Wireless co-measurement system

Abstract

The utility model discloses a wireless co -measurement system, including first signal generator and second signal generator and with first signal generator and second signal generator opposite arrangement and interval first distance's equipment to be measured, still include with equipment to be measured interval second distance setting's accompanying measurement equipment and with equipment to be measured interval third distance setting's frequency spectrometer, first signal generator and second signal generator are connected with equipment to be measured communication to produce interference signal, frequency spectrometer is connected with equipment to be measured communication to detect interference signal, accompanying measurement equipment and equipment to be measured wireless communication connection, equipment to be measured still respectively with comprehensive tester and router communication connection. The utility model discloses through using the signal generator of accurate control signal strength as the interference source, replaced the traditional dependence change distance and unstable wireless electronic product as the interference source's mode, simplified the test erection, improved the accuracy of test result and test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of signal testing technology, and in particular to a wireless co-testing system. Background Technology

[0002] Radio frequency (RF) coexistence is a key metric for evaluating the performance of wireless devices. Current techniques typically assess a device under test (DUT) in a complex electromagnetic environment by placing it in a specific wireless environment and introducing interference signals. However, existing testing methods have some shortcomings: Existing testing methods typically require adjusting the distance between the interference source and the device under test (DUT) to simulate interference of varying intensities. When the DUT has poor performance and a larger distance between the interference source and the DUT is needed, the limited space often prevents accurate measurement of the minimum distance, impacting the accuracy and repeatability of the test results. Currently, most interference sources utilize common wireless electronic devices (such as mobile phones and routers). The signal strength (level) of these devices is difficult to control precisely, and their signal output stability is poor, significantly affecting the accuracy and repeatability of the test results. Furthermore, generating interference signals through data transmission between mobile phones and the comprehensive testing instrument (computer and router) is complex and cumbersome to set up.

[0003] Therefore, there is an urgent need for a wireless coexistence testing system that can overcome the above-mentioned shortcomings, achieve precise control of interference signals, simplify test environment setup, provide more accurate test results, and increase test efficiency. Utility Model Content To overcome the aforementioned shortcomings, the purpose of this invention is to address the problems of distance limitations, uncontrollable and unstable interference signals in existing wireless coexistence testing systems, and to provide a wireless coexistence testing system. This system uses a signal generator instead of traditional wireless electronic products as the interference source, and allows for adjustment of the signal generator's output strength (level), thereby precisely controlling the interference signal, simplifying test setup, and improving the accuracy and efficiency of test results.

[0004] A wireless co-testing system according to this utility model includes a first signal generator and a second signal generator, and a device under test (DUT) disposed opposite to the first signal generator and the second signal generator at a first distance. It also includes a companion test device disposed at a second distance from the DUT and a spectrum analyzer disposed at a third distance from the DUT. The first signal generator and the second signal generator are communicatively connected to the DUT to generate interference signals. The spectrum analyzer is communicatively connected to the DUT to detect interference signals. The companion test device is wirelessly communicatively connected to the DUT. The DUT is also communicatively connected to a comprehensive test instrument and a router, respectively.

[0005] In one or more embodiments of this utility model, the first signal generator and the second signal generator are both mobile phone terminals and computer terminals, and both the first signal generator and the second signal generator can generate 802.11n signals or LTE signals.

[0006] In one or more embodiments of the present invention, a first signal amplifier is further provided between the first signal generator and the device under test, and a second signal amplifier is further provided between the second signal generator and the device under test.

[0007] In one or more embodiments of this utility model, a third signal amplifier is further provided between the spectrum analyzer and the device under test.

[0008] In one or more embodiments of this utility model, the first distance is the minimum distance between the first signal generator, the second signal generator and the device under test.

[0009] In one or more embodiments of this utility model, the second distance is the distance at which the accompanying testing device can work normally.

[0010] In one or more embodiments of this utility model, the 802.11n signal is a radio frequency signal with a bandwidth of 20 MHz and a signal amplitude of 20 dBm EIRP or -20 dBm, which operates at 64 QAM and maximum channel utilization.

[0011] In one or more embodiments of this utility model, the LTE signal is a radio frequency signal with a bandwidth of 10 MHz and a signal amplitude of 23 dBm EIRP or -17 dBm under conducted measurement; the channel utilization of the radio frequency signal is 100%.

[0012] Another aspect of this utility model provides a wireless co-testing system, including a fourth signal amplifier and a device under test (DUT) disposed opposite to the fourth signal amplifier and spaced apart by a first distance, and also including a companion test device disposed at a second distance from the DUT and a spectrum analyzer disposed at a third distance from the DUT; the fourth signal amplifier is communicatively connected to the DUT to generate an interference signal, the spectrum analyzer is communicatively connected to the DUT to detect the interference signal, and a third signal amplifier for amplifying the signal is further provided between the fourth signal amplifier and the DUT.

