured by the nth subframe based on the i-th parameter set, and the result measured based on the other parameter set is 0, expressed as IRT _{j, n} =0, where j ∈ [0, 3], and j ≠ i.

If the UE calculates the NZP CSI-RS of the _NZP configuration in the nth subframe system according to the formula (1), the timing advance amount IRT _{i,n of} the nth subframe is zero, that is, the nth subframe is based on The result of the measurement of the i-th parameter set, where 0 ≤ i ≤ 3.

third step:

Calculating the receiving timing of the terminal, the UE respectively calculates a corresponding receiving timing for each set of parameter sets (where the parameter set refers to the information in Table 1), which is expressed as: assuming that the receiving timing is represented as timepos _i , corresponding to the i-th parameter set The reception timing is expressed by the formula (2) as:

Timepos _i =timepos _i +IRT _i,n formula (2)

Where 0 ≤ i ≤ 3. Further, after the calculated timing advance amount IRT _{i,n is} subjected to multi-frame averaging or smoothing processing, the processed timing advance is used to calculate the corresponding receiving timing, and the timing corresponding to each set of parameter sets during the averaging or smoothing processing is performed. The advance amount is processed separately.

the fourth step:

The UE selects a receiving timing corresponding to the parameter set corresponding to the PQI information according to the PQI information received by the current subframe, As the reception timing of the current subframe UE. Depending on the PQI information, the reception timing of each subframe may vary greatly, but does not affect the signal reception and processing of the terminal.

Since the configuration of the CSI-RS is not continuous, in different PQI configurations, the signal transmission interval of the CSI-RS configuration of the same parameter set is larger, and the UE reception timing cannot be adjusted in time, so the accuracy of the reception timing in this scheme is compared. The CRS is poor, but since the RRH transmission point does not transmit the CRS, the reception timing can only be calculated using the CSI-RS.

Since the macro cell and the RRH belong to different transmission points, when the reception timing difference between the two transmission points is large, if the RRH signal is received according to the timing of the macro cell, the signal reception performance may be poor. Moreover, since the RRH does not transmit the CRS, accurate reception timing cannot be obtained according to the measurement result of the RRH. Based on this, it is necessary to provide a timing adjustment method of the UE in CoMP to improve the accuracy of the reception timing.

Summary of the invention

The embodiments of the present invention provide a method, a device, and a device for estimating a timing offset of a multipoint coordinated transmission, which are used to improve the accuracy of UE receiving timing in CoMP.

The specific technical solutions provided by the embodiments of the present application are as follows:

The embodiment of the present application provides a terminal timing offset estimation method in multi-point coordinated transmission, including:

Determining a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determining a time domain channel estimation result of the CSI-RS pilot sequence;

Determining a signal power of each tap in the time domain channel estimation result, and determining a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and Determining, by the first average noise power, a first threshold value, and determining an initial estimated first path position according to the first threshold value and a signal power of each tap in the time domain channel estimation result;

And adjusting a timing deviation of the time domain channel estimation result according to the initial estimated first path position, and determining a second average noise power of the adjusted time domain channel estimation result, according to each of the adjusted time domain channel estimation results. Determining a maximum value of the tapped signal power and the second average noise power, and determining the second threshold value according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result The initially estimated correction value of the first diameter position is corrected according to the correction value to obtain the final timing deviation estimation value.

In a possible implementation, determining a first threshold according to a maximum value of signal powers of each tap in the time domain channel estimation result and the first average noise power, including:

Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

And determining the first threshold according to the first optional threshold and the second optional threshold.

In a possible implementation, determining the first threshold according to the first optional threshold and the second optional threshold, including:

Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.

In a possible implementation, determining an initial estimated first-path position according to the first threshold value and a signal power of each tap in the time-domain channel estimation result, including:

And selecting, among the signal powers of the taps in the time domain channel estimation result, a first tap position greater than the first threshold value, and determining the selected tap position as the initial estimated first diameter position.

In a possible implementation, the timing deviation of the time domain channel estimation result is adjusted according to the initial estimated first path position, including:

And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.

In a possible implementation, determining a second threshold according to a maximum value of signal power of each tap in the adjusted time domain channel estimation result and the second average noise power, including:

Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

And determining the second threshold according to the third optional threshold and the fourth optional threshold.

In a possible implementation, the second threshold is less than the first threshold.

In a possible implementation, determining, according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result, a correction value of the initial estimated first diameter position, according to the correction value The initial estimated initial path position is corrected to obtain the final timing deviation estimate, including:

Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.

The embodiment of the present application further provides a terminal timing offset estimation apparatus for multi-point coordinated transmission, including:

a first processing module, configured to determine a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determine a time domain channel estimation result of the CSI-RS pilot sequence;

a second processing module, configured to determine signal power of each tap in the time domain channel estimation result, and determine a first average noise power of the time domain channel estimation result, according to each tap in the time domain channel estimation result Determining a first threshold value, a maximum value of the signal power, and the first average noise power, and determining an initial estimated initial path according to the first threshold value and a signal power of each tap in the time domain channel estimation result position;

a third processing module, configured to adjust a timing offset of the time domain channel estimation result according to the initial estimated first path position, and determine a second average noise power of the adjusted time domain channel estimation result, according to the adjusted The maximum value of the signal power of each tap in the time domain channel estimation result and the second average noise power determine a second threshold value according to the second threshold value and each tap in the adjusted time domain channel estimation result The signal power is determined by determining a correction value of the initial estimated first diameter position, and correcting the initial estimated first diameter position according to the correction value to obtain a final timing deviation estimation value.

