Radar performance determination method and device and computer equipment

Abstract

The invention relates to the technical field of communication, in particular to a radar performance determination method and device and computer equipment. The method comprises the following steps: converting a radar signal sent by a target radar to obtain a plurality of subcarrier signals; analyzing the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform comprises a pulse waveform or a frequency modulation continuous waveform; determining an effective signal corresponding to each subcarrier signal according to the signal waveform; and determining the radar performance of the target radar according to the signal performance parameters of the effective signals corresponding to the subcarrier signals.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a radar performance determination method, device and computer equipment. Background Art

[0002] Radar interawareness integration refers to the integration of radar's perception function with communication technology to form an integrated system that can detect, track and identify targets and realize data communication. The radar interawareness fusion signal is a signal transmitted in the radar interawareness integration system, which carries both perception information and communication information. This signal uses the electromagnetic waves emitted by the radar to detect and track targets, and uses communication protocols to transmit detection results or related data to other systems or devices.

[0003] At present, the synaesthesia fusion signal is processed by orthogonal frequency division multiplexing (OFDM) technology. The specific process is as follows: the synaesthesia fusion signal in digital form is mapped to different subcarriers (each subcarrier corresponds to a different resource block). The signal on each subcarrier is inverse fast Fourier transformed to convert the signal from the frequency domain to the time domain. The parallel signal after the inverse fast Fourier transform is converted into a serial signal, and the digital-to-analog conversion is performed to generate an analog OFDM signal, that is, an analog radar signal.

[0004] However, the allocation of subcarriers is discontinuous in the time and frequency domains, so how to evaluate the radar performance in analog form as a whole is an urgent problem to be solved. Summary of the invention

[0005] Based on this, it is necessary to provide a radar performance determination method, device and computer equipment that can improve the accuracy of radar performance evaluation in response to the above technical problems.

[0006] In a first aspect, the present application provides a radar performance determination method, the method comprising:

[0007] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0008] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0009] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0010] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0011] In one embodiment, determining the valid signal corresponding to each subcarrier signal according to the signal waveform includes:

[0012] If the signal waveform is a pulse waveform, for each subcarrier signal, determining a first time period and a second time period in the carrier time period corresponding to the subcarrier signal; wherein the level value of the subcarrier signal in the first time period is higher than the level value of the subcarrier signal in the second time period;

[0013] The signal in the subcarrier signal that is in the first time period is used as the valid signal corresponding to the subcarrier signal.

[0014] In one embodiment, extracting a valid signal corresponding to each subcarrier signal according to the signal waveform includes:

[0015] If the signal waveform is a frequency modulated continuous waveform, then for each subcarrier signal, the subcarrier signal is used as a valid signal corresponding to the subcarrier signal.

[0016] In one embodiment, determining the radar performance of the target radar according to the signal performance parameters of the effective signal corresponding to each subcarrier signal includes:

[0017] The radar performance of the target radar is determined according to the mean value of the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0018] In one embodiment, a radar signal emitted by a target radar is transformed to obtain a plurality of subcarrier signals, including:

[0019] Multiple subcarrier signals are obtained by transforming radar signals through orthogonal frequency division multiplexing modulation technology.

[0020] In one embodiment, the signal performance parameter is determined based on a signal-to-noise ratio and a scale factor;

[0021] The scale factor is determined according to the modulation and coding method of the radar signal, as well as the channel characteristics and noise level when the target radar sends the radar signal.

