Cell measurement method and device, communication equipment and readable storage medium

Abstract

The invention relates to a cell measurement method and device, communication equipment and a computer readable storage medium. The method comprises the following steps: converting a received measurement signal into a baseband time domain signal; according to at least one of a first frequency offset estimation value and a second frequency offset estimation value, performing frequency offset compensation processing on the baseband time domain signal to obtain a baseband time domain signal after frequency offset compensation; the first frequency offset estimation value is obtained based on a cyclic prefix of the baseband time domain signal, the second frequency offset estimation value is obtained based on a reference signal of a frequency domain signal, and the frequency domain signal corresponds to a baseband time domain signal at a previous moment; and determining a measurement result of cell measurement according to the baseband time domain signal after frequency offset compensation. By adopting the method, the problems of limited anti-frequency-offset scene and limited anti-frequency-offset performance in the traditional cell measurement can be solved, and the robustness of the cell measurement is improved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a cell measurement method, apparatus, communication device, and computer-readable storage medium. Background Technology

[0002] Cell measurement is a crucial process for determining terminal mobility management. To avoid frequency offset errors that reduce cell measurement accuracy and cause measurement deviations, channel estimates of reference signals at the same location using different Orthogonal Frequency Division Multiplexing (OFDM) symbols can be used to achieve frequency offset estimation based on the phase difference of the reference signals.

[0003] However, since the Channel Status Information-Reference Signal (CSI-RS) measurement signal has only one symbol, frequency offset estimation based on the phase difference of the reference signal is only applicable to Synchronization Signal Block (SSB) measurement scenarios. Furthermore, its frequency offset estimation accuracy is low, and it is prone to causing cell measurement errors when the frequency offset is large. Therefore, current cell measurement technologies suffer from limitations in frequency offset resistance scenarios and performance, resulting in low robustness. Summary of the Invention

[0004] Therefore, it is necessary to provide a robust cell measurement method, apparatus, communication equipment, computer-readable storage medium, and computer program product to address the aforementioned technical problems.

[0005] Firstly, this application provides a cell measurement method, including:

[0006] The received measurement signal is converted into a baseband time domain signal;

[0007] The baseband time-domain signal is subjected to frequency offset compensation processing based on at least one of the first frequency offset estimate and the second frequency offset estimate to obtain the frequency offset compensated baseband time-domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time-domain signal at the previous moment.

[0008] The measurement results of the cell measurement are determined based on the baseband time-domain signal after frequency offset compensation.

[0009] In one embodiment, before converting the received measurement signal into a baseband time-domain signal, the method further includes:

[0010] The baseband time-domain signal after frequency offset compensation at the previous time step is subjected to time-frequency conversion processing to obtain the frequency domain signal;

[0011] Based on the synchronization signal block measurement signal, the frequency domain channel response corresponding to the reference signal of the frequency domain signal is determined according to the channel estimation result of the frequency domain signal. Frequency offset estimation is performed based on the frequency domain channel response to obtain the second frequency offset estimate value.

[0012] In one embodiment, before performing frequency offset compensation processing on the baseband time-domain signal based on at least one of a first frequency offset estimate and a second frequency offset estimate to obtain a frequency offset-compensated baseband time-domain signal, the method further includes:

[0013] Obtain the broadband signal-to-noise ratio of the baseband time-domain signal;

[0014] In response to the broadband signal-to-noise ratio being greater than a preset signal-to-noise ratio threshold, frequency offset estimation is performed based on the cyclic prefix of the baseband time-domain signal to obtain the first frequency offset estimate.

[0015] In one embodiment, obtaining the broadband signal-to-noise ratio of the baseband time-domain signal includes:

[0016] Based on the channel estimation results of the frequency domain signal, determine the broadband signal-to-noise ratio at the previous moment;

[0017] The broadband signal-to-noise ratio at the previous moment is determined as the broadband signal-to-noise ratio of the baseband time-domain signal.

[0018] In one embodiment, the method further includes:

[0019] The signal is measured based on the channel state information reference signal, and the signal-to-noise ratio threshold is reduced.

[0020] In one embodiment, the step of estimating the frequency offset based on the cyclic prefix of the baseband time-domain signal to obtain the first frequency offset estimate includes:

[0021] The sampling points of the cyclic prefix are delayed to obtain the delayed cyclic prefix;

[0022] The first frequency offset estimate is obtained by performing time-domain correlation processing based on the delayed cyclic prefix.

[0023] In one embodiment, determining the cell measurement result based on the frequency offset compensated baseband time-domain signal includes:

[0024] The baseband time-domain signal after frequency offset compensation is subjected to time-frequency conversion processing to obtain the frequency-domain signal at the current moment;

[0025] Channel estimation and noise estimation are performed on the frequency domain signal at the current moment to obtain the measurement results of the cell measurement; the measurement results include at least one of received signal strength indication, reference signal received power, reference signal received quality, and signal-to-interference-plus-noise ratio.

[0026] Secondly, this application also provides a cell measurement device, comprising:

[0027] The signal receiving module is used to convert the received measurement signal into a baseband time domain signal;

[0028] The frequency offset compensation module is used to perform frequency offset compensation processing on the baseband time domain signal according to at least one of a first frequency offset estimate and a second frequency offset estimate, to obtain a frequency offset compensated baseband time domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time domain signal at the previous moment;

[0029] The cell measurement module is used to determine the measurement results of the cell measurement based on the baseband time-domain signal after frequency offset compensation.

[0030] Thirdly, this application also provides a communication device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0031] The received measurement signal is converted into a baseband time domain signal;

[0032] The baseband time-domain signal is subjected to frequency offset compensation processing based on at least one of the first frequency offset estimate and the second frequency offset estimate to obtain the frequency offset compensated baseband time-domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time-domain signal at the previous moment.

[0033] The measurement results of the cell measurement are determined based on the baseband time-domain signal after frequency offset compensation.

[0034] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, performs the following steps:

[0035] The received measurement signal is converted into a baseband time domain signal;

[0036] The baseband time-domain signal is subjected to frequency offset compensation processing based on at least one of the first frequency offset estimate and the second frequency offset estimate to obtain the frequency offset compensated baseband time-domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time-domain signal at the previous moment.