[0013] The beneficial effects of this utility model are: This utility model uses a signal generator as an interference source, which can accurately set and adjust the parameters of the interference signal (such as signal strength, bandwidth, modulation method, etc.), replacing the traditional method of adjusting the interference intensity by changing the distance, thus improving the accuracy and repeatability of the test.

[0014] This invention uses the signal strength (level) of the signal generator to replace increasing or decreasing the distance to the interference source, thus avoiding the problem of not being able to measure the minimum distance due to site size limitations.

[0015] The signal generated by the signal generator in this invention is stable and continuous, avoiding the problem of unstable signals in traditional wireless electronic products, simplifying the testing process, and greatly improving testing efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the wireless co-measurement system in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the wireless co-measurement system in Embodiment 2 of this utility model.

[0017] In the diagram: First signal amplifier 101, second signal amplifier 102, spectrum analyzer 103, first signal generator 104, second signal generator 105, third signal generator 106, device under test 107, accompanying device 108, comprehensive tester 109, router 110, fourth signal generator 111, and third signal amplifier 112. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "vertical", "horizontal", "top", "bottom", "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] It should be noted that, unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] For the problems mentioned in the background art, please refer to the appendix. Figure 1 As shown, this utility model provides a wireless co-testing system, referring to... Figure 1 This invention provides a wireless co-testing system. The core of this system is to replace traditional unstable interference sources by employing a controllable signal generator for co-existence testing. The system mainly includes: a first signal generator 104, a second signal generator 105, a device under test (DUT) 107, a companion device 108, a spectrum analyzer 103, and optional first signal amplifiers 101, second signal amplifiers 102, and third signal amplifiers 106. Furthermore, the DUT 107 is connected to a comprehensive tester 109 and a router 110 for data exchange and performance monitoring.

[0022] The first signal generator 104 and the second signal generator 105 are key components of this invention. They are used to simulate and generate various wireless interference signals and can precisely adjust their output strength. These signal generators can output, for example, 802.11n or LTE signals. The device under test (DUT) 107 is the target device whose coexistence performance needs to be evaluated. The companion device 108 is wirelessly connected to the DUT 107 and is used to evaluate the DUT's cooperative working capability under interference. The second distance between the companion device and the DUT is set as the maximum range within which the companion device can operate normally. The spectrum analyzer 103 is used to monitor radio frequency signals in the environment in real time, including interference signals and the DUT's own transmitted signals, to provide spectrum analysis data.

[0023] In some embodiments, amplifiers can be added to the signal link to ensure effective transmission or detection of interference signals. For example, a first signal amplifier 101 can be provided between the first signal generator 104 and the device under test 107, and a second signal amplifier 102 can be provided between the second signal generator 105 and the device under test 107 to enhance the strength of the interference signal. Similarly, a third signal amplifier 106 can be provided between the spectrum analyzer 103 and the device under test 107 to improve the sensitivity of signal detection.

[0024] Workflow: First, based on the test requirements of the device under test (DUT), the parameters of the interference signal to be transmitted are precisely configured on the first signal generator 104 and the second signal generator 105. For example, for a Wi-Fi interference scenario, an 802.11n signal can be configured, with specific parameters including: 20MHz bandwidth; signal amplitude set to 20 dBm EIRP (equivalent isotropic radiated power) or -20 dBm under conducted measurements; signal modulation using 64 QAM, operating at maximum channel utilization. For a mobile communication interference scenario, an LTE signal can be configured, with specific parameters including: 10MHz bandwidth; signal amplitude set to 23 dBm EIRP or -17 dBm under conducted measurements; and signal channel utilization set to 100%. These parameters accurately simulate the characteristics of common Wi-Fi and mobile phone signals in real life. The signal generators 104 / 105 are spatially arranged with the DUT 107 via a suitable output antenna, such as a horn antenna (not shown in the figure), and an initial physical distance, such as 1 meter, is set. Meanwhile, the test device 108 and the device under test 107 are placed within the maximum working distance range that allows them to communicate normally, so as to ensure that the test device can properly evaluate the performance of the device under test.

[0025] 802.11n Interference Assessment Procedure: Start the device under test (DUT) 107 and ensure it enters normal wireless operating mode. Turn on the first signal generator 104 to transmit interference signals according to preset 802.11n parameters. Closely observe the operating status of the DUT 107 to determine if it can still operate normally, for example, whether it can maintain normal communication with the companion device 108, or whether its key performance indicators (KPIs) are within acceptable ranges. If the DUT 107 operates normally, gradually increase its output signal strength level through the control interface of the first signal generator 104. If the DUT 107 exhibits abnormal operation, such as communication interruption or significant performance degradation, gradually decrease the signal strength level of the first signal generator 104. Repeat the above adjustment and observation steps until the maximum 802.11n interference signal strength level that the DUT 107 can withstand while maintaining normal operating mode is found. Based on the maximum interference signal strength obtained from the test, and using the RF propagation loss formula L = 20log10(d) + 20log10(f) + 32.44, the minimum operating distance d between the device under test 107 and the interference source under a given interference strength is calculated. Here, L represents the attenuation between the device under test and the signal source, and f is the operating frequency of the device under test.