[0022] In a second aspect, the present application further provides a radar performance determination device, comprising:

[0023] A transformation module, used for transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0024] A waveform determination module is used to analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0025] A signal extraction module, used to determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0026] The performance determination module is used to determine the radar performance of the target radar according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0027] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0028] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0029] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0030] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0031] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0032] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

[0033] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0034] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0035] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0036] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0037] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0038] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0039] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0040] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0041] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0042] The above-mentioned radar performance determination method, device and computer equipment, the present application accurately identifies and extracts the effective signal of the subcarrier signal, and the technical solution can more accurately evaluate the radar performance. This helps to reduce the evaluation error caused by noise and interference and improve the reliability of the evaluation results. The present application is applicable to a variety of signal waveforms (such as pulse waveforms and frequency-modulated continuous waveforms), showing good system adaptability. This means that no matter what signal format the radar system uses, the present application can perform effective performance evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0044] FIG1 is a schematic diagram of a flow chart of a radar performance determination method according to an embodiment;

[0045] FIG2 is a flowchart of steps for determining a valid signal corresponding to each subcarrier signal in one embodiment;

[0046] FIG3 is a block diagram of a radar performance determination device in one embodiment;

[0047] FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] In radar inter-sensory integration, the perception fusion signal refers to the signal transmitted in the system after combining the radar's perception function with communication technology. This signal carries both perception information and communication information, realizing the comprehensive functions of target detection, tracking and identification, and data communication. In order to transmit more data under limited spectrum resources, the radar uses OFDM technology to process the perception fusion signal.

[0050] In the use scenario of communication systems, in OFDM systems, since communication resources are divided into time-frequency domain resource graphs, the time and subcarriers occupied by each system user are often discontinuous. This discontinuity poses a challenge to system-level performance evaluation, because traditional evaluation methods may not accurately reflect the overall communication performance of system users on discontinuous resources. To solve this problem, the Exponential Effective SIRMapping (EESM) algorithm was developed. The basic principle of the Exponential Effective SIRMapping EESM algorithm is to integrate the subcarrier signal-to-noise ratio measurements of different resource blocks into a system-level equivalent signal-to-noise ratio through a specific function. This equivalent signal-to-noise ratio can be used as a comprehensive indicator to estimate the overall communication performance of the communication system.

[0051] Traditional technology uses the exponential effective signal-to-noise ratio mapping EESM algorithm in radar, and specifically uses the following formula (1) to determine the performance of the radar;

[0052] (1)

[0053] in, is the equivalent signal-to-noise ratio of the radar, is the scale factor, v is the number of subcarriers contained in the resource block, is the signal-to-noise ratio measured on the nth subcarrier.

[0054] In the above formula (1), the principle of selecting the exponential function is that all subcarrier signals in communication are independent and identically distributed random signals. Subcarriers with high signal-to-noise ratio will make a greater contribution to communication, while subcarrier systems with low signal-to-noise ratio will avoid using these resources within the coherence time and the corresponding frequency range. Therefore, the contribution weight to communication performance will be very small, which is in line with the trend of the exponential function.

[0055] However, in radar perception, whether it is a radar signal in the form of a pulse or a radar signal in the form of a frequency modulated continuous wave, it is a deterministic signal. The conversion method of the exponential function in the above formula (1) is not applicable to this scenario, so it is urgently needed to be improved.

[0056] In an exemplary embodiment, as shown in FIG1 , a radar performance determination method is provided, which is described by taking the method applied to a computer device as an example, and includes:

[0057] S101, transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals.

[0058] Optionally, the multiple subcarrier signals are obtained by transforming the radar signal through orthogonal frequency division multiplexing modulation technology.

[0059] Specifically, the original analog signal emitted by the radar is sampled and quantized to convert it into a digital signal. This step needs to satisfy the Nyquist sampling theorem, that is, the sampling frequency is at least twice the highest frequency of the signal. According to actual needs, the sampled digital signal is modulated to load the information onto the carrier. The modulated serial signal is converted into a parallel signal in preparation for distribution to multiple subcarriers.