[0037] The measurement results of the cell measurement are determined based on the baseband time-domain signal after frequency offset compensation.

[0038] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, performs the following steps:

[0039] The received measurement signal is converted into a baseband time domain signal;

[0040] The baseband time-domain signal is subjected to frequency offset compensation processing based on at least one of the first frequency offset estimate and the second frequency offset estimate to obtain the frequency offset compensated baseband time-domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time-domain signal at the previous moment.

[0041] The measurement results of the cell measurement are determined based on the baseband time-domain signal after frequency offset compensation.

[0042] The aforementioned cell measurement method, apparatus, communication equipment, computer-readable storage medium, and computer program product convert the received measurement signal into a baseband time-domain signal. Based on at least one of a first frequency offset estimate and a second frequency offset estimate, they perform frequency offset compensation processing on the baseband time-domain signal to obtain a frequency offset-compensated baseband time-domain signal. The first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on a reference signal of the frequency-domain signal. The frequency-domain signal corresponds to the baseband time-domain signal at the previous moment. The measurement result of the cell measurement is determined based on the frequency offset-compensated baseband time-domain signal. Frequency offset estimation based on the cyclic prefix (CP-FOE) can be performed using the baseband time-domain signal at the current moment, and frequency offset estimation based on the reference signal (Reference Signal-Frequency Offset) can be performed using the frequency-domain signal at the previous moment. Frequency offset estimation (RS-FOE), which combines the frequency offset estimates of CP-FOE and RS-FOE, is applicable not only to SSB measurement scenarios but also to CSI measurement scenarios. Furthermore, it has high frequency offset estimation accuracy, overcoming the limitations of traditional cell measurement in terms of anti-frequency offset scenarios and performance, and improving the robustness of cell measurement. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the SSB measurement signal in one embodiment;

[0045] Figure 2 This is a schematic diagram of a CSI-RS measurement signal in one embodiment;

[0046] Figure 3 This is a schematic diagram of the structure of a cell measurement device in one embodiment;

[0047] Figure 4 This is a flowchart illustrating a cell measurement method in one embodiment;

[0048] Figure 5 This is a flowchart illustrating the cell measurement method in another embodiment;

[0049] Figure 6 This is an internal structural diagram of a communication device in one embodiment. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0051] It should be noted that the terms "first," "second," etc., used in this application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "comprising" and "having," and any variations thereof, used in this application, are intended to cover non-exclusive inclusion. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the schemes, or any combination of multiple schemes. The term "current time" used in this application refers to the time of this cell measurement, and "previous time" refers to the time of the last cell measurement. Cell measurements can be performed according to a pre-configured measurement cycle, and the measurement cycle can be dynamically adjusted, without limitation herein.

[0052] Before introducing the specific embodiments of this application, the technical terms involved in this application will be explained:

[0053] NR: New Radio;

[0054] RE: Resource Element;

[0055] RB: Resource Block;

[0056] RSSI: Received Signal Strength Indicator;

[0057] RSRP: Reference Signal Receiving Power;

[0058] RSRQ: Reference Signal Receiving Quality;

[0059] SINR: Signal-to-Interference-plus-Noise Ratio;

[0060] SNR: Signal-to-Noise Ratio;

[0061] PSS: Primary Synchronization Signal;

[0062] SSS: Secondary Synchronization Signal;

[0063] PBCH: Physical Broadcast Channel;

[0064] DMRS: Demodulation Reference Signal;

[0065] MMSE: Minimum Mean Square Error;

[0066] DFT: Discrete Fourier Transform;

[0067] FFT: Fast Fourier Transform;

[0068] LS: Least Square;

[0069] RF: Radio Frequency;

[0070] ADC: Analog-to-Digital Converter;

[0071] DFE: Digital Front-End;

[0072] AGC: Automatic Gain Control;

[0073] CE: Channel Estimation;

[0074] NE: Noise Estimation;

[0075] TOE: Timing Offset Estimation;

[0076] FOE: Frequency Offset Estimation;

[0077] NCO: Numerically Controlled Oscillator;

[0078] RawCE: Raw Channel Estimation;

[0079] ParaEst: Parameter Estimation;

[0080] PDP: Power Delay Profile;

[0081] wbSNR: wideband signal-to-noise ratio;

[0082] L1 / L3: Layer 1 / Layer 3;

[0083] DC: Direct Current;

[0084] IQ: In-phase and Quadrature-phase;

[0085] ACI: Adjacent Channel Interference;

[0086] CCI: Co-Channel Interference;

[0087] ICI: Inter-Channel Interference;

[0088] ISI: Inter-Symbol Interference;

[0089] CP: Cyclic Prefix;

[0090] RS: Reference Signal.

[0091] Cell measurement is a crucial process for determining terminal mobility management. NR communication systems define two measurement signals for cell measurement: SSB and CSI-RS. In idle and inactive states, SSB (the third symbol in SSB) can be used as the terminal's cell measurement signal, while PBCH DMRS (the second, third, and fourth symbols in SSB) can also be used as auxiliary signals. In connected states, both SSB and CSI-RS are defined simultaneously.

[0092] Figure 1 A schematic diagram of an SSB measurement signal is provided. For example, the SSB measurement signal may include three parts: PSS, SSS and PBCH. It occupies 4 symbols in the time domain, with PSS and SSS each occupying 1 symbol and PBCH occupying 2 symbols. In the frequency domain, it occupies 20 RB (240 RE), with PSS and SSS occupying 127 RE and the frequency domain duty cycle of PBCH DMRS being 3 RE / 1 RB.

[0093] Figure 2 A schematic diagram of a CSI-RS measurement signal is provided. Exemplarily, the CSI-RS measurement signal can be configured with 48 RBs (D1) and 96 RBs (D3), where D1 represents a CSI-RS density of 1 and D3 represents a CSI-RS density of 3. The CSI-RS measurement bandwidth can support 24, 48, 96, 192, and 264 RBs, and supports both D1 and D3 density configurations.

