A wireless interference signal processing system and method

Abstract

The present invention aims to innovate a wireless interference signal processing system and method. The present invention is equipped with two rocket continuous wave interference suppression methods based on the antenna specific signal transmission order. The first method: set the initial state of the rocket to a normally open state, and the newly installed antenna at the midpoint of the two rockets transmits a closed signal. When there is a continuous wave interference signal, the interfered rocket will first receive the closed signal, and then suppress the continuous wave interference signal with this closed signal. The second method: set the initial state of the rocket to a closed state, and the newly installed antenna transmits a continuous wave signal. In this case, the interfered rocket will first receive the continuous wave interference signal, and then receive the signal reception start signal. Through such a difference in the order of receiving, the effect of continuous wave interference suppression is achieved. The present invention effectively solves the problem of continuous wave signal interference during the simultaneous total measurement of two launch vehicles, improves the aerospace test environment, and improves the quality and efficiency of test work.

Description

Technical Field

[0001] The present invention relates to the field of signal processing technology, and in particular to a wireless interference signal processing system and method. Background Art

[0002] In today's aerospace field, the external test systems of various types of rockets face a series of complex technical challenges during operation, among which the co-frequency interference problem of wireless signals of RF products is particularly prominent.

[0003] With the continuous development of aerospace technology, the testing of multiple types of rockets is becoming more and more frequent, and parallel testing has become the norm. In this case, the radio signal point frequencies of the RF products used in the external test systems of various types of rockets are often the same. This leads to the ground wireless signal receiving equipment being inevitably affected by co-frequency interference to varying degrees during the overall testing of multiple types of rockets.

[0004] For example, when rocket A and rocket B are undergoing overall testing at the same time, antenna a will transmit a continuous wave signal to rocket A according to the test process, in order to verify a specific function of rocket A. However, for rocket B, the signal emitted by antenna a is not what it needs, but becomes an interference signal. When the interference signal is received by rocket B, it will cause many troubles to the testing work. First of all, at the signal level, the mixing of interference signals makes the wireless signal received by rocket B complicated, and the signal characteristics originally used to judge the working status of rocket B itself may be masked or distorted by the interference signal. This causes great difficulties for test interpreters when analyzing data, and it is difficult to accurately distinguish between rocket B's own working status signal and the interference signal from rocket A.

[0005] Secondly, from the perspective of judgment accuracy, this interference may cause test interpreters to be unable to accurately judge the true working status of rocket and ground products. In the complex electromagnetic environment of the factory, there is a certain amount of background electromagnetic noise, and the influence of the same-frequency interference signal makes the situation more complicated. Testers are very likely to misjudge the design defects of the product itself as an accidental phenomenon affected by the complex electromagnetic environment of the factory, thereby delaying the discovery and resolution of product problems, and bringing serious potential risks to the research and development and testing of rockets.

[0006] In addition, with the increasing number of space missions and the increasing requirements for test efficiency, high-density launches have become the norm for space testing. Under this situation, it is urgent to solve the problem of co-frequency interference when multiple models are tested in parallel in the same plant. If this problem cannot be effectively solved, it will not only affect the test accuracy and reliability of a single rocket, but also reduce the efficiency of the entire test work as a whole, increase the test cost and time cost, and may have an adverse impact on the progress and quality of the space project.

[0007] Through searching patent documents, it is found that the patent with publication number CN 112953665 A discloses an interference test system, interference signal modulation and its power detection method. The system includes: wireless communication equipment; interference signal transmission system, used to transmit interference signals; interference signals include: broadband noise interference signals, pulse interference signals and combined interference signals; interference signal detection equipment, set on the Beidou navigation and positioning equipment to be tested, used to detect the power value of the interference signal and send the power value to the interference signal transmission system through the wireless communication equipment; the interference signal transmission system adjusts the current power value of the interference signal according to the power value and the power threshold. The patent system composition and signal processing flow are complex, such as the interference test system involves multiple devices and parameter configurations.

[0008] To sum up, in order to effectively solve the problem of co-frequency interference during parallel testing of multiple models of rockets, improve test efficiency, and ensure the accuracy of test interpretation, it has become a key task to study a wireless interference signal processing system and method. Summary of the invention

[0009] In view of the defects in the prior art, an object of the present invention is to provide a wireless interference signal processing system and method.