[0060] The modulated serial signal is converted into parallel signals in preparation for distribution to multiple subcarriers. The parallel signals are subjected to an inverse fast Fourier transform to convert the signal from the frequency domain to the time domain. This step is the core of OFDM modulation, which implements the distribution of the signal on multiple orthogonal subcarriers. In order to eliminate the inter-symbol interference (ISI) caused by the multipath effect, a cyclic prefix is ​​added between each OFDM symbol. The cyclic prefix is ​​usually a copy of the tail of the OFDM symbol, which ensures that the signal can still maintain the orthogonality between subcarriers after passing through the multipath channel. The signal after the inverse fast Fourier transform (IFFT) and the addition of the cyclic prefix is ​​up-converted to the RF band in preparation for transmission through the antenna. In the RF band, the signal is actually composed of multiple subcarrier signals superimposed. In practical applications, it is usually not necessary to explicitly separate each subcarrier signal. The receiver will use the orthogonality between subcarriers to restore the original signal.

[0061] S102, analyzing the radar signal to obtain a signal waveform of the radar signal.

[0062] The signal waveform includes a pulse waveform or a frequency modulated continuous waveform.

[0063] It can be understood that a pulsed radar signal refers to a radar system that transmits a series of discrete, short-duration pulse signals and receives echo signals from the target in the intervals between pulses. The transmitted waveform is a rectangular pulse that works at a certain or staggered repetition period. The width, amplitude, and repetition frequency of the pulse signal can be adjusted as needed to achieve different detection performance. Pulse radar can accurately measure the distance and speed of the target, but there may be a detection blind spot in the close range.

[0064] It can be understood that the radar signal in the form of frequency modulated continuous wave (FMCW) means that the radar system transmits a continuous wave signal with a continuously changing frequency and receives the echo signal reflected by the target. By processing the frequency difference between the transmitted signal and the echo signal, the distance and speed information of the target can be obtained. The transmitted signal is a continuously changing continuous wave, not a discrete pulse signal. The frequency difference between the transmitted signal and the received signal is related to the distance and speed of the target. By measuring the frequency difference, the target can be detected and measured. FMCW radar transmits a continuous wave with a changing frequency during the frequency sweep cycle. The echo reflected by the object has a certain frequency difference with the transmitted signal. By measuring the frequency difference, the distance information between the target and the radar can be obtained. In theory, FMCW radar does not have the ranging blind area that exists in pulse radar, and the average power of the transmitted signal is equal to the peak power, so only low-power devices are required, thereby reducing the probability of interception and interference.

[0065] Optionally, a high-speed analog-to-digital converter is used to sample and quantize the preprocessed analog radar signal and convert it into a digital signal. According to the transmission modulation mode of the radar signal (such as pulse modulation, frequency modulation, phase modulation, etc.), the received digital signal is demodulated accordingly to restore the original baseband signal. The demodulated signal is processed by a signal processing algorithm (such as pulse compression, moving target display, Doppler filtering, etc.) to extract the waveform characteristics of the radar signal. These waveform characteristics may include pulse width, pulse repetition interval, center frequency, bandwidth, pulse duration, arrival direction, etc.

[0066] S103: Determine the valid signal corresponding to each subcarrier signal according to the signal waveform.

[0067] Optionally, according to the characteristics of the signal waveform (pulse waveform or frequency modulated continuous waveform), each subcarrier signal is analyzed to extract the corresponding valid signal, which includes the steps of removing noise, interference and redundant information.

[0068] For example, a subcarrier signal in the form of a pulse wave is subjected to time window processing, and only the signal within the pulse duration is retained as a valid signal to remove noise and interference outside the pulse.

[0069] For example, the effective signal in the subcarrier signal in the form of an FM wave mainly refers to the signal component generated by the FM process and can reflect the characteristics of the modulated signal. In the FM wave, the frequency of the carrier changes with the modulated signal, while the amplitude of the carrier remains unchanged. Therefore, the effective signal is mainly reflected in the frequency component of the FM wave that changes with the modulated signal.

[0070] S104, determining the radar performance of the target radar according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0071] Specifically, the signal performance parameters of the effective signals corresponding to each subcarrier signal are fused. This may involve statistical methods such as weighted averaging and principal component analysis (PCA) to derive an index system that comprehensively reflects radar performance. Based on the fused signal performance parameter index system, combined with the specific application scenarios and requirements of the radar system, the radar performance of the target radar is determined. This may include the radar's detection range, detection accuracy, velocity resolution, anti-interference capability and other aspects.