[0094] Cell measurement results are numerical values ​​obtained by the terminal based on network configuration, using sampled signals within a specified period and bandwidth, and processed according to specified calculation rules. These values ​​are used to quantify the quality of the serving cell and neighboring cells. For NR communication systems, commonly used measurement metrics include RSSI, RSRP, RSRQ, and SINR.

[0095] Frequency offset errors can lead to a decrease in cell measurement accuracy and cause measurement deviations. Traditional techniques perform channel estimation on the reference signal within the frequency domain to obtain the channel estimate value of the frequency domain reference signal subcarrier point. The frequency offset estimate value is then obtained by using the channel estimate value of the reference signal subcarrier point at the same position in different OFDM symbols. However, on the one hand, this method is suitable for SSB measurement scenarios but not for CSI measurement scenarios, and its resistance to frequency offset is limited. This is because SSB measurement signals have a maximum of 4 symbols available, and the phase difference of the last 3 symbols can be used to estimate the frequency offset, while CSI-RS measurement signals only have 1 symbol, making it impossible to calculate the phase difference. On the other hand, this method has a small time interval and a low signal-to-noise ratio, resulting in low frequency offset estimation accuracy. Especially under large frequency offset conditions (e.g., when the frequency offset exceeds 1 / 4 of the subcarrier spacing), the system performance degrades significantly, and the resistance to frequency offset is limited.

[0096] To address the aforementioned issues, this application proposes a cell measurement method. This method converts the received measurement signal into a baseband time-domain signal. Based on at least one of a first frequency offset estimate and a second frequency offset estimate, frequency offset compensation is performed on the baseband time-domain signal to obtain a frequency offset-compensated baseband time-domain signal. The measurement result of the cell measurement is then determined based on the frequency offset-compensated baseband time-domain signal. The first frequency offset estimate is obtained based on CP-FOE, and the second frequency offset estimate is obtained based on RS-FOE. Combining the frequency offset estimates from CP-FOE and RS-FOE for frequency offset compensation overcomes the limitations of traditional cell measurement methods in terms of frequency offset scenarios and performance, thereby improving the robustness of cell measurement.

[0097] In one exemplary embodiment, such as Figure 3 As shown, a cell measurement device is provided, including an RF module, an ADC module, a DFE module, an AGC module, a CP-FOE module, an NCO module, an FFT module, a RawCE module, a ParaEst module, an RS-FOE module, a CE module, an NE module, and a TOE module.

[0098] refer to Figure 3After the antenna receives the measurement signal, the RF module and ADC module convert the measurement signal into a digital intermediate frequency (IF) signal, which is then converted into a baseband time-domain signal by the DFE module. The AGC module can dynamically adjust the signal gain to ensure the stability of the baseband time-domain signal amplitude. Before the baseband time-domain signal is processed into a frequency-domain signal by the FFT module, it undergoes frequency offset compensation by the NCO. The frequency offset estimation comes from the pre-amplified CP-FOE module and the post-amplified RS-FOE module. The CP-FOE module is enabled by wbSNR; it is enabled when wbSNR exceeds a preset threshold. The RS-FOE module is enabled by the measurement signal type; it is enabled when the measurement signal is an SSB signal. The frequency domain signal obtained by the FFT module is input into the RawCE module to obtain a coarse channel estimate. The ParaEst module processes the coarse channel estimate to obtain channel parameter information such as time delay offset and Doppler frequency shift, as well as wbSNR. Then, it is further processed by the FOE module (including the CP-FOE module and RS-FOE module), CE module, NE module and TOE module to complete frequency offset estimation, fine channel estimation, fine noise estimation and timing estimation. Finally, based on the frequency domain RSSI statistics output by the FFT module and the output results of the CE module and NE module, cell measurement results such as RSSI, RSRP, RSRQ and SINR are obtained.

[0099] Combination Figure 3 The cell measurement device shown, in one exemplary embodiment, is as follows: Figure 4 As shown, a cell measurement method is provided. Taking the application of this method to a terminal as an example, it includes the following steps:

[0100] Step S102: Convert the received measurement signal into a baseband time domain signal.

[0101] The measurement signal can be a signal used for cell measurement, including but not limited to SSB signals or CSI-RS signals. The baseband time-domain signal can be a time-domain signal shifted to baseband.

[0102] Optionally, after receiving the measurement signal, the terminal antenna can convert the measurement signal into an intermediate frequency signal through the RF module, convert the intermediate frequency signal into a digital intermediate frequency signal through the ADC module, and convert the digital intermediate frequency signal into a baseband time domain signal through the DFE module.

[0103] Step S104: Based on at least one of the first frequency offset estimate and the second frequency offset estimate, perform frequency offset compensation processing on the baseband time domain signal to obtain the frequency offset compensated baseband time domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, the frequency domain signal corresponding to the baseband time domain signal of the previous moment.

[0104] The first frequency offset estimate can be the frequency offset estimate obtained based on CP-FOE. The second frequency offset estimate can be the frequency offset estimate obtained based on RS-FOE. The frequency domain signal can be the signal obtained by performing a Fourier transform on the baseband time domain signal after frequency offset compensation at the previous time step.

[0105] Optionally, the terminal can perform frequency offset estimation based on the CP of the current baseband time-domain signal using the front-end CP-FOE module to obtain a first frequency offset estimate, and / or perform frequency offset estimation based on the RS of the previous frequency-domain signal using the rear-end RS-FOE module to obtain a second frequency offset estimate, wherein the frequency-domain signal is obtained by performing FFT processing on the baseband time-domain signal after frequency offset compensation at the previous time. The NCO can perform frequency offset compensation on the baseband time-domain signal output by the DFE module at the current time based on the first and / or second frequency offset estimates, and output the frequency offset-compensated baseband time-domain signal. In some embodiments, the enabling of the RS-FOE module can be determined by the type of the measurement signal. For example, if the measurement signal is an SSB signal, the RS-FOE module is enabled; otherwise, if the measurement signal is a CSI-RS signal, the RS-FOE module is not enabled. In other implementations, the CP-FOE module can be enabled by wbSNR. For example, if wbSNR is greater than a preset SNR threshold, the CP-FOE module is enabled; otherwise, if wbSNR is less than or equal to the preset SNR threshold, the CP-FOE module is not enabled. Furthermore, when the measurement signal is a CSI-RS signal, because the terminal is in a connected state, wbSNR is relatively high, and RS-FOE cannot be achieved. In this case, the SNR threshold can be lowered to enable the CP-FOE module.