[0010] A wireless interference signal processing system provided by the present invention includes:

[0011] A signal multi-channel acquisition module is used to convert analog signals in wireless signals into digital signals that can be processed. The signal multi-channel acquisition module includes multiple chips and communication modules;

[0012] The signal interference suppression module adopts the method of setting a new antenna at the midpoint of the two rockets. The new antenna cooperates with the source antenna that transmits the interference signal to transmit different signals. At the same time, different receiving states of the two rockets are set. The rocket continuous wave interference suppression method based on the antenna specific signal transmission sequence is used to realize the conversion of the interfered digital signal into an interference-free digital signal.

[0013] The method for suppressing rocket continuous wave interference based on the antenna specific signal transmission sequence is as follows: rocket A and rocket B are initially set to a normally open state, antenna c transmits a closing signal, antenna a sends a continuous wave signal, and the interfered rocket B first receives the closing signal from antenna c, and then receives the continuous wave signal from antenna a, thereby suppressing continuous wave interference; or

[0014] Set rocket A and rocket B to be in the closed state initially, antenna c sends a continuous wave signal, and antenna a sends an open signal. The interfered rocket B first receives the continuous wave interference signal from antenna c, and then receives the open signal from antenna a;

[0015] The comprehensive testing equipment receives the digital signal processed by the signal interference suppression module and transmits it to the interpretation software for manual interpretation.

[0016] Preferably, the signal multi-channel acquisition module includes 4 AD9364 signal acquisition chips, 1 XC7Z100-2FFG900 chip and a communication module, the communication module includes ADG1608, PLX9054 and MAX3490, and the signal multi-channel acquisition module works by using the AD9364 chip to collect wireless signals, and convert the collected analog signals into digital signals, and then transmit them to the XC7Z100-2FFG900 chip through the data bus, and use the XC7Z100-2FFG900 chip to transmit the processed data to the wireless signal interference suppression module of rocket B.

[0017] Preferably, during the simultaneous measurement of rocket A and rocket B, the signal interference suppression module suppresses the interference to rocket B caused by the continuous wave signal transmitted by antenna a to rocket A, and adds antenna c at the midpoint of rocket A and rocket B.

[0018] Preferably, the pulse signal parameters of the opening / closing signal of the antenna c are set as follows:

[0019] Frequency C (center frequency ±1000kHz adjustable); receiving bandwidth BS (BS=f-f0), and |BS|≥2.5MHz; where f represents the frequency range of the pulse signal, and f0 represents the center frequency of the pulse signal;

[0020] Signal power is adjustable within the range of -90dBW≤P≤-30dBW; Modulation pulse: Pulse width: 0.8μs±0.3μs adjustable;

[0021] Leading edge: 0~0.2μs adjustable;

[0022] Trailing edge: 0~0.2μs adjustable.

[0023] The present invention also provides a method for processing a wireless interference signal, comprising the following steps:

[0024] Step S1, adding antenna c at the midpoint of rocket A and rocket B, and setting the receiving state of rocket A and rocket B for a certain continuous wave to a normally open mode;

[0025] Step S2, allowing antenna a and antenna c to transmit signals simultaneously, wherein antenna a transmits a continuous wave signal and antenna c transmits a closed signal;

[0026] Step S3 makes rocket A receive the carrier signal first and then the closing signal; ensure that rocket B receives the closing signal first and then the carrier signal from antenna a arrives; rocket B is controlled by the closing signal and no longer receives the carrier signal from antenna a, thereby suppressing the interference signal.

[0027] Preferably, in step S3, the distance between antenna a and rocket A is set between 1 and 2 meters, and the distance between antenna a and rocket B is greater than 400 meters.

[0028] The present invention also provides a method for processing a wireless interference signal, comprising the following steps:

[0029] Step M1, add antenna c at the midpoint of rocket A and rocket B, and set the receiving state of rocket A and rocket B for a certain continuous wave to normally closed mode;

[0030] Step M2, allowing antenna a and antenna c to send signals simultaneously, wherein antenna a sends an on signal and antenna c sends a continuous wave signal;

[0031] Step M3, let rocket A receive the start signal from antenna a first, and then receive the continuous wave signal from antenna c; ensure that rocket B receives the continuous wave signal from antenna c first, and then receives the start signal from antenna a; when the continuous wave reaches rocket B, rocket B is controlled by the start signal, thereby achieving suppression of the interference signal.

