Method and device for testing performance of receiver of frequency hopping communication equipment

Abstract

The invention belongs to the technical field of communication, and particularly discloses a frequency hopping communication equipment receiver performance test method and device, and the method comprises the steps: S1, determining a proper measurement frequency according to the working frequency range of tested equipment, and carrying out the measurement of the frequency hopping communication equipment; according to the measurement frequency, a frequency hopping equipment sensitivity measurement device is utilized to measure and calibrate the transmitting power of a signal of the accompanying measurement equipment; s2, connecting the accompanying test equipment end to a signal source, connecting the tested equipment end to a spectrum analyzer, adjusting the attenuation value of the adjustable attenuator to be 0dB, and measuring and recording the loss of a test link; the receiver sensitivity and the dynamic range of the tested equipment can be tested and obtained in the frequency hopping working state, the technical performance of the tested equipment in the normal working state can be restored and measured to the greatest extent, the dynamic measurement of the performance state of the tested equipment is realized, an objective and accurate evaluation result is given by counting multiple test results, and the test accuracy is improved. Therefore, objective evaluation of the performance of the frequency hopping communication equipment is realized.

Description

Technical Field

[0001] The present invention belongs to the field of communication technologies, and particularly relates to a method and device for testing the performance of a receiver of a frequency-hopping communication device. Background Art

[0002] Frequency-hopping communication is a commonly used spread-spectrum communication method. By continuously changing the carrier frequency of the transmitted signal, it aims to achieve anti-interference, anti-interception, and ensure communication quality. By continuously changing the carrier frequency, frequency-hopping communication makes it difficult for interference signals to continuously track and interfere. In a complex electromagnetic environment with multipath interference, co-channel interference, or adjacent-channel interference, etc., frequency-hopping communication can maintain the stability and reliability of communication; since the carrier frequency of frequency-hopping communication changes randomly, it is difficult for the enemy to predict and capture the communication signal. In occasions such as military communication that require high confidentiality, frequency-hopping communication can play an important role; through reasonable frequency planning and allocation, frequency-hopping communication can enable multiple users to share the same frequency band, improving the utilization rate of the spectrum and the capacity of the communication system; frequency-hopping communication can adapt to different communication environments and service requirements. For example, under different communication distances, transmission rates, and bit error rate requirements, frequency-hopping communication can adjust the frequency-hopping pattern and parameters to meet the requirements;

[0003] Frequency-hopping communication devices have many advantages such as strong anti-interference ability, high anti-interception performance, high spectrum utilization rate, strong adaptability, and anti-fading characteristics, making them play an important role in secure communication. Objectively and accurately testing and evaluating the performance of frequency-hopping communication devices is an important task. The sensitivity of the device is a key technical indicator for measuring the superiority of the communication device performance;

[0004] The traditional method for testing the sensitivity of a receiver of a frequency-hopping communication device is completed in the fixed-frequency communication state. Although this method is easy to operate, it ignores the inaccurate performance evaluation that may be caused by the frequency-hopping working state, and at the same time does not conform to the working conditions of the device itself. Summary of the Invention

[0005] The purpose of the present invention is to provide a method and device for testing the performance of a receiver of a frequency-hopping communication device, so as to achieve objective and accurate testing and evaluation of the sensitivity of the receiver of the frequency-hopping communication device.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A method for testing the performance of a receiver of a frequency-hopping communication device includes:

[0008] S1. According to the working frequency range of the device under test, determine a suitable measurement frequency, and measure and calibrate the transmission power of the signal of the device to be accompanied by using a frequency-hopping device sensitivity measurement device according to the measurement frequency;

[0009] S2. Connect the device under test to the signal source and the device to be measured to the spectrum analyzer. Adjust the attenuation value of the adjustable attenuator to 0 dB and measure and record the loss of the test link.

[0010] S3. Connect the device to be measured and the device under test to the test link and power them on to work in the frequency hopping state. The device to be measured sends an interrogation signal, and the device under test responds. Adjust the attenuation of the adjustable attenuator 1 according to the response result of the device under test, and statistically record the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

[0011] S4. Use the maximum value calculated from the signal power of the device to be measured and the maximum attenuation value when the device under test meets the minimum recognition probability requirement as the receiving sensitivity of the device under test.