[0106] Step S106: Determine the measurement results of the cell measurement based on the baseband time domain signal after frequency offset compensation.

[0107] Optionally, the terminal can perform FFT processing on the frequency offset compensated baseband time-domain signal output by the NCO to obtain a frequency-domain signal, and perform channel estimation and noise estimation on the frequency-domain signal to obtain the cell measurement results, including but not limited to RSSI, RSRP, RSRQ, SINR, etc.

[0108] The aforementioned cell measurement method converts the received measurement signal into a baseband time-domain signal. Based on at least one of a first frequency offset estimate and a second frequency offset estimate, frequency offset compensation is performed on the baseband time-domain signal to obtain a frequency offset-compensated baseband time-domain signal. The first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency-domain signal. The frequency-domain signal corresponds to the baseband time-domain signal at the previous moment. The measurement result of the cell measurement is determined based on the frequency offset-compensated baseband time-domain signal. CP-FOE can be performed using the current baseband time-domain signal, and RS-FOE can be performed using the previous frequency-domain signal. Frequency offset compensation is performed by combining the frequency offset estimates from CP-FOE and RS-FOE. This method is applicable not only to SSB measurement scenarios but also to CSI measurement scenarios, and it has high frequency offset estimation accuracy. It overcomes the limitations of traditional cell measurement in terms of frequency offset resistance scenarios and performance, thus improving the robustness of cell measurement.

[0109] In an exemplary embodiment, prior to step S102, the method may further include: performing time-frequency conversion processing on the baseband time-domain signal after frequency offset compensation at the previous moment to obtain a frequency-domain signal; determining the frequency-domain channel response corresponding to the reference signal of the frequency-domain signal based on the channel estimation result of the frequency-domain signal according to the synchronization signal block measurement signal; and performing frequency offset estimation based on the frequency-domain channel response to obtain a second frequency offset estimate.

[0110] The time-frequency conversion process can be, but is not limited to, FFT. The frequency domain signal can be the frequency domain representation of the baseband time domain signal. The channel estimation result can be, but is not limited to, a detailed estimation result of the channel. The frequency domain channel response can be a mathematical description of the transmission characteristics of the wireless communication channel for signals at different frequencies.

[0111] Optionally, at the previous moment, the terminal can perform time-frequency conversion on the frequency-off compensated baseband time-domain signal to obtain a frequency-domain signal, perform channel estimation on the frequency-domain signal, and obtain a channel estimation result. If the measured signal is an SSB measurement signal, the frequency-domain channel response corresponding to RS in the frequency-domain signal is obtained based on the channel estimation result. Frequency offset estimation is then performed based on the frequency-domain channel response to obtain a second frequency offset estimate, which is used for frequency offset compensation at the current moment. Otherwise, if the measured signal is a CSI-RS measurement signal, frequency offset estimation is not performed using RS; in this case, frequency offset estimation can be performed based on CP. It should be noted that the determination of whether the measured signal is an SSB or CSI-RS measurement signal can be based on the DFE measurement channel. If the DFE measurement channel is an SSB measurement channel, it can be determined to be an SSB measurement signal; if the DFE measurement channel is a CSI-RS measurement channel, it can be determined to be a CSI-RS measurement signal.

[0112] In one implementation, reference Figure 3The baseband time-domain signal output by the NCO at the previous time step can be processed by FFT. The resulting frequency-domain signal is then input into the RawCE module for coarse channel estimation and into the CE module for fine channel estimation. If the measured signal is an SSB signal, the frequency-domain channel response corresponding to RS in the frequency-domain signal can be determined based on the obtained fine channel estimation result. Then, RS-FOE is performed to obtain the second frequency offset estimate. The specific calculation formula for RS-FOE is as follows:

[0113] ;

[0114] in, This is the frequency offset estimate for RS-FOE. For subcarrier spacing, The number of subcarriers for RS-FOE For RS-FOE OFDM symbol spacing, For CP length, For FFT points, For the first Frequency domain channel estimation (frequency domain channel response) for each subcarrier. This indicates the phase take operation. This indicates the conjugate operation. At this point, the frequency offset estimate of the RS-FOE in the frequency domain... The scope is: .

[0115] In this embodiment, the baseband time-domain signal after frequency offset compensation at the previous moment is converted to a frequency domain signal by time-frequency conversion. Based on the synchronization signal block measurement signal, the frequency domain channel response corresponding to the reference signal of the frequency domain signal is determined according to the channel estimation result of the frequency domain signal. Frequency offset is estimated based on the frequency domain channel response to obtain a second frequency offset estimate. In the SSB measurement scenario, RS-FOE can be performed based on the baseband time-domain signal after frequency offset compensation at the previous moment to improve the accuracy of frequency offset estimation. The obtained second frequency offset estimate is used to compensate for the frequency offset of the current baseband time-domain signal, which can improve the anti-frequency offset performance of cell measurement.

[0116] In an exemplary embodiment, prior to step S104 above, the method may further include: obtaining the broadband signal-to-noise ratio (SNR) of the baseband time-domain signal; and, in response to the broadband SNR being greater than a preset SNR threshold, performing frequency offset estimation based on the cyclic prefix of the baseband time-domain signal to obtain a first frequency offset estimate.

[0117] In broadband communication systems, signal-to-noise ratio (WBSNR) is the ratio of signal power to noise power. The SNR threshold can be a pre-set lower limit for SNR.

[0118] Optionally, the terminal can obtain the wbSNR of the baseband time-domain signal at the previous moment. If the wbSNR is greater than the preset SNR threshold, frequency offset estimation can be performed based on the CP of the baseband time-domain signal to obtain a first frequency offset estimate, which is used for frequency offset compensation at the current moment. Otherwise, if the wbSNR is less than or equal to the preset SNR threshold, frequency offset estimation is not performed based on the CP of the baseband time-domain signal. It can be understood that if the measured signal is an SSB signal, frequency offset compensation can be performed using only the second frequency offset estimate obtained from the RS-FOE at the previous moment. If the measured signal is a CSI-RS signal, the SNR threshold can be lowered so that the wbSNR is greater than the SNR threshold, thereby performing CP-FOE.