In a possible implementation manner, the second processing module is specifically configured to:

Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

And determining the first threshold according to the first optional threshold and the second optional threshold.

In a possible implementation manner, the second processing module is specifically configured to:

Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.

In a possible implementation manner, the second processing module is specifically configured to:

And selecting, among the signal powers of the taps in the time domain channel estimation result, a first tap position greater than the first threshold value, and determining the selected tap position as the initial estimated first diameter position.

In a possible implementation manner, the third processing module is specifically configured to:

And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.

In a possible implementation manner, the third processing module is specifically configured to:

Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

And determining the second threshold according to the third optional threshold and the fourth optional threshold.

In a possible implementation, the second threshold is less than the first threshold.

In a possible implementation manner, the third processing module is specifically configured to:

Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.

The embodiment of the present application further provides a device, which mainly includes a processor and a memory, wherein the memory stores a preset program, and the processor is configured to read a program saved in the memory, and execute the following process according to the program:

Determining a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determining a time domain channel estimation result of the CSI-RS pilot sequence;

Determining a signal power of each tap in the time domain channel estimation result, and determining a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and Determining, by the first average noise power, a first threshold value, and determining an initial estimated first path position according to the first threshold value and a signal power of each tap in the time domain channel estimation result;

And adjusting a timing deviation of the time domain channel estimation result according to the initial estimated first path position, and determining a second average noise power of the adjusted time domain channel estimation result, according to each of the adjusted time domain channel estimation results. Determining a maximum value of the tapped signal power and the second average noise power, and determining the second threshold value according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result The initially estimated correction value of the first diameter position is corrected according to the correction value to obtain the final timing deviation estimation value.

In an implementation, the processor calculates a product of the first average noise power and the first coefficient to obtain a first optional threshold; and calculates a maximum value and a second of the signal power of each tap in the time domain channel estimation result. The product of the coefficients obtains a second optional threshold; and the first threshold is determined according to the first selectable threshold and the second selectable threshold.

In an implementation, the processor determines that a minimum of the first optional threshold and the second optional threshold is the first threshold; or

Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.

In an implementation, the processor selects, among the signal powers of the taps in the time domain channel estimation result, a first tap position that is greater than the first threshold value, and determines the selected tap position as the initial estimated first diameter position.

In an implementation, the processor uses, as an initial tap position, a tap corresponding to the initial estimated first-path position in the time domain channel estimation result, and sequentially shifts each tap position in the time domain channel estimation result to obtain a timing offset adjustment. Post-time channel estimation results.

In an implementation, the processor calculates a product of the second average noise power and a third coefficient to obtain a third optional threshold; and calculates a maximum value of the signal power of each tap in the adjusted time domain channel estimation result. And a fourth optional threshold value obtained by multiplying the fourth coefficient; determining the second threshold value according to the third optional threshold value and the fourth optional threshold value.

Optionally, the second threshold is less than the first threshold.

In an implementation, the processor selects, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position that is greater than the second threshold value, and determines the selected tap position as the initial estimate. A correction value of the first-path position; a correction value of the initial-path position of the initial estimate, and a sum of the initial-path position of the initial estimate, and the obtained sum value is determined as the final timing deviation estimation value.

The embodiment of the present application further provides a terminal timing offset estimation apparatus for multi-point coordinated transmission, including: a processor and a memory, wherein the memory stores a preset program, and the processor is configured to read the program saved in the memory, according to The program performs the following process:

Determining a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determining a time domain channel estimation result of the CSI-RS pilot sequence;

Determining a signal power of each tap in the time domain channel estimation result, and determining a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and Determining, by the first average noise power, a first threshold value, and determining an initial estimated first path position according to the first threshold value and a signal power of each tap in the time domain channel estimation result;

Adjusting the timing deviation of the time domain channel estimation result according to the initial estimated first path position, determining the tone a second average noise power of the entire time domain channel estimation result, determining a second threshold value according to a maximum value of the signal power of each tap in the adjusted time domain channel estimation result and the second average noise power, according to Determining, by the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result, a correction value of the initial estimated first diameter position, and determining the initial estimated first diameter position according to the correction value The correction is made to obtain the final timing deviation estimate.

Optionally, the processor is specifically configured to:

Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

And determining the first threshold according to the first optional threshold and the second optional threshold.

Optionally, the processor is specifically configured to:

Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.

Optionally, the processor is specifically configured to:

And selecting, among the signal powers of the taps in the time domain channel estimation result, a first tap position greater than the first threshold value, and determining the selected tap position as the initial estimated first diameter position.

Optionally, the processor is specifically configured to:

And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.