[0026] LTE interference assessment procedure: After completing the 802.11n test, turn off the first signal generator 104. Then, turn on the second signal generator 105 to transmit interference signals according to preset LTE parameters. Repeat the above test and assessment procedures 3a to 3g to determine the maximum signal strength level that the device under test 107 can withstand in the LTE interference environment and calculate the corresponding minimum operating distance.

[0027] Through the above-described refined and controllable testing methods, this invention can overcome the inherent defects of traditional testing methods such as site limitations and signal instability, and provide more accurate, efficient and reliable data support for the wireless coexistence assessment of the device under test.

[0028] Example 2 like Figure 2 As shown, this utility model also provides a wireless co-testing system, including a fourth signal amplifier 111 and a device under test 107 disposed opposite to the fourth signal amplifier 111 and spaced apart by a first distance. It also includes a companion test device 108 disposed at a second distance from the device under test 107 and a spectrum analyzer 103 disposed at a third distance from the device under test. The fourth signal amplifier 111 is communicatively connected to the device under test 107 to generate an interference signal, and the spectrum analyzer 103 is communicatively connected to the device under test 107 to detect the interference signal. A third signal amplifier 112 for amplifying the signal is also provided between the fourth signal amplifier 111 and the device under test 107. In this embodiment, the signal type and configuration generated by the device are the same as in Embodiment 1, therefore the principle of the same device will not be described in detail here.

[0029] Compared with Embodiment 1, the fourth signal generator 111 in this embodiment can directly generate signal interference to the device under test. The interference signal is amplified by the third signal amplifier 112. Compared with Embodiment 1, it does not require the comprehensive tester 109 and router 110 that are used with mobile phones or computers. Compared with the effect of Embodiment 1, the solution of Embodiment 2 is more convenient to use and simpler to operate.

[0030] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A wireless co-measurement system, characterized in that, The device includes a first signal generator (104) and a second signal generator (105), and a device under test (107) disposed opposite to the first signal generator (104) and the second signal generator (105) and spaced apart by a first distance. It also includes a companion device (108) disposed at a second distance from the device under test (107) and a spectrum analyzer (103) disposed at a third distance from the device under test. The first signal generator (104) and the second signal generator (105) are communicatively connected to the device under test (107) to generate interference signals. The spectrum analyzer (103) is communicatively connected to the device under test (107) to detect interference signals. The companion device (108) is wirelessly communicatively connected to the device under test (107). The device under test (107) is also communicatively connected to a comprehensive tester (109) and a router (110).

2. The wireless co-measurement system according to claim 1, characterized in that, The first signal generator (104) and the second signal generator (105) are both mobile phone terminals and computer terminals. Both the first signal generator (104) and the second signal generator (105) can generate 802.11n signals or LTE signals.

3. The wireless co-measurement system according to claim 1, characterized in that, A first signal amplifier (101) is provided between the first signal generator (104) and the device under test (107), and a second signal amplifier (102) is provided between the second signal generator (105) and the device under test (107).

4. A wireless co-measurement system according to claim 2, characterized in that, A third signal amplifier (106) is also provided between the spectrum analyzer (103) and the device under test (107).

5. A wireless co-measurement system according to claim 1, characterized in that, The first distance is the minimum distance between the first signal generator (104), the second signal generator (105) and the device under test (107).

6. A wireless co-measurement system according to claim 1, characterized in that, The second distance is the distance at which the accompanying testing device (108) can work normally.

7. A wireless co-measurement system according to claim 2, characterized in that, The 802.11n signal is a radio frequency signal with a bandwidth of 20 MHz and an amplitude of 20 dBm EIRP or -20 dBm, which operates at 64 QAM and maximum channel utilization.

8. A wireless co-measurement system according to claim 2, characterized in that, The LTE signal is a radio frequency signal with a bandwidth of 10 MHz and an amplitude of 23 dBm EIRP or -17 dBm under conducted measurement; the channel utilization of this radio frequency signal is 100%.

9. A wireless co-measurement system, characterized in that, The device includes a fourth signal generator (111) and a device under test (107) disposed opposite to the fourth signal generator (111) and spaced apart by a first distance. It also includes a companion device (108) disposed at a second distance from the device under test (107) and a spectrum analyzer (103) disposed at a third distance from the device under test. The fourth signal generator (111) is communicatively connected to the device under test (107) to generate an interference signal. The spectrum analyzer (103) is communicatively connected to the device under test (107) to detect the interference signal. A third signal amplifier (112) for amplifying the signal is also provided between the fourth signal generator (111) and the device under test (107).

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