[0012] S5. In combination with the sensitivity test, reduce the attenuation of the adjustable attenuator 1, and statistically record the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

[0013] S6. Calculate the receiver dynamic range of the device under test according to the maximum and minimum attenuation values of the adjustable attenuator 1.

[0014] Preferably, determining the appropriate measurement frequency according to the operating frequency range of the device under test includes:

[0015] Remove the antenna of the device to be measured, connect the device to be measured to the power meter using a radio frequency cable, and connect an attenuator with appropriate withstand power and attenuation value in series between the device to be measured and the instrument.

[0016] The selection of the appropriate measurement frequency should follow the principle that the link loss fluctuation of the selected adjacent frequencies should not be too large. For the low frequency band, avoid octave frequencies for adjacent frequencies; for the high frequency band, appropriately increase the interval between adjacent frequencies to moderately reduce the measurement workload.

[0017] Preferably, measuring and calibrating the transmission power of the signal of the device to be measured according to the measurement frequency using a measuring device includes:

[0018] The device to be measured emits a measurement signal according to the appropriate measurement frequency, and uses the power meter to measure and record the signal power P L = p 1 , p 2 ,…p n ;

[0019] Replace the device to be measured with the signal source, send a continuous wave signal with a power of 0 dBm according to the appropriate measurement frequency, and use the power meter to measure and record the signal power P s = p s1 , p s2 …psn ;

[0020] Based on the measured signal power P L and the signal power P s , calculate the signal transmission power of the device under test at the appropriate measurement frequency point. The formula is as follows:

[0021] P source = P L - P s .

[0022] Preferably, the steps of connecting the device under test to the signal source, connecting the DUT to the spectrum analyzer, adjusting the attenuation value of the adjustable attenuator to 0 dB and measuring and recording the loss of the test link include:

[0023] Turn on the signal source and the spectrum analyzer. The signal source sends a single-tone signal. Measure according to the appropriate measurement frequency, and calculate the loss Line of the test link based on the transmitted power of the signal source and the reading of the spectrum analyzer los = L s1 , L s2 …L sn .

[0024] Preferably, during the process of adjusting the attenuation of the adjustable attenuator 1, adjust it step by step in the order of decreasing attenuation, with each adjustment of 1 dB. The sample size of the number of times the device under test sends signals is determined according to the actual situation.

[0025] Preferably, when the attenuation value of the adjustable attenuator 1 appears as 0 dB during the measurement and the DUT can still correctly identify the measured signal, appropriately reduce the attenuation value of the fixed attenuator until the DUT cannot correctly identify the measured signal.

[0026] Preferably, the formula for calculating the receiving sensitivity of the DUT is as follows:

[0027] P sensitivity = P source - L fad_1_max

[0028] P sensitivity = P sen_1 , P sen_2 ,…P sen_n

[0029] Where the maximum value of P sen_1 , P sen_2 ,…P sen_n is taken as the receiving sensitivity of the DUT. P source is the signal power of the device under test, and L fad_1_max is the maximum attenuation value when the DUT meets the minimum recognition probability requirement.

[0030] Preferably, the calculation formula for the dynamic range of the receiver of the device under test is as follows:

[0031] P dynamic_range = L fad_1_max - L fad_1_min

[0032] where P dynamic_range is the dynamic range of the receiver of the device under test, and L fad_1_max is the maximum attenuation value when the device under test meets the minimum recognition probability requirement, and L fad_1_min is the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

[0033] A device for measuring the sensitivity of a frequency-hopping device, which is used for the method for testing the performance of a receiver of a frequency-hopping communication device as described above, includes: the device for measuring the sensitivity of the frequency-hopping device is composed of a fixed attenuator 1, a fixed attenuator 2, a circulator 1, a circulator 2, an isolator 1, an isolator 2, a variable attenuator 1, a variable attenuator 2, and a radio frequency cable;

[0034] The input end of the fixed attenuator 1 is connected to the radio frequency interface of the antenna of the device under test through a radio frequency cable, the output end of the fixed attenuator 1 is connected to the input or output end of the circulator 1, the input end of the circulator 1 is connected to the variable attenuator 1, and the output end of the circulator 1 is connected to the variable attenuator 2;