[0119] In this embodiment, by obtaining the broadband signal-to-noise ratio of the baseband time domain signal, in response to the broadband signal-to-noise ratio being greater than a preset signal-to-noise ratio threshold, frequency offset estimation is performed based on the cyclic prefix of the baseband time domain signal to obtain a first frequency offset estimate. This can reduce the residual frequency offset of subsequent RS-FOE and improve the frequency offset estimation accuracy when the wbSNR is not too low.

[0120] In an exemplary embodiment, the step of obtaining the broadband signal-to-noise ratio of the baseband time-domain signal may specifically include: determining the broadband signal-to-noise ratio of the previous moment based on the channel estimation result of the frequency-domain signal; and determining the broadband signal-to-noise ratio of the previous moment as the broadband signal-to-noise ratio of the baseband time-domain signal.

[0121] Optionally, at the previous moment, the terminal can perform time-frequency conversion on the baseband time-domain signal after frequency offset compensation to obtain a frequency-domain signal, perform channel estimation on the frequency-domain signal to obtain the channel estimation result, and obtain the wbSNR based on the channel estimation result. The terminal can use the wbSNR of the previous moment as the wbSNR of the baseband time-domain signal at the current moment.

[0122] In this embodiment, the broadband signal-to-noise ratio (WNR) of the previous moment is determined based on the channel estimation results of the frequency domain signal. The WNR of the previous moment is then used as the WNR of the baseband time domain signal. Since the channel conditions of two adjacent cell measurements usually do not change much, using the WNR of the previous moment as the WNR of the baseband time domain signal at the current moment can reduce the complexity of cell measurement and improve cell measurement efficiency.

[0123] In an exemplary embodiment, prior to the step of estimating the frequency offset based on the cyclic prefix of the baseband time domain signal to obtain a first frequency offset estimate in response to the broadband signal-to-noise ratio being greater than a preset signal-to-noise ratio threshold, the method may further include: measuring the signal based on the channel state information reference signal and reducing the signal-to-noise ratio threshold.

[0124] Optionally, if the measurement signal is a CSI-RS measurement signal, since only one symbol is available, RS-FOE cannot be performed. Furthermore, the terminal is in a connected state, and wbSNR is relatively high. Therefore, the SNR threshold can be lowered to make wbSNR greater than the SNR threshold, enabling the terminal to perform CP-FOE. In practical applications, if the DFE measurement channel is identified as a CSI-RS measurement channel, a lower SNR threshold can be configured. Correspondingly, wbSNR greater than the SNR threshold can be detected, at which point the CP-FOE module is enabled.

[0125] In this embodiment, by measuring the signal based on the channel state information reference signal and reducing the signal-to-noise ratio threshold, CP-FOE can be enabled when RS-FOE cannot be performed in the CSI-RS measurement scenario, thus ensuring the reliable implementation of frequency offset estimation.

[0126] In an exemplary embodiment, the step of estimating the frequency offset based on the cyclic prefix of the baseband time-domain signal to obtain a first frequency offset estimate may specifically include: delaying the sampling points of the cyclic prefix to obtain a delayed cyclic prefix; and performing time-domain correlation processing based on the delayed cyclic prefix to obtain a first frequency offset estimate.

[0127] The delayed cyclic prefix refers to performing time-domain correlation on a CP delay of several sampling points.

[0128] Optionally, since the delay difference introduced by multipath in cell measurement will directly affect the correlation of frequency offset estimation and cause frequency offset estimation error, in order to combat multipath delay, the terminal can delay the CP by several sampling points to obtain the delayed CP, and use the delayed CP to perform time domain correlation to obtain the first frequency offset estimate.

[0129] In one implementation, a delay can be used to combat multipath delay. The CP at each sampling point is correlated in the time domain. The specific formula for calculating CP-FOE is:

[0130] ;

[0131] in, This is the frequency offset estimate for CP-FOE. For subcarrier spacing, The number of OFDM symbols for CP-FOE, For CP length, The number of sampling points with delay. For FFT points, For the first The OFDM symbol of the first Time-domain received data for each sample point This indicates the phase take operation. This indicates the conjugate operation. At this point, the time-domain CP-FOE frequency offset estimate... The scope is: .

[0132] In this embodiment, by delaying the sampling points of the cyclic prefix, a delayed cyclic prefix is ​​obtained. Time-domain correlation processing is performed based on the delayed cyclic prefix to obtain the first frequency offset estimate. This ensures that the phase rotation of all multipath components is consistent, thereby achieving robust frequency offset estimation in a multipath environment.

[0133] In an exemplary embodiment, step S106 may specifically include: performing time-frequency conversion processing on the baseband time-domain signal after frequency offset compensation to obtain the frequency-domain signal at the current time; performing channel estimation and noise estimation on the frequency-domain signal at the current time to obtain the measurement results of cell measurement; the measurement results include at least one of received signal strength indication, reference signal received power, reference signal received quality, and signal-to-interference-plus-noise ratio.

[0134] Optionally, the terminal can perform time-frequency conversion on the baseband time-domain signal after frequency offset compensation, including but not limited to FFT, to obtain the frequency domain signal at the current time, and perform channel estimation and noise estimation on the frequency domain signal at the current time to obtain measurement results such as RSSI, RSRP, RSRQ, and SINR.

[0135] In this embodiment, the frequency domain signal at the current moment is obtained by performing time-frequency conversion processing on the baseband time domain signal after frequency offset compensation. Channel estimation and noise estimation are then performed on the frequency domain signal at the current moment to obtain the measurement results of cell measurement. Cell measurement can be performed based on the baseband time domain signal after frequency offset compensation, thereby improving the accuracy of cell measurement and thus improving the robustness of cell measurement.

[0136] To facilitate a deeper understanding of the embodiments of this application by those skilled in the art, a specific example will be used for illustration below.