Optionally, the processor is specifically configured to:

Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

And determining the second threshold according to the third optional threshold and the fourth optional threshold.

Optionally, the second threshold is less than the first threshold.

Optionally, the processor is specifically configured to:

Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.

Based on the foregoing technical solution, in the embodiment of the present application, after determining the time domain channel estimation result of the CSI-RS pilot sequence of the received signal, according to the maximum value of the signal power of each tap in the time domain channel estimation result, and the time Determining, by the first average noise power of the domain channel estimation result, a first threshold value, and determining an initial estimated first diameter position according to the first threshold value and channel power of each tap in the time domain channel estimation result, according to the initial After the estimated first-path position performs coarse timing offset adjustment on the time-domain channel estimation result, determining a second average noise power of the adjusted time-domain channel estimation result, according to the adjusted signal of each tap in the adjusted time-domain channel estimation result Determining a second threshold value according to a maximum value in the power and a second average noise power, and determining a first path position of the initial estimate according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result Correction value, according to the correction value, correcting the initial path position of the initial estimation to obtain an accurate timing deviation estimation value, thereby being able to be in the CoMP scene Accurate timing offset estimation is performed, and accurate delay spread and timing information are obtained according to the accurate timing offset estimation, thereby improving the accuracy of the UE receiving timing.

DRAWINGS

FIG. 1 is a schematic diagram of a process of receiving timing of a terminal in a CoMP scenario;

2 is a schematic flowchart of a method for estimating a timing offset of a terminal in a CoMP according to an embodiment of the present application;

3 is a schematic diagram of a channel estimation tap distribution in an ideal timing situation according to an embodiment of the present application;

4a is a schematic diagram of a channel estimation tap distribution of a timing advance in the first embodiment of the present application;

4b is a schematic diagram of a channel estimation tap distribution after calibration in the first embodiment of the present application;

5a is a schematic diagram of channel estimation tap distribution of timing lag in the second embodiment of the present application;

FIG. 5b is a schematic diagram of a channel estimation tap distribution after calibration according to Embodiment 2 of the present application; FIG.

6 is a schematic structural diagram of a device in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a device in an embodiment of the present application.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. Based on the embodiments in the present application, all of those obtained by those of ordinary skill in the art without creative efforts Other embodiments are within the scope of the protection of the present application.

The delay spread is obtained by measuring the effective path of the signal, that is, the trailing diameter of the effective path minus the first diameter of the effective path, that is, the measurement result of the delay spread. If the terminal receiving timing adjustment is inaccurate, the first path of the signal effective path leads or lags too much, which will result in an effective path window, that is, the search space containing the effective path and the effective path in the noise window is inaccurate, directly affecting the effective path threshold. Calculation, which affects the delay spread measurement.

The method for adjusting the timing of the CoMP system proposed in the present application solves the downlink data receiving process in the CoMP scenario, and the main idea is: obtaining the initial estimated effective path by using the time domain channel estimation result of the CSI-RS by limiting the threshold. Position of the first path, and then adjusting the position of the initial estimated effective path first diameter position in the time domain channel estimation result to the zeroth time domain tap position, and comparing the adjusted time domain channel estimation result with the set threshold Determine the first diameter and the trailing diameter of the effective path, and finally obtain the delay extension measurement result.

As shown in FIG. 2, in the embodiment of the present application, the detailed method for estimating the timing offset of the terminal in CoMP is as follows:

Step 201: Determine a CSI-RS pilot sequence carried in the received signal, and determine a time domain channel estimation result of the CSI-RS pilot sequence.

In a specific implementation, after receiving the signal through the antenna port, the terminal converts the received signal into a frequency domain signal by time-frequency conversion, and performs data extraction on the frequency domain signal, that is, extracts the CSI-RS pilot position according to the configuration information of the CSI-RS. Receiving data G _f , obtaining a CSI-RS pilot sequence according to the configuration information of the CSI-RS, denoted as R, and calculating a frequency domain channel estimation result of the CSI-RS, which is expressed by:

Where H _f represents the frequency domain channel estimation result of the CSI-RS.

The frequency domain channel estimation result of the estimated CSI-RS is subjected to IDFT (Inverse Discrete Fourier Transform) to obtain a time domain channel estimation result, which is expressed as: H _t =IDFT(H _f ), where H _t represents the time domain channel estimation result.

Step 202: Determine signal power of each tap in the time domain channel estimation result, and determine a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and the The first average noise power determines a first threshold value, and the initial estimated first-path position is determined according to the first threshold value and the signal power of each tap in the time-domain channel estimation result.

In the implementation, the noise window of the time domain channel estimation result is intercepted, and the first average noise power is calculated, wherein the noise window is determined according to the length of the CP (Cyclic Prefix) of the received signal, that is, the noise window is from the maximum CP length. The position is determined by the range of the trailing position of the time domain channel estimation result.

In the implementation, the specific process of determining the first threshold is as follows:

Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold; calculating a time domain channel estimate The product of the maximum value of the signal power of each tap and the second coefficient in the result, obtaining a second optional threshold; determining the first threshold according to the first optional threshold and the second optional threshold .