[0072] The above radar performance determination method, this application accurately identifies and extracts the effective signal of the subcarrier signal, and the technical solution can more accurately evaluate the radar performance. This helps to reduce the evaluation error caused by noise and interference and improve the reliability of the evaluation results. This application is applicable to a variety of signal waveforms (such as pulse waveforms and frequency-modulated continuous waveforms), showing good system adaptability. This means that no matter what signal format the radar system uses, this application can perform effective performance evaluation.

[0073] In an exemplary embodiment, as shown in FIG2 , determining the valid signal corresponding to each subcarrier signal according to the signal waveform includes:

[0074] S201: If the signal waveform is a pulse waveform, then for each subcarrier signal, determine a first time period and a second time period within a carrier time period corresponding to the subcarrier signal.

[0075] The level value of the subcarrier signal in the first time period is higher than the level value of the subcarrier signal in the second time period.

[0076] It is understood that the first time period is a period of time when the subcarrier signal level value is high. In a pulse waveform, this usually corresponds to the rising edge, top or falling edge of the pulse, depending on the shape of the pulse and the modulation method. The second time period is a period of time when the subcarrier signal level value is low. In a pulse waveform, this usually corresponds to the interval between pulses or the bottom of the pulse.

[0077] Specifically, it is necessary to clarify the overall carrier time period corresponding to each subcarrier signal in the pulse waveform. This is usually determined based on the modulation method of the signal and the characteristics of the pulse waveform. Within the carrier time period, the time period is divided into the first time period and the second time period according to the signal level value. The level value is the key basis for dividing the first time period and the second time period. The level value can be judged by setting a threshold. The time period above the threshold is the first time period, and the time period below the threshold is the second time period. The setting of the threshold can be determined based on factors such as the noise level and modulation depth of the signal.

[0078] By dividing the first time period and the second time period, the effective signal part in the subcarrier signal can be effectively identified. In a pulse waveform, the effective signal usually corresponds to the main part of the pulse (i.e., the period with a higher level value), while the interval between pulses or the part at the bottom of the pulse may contain less effective information or mainly noise.

[0079] S202: Use a signal in the subcarrier signal that is in the first time period as a valid signal corresponding to the subcarrier signal.

[0080] It is understandable that the signal in the subcarrier signal in the first time period is taken as the valid signal corresponding to the subcarrier signal. This is because the signal level value in the first time period is higher and is more likely to contain useful information or reflect the characteristics of the target, while the signal in the second time period may be mainly noise or contain less valid information.

[0081] Specifically, the above-mentioned effective signal extraction process can be implemented by a switching function: define a switching function, which is 1 (or "on" state) in the first time period and 0 (or "off" state) in the second time period. The definition of the switching function can be based on a timestamp, a signal level threshold or other relevant parameters. Apply the defined switching function to the subcarrier signal. This can be achieved by multiplying the subcarrier signal with the switching function: in the first time period (the switching function is 1), the subcarrier signal is retained as a valid signal. In the second time period (the switching function is 0), the subcarrier signal is suppressed or set to zero because it is regarded as a part that does not contain valid information. By applying the switching function, the valid signal located in the first time period can be extracted from the original subcarrier signal.

[0082] In an exemplary embodiment, extracting valid signals corresponding to each subcarrier signal according to the signal waveform includes: if the signal waveform is a frequency modulated continuous waveform, then for each subcarrier signal, taking the subcarrier signal as the valid signal corresponding to the subcarrier signal.

[0083] Optionally, for a frequency modulated continuous waveform, since its subcarrier signal is valid throughout the entire waveform duration, no additional time period division or selection is required, and each separated subcarrier signal is directly regarded as its corresponding valid signal.