[0137] This application provides a robust cell measurement method that employs a joint frequency offset estimation method using time-domain CP-FOE followed by frequency-domain RS-FOE. By using NCO time-domain frequency offset compensation, it can solve the problems of limited frequency offset resistance and performance in traditional cell measurement.

[0138] The specific processing procedure of this method is as follows: Figure 3 As shown, the measurement signal is received from the antenna, processed by RF and ADC to be converted into a digital intermediate frequency signal, and then processed by DFE to be converted into a digital baseband time domain signal. The DFE selects an appropriate downsampling filter bank according to the SSB or CSI measurement bandwidth, and AGC can adjust the receiving amplitude gain to achieve the best dynamic range and ensure that the ADC does not saturate.

[0139] Before the baseband time-domain signal is processed into a frequency-domain signal by FFT, frequency offset compensation is achieved through NCO. The frequency offset estimate comes from the pre-processor CP-FOE and the post-processor RS-FOE. The CP-FOE is enabled by comparing wbSNR with an SNR threshold; that is, CP-FOE is enabled when wbSNR exceeds the set SNR threshold. The RS-FOE is enabled by the SSB measurement and CSI measurement channels; that is, RS-FOE is enabled when the DFE measurement channel is performing SSB measurement. In addition, the timing estimation information for CP-FOE and FFT windowing is determined by TOE.

[0140] The baseband frequency domain signal after FFT processing is then processed by RawCE to obtain a coarse channel estimate. This coarse channel estimate yields channel parameter information such as time delay offset and Doppler shift, as well as a coarse noise estimate (wbSNR). Based on the parameter estimation information, further processing via FOE, CE, NE, and TOE completes frequency offset estimation, fine channel estimation, fine noise estimation, and timing estimation.

[0141] Finally, based on the frequency domain RSSI statistics from the FFT output and the results of CE and NE, the calculated values ​​of RSSI, RSRP, RSRQ, and SINR from the SSB or CSI measurements are output. After time filtering processing according to L1 and L3, the final measurement results are completed and used for mobility management and beam management.

[0142] Figure 3 Table 1 shows examples of the working modes and parameter settings for each submodule.

[0143] Table 1

[0144]

[0145] The DFE submodule can process the data rate of the SSB and CSI measurement channels, configure different filter banks to adjust the sampling rate and quantization bit width, and also perform functions such as DC bias elimination, IQ imbalance compensation and ACI / CCI suppression processing.

[0146] The AGC submodule can adjust the digital and analog gain of the signal amplitude, and provide gain compensation for different measurement environments based on temperature, frequency, and bandwidth. It can also be configured with the number of gain measurements, starting point and length, and gain coefficient allocation.

[0147] The CP-FOE submodule performs frequency offset estimation based on the received signal and the timing information output by the TOE, and uses it for frequency offset compensation at the current time. The frequency offset compensation is implemented through the NCO.

[0148] The NCO submodule enables digital phase adjustment of the signal for frequency offset compensation in the time domain. The frequency offset estimate is derived from the current frequency offset estimate from the CP-FOE submodule and the previous frequency offset estimate from the RS-FOE submodule. The NCO can be implemented in hardware or software, and its configuration parameters are the phase adjustment step size and the phase offset value.

[0149] The FFT submodule can process digital signals from the time domain to the frequency domain or vice versa, and the corresponding FFT or IFFT points and scaling factor can be configured.

[0150] The RawCE submodule can perform coarse channel estimation in the frequency domain, that is, it uses the LS method to estimate the channel based on the local reference signal and the received signal. The operating parameters include storage configuration for different reference signals, including SSB and CSI-RS.

[0151] The ParaEst submodule, based on the coarse channel estimation results from the RawCE submodule, implements channel parameters such as time delay offset and Doppler offset, as well as coarse noise estimation (wbSNR). Operating parameters include stored configurations for SSB and CSI measurement modes, and preset time delay offset and Doppler offset levels.

[0152] The CE submodule combines coarse channel estimation with channel parameters and noise estimation parameters to complete fine channel estimation. Fine channel estimation includes MMSE filtering and / or DFT smoothing.

[0153] The NE submodule performs fine noise estimation based on the coarse channel estimate from the RawCE output and the fine channel estimate from the CE output. Operating parameters include the smoothing filter length and coefficients.

[0154] The submodule RS-FOE completes the frequency offset estimation based on the frequency domain RS according to the fine channel estimation output by the submodule CE and the fine noise estimation output by the submodule NE, and uses it for frequency offset compensation in the next time step, wherein the frequency offset compensation is implemented through NCO.

[0155] The TOE submodule estimates the timing deviation based on the coarse channel results from the RawCE submodule and the channel parameters and coarse noise estimation results output by the ParaEst submodule, and determines the FFT windowing position of the next time slot and the timing information of the CP-FOE submodule.

[0156] For the CP-FOE submodule, a delay is used to combat multipath latency. The time-domain correlation of each sampling point can be calculated using the following formula:

[0157] ;

[0158] in, This is the frequency offset estimate for CP-FOE. For subcarrier spacing, The number of OFDM symbols for CP-FOE, For CP length, For FFT points, For the first The OFDM symbol of the first Time-domain received data for each sample point This indicates the phase take operation. At this point, the time-domain CP frequency offset estimate is... The scope is: .

[0159] Specifically, CP-FOE is enabled by wbSNR and a set SNR threshold. CP-FOE is enabled when wbSNR is greater than the set SNR threshold; otherwise, it is disabled. This is because CP-FOE can reduce the residual frequency offset of subsequent RS-FOE, improving frequency offset estimation accuracy when SNR is not too low, and with very low complexity. For SSB measurements, at the initial access threshold (e.g., above -6dB), it achieves better performance compared to RS-FOE alone. For CSI measurements, because the SNR is relatively high in the connected state and RS-FOE estimation is not possible, the SNR threshold can be set lower, and CP-FOE is considered enabled by default.