[0035] The input end of the fixed attenuator 2 is connected to the radio frequency interface of the antenna of the accompanying device under test through a radio frequency cable, the output end of the fixed attenuator 2 is connected to the input or output end of the circulator 2, the input end of the circulator 2 is connected to the isolator 2, and the output end of the circulator 2 is connected to the isolator 1;

[0036] The isolator 1 is connected to the variable attenuator 1 through a radio frequency cable, and the isolator 2 is connected to the variable attenuator 2 through a radio frequency cable.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] The present invention can test and obtain the receiver sensitivity and dynamic range of the device under test in the frequency-hopping working state, restore and measure the technical performance of the device under test in the normal working state to the greatest extent, realize the dynamic measurement of the performance state of the device under test, and give an objective and accurate evaluation result by statistically analyzing the test results of multiple times, so as to realize the objective evaluation of the performance of the frequency-hopping communication device. Description of the Drawings

[0039] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. Among them:

[0040] Figure 1 It is the block diagram of the method steps of the present invention;

[0041] Figure 2 It is the block diagram of the composition of the sensitivity measurement device of the frequency hopping device of the present invention;

[0042] Figure 3 It is the flow block diagram of the method for testing the performance of the receiver of the frequency hopping communication device of the present invention. Specific embodiments

[0043] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention in conjunction with the drawings of the specification.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0045] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0046] As shown in the attached Figure 1 and the attached Figure 3 shown:

[0047] Embodiment 1: This embodiment provides a method for testing the performance of the receiver of a frequency hopping communication device, including:

[0048] S1. According to the operating frequency range [30 MHz, 87.975 MHz] of the device under test, determine appropriate measurement frequencies 30 MHz, 33 MHz, 36 MHz... 88.975 MHz, and use the sensitivity measurement device of the frequency hopping device to measure and calibrate the transmission power of the signal of the device to be accompanied according to the measurement frequencies;

[0049] Specifically, using the measurement device to measure and calibrate the transmission power of the signal of the device to be accompanied according to the measurement frequencies includes:

[0050] The device under test emits measurement signals at appropriate measurement frequencies of 30 MHz, 33 MHz, 36 MHz... 88.975 MHz, and uses a power meter to measure and record the signal power P L = 10.2 dBm, 10.5 dBm, 10.4 dBm... 10.5 dBm;

[0051] Replace the device under test with a signal source, and send a continuous wave signal with a power of 0 dBm at appropriate measurement frequencies of 30 MHz, 33 MHz, 36 MHz... 88.975 MHz, and use a power meter to measure and record the signal power P s = -30.3 dBm, -30.3 dBm, -30.4 dBm... -32.6 dBm;

[0052] Based on the measured signal power P L and the signal power P s , calculate the signal transmission power of the device under test at the appropriate measurement frequencies of 30 MHz, 33 MHz, 36 MHz... 88.975 MHz. The formula is as follows:

[0053] P source = 40.5 dBm, 40.8 dBm, 40.8 dBm... 43.1 dBm;

[0054] S2. Connect the device under test to the signal source and the device under test to the spectrum analyzer. Adjust the attenuation value of the adjustable attenuator to 0 dB and measure and record the loss of the test link;

[0055] Connect the device under test to the signal source and the device under test to the spectrum analyzer. Adjust the attenuation value of the adjustable attenuator to 0 dB and measure and record the loss of the test link, including:

[0056] Turn on the signal source and the spectrum analyzer. The signal source sends a single-tone signal and measures according to the appropriate measurement frequencies of 30 MHz, 33 MHz, 36 MHz... 88.975 MHz. Based on the signal source transmission power and the spectrum analyzer reading, statistically calculate the loss Line of the test link los = 87.2 dB, 87.2 dB, 87.3 dB... 88 dB;

[0057] S3. Connect the device under test and the device under test to the test link and power on to work in the frequency hopping state. The device under test sends an interrogation signal, and the device under test responds. Adjust the attenuation of the adjustable attenuator 1 according to the response result of the device under test, and statistically calculate and record the maximum attenuation value L when the device under test meets the minimum recognition probability requirement fad_1_max = 55 dB;

[0058] During the process of adjusting the attenuation of the adjustable attenuator 1, the adjustment is carried out step by step in the order of decreasing attenuation. Each time, the attenuation is adjusted by 1 dB, and the accompanying device sends signals 400 times;