The first optional threshold value can be expressed as: Γ ₁ = β ₁ · P _noise , where β ₁ represents the first coefficient, and P _noise represents the first average noise power, and the first coefficient can be determined by simulation, or Determined according to engineering requirements.

The second optional threshold may be expressed as: Γ ₂ = β ₂ · P _max , where β ₂ represents the second coefficient, and P _max represents the maximum value of the signal power of each tap in the time domain channel estimation result, The two coefficients can be determined by simulation or determined according to engineering requirements.

In the implementation, the first threshold is determined according to the first optional threshold and the second optional threshold, including but not limited to the following three implementation manners:

First, determining a minimum of the first selectable threshold and the second selectable threshold as a first threshold, expressed as: Γ=min(Γ ₁ , Γ ₂ ), where Γ denotes the first The threshold value, Γ ₁ represents the first optional threshold, and Γ ₂ represents the second optional threshold.

The first threshold determined by the first implementation is too small, and the searched channel estimates the leading position to lead.

Second, determining a maximum of the first selectable threshold and the second selectable threshold as a first threshold, expressed as: Γ=max(Γ ₁ , Γ ₂ ), where Γ denotes the first The threshold value, Γ ₁ represents the first optional threshold, and Γ ₂ represents the second optional threshold.

The first threshold determined by the second implementation is too large, and the searched channel estimates the first path position to lag.

Third, the first threshold value is determined as Γ=α·Γ ₁ +(1−α)·Γ ₂ , where Γ represents the first threshold value, Γ ₁ represents the first optional threshold value, and Γ ₂ represents The second optional threshold value, α is a preset specific gravity coefficient, and 0 ≤ α ≤ 1.

In practical applications, when the received signal has a low signal-to-noise ratio characteristic, that is, when the signal-to-noise ratio of the received signal is lower than a preset threshold, the measurement of Γ _{1 is} relatively accurate, and Γ _{1 is} selected as the first threshold Γ The channel estimation first-path position can be obtained relatively accurately. In the case that the received signal has a high signal-to-noise ratio characteristic, that is, when the signal-to-noise ratio of the received signal is higher than a preset threshold, the Γ ₂ measurement is relatively accurate, and Γ _{2 is} selected as the first threshold Γ, which can be relatively accurate. Obtain the channel estimate first path position.

In the implementation, among the signal powers of the taps in the time domain channel estimation result, the first tap position greater than the first threshold value is determined, and the selected tap position is determined as the initial estimated first diameter position, which is denoted as τ ₁ .

Step 203: Adjust a timing deviation of the time domain channel estimation result according to the initial estimated first path position, and determine a second average noise power of the adjusted time domain channel estimation result, according to each tap in the adjusted time domain channel estimation result. a maximum value of the signal power and the second average noise power determining a second threshold value according to the second threshold value And adjusting the signal power of each tap in the adjusted time domain channel estimation result, determining a correction value of the initial estimated first diameter position, and correcting the initial estimated first diameter position according to the correction value to obtain a final timing deviation estimation value.

In the implementation, the tap corresponding to the initial path position of the initial estimation in the time domain channel estimation result is used as the initial tap position, and the tap positions in the time domain channel estimation result are sequentially translated to obtain the time domain channel estimation result after the timing offset adjustment. .

Specifically, the channel estimation value of the tap position τ ₁ in the time domain channel estimation result is translated to the position of the tap zero, and the tap positions in the time domain channel estimation result are sequentially translated according to the rule to obtain the timing after the timing offset adjustment. Domain channel estimation result.

Specifically, the noise window of the adjusted time domain channel estimation result is intercepted, and the second average noise power is calculated. The noise window used in the calculation of the second average noise power is the same as the noise window used in the calculation of the first average noise power.

In the implementation, the specific process of determining the second threshold is as follows:

Calculating a product of the second average noise power and the third coefficient to obtain a third optional threshold value; calculating a product of a maximum value of the signal power of each tap in the adjusted time domain channel estimation result and a fourth coefficient, obtaining the first Four optional threshold values; determining a second threshold value according to the third optional threshold value and the fourth optional threshold value.

Optionally, the second threshold is less than the first threshold to ensure that all the valid signal taps in the time domain channel estimation result are performed after the first path position and the trailing position search are subsequently performed according to the second threshold value. Be included in the search as much as possible.

Wherein, the third optional threshold value can be expressed as: Γ′ ₁ = β′ ₁ · P′ _noise , where Γ′ ₁ represents a third coefficient, and P′ _noise represents a second average noise power, and the third coefficient can pass The simulation is determined and can also be determined according to engineering requirements.

The fourth optional threshold value may be expressed as: Γ′ ₂ = β′ ₂ · P _max , where Γ′ ₂ represents the fourth coefficient, and P _max represents the maximum of the signal power of each tap in the time domain channel estimation result. The value, the fourth coefficient can be determined by simulation or can be determined according to engineering requirements.