[0084] Through this method, the effective signal corresponding to each subcarrier signal can be simply and effectively extracted from the frequency-modulated continuous waveform, providing an accurate and reliable data basis for subsequent signal processing and analysis.

[0085] In an exemplary embodiment, the radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal, including: determining the radar performance of the target radar according to the average value of the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0086] Optionally, signal performance parameters of the effective signal may include signal-to-noise ratio (SNR), bit error rate (BER), frequency stability, phase noise, etc., depending on the characteristics of the radar system and evaluation requirements.

[0087] For each subcarrier signal, calculate the signal performance parameters of its effective signal. These parameters can be obtained by signal processing algorithms, measurement equipment, or simulation models. After obtaining the performance parameters of all subcarrier signals, calculate the mean of these parameters. The mean is a statistic used to indicate the central tendency or average level of the data. Based on the calculated mean, evaluate the radar performance of the target radar. If the mean is high, it means that the overall performance of the radar system is good; otherwise, it means that there may be problems with the performance.

[0088] In this embodiment, the signal performance parameter is determined according to the signal-to-noise ratio and the scale factor.

[0089] The scale factor is determined according to the modulation and coding method of the radar signal, as well as the channel characteristics and noise level when the target radar sends the radar signal.

[0090] It is understandable that the signal-to-noise ratio (SNR) is an important parameter to measure the clarity of the signal in the noise. Its full name in English is Signal-to-Noise Ratio. It is usually expressed as the ratio of signal power to noise power, expressed in decibels (dB). A high signal-to-noise ratio means that the signal is more prominent in the noise, thereby improving the accuracy of target detection and the overall performance of the system.

[0091] It can be understood that the scale factor in this embodiment is the above scale factor , which is determined according to the modulation and coding methods of the radar signal, as well as the channel characteristics and noise level when the target radar sends the radar signal. This factor reflects the scale changes that may occur in the radar signal during transmission, which may be caused by many factors, such as signal modulation, coding, channel multipath effect, scattering, attenuation, etc.

[0092] Specifically, the scaling factor β can only be obtained through actual measurement or simulation in different environments. For example, the signal-to-noise ratio of different subcarriers is measured in the system, and the actual distance is determined by the Global Positioning System (GPS) or a rangefinder, and the optimal value of β is obtained through reverse calculation.

[0093] Exemplarily, in this embodiment, determining the valid signal corresponding to each subcarrier signal according to the signal waveform includes the following two cases:

[0094] (Case 1): For a pulse waveform subcarrier signal, since its effective subcarrier signal-to-noise ratio is concentrated in the pulse part and the idle part does not contribute to the signal-to-noise ratio, a switching function is used to achieve this conversion, as shown in formula (2):

[0095]

[0096] Among them, h The function is shown in the following formula (3):

[0097] (3)

[0098] Wherein, v is the number of OFDM subcarriers in the echo pulse signal.

[0099] β is an optimization factor related to the modulation and coding method.

[0100] τ is the width of the echo pulse.

[0101] (Case 2): For subcarrier signals in the form of frequency modulated continuous waves, since the echo signal energy is evenly distributed, it is generally believed that the signal-to-noise ratio of the entire echo signal subcarrier is equally important. Therefore, the equivalent signal-to-noise ratio formula can be regarded as the average value of each subcarrier, as shown in the following formula (4):

[0102] (4)

[0103] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0104] Based on the same inventive concept, the embodiment of the present application also provides a radar performance determination device for implementing the radar performance determination method involved above. The implementation solution provided by the device to solve the problem is similar to the implementation solution recorded in the above method, so the specific limitations in one or more radar performance determination device embodiments provided below can refer to the limitations of the radar performance determination method above, and will not be repeated here.