[0059] S4. According to the signal power P of the accompanying device source = 40.5 dBm, 40.8 dBm, 40.8 dBm…43.4 dBm and the maximum attenuation value L when the device under test meets the minimum recognition probability requirement fad_1_max = 55 dB, the maximum value calculated is taken as the receiving sensitivity of the device under test, -99.9 dBm;

[0060] P sensitivity = -101.7 dBm, -101.4 dBm, -101.5 dBm…-99.9 dBm. Take the maximum value of P sensitivity -99.9 dBm as the receiving sensitivity of the device under test;

[0061] S5. Combining with the sensitivity test, reduce the attenuation of the adjustable attenuator 1, and statistically record the maximum attenuation value L when the device under test meets the minimum recognition probability requirement fad_1_min = 10 dB;

[0062] S6. Calculate the receiver dynamic range of the device under test, 45 dB, according to the maximum attenuation value and the minimum attenuation value of the adjustable attenuator 1.

[0063] This method can test and obtain the receiver sensitivity and dynamic range of the device under test in the frequency hopping working state, restore and measure the technical performance of the device under test in the normal working state to the greatest extent, and realize the dynamic measurement of the performance state of the device under test;

[0064] It can make the communication device work in the frequency hopping state, test its receiving signal sensitivity and dynamic range, and give an objective and accurate evaluation result by statistically analyzing the test results of multiple times, so as to realize the objective evaluation of the performance of the frequency hopping communication device.

[0065] Specifically, according to the working frequency range of the device under test, the appropriate measurement frequencies are determined as follows:

[0066] Remove the antenna of the accompanying device, connect the accompanying device to the power meter with a radio frequency cable, and connect an attenuator with appropriate withstand power and attenuation value in series between the accompanying device and the instrument;

[0067] The selection of appropriate measurement frequencies should follow that the link loss fluctuations of the selected adjacent frequencies should not be too large to avoid expanding the measurement error. For the low-frequency band, the adjacent frequencies should avoid octaves; for the high-frequency band, the interval between adjacent frequencies should be appropriately increased to moderately reduce the measurement workload.

[0068] Specifically, when the attenuation value of the adjustable attenuator 1 appears as 0 dB during the measurement and the device under test can still correctly identify the measurement signal, appropriately reduce the attenuation value of the fixed attenuator until the device under test can no longer correctly identify the measurement signal.

[0069] Specifically, the calculation formula for the received sensitivity of the device under test is as follows:

[0070] P sensitivity =P source -L fad_1_max

[0071] P sensitivity =P sen_1 ,P sen_2 ,…P sen_n

[0072] Among them, take the maximum value of P sen_1 ,P sen_2 ,…P sen_n as the received sensitivity of the device under test, P source is the signal power of the accompanying test device, and L fad_1_max is the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

[0073] Specifically, the calculation formula for the receiver dynamic range of the device under test is as follows:

[0074] P dynamic_range =L fad_1_max -L fad_1_min

[0075] Among them, P dynamic_range is the receiver dynamic range of the device under test, L fad_1_max is the maximum attenuation value when the device under test meets the minimum recognition probability requirement, and L fad_1_min is the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

[0076] As can be seen from the above, the test process is as follows:

[0077] Determine the measurement calibration frequency;

[0078] Calibrate the power of the accompanying test device;

[0079] Build the measurement device and measure and record the test link loss;

[0080] Turn on the device and measure;

[0081] Adjust the attenuation value of the adjustable attenuator 1;

[0082] Whether the recognition probability requirement is met. If it is determined to be no, return to the previous step. If it is determined to be yes, proceed to the next step;

[0083] Statistically calculate the sensitivity and dynamic range of the device under test;

[0084] End.