Specifically, the value of β′ ₁ is smaller than β ₁ , and the value of β′ ₂ is smaller than β ₂ to ensure that the determined second threshold is less than the first threshold.

The second threshold is determined according to the third optional threshold and the fourth optional threshold, including but not limited to the following three implementation manners:

First, determining a minimum of the third selectable threshold and the fourth selectable threshold as a second threshold, expressed as: Γ'=min(Γ' ₁ , Γ' ₂ ), wherein ' represents a second threshold value, Γ' ₁ denotes a third optional threshold value, and Γ' ₂ denotes a fourth selectable threshold value.

The second threshold determined by the first implementation is too small, and the searched channel estimates the leading position to lead.

Second, determining a maximum of the third selectable threshold and the fourth selectable threshold as a second threshold, expressed as: Γ'=max(Γ' ₁ , Γ' ₂ ), where Γ ' represents a second threshold value, Γ' ₁ denotes a third optional threshold value, and Γ' ₂ denotes a fourth selectable threshold value.

The second threshold determined by the second implementation is too large, and the searched channel estimates the first path position to lag.

Third, determining that the second threshold value is Γ'=α·Γ' ₁ +(1-α)·Γ′ ₂ , where Γ′ represents a second threshold value, and Γ′ ₁ represents a first selectable threshold The value Γ′ ₂ represents the second optional threshold value, α is the preset specific gravity coefficient, and 0 ≤ α ≤ 1.

In the case of practical application, in the case where the received signal has a low signal to noise ratio characteristic, i.e., lower than a preset threshold value of the received signal SNR, Γ _'1 measurement more accurate, selection Γ' ₁ as the second threshold The value Γ' can obtain a correction value of the initial estimated initial path position relatively accurately. In the case that the received signal has a high signal-to-noise ratio characteristic, that is, in the case where the signal-to-noise ratio of the received signal is higher than a preset threshold, the measurement of Γ′ _{2 is} relatively accurate, and Γ′ _{2 is} selected as the second threshold Γ′, The correction value of the initial estimated first diameter position can be obtained relatively accurately.

Specifically, the process of determining the final timing offset estimate is:

Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, the first tap position greater than the second threshold value, determining the selected tap position as the correction value of the initial estimated first path position; calculating the initial estimate The sum of the corrected value of the first-path position and the initial estimated first-diameter position determines the obtained sum value as the final timing deviation estimate.

In the implementation, searching for the adjusted first time channel estimation result in the time domain channel estimation result that the tap power is greater than the second threshold value (expressed as τ _start ) and the last tap position (represented as τ _end ), and the delay spread value indicates It is: τ'=τ _end -τ _start , the first tap position τ _start is the correction value of the initial estimated first diameter position, and the initial value of the initial estimated position is corrected by using the correction value to obtain the final timing deviation estimation value. Is expressed as: τ' ₁ = τ ₁ + τ _start , where τ' ₁ represents the final timing deviation estimate and τ ₁ represents the initial estimated first path position.

Further, the timing offset adjustment of the received signal is performed according to the final timing deviation estimation value, and the performance of the receiver is improved by improving the accuracy of the timing offset adjustment and the accurate measurement of the delay spread.

There are at least two specific implementations in the application:

In the first scheme, based on the received signals of each receiving port of each receiving antenna, the final timing offset estimates are calculated according to the procedures described in steps 201 to 203, and the final corresponding to each port of each receiving antenna is calculated. The average of the timing offset estimates is used as the final timing offset estimate for the terminal.

In the second solution, the first threshold and the second threshold corresponding to each port of each receiving antenna are respectively determined. The average value of each first threshold value is calculated as the first threshold value for final timing deviation estimation, and the average value of each second threshold value is calculated to finally determine the second threshold value of the timing deviation estimation. The average value of the power of the time domain channel estimation result of the received signal of each port of each receiving antenna is calculated. An average of the first average noise power of the received signal of each port of each receiving antenna and an average of the second average noise power are calculated. In the process described in steps 201 to 203, the average value of the first threshold value is used instead of the first threshold value, and the average value of the second threshold value is used instead of the second threshold value, and the first average noise power is used. The average value of the first average noise power is replaced by the average value of the second average noise power, and the signal power of each tap in the average value of the power of the time domain channel estimation result is used to replace the time domain channel estimation result. The signal power of each tap determines the final timing offset estimate of the terminal according to the procedure described in steps 201 through 203.

The timing deviation estimation process provided by the embodiment of the present application is exemplified by two specific embodiments.

Suppose IDFT length denoted as N _FFT, taking into account the use IDFT transform the frequency domain to the time domain may be the signal power leak, will retain article N _leak path N _FFT, the time domain channel estimate taps ranging from [-N _leak: N _FFT -N _leak ], the noise window is [N _τ :N _FFT -N _leak ], and N _τ is the tap position corresponding to the CP length. Ideally, the maximum tap position is at the position of tap 0, and the useful signal power is distributed outside the noise window, as shown in Figure 3, which is a schematic diagram of the channel estimation tap distribution for ideal timing.