[0160] For the submodule RS-FOE, based on fine channel estimation The specific calculation formula can be:

[0161] ;

[0162] in, This is the frequency offset estimate for RS-FOE. For subcarrier spacing, The number of subcarriers for RS-FOE For RS-FOE OFDM symbol spacing, For CP length, For FFT points, For the first Frequency domain channel estimation for each subcarrier This indicates the phase take operation. At this point, the frequency offset estimate of RS in the frequency domain is... The scope is: .

[0163] Specifically, RS-FOE is enabled by default for SSB measurements and disabled by default for CSI-RS measurements. This is because three symbols are available for each SSB measurement, while only one symbol is available for each CSI-RS measurement.

[0164] The above cell measurement method determines CP-FOE enablement by comparing wbSNR and SNR threshold, and RS-FOE enablement by comparing SSB measurement and CSI measurement channels. For SSB measurement, CP-FOE and RS-FOE are used in joint processing, while for CSI measurement, CP-FOE processing is used. Furthermore, the CP-FOE method in cell measurement needs to consider latency. For processing individual sampling points, the RS-FOE method needs to consider fine-channel estimation. This processing method enables simultaneous coverage of both SSB and CSI measurements, which involve frequency offsets, effectively improving cell measurement accuracy under frequency offset conditions and enhancing the maximum range of frequency offset resistance during cell measurements.

[0165] In one exemplary embodiment, such as Figure 5 As shown, a cell measurement method is provided, which includes the following steps:

[0166] Step S201: Perform time-frequency conversion processing on the baseband time-domain signal after frequency offset compensation at the previous moment to obtain the frequency-domain signal;

[0167] Step S202: Based on the synchronization signal block measurement signal, determine the frequency domain channel response corresponding to the reference signal of the frequency domain signal according to the channel estimation result of the frequency domain signal, and perform frequency offset estimation based on the frequency domain channel response to obtain the second frequency offset estimate value;

[0168] Step S203: Convert the measurement signal received at the current moment into a baseband time domain signal;

[0169] Step S204: Obtain the broadband signal-to-noise ratio of the baseband time domain signal. In response to the broadband signal-to-noise ratio being greater than a preset signal-to-noise ratio threshold, perform frequency offset estimation based on the cyclic prefix of the baseband time domain signal to obtain the first frequency offset estimate.

[0170] Step S205: Based on at least one of the first frequency offset estimate and the second frequency offset estimate, perform frequency offset compensation processing on the baseband time domain signal to obtain the frequency offset compensated baseband time domain signal.

[0171] Step S206: Perform time-frequency conversion processing on the baseband time-domain signal after frequency offset compensation to obtain the frequency-domain signal at the current time. Perform channel estimation and noise estimation on the frequency-domain signal at the current time to obtain the measurement results of cell measurement. The measurement results include at least one of the following: received signal strength indication, reference signal received power, reference signal received quality, and signal-to-interference-plus-noise ratio.

[0172] Optionally, the terminal can perform FFT on the baseband time-domain signal after frequency offset compensation at the previous time step to obtain the frequency-domain signal, perform channel estimation on the frequency-domain signal to obtain the channel estimation result of the frequency-domain signal. If the measured signal is an SSB signal, the frequency-domain channel response of the reference signal in the frequency-domain signal is determined according to the channel estimation result, and RS-FOE is performed according to the frequency-domain channel response to obtain the second frequency offset estimate. Otherwise, if the measured signal is a CSI-RS signal, RS-FOE is not performed. In this case, frequency offset compensation can be performed only according to CP-FOE. In practical applications, this can be achieved by lowering the SNR threshold. At the current moment, after receiving the measurement signal, the terminal can convert the measurement signal into a baseband time-domain signal through the RF module, ADC module, and DFE module. The wbSNR calculated based on the frequency offset compensated baseband time-domain signal from the previous moment is compared with the SNR threshold. If wbSNR is greater than the SNR threshold, CP-FOE is performed on the baseband time-domain signal to obtain the first frequency offset estimate. Otherwise, if wbSNR is less than or equal to the SNR threshold, CP-FOE is not performed, and frequency offset compensation can be performed only based on RS-FOE. Afterwards, the NCO performs frequency offset compensation on the baseband time-domain signal based on the first and / or second frequency offset estimates to obtain the frequency offset compensated baseband time-domain signal. After processing such as FFT, parameter estimation, channel estimation, and noise estimation, the frequency offset compensated baseband time-domain signal can be used to calculate cell measurement results such as RSSI, RSRP, RSRQ, and SINR based on the obtained channel estimation and noise estimation results.

[0173] The above-mentioned cell measurement method can perform CP-FOE using the baseband time-domain signal at the current moment and RS-FOE using the frequency-domain signal at the previous moment. The frequency offset estimates of CP-FOE and RS-FOE are combined for frequency offset compensation. It is applicable not only to SSB measurement scenarios but also to CSI measurement scenarios. Moreover, its frequency offset estimation accuracy is high, overcoming the limitations of traditional cell measurement in terms of anti-frequency offset scenarios and anti-frequency offset performance, and improving the robustness of cell measurement.

[0174] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0175] Based on the same inventive concept, this application also provides a cell measurement device for implementing the cell measurement method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more cell measurement device embodiments provided below can be found in the limitations of the cell measurement method described above, and will not be repeated here.

[0176] In one exemplary embodiment, a cell measurement device is provided, comprising: a signal receiving module, a frequency offset compensation module, and a cell measurement module, wherein:

[0177] The signal receiving module is used to convert the received measurement signal into a baseband time domain signal;

[0178] The frequency offset compensation module is used to perform frequency offset compensation processing on the baseband time domain signal according to at least one of a first frequency offset estimate and a second frequency offset estimate, to obtain a frequency offset compensated baseband time domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time domain signal at the previous moment;

[0179] The cell measurement module is used to determine the measurement results of the cell measurement based on the baseband time-domain signal after frequency offset compensation.

[0180] In an exemplary embodiment, the cell measurement device further includes a second frequency offset estimation module, which is used to perform time-frequency conversion processing on the baseband time-domain signal after frequency offset compensation at the previous moment to obtain the frequency domain signal; based on the synchronization signal block measurement signal, determine the frequency domain channel response corresponding to the reference signal of the frequency domain signal according to the channel estimation result of the frequency domain signal, and perform frequency offset estimation according to the frequency domain channel response to obtain the second frequency offset estimation value.