[0085] As attached Figure 2 shown:

[0086] Embodiment 2: A device for measuring the sensitivity of a frequency-hopping device, which is used for the method for testing the performance of a receiver of a frequency-hopping communication device as described above, includes: The device for measuring the sensitivity of a frequency-hopping device is composed of a fixed attenuator 1, a fixed attenuator 2, a circulator 1, a circulator 2, an isolator 1, an isolator 2, a variable attenuator 1, a variable attenuator 2, and a radio frequency cable;

[0087] The input end of the fixed attenuator 1 is connected to the radio frequency interface of the antenna of the device under test through a radio frequency cable. The output end of the fixed attenuator 1 is connected to the input or output end of the circulator 1. The input end of the circulator 1 is connected to the variable attenuator 1, and the output end of the circulator 1 is connected to the variable attenuator 2;

[0088] The input end of the fixed attenuator 2 is connected to the radio frequency interface of the antenna of the accompanying device under test through a radio frequency cable. The output end of the fixed attenuator 2 is connected to the input or output end of the circulator 2. The input end of the circulator 2 is connected to the isolator 2, and the output end of the circulator 2 is connected to the isolator 1;

[0089] The isolator 1 is connected to the variable attenuator 1 through a radio frequency cable, and the isolator 2 is connected to the variable attenuator 2 through a radio frequency cable.

[0090] As can be seen from the above, at the device under test end and the accompanying device under test end, 40 dB fixed attenuators 1 and 2 are respectively connected according to the device signal transmission power, the maximum power that the two circulators can withstand, etc.;

[0091] The input end of the circulator 1 is connected to a variable attenuator 1 with a step of 1 dB and a maximum of 70 dB. The output end of the circulator 1 is connected to a variable attenuator 2 with a step of 1 dB and a maximum of 70 dB;

[0092] The input end of the circulator 2 is connected to a 40 dB isolator 2, and the output end of the circulator 2 is connected to a 40 dB isolator 1;

[0093] Adjust the attenuation value of the variable attenuator 2 to 50 dB to ensure that when the output signal power of the device under test reaches the accompanying device, it can just normally trigger the accompanying device to work properly.

[0094] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who refer to this disclosure should easily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., changes in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.). For example, elements shown as integrally formed may be composed of multiple parts or elements, the positions of the elements may be inverted or otherwise changed, and the nature, number or position of discrete elements may be altered or changed. Accordingly, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be altered or re-ordered according to alternative embodiments. In the claims, any "means-plus-function" clauses are intended to cover the structures that perform the recited functions herein, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Accordingly, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0095] In addition, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiments may not be described (i.e., those features that are not relevant to the currently contemplated best mode of carrying out the present invention or those features that are not relevant to the implementation of the present invention).

[0096] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous specific implementation decisions may be made. Such development efforts may be complex and time-consuming, but for those of ordinary skill in the art who benefit from this disclosure, the development efforts will be a routine task of design, manufacturing and production without excessive experimentation.

[0097] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention may be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for testing the performance of a frequency hopping communication device receiver, characterized in that: include: S1. Determine a suitable measurement frequency according to the operating frequency range of the device under test, and measure and calibrate the transmission power of the signal of the accompanying device under test using a frequency hopping device sensitivity measurement device according to the measurement frequency; S2. Connect the companion device to the signal source and the device under test to the spectrum analyzer, adjust the attenuation value of the adjustable attenuator to 0 dB, and measure and record the loss of the test link; S3, connecting the companion device and the device under test to the test link and starting them to work in a frequency hopping state, the companion device sends an inquiry signal, the device under test responds, and the attenuation of the adjustable attenuator 1 is adjusted according to the response result of the device under test, and the maximum attenuation value when the device under test meets the minimum recognition probability requirement is counted and recorded; S4, the maximum value calculated according to the signal power of the accompanying test device and the maximum attenuation value when the device under test meets the minimum recognition probability requirement is used as the receiving sensitivity of the device under test; S5. In combination with the sensitivity test, reduce the attenuation of the adjustable attenuator 1, and count and record the maximum attenuation value when the device under test meets the minimum recognition probability requirement; S6. Calculate the dynamic range of the receiver of the device under test according to the maximum attenuation value and the minimum attenuation value of the adjustable attenuator 1.

2. A method for testing the performance of a frequency hopping communication device receiver according to claim 1, characterized in that: Determining a suitable measurement frequency according to the operating frequency range of the device under test includes: Remove the antenna of the accompanying test device, connect the accompanying test device to the power meter using a radio frequency line, and connect an attenuator with appropriate tolerance power and attenuation value in series between the accompanying test device and the instrument; The selection of the appropriate measurement frequency should follow the principle that the link loss fluctuation of the selected adjacent frequencies should not be too large. For the low frequency band, the adjacent frequencies should avoid octaves; for the high frequency band, the interval between adjacent frequencies should be appropriately increased to moderately reduce the measurement workload.