[0032] Preferably, in step M3, the distance between antenna a and rocket A is set between 1 and 2 meters, while antenna a is greater than 400 meters away from rocket B, antenna c is greater than 200 meters away from rocket A, and antenna c is greater than 200 meters away from rocket B.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention effectively solves the problem of continuous wave signal interference during the simultaneous overall test of two launch vehicles by adding antenna c at the midpoint of rocket A and B, and combining two rocket continuous wave interference suppression methods based on antenna specific signal transmission sequence, thereby improving the aerospace test environment and improving the quality and efficiency of test work.

[0035] 2. The signal multi-channel acquisition module of the present invention can accurately convert analog signals into digital signals, providing a basis for subsequent processing. The rocket continuous wave interference suppression method based on the antenna-specific signal transmission sequence of the present invention is set according to different receiving states, and uses the signal of antenna c to control the reception of the interference signal by rocket B, ensuring that rocket B is not affected by the interference signal from antenna a. This method solves the problem of co-frequency interference during parallel testing of multiple models in the same plant, improves test efficiency, reduces erroneous test results caused by interference, provides reliable technical support for aerospace testing, and ensures the smooth progress of rocket testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0037] Figure 1 is a schematic diagram of a wireless interference signal processing system in an embodiment of the present invention;

[0038] Figure 2 Schematic diagram of a signal multi-channel acquisition module based on AD9345 in an embodiment of the present invention;

[0039] Figure 3 Schematic diagram of the geometric position relationship between the antenna and the rocket in the signal interference suppression module in an embodiment of the present invention;

[0040] Figure 4 The figure is a flow chart of a method for processing wireless interference signals in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0042] The present invention aims to solve the problem of a certain continuous wave signal interference existing during the simultaneous overall test of two launch vehicles through an innovative wireless interference signal processing system and method, improve the aerospace test environment, and improve the quality and efficiency of the test work. To this end, a method of adding an antenna at the midpoint of the two rockets is proposed, and two methods of suppressing rocket continuous wave interference based on the antenna specific signal transmission sequence are proposed. The first method: the rocket is initially set to a normally open state, and the newly added antenna transmits a closed signal. Since the interfered rocket receives the closed signal first, the continuous wave interference signal is suppressed. The second method: the rocket is initially set to a closed state, and the newly added antenna transmits a continuous wave signal. The interfered rocket first receives the continuous wave interference signal, and then receives the signal reception start signal, thereby achieving the effect of continuous wave interference suppression.

[0043] Embodiment 1:

[0044] Figure 1 Schematic diagram of a wireless interference signal processing system in an embodiment of the present invention.

[0045] like Figure 1 As shown, this embodiment provides a wireless interference signal processing system, including:

[0046] The signal multi-channel acquisition module is used to convert the analog signal in the wireless signal into a digital signal that can be processed. The signal multi-channel acquisition module includes multiple chips and communication modules.

[0047] Figure 2 Schematic diagram of a signal multi-channel acquisition module based on AD9345 in an embodiment of the present invention.

[0048] like Figure 2 As shown, in this embodiment, the signal multi-channel acquisition module includes 4 AD9364 signal acquisition chips, 1 XC7Z100-2FFG900 chip and a communication module. The communication module includes ADG1608, PLX9054 and MAX3490. The signal multi-channel acquisition module works by using the AD9364 chip to collect wireless signals, and converting the collected analog signals into digital signals, and then transmitting them to the XC7Z100-2FFG900 chip through the data bus, and using the XC7Z100-2FFG900 chip to transmit the processed data to the wireless signal interference suppression module of rocket B.

[0049] The signal interference suppression module adopts the method of adding an antenna at the midpoint of the two rockets. Different signals are transmitted by cooperating with the source antenna that transmits the interference signal. At the same time, different receiving states of the two rockets are set. The rocket continuous wave interference suppression method based on the antenna-specific signal transmission sequence is used to convert the interfered digital signal into an interference-free digital signal.

[0050] Figure 3 Schematic diagram of the geometric position relationship between the antenna and the rocket in the signal interference suppression module in an embodiment of the present invention.