[0105] In an exemplary embodiment, as shown in FIG3 , a radar performance determination device is provided, comprising: a transformation module 11, a waveform determination module 12, a signal extraction module 13 and a performance determination module 14, wherein:

[0106] A transformation module 11 is used to transform the radar signal sent by the target radar to obtain multiple subcarrier signals;

[0107] The waveform determination module 12 is used to analyze the radar signal to obtain the signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0108] The signal extraction module 13 is used to determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0109] The performance determination module 14 is used to determine the radar performance of the target radar according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0110] In one embodiment, the signal extraction module 12 is further used to: if the signal waveform is a pulse waveform, determine, for each subcarrier signal, a first time period and a second time period in a carrier time period corresponding to the subcarrier signal; wherein a level value of the subcarrier signal in the first time period is higher than a level value of the subcarrier signal in the second time period;

[0111] The signal in the subcarrier signal that is in the first time period is used as the valid signal corresponding to the subcarrier signal.

[0112] In one embodiment, the signal extraction module 12 is further configured to: if the signal waveform is a frequency modulated continuous waveform, then for each subcarrier signal, use the subcarrier signal as a valid signal corresponding to the subcarrier signal.

[0113] In one embodiment, the signal extraction module 12 is further used to determine the radar performance of the target radar according to the average value of the signal performance parameter of the effective signal corresponding to each subcarrier signal.

[0114] In one embodiment, the transformation module 11 is further used for: the plurality of subcarrier signals are transformed from the radar signal through orthogonal frequency division multiplexing modulation technology.

[0115] In one embodiment, the signal performance parameter is determined based on a signal-to-noise ratio and a scale factor; wherein the scale factor is determined based on a modulation method and a coding method of the radar signal, and a channel characteristic and a noise level when the target radar sends the radar signal.

[0116] Each module in the above radar performance determination device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0117] In an exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in FIG4. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data of a radar performance determination method. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a radar performance determination method is implemented.

[0118] Those skilled in the art will understand that the structure shown in FIG. 4 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0119] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0120] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0121] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0122] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0123] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0124] In one embodiment, when the processor executes the computer program, the following steps are also implemented: if the signal waveform is a pulse waveform, then for each subcarrier signal, a first time period and a second time period within the carrier time period corresponding to the subcarrier signal are determined; wherein a level value of the subcarrier signal within the first time period is higher than a level value of the subcarrier signal within the second time period; and a signal in the subcarrier signal located within the first time period is used as a valid signal corresponding to the subcarrier signal.

[0125] In one embodiment, when the processor executes the computer program, the following steps are further implemented: if the signal waveform is a frequency modulated continuous waveform, then for each subcarrier signal, the subcarrier signal is used as a valid signal corresponding to the subcarrier signal.

[0126] In one embodiment, when the processor executes the computer program, the following steps are further implemented: determining the radar performance of the target radar according to the average value of the signal performance parameter of the effective signal corresponding to each subcarrier signal.

[0127] In one embodiment, when the processor executes the computer program, the following steps are further implemented: a plurality of subcarrier signals are obtained by transforming the radar signal through orthogonal frequency division multiplexing modulation technology.

[0128] In one embodiment, the signal performance parameter is determined based on a signal-to-noise ratio and a scale factor; wherein the scale factor is determined based on a modulation method and a coding method of the radar signal, and a channel characteristic and a noise level when the target radar sends the radar signal.

[0129] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0130] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0131] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0132] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0133] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0134] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: if the signal waveform is a pulse waveform, then for each subcarrier signal, a first time period and a second time period within the carrier time period corresponding to the subcarrier signal are determined; wherein a level value of the subcarrier signal within the first time period is higher than a level value of the subcarrier signal within the second time period; and a signal in the subcarrier signal located within the first time period is used as a valid signal corresponding to the subcarrier signal.

[0135] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: if the signal waveform is a frequency modulated continuous waveform, then for each subcarrier signal, the subcarrier signal is used as a valid signal corresponding to the subcarrier signal.

[0136] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining the radar performance of the target radar according to the average value of the signal performance parameter of the effective signal corresponding to each subcarrier signal.

[0137] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: a plurality of subcarrier signals are obtained by transforming the radar signal through orthogonal frequency division multiplexing modulation technology.