3. A frequency hopping communication equipment receiver performance testing method according to claim 2, characterized in that: The measuring and calibrating the transmission power of the signal of the accompanying test device by using the measuring device according to the measuring frequency includes: The accompanying test equipment transmits a measurement signal according to the appropriate measurement frequency, and uses the power meter to measure and record the signal power P L =p1,p2,…p n ; Replace the accompanying test device with the signal source, send a continuous wave signal with a power of 0 dBm at the appropriate measurement frequency, and use the power meter to measure and record the signal power P s =p s1 ,p s2 …p sn ; According to the measured signal power P L and the signal power P s , calculate the signal transmission power of the companion test device at the appropriate measurement frequency point, the formula is as follows: P source =P L -P s 。 4. A method for testing the performance of a frequency hopping communication device receiver according to claim 3, characterized in that: The method of connecting the companion device end to the signal source and the device under test end to the spectrum analyzer, adjusting the attenuation value of the adjustable attenuator to 0 dB, and measuring and recording the loss of the test link includes: Turn on the signal source and the spectrum analyzer. The signal source sends a single tone signal. The measurement is performed according to the appropriate measurement frequency. The loss Line of the test link is calculated based on the transmission power of the signal source and the reading of the spectrum analyzer. los =L s1 ,L s2 …L sn .

5. A method for testing the performance of a frequency hopping communication device receiver according to claim 1, characterized in that: During the process of adjusting the attenuation of the adjustable attenuator 1 , the attenuation is adjusted step by step from large to small, with 1 dB being adjusted each time. The number of times the accompanying test device sends a signal and the sample volume are determined according to the actual situation.

6. A frequency hopping communication equipment receiver performance testing method according to claim 1, characterized in that: When the attenuation value of the adjustable attenuator 1 is 0 dB during the measurement process and the device under test can still correctly identify the measured signal, the attenuation value of the fixed attenuator is appropriately reduced until the device under test cannot correctly identify the measured signal.

7. A method for testing the performance of a frequency hopping communication device receiver according to claim 1, characterized in that: The receiving sensitivity calculation formula of the device under test is as follows: P sensitivity =P source -L fad_1_max P sensitivity =P sen_1 ,P sen_2 ,…P sen_n Among them, P sen_1 ,P sen_2 ,…P sen_n The maximum value is taken as the receiving sensitivity of the device under test, P source is the signal power of the accompanying test equipment, L fad_1_max It is the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

8. A method for testing the performance of a frequency hopping communication device receiver according to claim 1, characterized in that: The calculation formula of the receiver dynamic range of the device under test is as follows: P dynamic_range =L fad_1_max -L fad_1_min Where P dynamic_range is the receiver dynamic range of the device under test, L fad_1_max L is the maximum attenuation value when the device under test meets the minimum recognition probability requirement. fad_1_min It is the maximum attenuation value when the device under test meets the minimum recognition probability requirement.

9. A frequency hopping device sensitivity measurement device, characterized in that: A frequency hopping communication device receiver performance test method for any one of claims 1 to 8, comprising: the frequency hopping device sensitivity measurement device is composed of a fixed attenuator 1, a fixed attenuator 2, a circulator 1, a circulator 2, an isolator 1, an isolator 2, an adjustable attenuator 1, an adjustable attenuator 2, and a radio frequency cable; The input end of the fixed attenuator 1 is connected to the RF interface of the antenna of the device under test through a RF cable, the output end of the fixed attenuator 1 is connected to the input or output end of the circulator 1, the input end of the circulator 1 is connected to the adjustable attenuator 1, and the output end of the circulator 1 is connected to the adjustable attenuator 2; The input end of the fixed attenuator 2 is connected to the RF interface of the antenna of the accompanying test equipment through a RF cable, the output end of the fixed attenuator 2 is connected to the input or output end of the circulator 2, the input end of the circulator 2 is connected to the isolator 2, and the output end of the circulator 2 is connected to the isolator 1; The isolator 1 is connected to the adjustable attenuator 1 through a radio frequency cable, and the isolator 2 is connected to the adjustable attenuator 2 through a radio frequency cable.

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