[0051] like Figure 3 As shown, in this embodiment, during the simultaneous measurement of rocket A and rocket B, the signal interference suppression module suppresses the interference caused by the continuous wave signal transmitted by antenna a to rocket A to rocket B. Antenna c is added at the midpoint of rocket A and rocket B, and the signal transmitted by antenna c is used as the reference signal for the received signal of rocket A and B. The pulse signal parameters of the opening / closing signal of antenna c are set as follows:

[0052] a) Frequency C (center frequency ±1000kHz adjustable);

[0053] b) The receiving bandwidth is BS (BS = f - f0), and |BS| ≥ 2.5 MHz;

[0054] Among them, f represents the frequency range of the pulse signal, and f0 represents the center frequency of the pulse signal;

[0055] c) Signal power is adjustable within the range of -90dBW≤P≤-30dBW;

[0056] d) Modulation pulse:

[0057] Pulse width: 0.8μs±0.3μs adjustable;

[0058] Leading edge: 0~0.2μs adjustable;

[0059] Trailing edge: 0~0.2μs adjustable.

[0060] The signal interference suppression module uses one of the following rocket continuous wave interference suppression methods based on the antenna-specific signal transmission sequence to convert the interfered digital signal into an interference-free digital signal:

[0061] The first method of suppressing rocket continuous wave interference based on the antenna specific signal transmission sequence is: set the receiving state of rocket A and rocket B for a certain continuous wave to the normally open mode, antenna a and antenna c transmit signals at the same time, where antenna c sends a closed signal and antenna a sends a continuous wave signal, such as Figure 3 As shown in (b), since the distance between antenna a and rocket A is between 1 and 2 meters, and the distance between antenna a and rocket B is greater than 400 meters, rocket A receives the carrier signal first and then the closing signal; rocket B receives the closing signal from antenna c first, and then the carrier signal from antenna a arrives. Therefore, rocket B is controlled by the closing signal and no longer receives the carrier signal from antenna a, thereby suppressing this interference signal.

[0062] The second method of suppressing rocket continuous wave interference based on the antenna specific signal transmission sequence is: set the receiving state of rocket A and rocket B for a certain continuous wave to the normally closed mode, and antenna a and antenna c send signals at the same time, where antenna a sends an open signal and antenna c sends a continuous wave signal, such as Figure 3 As shown in (b), since the distance between rocket A and antenna a is between 1 and 2 meters, and the distance between rocket A and antenna c is greater than 200 meters, rocket A first receives the start signal from antenna a, and then receives the continuous wave signal from antenna c; for rocket B, antenna a is greater than 400 meters away from rocket B, and antenna c is greater than 200 meters away from rocket B, so the continuous wave signal from antenna c reaches rocket B first, and then the start signal from antenna a reaches rocket B. When the continuous wave signal arrives, rocket B has not yet entered the signal receiving state. Therefore, rocket B effectively suppresses the continuous wave signal from antenna a in this way, and this signal is an interference signal for rocket B.

[0063] The comprehensive testing equipment receives the digital signal processed by the signal interference suppression module and transmits it to the interpretation software for manual interpretation.

[0064] Embodiment 2:

[0065] Figure 4 The figure is a flow chart of a method for processing wireless interference signals in an embodiment of the present invention.

[0066] like Figure 4 As shown, this embodiment provides a wireless interference signal processing method, which suppresses the interference caused by the continuous wave signal transmitted by antenna a to rocket A to rocket B, including the following steps:

[0067] Step S1, adding antenna c at the midpoint of rocket A and rocket B, and setting the receiving state of rocket A and rocket B for a certain continuous wave to a normally open mode;

[0068] Step S2, allowing antenna a and antenna c to transmit signals simultaneously, wherein antenna a transmits a continuous wave signal and antenna c transmits a closed signal;

[0069] Step S3, setting the distance between antenna a and rocket A to between 1 and 2 meters, and the distance between antenna a and rocket B to greater than 400 meters, so that rocket A receives the carrier signal first and then receives the closing signal; ensuring that rocket B receives the closing signal first, and then the carrier signal from antenna a arrives; rocket B is controlled by the closing signal and no longer receives the carrier signal from antenna a, thereby achieving suppression of the interference signal.