[0138] In one embodiment, the signal performance parameter is determined based on a signal-to-noise ratio and a scale factor; wherein the scale factor is determined based on a modulation method and a coding method of the radar signal, and a channel characteristic and a noise level when the target radar sends the radar signal.

[0139] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0140] Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals;

[0141] Analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform;

[0142] Determine the valid signal corresponding to each subcarrier signal according to the signal waveform;

[0143] The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

[0144] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: if the signal waveform is a pulse waveform, then for each subcarrier signal, a first time period and a second time period within the carrier time period corresponding to the subcarrier signal are determined; wherein a level value of the subcarrier signal within the first time period is higher than a level value of the subcarrier signal within the second time period; and a signal in the subcarrier signal located within the first time period is used as a valid signal corresponding to the subcarrier signal.

[0145] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: if the signal waveform is a frequency modulated continuous waveform, then for each subcarrier signal, the subcarrier signal is used as a valid signal corresponding to the subcarrier signal.

[0146] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: determining the radar performance of the target radar according to the average value of the signal performance parameter of the effective signal corresponding to each subcarrier signal.

[0147] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented: a plurality of subcarrier signals are obtained by transforming the radar signal through orthogonal frequency division multiplexing modulation technology.

[0148] In one embodiment, the signal performance parameter is determined based on a signal-to-noise ratio and a scale factor; wherein the scale factor is determined based on a modulation method and a coding method of the radar signal, and a channel characteristic and a noise level when the target radar sends the radar signal.

[0149] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present 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. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0150] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, 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.

[0151] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A radar performance determination method, characterized in that: The method comprises: Transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals; Analyzing the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform; Determining, according to the signal waveform, a valid signal corresponding to each subcarrier signal; The radar performance of the target radar is determined according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

2. The method according to claim 1, characterized in that The determining, according to the signal waveform, a valid signal corresponding to each subcarrier signal comprises: If the signal waveform is the pulse waveform, then for each subcarrier signal, determining a first time period and a second time period within a carrier time period corresponding to the subcarrier signal; wherein a level value of the subcarrier signal in the first time period is higher than a level value of the subcarrier signal in the second time period; The signal of the subcarrier signal located in the first time period is used as a valid signal corresponding to the subcarrier signal.

3. The method according to claim 1, characterized in that The extracting, according to the signal waveform, a valid signal corresponding to each subcarrier signal comprises: If the signal waveform is the frequency modulated continuous waveform, then for each subcarrier signal, the subcarrier signal is used as a valid signal corresponding to the subcarrier signal.

4. The method according to claim 1, characterized in that: The determining the radar performance of the target radar according to the signal performance parameters of the effective signal corresponding to each subcarrier signal includes: The radar performance of the target radar is determined according to the average value of the signal performance parameter of the effective signal corresponding to each subcarrier signal.

5. The method according to claim 1, characterized in that The radar signal emitted by the target radar is transformed to obtain a plurality of subcarrier signals, including: The multiple subcarrier signals are obtained by transforming the radar signal through orthogonal frequency division multiplexing modulation technology.

6. The method according to any one of claims 1 to 5, characterized in that: The signal performance parameter is determined based on the signal-to-noise ratio and the scale factor; The scale factor is determined according to a modulation mode and a coding mode of the radar signal, and a channel characteristic and a noise level when the target radar sends the radar signal.

7. A radar performance determination device, characterized in that: The device comprises: A transformation module, used for transforming the radar signal emitted by the target radar to obtain multiple subcarrier signals; A waveform determination module, used to analyze the radar signal to obtain a signal waveform of the radar signal; wherein the signal waveform includes a pulse waveform or a frequency modulated continuous waveform; A signal extraction module, used to determine the valid signal corresponding to each subcarrier signal according to the signal waveform; The performance determination module is used to determine the radar performance of the target radar according to the signal performance parameters of the effective signal corresponding to each subcarrier signal.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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