Embodiment 1

Assuming N _FFT =128, N _leak =20, N _τ =80, the noise window is [80,108], the useful signal tap range is [-20:79], and the timing advance is 30, as shown in Figure 4a. The schematic diagram of the channel estimation tap distribution. In the case of timing advance, some useful signals are included in the range of the noise window, and the threshold is obtained according to the noise power of the mixed useful signal to obtain the delay extension and the timing deviation information, and the error is relatively large, so the error is relatively large. The channel estimation needs to be calibrated according to the roughly estimated timing deviation. Assuming that the roughly estimated first-path position τ ₁ is 20, the calibrated channel estimation tap distribution is as shown in FIG. 4b, and the noise window does not contain the useful signal tap. Based on the noise power and signal power, the delay spread and the timing deviation can be estimated to improve the accuracy.

Specific embodiment 2:

Assuming N _FFT =128, N _leak =20, N _τ =80, the noise window is [80,108], the useful signal tap range is [-20:79], and the timing lag is 30, as shown in Figure 5a. The schematic diagram of the channel estimation tap distribution. In the case of timing lag, some useful signals are included in the noise window at the end of the noise window, and the threshold is obtained according to the noise power of the mixed useful signal to obtain the delay extension and timing deviation information. It is relatively large, so the channel estimation is first calibrated according to the roughly estimated timing deviation. If the estimated first-path position τ ₁ is -20, the calibrated channel estimation tap distribution is shown in Figure 5b, and the noise window does not contain valid. The signal taps, on the basis of which the delay spread and timing deviation are re-estimated based on the noise power and signal power, the accuracy can be improved.

Based on the same inventive concept, a device for estimating the timing of the terminal in the CoMP is provided in the embodiment of the present application. For the specific implementation of the device, refer to the description of the foregoing method embodiment, and the repeated description is not repeated, as shown in FIG. The device mainly includes:

The first processing module 601 is configured to determine a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determine a time domain channel estimation result of the CSI-RS pilot sequence;

a second processing module 602, configured to determine signal power of each tap in the time domain channel estimation result, and determine a first average noise power of the time domain channel estimation result, according to each tap in the time domain channel estimation result a maximum value of the signal power and the first average noise power determining a first threshold value, and determining an initial estimate based on the first threshold value and a signal power of each tap in the time domain channel estimation result Diameter position

The third processing module 603 is configured to adjust a timing offset of the time domain channel estimation result according to the initial estimated first path position, and determine a second average noise power of the adjusted time domain channel estimation result, according to the adjusted The maximum value of the signal power of each tap and the second average noise power in the time domain channel estimation result determine a second threshold value, according to the second threshold value and each of the adjusted time domain channel estimation results The signal power of the tap determines a correction value of the initial estimated first diameter position, and corrects the initial estimated first diameter position according to the correction value to obtain a final timing deviation estimation value.

In an implementation, the second processing module is specifically configured to:

Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

And determining the first threshold according to the first optional threshold and the second optional threshold.

In an implementation, the second processing module is specifically configured to:

Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.

In an implementation, the second processing module is specifically configured to:

And selecting, among the signal powers of the taps in the time domain channel estimation result, a first tap position greater than the first threshold value, and determining the selected tap position as the initial estimated first diameter position.

In an implementation, the third processing module is specifically configured to:

And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.

In an implementation, the third processing module is specifically configured to:

Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

And determining the second threshold according to the third optional threshold and the fourth optional threshold.

Optionally, the second threshold is less than the first threshold.

In an implementation, the third processing module is specifically configured to:

Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.

Based on the same inventive concept, the embodiment of the present application further provides a device. For the specific implementation of the device, reference may be made to the description of the foregoing method embodiment, and the repeated description is not repeated. As shown in FIG. 7, the device mainly includes a processor 701. And a memory 702, wherein the memory 702 stores a preset program, and the processor 701 is configured to read a program saved in the memory 702, and execute the following process according to the program:

Determining a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determining a time domain channel estimation result of the CSI-RS pilot sequence;

Determining a signal power of each tap in the time domain channel estimation result, and determining a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and Determining, by the first average noise power, a first threshold value, and determining an initial estimated first path position according to the first threshold value and a signal power of each tap in the time domain channel estimation result;

And adjusting a timing deviation of the time domain channel estimation result according to the initial estimated first path position, and determining a second average noise power of the adjusted time domain channel estimation result, according to each of the adjusted time domain channel estimation results. Determining a maximum value of the tapped signal power and the second average noise power, and determining the second threshold value according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result Initial estimate of the initial path position A positive value is obtained by correcting the initial estimated first diameter position according to the correction value to obtain a final timing deviation estimation value.

In an implementation, the processor calculates a product of the first average noise power and the first coefficient to obtain a first optional threshold; and calculates a maximum value and a second of the signal power of each tap in the time domain channel estimation result. The product of the coefficients obtains a second optional threshold; and the first threshold is determined according to the first selectable threshold and the second selectable threshold.

In an implementation, the processor determines that a minimum of the first optional threshold and the second optional threshold is the first threshold; or

Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.

In an implementation, the processor selects, among the signal powers of the taps in the time domain channel estimation result, a first tap position that is greater than the first threshold value, and determines the selected tap position as the initial estimated first diameter position.