[0181] In an exemplary embodiment, the cell measurement device further includes a first frequency offset estimation module, used to obtain the broadband signal-to-noise ratio of the baseband time domain signal; in response to the broadband signal-to-noise ratio being greater than a preset signal-to-noise ratio threshold, frequency offset estimation is performed based on the cyclic prefix of the baseband time domain signal to obtain the first frequency offset estimation value.

[0182] In an exemplary embodiment, the first frequency offset estimation module is further configured to determine the broadband signal-to-noise ratio at the previous moment based on the channel estimation result of the frequency domain signal; and to determine the broadband signal-to-noise ratio at the previous moment as the broadband signal-to-noise ratio of the baseband time domain signal.

[0183] In an exemplary embodiment, the first frequency offset estimation module described above is further configured to measure the signal based on the channel state information reference signal and reduce the signal-to-noise ratio threshold.

[0184] In an exemplary embodiment, the first frequency offset estimation module is further configured to delay the sampling points of the cyclic prefix to obtain a delayed cyclic prefix; and to perform time-domain correlation processing based on the delayed cyclic prefix to obtain the first frequency offset estimate.

[0185] In an exemplary embodiment, the cell measurement module is further configured to perform time-frequency conversion processing on the frequency offset compensated baseband time-domain signal to obtain the frequency domain signal at the current time; perform channel estimation and noise estimation on the frequency domain signal at the current time to obtain the measurement result of the cell measurement; the measurement result includes at least one of received signal strength indication, reference signal received power, reference signal received quality, and signal-to-interference-plus-noise ratio.

[0186] Each module in the aforementioned cell measurement device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the communication device in hardware form or independent of it, or stored in the memory of the communication device in software form, so that the processor can call and execute the corresponding operations of each module.

[0187] In one exemplary embodiment, a communication device is provided, which may be a terminal, and its internal structure diagram may be as follows. Figure 6As shown, the communication device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements a cell measurement method. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the communication device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the communication device, or external keyboards, touchpads, or mice, etc.

[0188] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the communication device to which the present application is applied. Specific communication devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0189] In one exemplary embodiment, a communication device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0190] In one exemplary embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above-described method embodiments.

[0191] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0192] In one exemplary embodiment, a chip is provided that includes programmable logic circuitry and / or program instructions, which, when the chip is running, can execute the steps in the above-described method embodiments.

[0193] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0194] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0195] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0196] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for measuring a cell block, characterized in that, The method includes: The received measurement signal is converted into a baseband time domain signal; The baseband time-domain signal is subjected to frequency offset compensation processing based on at least one of the first frequency offset estimate and the second frequency offset estimate to obtain the frequency offset compensated baseband time-domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time-domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time-domain signal at the previous moment. The measurement results of the cell measurement are determined based on the baseband time-domain signal after frequency offset compensation.

2. The method according to claim 1, characterized in that, Before converting the received measurement signal into a baseband time-domain signal, the process also includes: The baseband time-domain signal after frequency offset compensation at the previous time step is subjected to time-frequency conversion processing to obtain the frequency domain signal; Based on the synchronization signal block measurement signal, the frequency domain channel response corresponding to the reference signal of the frequency domain signal is determined according to the channel estimation result of the frequency domain signal. Frequency offset estimation is performed based on the frequency domain channel response to obtain the second frequency offset estimate value.

3. The method according to claim 1, characterized in that, Before performing frequency offset compensation processing on the baseband time-domain signal based on at least one of the first frequency offset estimate and the second frequency offset estimate to obtain the frequency offset compensated baseband time-domain signal, the method further includes: Obtain the broadband signal-to-noise ratio of the baseband time-domain signal; In response to the broadband signal-to-noise ratio being greater than a preset signal-to-noise ratio threshold, frequency offset estimation is performed based on the cyclic prefix of the baseband time-domain signal to obtain the first frequency offset estimate.

4. The method according to claim 3, characterized in that, The step of obtaining the broadband signal-to-noise ratio of the baseband time-domain signal includes: Based on the channel estimation results of the frequency domain signal, determine the broadband signal-to-noise ratio at the previous moment; The broadband signal-to-noise ratio at the previous moment is determined as the broadband signal-to-noise ratio of the baseband time-domain signal.

5. The method according to claim 3, characterized in that, The method further includes: The signal is measured based on the channel state information reference signal, and the signal-to-noise ratio threshold is reduced.

6. The method according to claim 3, characterized in that, The step of estimating the frequency offset based on the cyclic prefix of the baseband time-domain signal to obtain the first frequency offset estimate includes: The sampling points of the cyclic prefix are delayed to obtain the delayed cyclic prefix; The first frequency offset estimate is obtained by performing time-domain correlation processing based on the delayed cyclic prefix.

7. The method according to any one of claims 1 to 6, characterized in that, The step of determining the cell measurement result based on the frequency offset compensated baseband time-domain signal includes: The baseband time-domain signal after frequency offset compensation is subjected to time-frequency conversion processing to obtain the frequency-domain signal at the current moment; Channel estimation and noise estimation are performed on the frequency domain signal at the current moment to obtain the measurement results of the cell measurement; the measurement results include at least one of received signal strength indication, reference signal received power, reference signal received quality, and signal-to-interference-plus-noise ratio.

8. A community measurement device, characterized in that, The device includes: The signal receiving module is used to convert the received measurement signal into a baseband time domain signal; The frequency offset compensation module is used to perform frequency offset compensation processing on the baseband time domain signal according to at least one of a first frequency offset estimate and a second frequency offset estimate, to obtain a frequency offset compensated baseband time domain signal; the first frequency offset estimate is obtained based on the cyclic prefix of the baseband time domain signal, and the second frequency offset estimate is obtained based on the reference signal of the frequency domain signal, wherein the frequency domain signal corresponds to the baseband time domain signal at the previous moment; The cell measurement module is used to determine the measurement results of the cell measurement based on the baseband time-domain signal after frequency offset compensation.

9. A communication device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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