[0070] Embodiment 3:

[0071] This embodiment provides a wireless interference signal processing method, which suppresses the interference caused by the continuous wave signal transmitted by antenna a to rocket A to rocket B, including the following steps:

[0072] Step M1, add antenna c at the midpoint of rocket A and rocket B, and set the receiving state of rocket A and rocket B for a certain continuous wave to normally closed mode;

[0073] Step M2, allowing antenna a and antenna c to send signals simultaneously, wherein antenna a sends an on signal and antenna c sends a continuous wave signal;

[0074] Step M3, set the distance between antenna a and rocket A between 1 and 2 meters, and antenna a is greater than 400 meters away from rocket B, antenna c is greater than 200 meters away from rocket A, and antenna c is greater than 200 meters away from rocket B, so that rocket A first receives the start signal from antenna a, and then receives the continuous wave signal from antenna c; ensure that rocket B first receives the continuous wave signal from antenna c, and then receives the start signal from antenna a; when the continuous wave reaches rocket B, rocket B is controlled by the start signal, thereby suppressing the interference signal.

[0075] Those skilled in the art know that, in addition to realizing the system and its various devices, modules, and units provided by the present invention in a purely computer-readable program code, it is entirely possible to realize the same functions in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for realizing various functions can also be regarded as structures within the hardware component; the devices, modules, and units for realizing various functions can also be regarded as both software modules for realizing the method and structures within the hardware component.

[0076] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A wireless interference signal processing method for suppressing interference caused by a continuous wave signal transmitted by antenna a to rocket A to rocket B, characterized in that: The following steps are involved: Step S1, setting the distance between antenna a and rocket A to be between 1 and 2 meters, and the distance between antenna a and rocket B to be greater than 400 meters; adding antenna c at the midpoint of rocket A and rocket B, and setting the receiving state of rocket A and rocket B for a certain continuous wave to a normally open mode; Step S2, allowing antenna a and antenna c to transmit signals simultaneously, wherein antenna a transmits a continuous wave signal, and antenna c transmits a closed signal; Step S3, makes the rocket A receive the carrier signal first, and then receives the closing signal; ensures that the rocket B receives the closing signal first, and then the carrier signal of the antenna a arrives; the rocket B is controlled by the closing signal and no longer receives the carrier signal from the antenna a, thereby achieving the suppression of the interference signal.

2. A method for processing wireless interference signals as claimed in claim 1, characterized in that: The pulse signal parameters of the opening / closing signal of the antenna c are set as follows: a) Frequency C: Center frequency ±1000kHz adjustable; b) Receiving bandwidth BS: BS = f - f0, and |BS| ≥ 2.5 MHz; Among them, f represents the frequency range of the pulse signal, and f0 represents the center frequency of the pulse signal c) Signal power is adjustable within the range of -90dBW≤P≤-30dBW; d) Modulation pulse: Pulse width: 0.8μs±0.3μs adjustable; Leading edge: 0~0.2μs adjustable; Trailing edge: 0~0.2μs adjustable.

3. A wireless interference signal processing method for suppressing interference caused by a continuous wave signal transmitted by antenna a to rocket A to rocket B, characterized in that: The following steps are involved: Step M1, setting the distance between antenna a and rocket A to be between 1 and 2 meters, and antenna a to be greater than 400 meters from rocket B, adding antenna c at the midpoint between rocket A and rocket B, the distance between antenna c and rocket A is greater than 200 meters, the distance between antenna c and rocket B is greater than 200 meters, and setting the receiving state of rocket A and rocket B for a certain continuous wave to a normally closed mode; Step M2, allowing antenna a and antenna c to send signals simultaneously, wherein antenna a sends an on signal and antenna c sends a continuous wave signal; Step M3, let the rocket A first receive the start signal sent by the antenna a, and then receive the continuous wave signal from the antenna c; ensure that the rocket B first receives the continuous wave signal from the antenna c, and then receives the start signal from the antenna a; when the continuous wave reaches the rocket B, the rocket B is controlled by the start signal, thereby achieving suppression of the interference signal.

4. A method for processing wireless interference signals as claimed in claim 3, characterized in that: The pulse signal parameters of the opening / closing signal of the antenna c are set as follows: a) Frequency C: Center frequency ±1000kHz adjustable; b) Receiving bandwidth BS: BS = f - f0, and |BS| ≥ 2.5 MHz; Among them, f represents the frequency range of the pulse signal, and f0 represents the center frequency of the pulse signal c) Signal power is adjustable within the range of -90dBW≤P≤-30dBW; d) Modulation pulse: Pulse width: 0.8μs±0.3μs adjustable; Leading edge: 0~0.2μs adjustable; Trailing edge: 0~0.2μs adjustable.

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