In an implementation, the processor uses, as an initial tap position, a tap corresponding to the initial estimated first-path position in the time domain channel estimation result, and sequentially shifts each tap position in the time domain channel estimation result to obtain a timing offset adjustment. Post-time channel estimation results.

In an implementation, the processor calculates a product of the second average noise power and a third coefficient to obtain a third optional threshold; and calculates a maximum value of the signal power of each tap in the adjusted time domain channel estimation result. And a fourth optional threshold value obtained by multiplying the fourth coefficient; determining the second threshold value according to the third optional threshold value and the fourth optional threshold value.

Optionally, the second threshold is less than the first threshold.

In an implementation, the processor selects, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position that is greater than the second threshold value, and determines the selected tap position as the initial estimate. A correction value of the first-path position; a correction value of the initial-path position of the initial estimate, and a sum of the initial-path position of the initial estimate, and the obtained sum value is determined as the final timing deviation estimation value.

Wherein the processor and the memory are connected by a bus, and the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by the processor and various circuits of the memory represented by the memory. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.

The device can be a terminal in combination with a specific application scenario.

Based on the foregoing technical solution, in the embodiment of the present application, after determining the time domain channel estimation result of the CSI-RS pilot sequence of the received signal, according to the maximum value of the signal power of each tap in the time domain channel estimation result, and the time Determining, by the first average noise power of the domain channel estimation result, a first threshold value, and determining an initial estimated first diameter position according to the first threshold value and channel power of each tap in the time domain channel estimation result, according to the initial After the estimated first-path position performs coarse timing offset adjustment on the time-domain channel estimation result, determining a second average noise power of the adjusted time-domain channel estimation result, according to the adjusted signal of each tap in the adjusted time-domain channel estimation result Determining a second threshold value according to a maximum value in the power and a second average noise power, and determining a first path position of the initial estimate according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result Correction value, according to the correction value, correcting the initial path position of the initial estimation to obtain an accurate timing deviation estimation value, thereby being able to be in the CoMP scene Accurate timing offset estimation is performed, and accurate delay spread and timing information are obtained according to the accurate timing offset estimation, thereby improving the accuracy of the UE receiving timing.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions are provided for implementing one or more processes and/or block diagrams in the flowchart The steps of the function specified in the box or in multiple boxes.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims (24)

1. A method for estimating terminal timing deviation in multi-point coordinated transmission, characterized in that:

   Determining a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determining a time domain channel estimation result of the CSI-RS pilot sequence;

   Determining a signal power of each tap in the time domain channel estimation result, and determining a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and Determining, by the first average noise power, a first threshold value, and determining an initial estimated first path position according to the first threshold value and a signal power of each tap in the time domain channel estimation result;

   And adjusting a timing deviation of the time domain channel estimation result according to the initial estimated first path position, and determining a second average noise power of the adjusted time domain channel estimation result, according to each of the adjusted time domain channel estimation results. Determining a maximum value of the tapped signal power and the second average noise power, and determining the second threshold value according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result The initially estimated correction value of the first diameter position is corrected according to the correction value to obtain the final timing deviation estimation value.
2. The method according to claim 1, wherein the determining the first threshold value according to the maximum value of the signal power of each tap in the time domain channel estimation result and the first average noise power comprises:

   Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

   Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

   And determining the first threshold according to the first optional threshold and the second optional threshold.
3. The method of claim 2, wherein determining the first threshold value according to the first selectable threshold value and the second selectable threshold value comprises:

   Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

   Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

   Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.
4. The method according to claim 2, wherein determining the initial estimated first-path position according to the first threshold value and the signal power of each tap in the time-domain channel estimation result comprises:

   Selecting, among the signal powers of the taps in the time domain channel estimation result, the first one is greater than the first threshold value The head position determines the selected tap position as the initial estimated head position.
5. The method according to any one of claims 1 to 4, wherein adjusting the timing deviation of the time domain channel estimation result according to the initial estimated first path position comprises:

   And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.
6. The method according to claim 5, wherein determining the second threshold value according to the maximum value of the signal power of each tap in the adjusted time domain channel estimation result and the second average noise power comprises:

   Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

   Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

   And determining the second threshold according to the third optional threshold and the fourth optional threshold.
7. The method of claim 6 wherein said second threshold value is less than said first threshold value.
8. The method according to claim 6 or 7, wherein the correction of the initial estimated first-path position is determined according to the second threshold value and the signal power of each tap in the adjusted time-domain channel estimation result. And correcting the initial path position of the initial estimate according to the correction value to obtain a final timing deviation estimation value, including:

   Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

   A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.
9. A device for timing offset estimation in a multi-point coordinated transmission, comprising:

   a first processing module, configured to determine a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determine a time domain channel estimation result of the CSI-RS pilot sequence;

   a second processing module, configured to determine signal power of each tap in the time domain channel estimation result, and determine a first average noise power of the time domain channel estimation result, according to each tap in the time domain channel estimation result Determining a first threshold value, a maximum value of the signal power, and the first average noise power, and determining an initial estimated initial path according to the first threshold value and a signal power of each tap in the time domain channel estimation result position;

   a third processing module, configured to adjust a timing offset of the time domain channel estimation result according to the initial estimated first path position, and determine a second average noise power of the adjusted time domain channel estimation result, according to the adjusted The maximum value of the signal power of each tap in the time domain channel estimation result and the second average noise power determine a second threshold value according to the second threshold value and each tap in the adjusted time domain channel estimation result Signal power to determine the initial The estimated correction value of the first diameter position is corrected according to the correction value to obtain the final timing deviation estimation value.
10. The device according to claim 9, wherein the second processing module is specifically configured to:

    Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

    Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

    And determining the first threshold according to the first optional threshold and the second optional threshold.
11. The device of claim 10, wherein the second processing module is specifically configured to:

    Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

    Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

    Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.
12. The device of claim 10, wherein the second processing module is specifically configured to:

    And selecting, among the signal powers of the taps in the time domain channel estimation result, a first tap position greater than the first threshold value, and determining the selected tap position as the initial estimated first diameter position.
13. The device according to any one of claims 9 to 12, wherein the third processing module is specifically configured to:

    And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.
14. The device according to claim 13, wherein the third processing module is specifically configured to:

    Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

    Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

    And determining the second threshold according to the third optional threshold and the fourth optional threshold.
15. The apparatus of claim 14 wherein said second threshold value is less than said first threshold value.
16. The device according to claim 14 or 15, wherein the third processing module is specifically configured to:

    Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

    A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.
17. A device for estimating timing offset in a multi-point coordinated transmission, comprising: a processor and a memory, wherein the memory stores a preset program, and the processor is configured to read a program stored in the memory, and execute the following according to the program; process:

    Determining a channel state information reference signal CSI-RS pilot sequence carried in the received signal, and determining a time domain channel estimation result of the CSI-RS pilot sequence;

    Determining a signal power of each tap in the time domain channel estimation result, and determining a first average noise power of the time domain channel estimation result, according to a maximum value of signal power of each tap in the time domain channel estimation result, and Determining, by the first average noise power, a first threshold value, and determining an initial estimated first path position according to the first threshold value and a signal power of each tap in the time domain channel estimation result;

    And adjusting a timing deviation of the time domain channel estimation result according to the initial estimated first path position, and determining a second average noise power of the adjusted time domain channel estimation result, according to each of the adjusted time domain channel estimation results. Determining a maximum value of the tapped signal power and the second average noise power, and determining the second threshold value according to the second threshold value and the signal power of each tap in the adjusted time domain channel estimation result The initially estimated correction value of the first diameter position is corrected according to the correction value to obtain the final timing deviation estimation value.
18. The device according to claim 17, wherein the processor is specifically configured to:

    Calculating a product of the first average noise power and the first coefficient to obtain a first selectable threshold;

    Calculating a product of a maximum value of the signal power of each tap in the time domain channel estimation result and a second coefficient, to obtain a second selectable threshold value;

    And determining the first threshold according to the first optional threshold and the second optional threshold.
19. The device of claim 18, wherein the processor is specifically configured to:

    Determining a minimum value of the first optional threshold value and the second optional threshold value as the first threshold value; or

    Determining, as the first threshold value, a maximum value of the first optional threshold value and the second optional threshold value; or

    Determining that the first threshold value is Γ=α·Γ ₁ +(1-α)·Γ ₂ , where Γ represents the first threshold value, and Γ ₁ represents the first selectable threshold value, Γ ₂ represents the second optional threshold, α is the preset specific gravity coefficient, 0 ≤ α ≤ 1.
20. The device of claim 18, wherein the processor is specifically configured to:

    Selecting, among the signal powers of the taps in the time domain channel estimation result, the first one is greater than the first threshold value The head position determines the selected tap position as the initial estimated head position.
21. The device according to any one of claims 17 to 20, wherein the processor is specifically configured to:

    And using, as the initial tap position, a tap corresponding to the initial path position of the initial estimated time in the time domain channel estimation result, sequentially shifting each tap position in the time domain channel estimation result to obtain a time domain channel adjusted by the timing offset Estimated results.
22. The device of claim 21, wherein the processor is specifically configured to:

    Calculating a product of the second average noise power and a third coefficient to obtain a third optional threshold;

    Calculating a product of a maximum value of the signal powers of the taps in the adjusted time domain channel estimation result and a fourth coefficient, to obtain a fourth optional threshold value;

    And determining the second threshold according to the third optional threshold and the fourth optional threshold.
23. The apparatus of claim 22 wherein said second threshold value is less than said first threshold value.
24. The device according to claim 22 or 23, wherein the processor is specifically configured to:

    Selecting, among the signal powers of the taps in the adjusted time domain channel estimation result, a first tap position greater than the second threshold value, and determining the selected tap position as the initial estimated first diameter position Correction value;

    A correction value of the initial estimated position of the initial path is calculated, and a sum of the initial estimated first path positions is determined, and the obtained sum value is determined as a final timing deviation estimated value.

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