Performance evaluation method of long-distance space reflection communication system

Abstract

The invention provides a performance evaluation method of a remote space reflection communication system, the reflection communication system comprises a transmitting end, a receiving end and a reflector, the transmitting end is used for transmitting a transmitting signal, the reflector is used for reflecting the transmitting signal to obtain a reflection signal, and the receiving end is used for receiving the reflection signal. The method comprises the following steps: acquiring equipment parameters of a reflection communication system and position information of a transmitting end, a receiving end and a reflector; calculating a reflection communication basic link budget of the reflection communication system according to the double-station radar equation; calculating a beam pattern based on the equipment parameters, and calculating a correction coefficient based on the beam pattern and the position information; and correcting the reflection communication basic link budget by using the correction coefficient to obtain a reflection communication link budget correction value, thereby realizing link performance evaluation.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a performance evaluation method for a long-distance space reflection communication system. Background Art

[0002] Long-distance wireless communication faces the problem of line-of-sight path obstruction caused by the curvature of the earth. Since electromagnetic waves propagate in a straight line, when the communication distance increases, the earth's surface will block the signal, and the receiving end will be in the "shadow area" of the transmitting end, which hinders normal communication and limits the communication distance. In this regard, reflectors in the environment can be used to achieve reflection communication, such as lunar reflection communication (Earth-Moon-Earth communication) that uses the moon to reflect electromagnetic wave signals to achieve long-distance communication.

[0003] In a reflection communication system, an important process is that the signal emitted by the transmitter is reflected by the reflector and then received by the receiver. Since the reflection propagation method is quite different from the ordinary direct propagation, the composition and performance evaluation of the reflection communication system are different from those of the direct system. The performance evaluation method of the direct communication system is inaccurate.

[0004] On the one hand, the reflection communication system usually uses the propagation loss formula to estimate the reflection link performance, in which the loss of signal reflection is regarded as the insertion loss caused by reflection. The calculation of this insertion loss needs to be obtained by measuring the path loss of the transceiver and subtracting it from the propagation loss formula. This method needs to use actual measurement to calculate the insertion loss of the reflector, and then use the insertion loss of the reflector as a reference for system evaluation. The performance evaluation is cumbersome and inaccurate. On the other hand, since the link budget of the signal in reflection communication is much larger than that of direct communication, in long-distance reflection communication, the transceiver usually needs to use a large-aperture high-gain antenna to obtain sufficient beam gain. However, the main lobe beam width of the large-aperture antenna is narrow. When the field-of-view of the reflector is equivalent to the main lobe beam width of the antenna, or greater than the main lobe beam width of the antenna, the spatial gain of the antenna (i.e., the antenna pattern gain) is extremely unevenly distributed in the reflector area, which will lead to inaccurate reflection communication performance evaluation, affecting the design indicators of the reflection communication system, and then affecting the performance of the reflection communication system. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, a first object of the present invention is to propose a performance evaluation method for a long-distance space reflection communication system to solve the problem of inaccurate performance evaluation of the long-distance reflection communication system.

[0007] The second object of the present invention is to provide a performance evaluation system for a long-distance space reflection communication system.

[0008] A third objective of the present invention is to provide an electronic device.

[0009] A fourth object of the present invention is to provide a computer-readable storage medium.

[0010] To achieve the above-mentioned object, the first aspect of the present invention proposes a performance evaluation method for a long-distance space reflection communication system, the reflection communication system comprising a transmitting end, a receiving end and a reflector, the transmitting end is used to send a transmission signal, the reflector is used to reflect the transmission signal to obtain a reflection signal, the receiving end is used to receive the reflection signal, and the performance evaluation method comprises:

[0011] Acquire equipment parameters of the reflection communication system, and location information of the transmitting end, the receiving end, and the reflector;

[0012] Calculating the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation;

[0013] Calculating a beam pattern based on device parameters, and calculating a correction coefficient based on the beam pattern and the position information;

[0014] The correction coefficient is used to correct the reflection communication basic link budget to obtain a reflection communication link budget correction value, thereby achieving link performance evaluation.

[0015] In the method of the first aspect of the present invention, the transmitting end includes a transmitting antenna, the receiving end includes a receiving antenna, and the device parameters include types and design parameters of the transmitting antenna and the receiving antenna.

[0016] In the method of the first aspect of the present invention, the beam pattern is calculated based on the device parameters, and the correction coefficient is calculated based on the beam pattern and the position information, including: calculating the beam pattern according to the types and design parameters of the transmitting antenna and the receiving antenna; determining the angle parameters of the transmitting end and the receiving end according to the position information of the transmitting end and the receiving end; and calculating the correction coefficient based on the beam pattern and the angle parameters.

[0017] In the method of the first aspect of the present invention, the calculation of the basic link budget of the reflection communication of the reflection communication system according to the bistatic radar equation includes: based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distance from the transmitting end and the receiving end to the reflector, and the reflector bistatic at a fixed angle, calculating the basic link budget of the reflection communication of the reflection communication system according to the bistatic radar equation.

[0018] In the method of the first aspect of the present invention, the use of the correction coefficient to correct the reflection communication basic link budget to obtain the reflection communication link budget correction value includes: obtaining the logarithmic form of the correction coefficient; summing the logarithmic form of the correction coefficient with the reflection communication basic link budget to obtain the reflection communication link budget correction value.

[0019] To achieve the above-mentioned object, the second aspect of the present invention proposes a performance evaluation system for a long-distance space reflection communication system, the reflection communication system comprising a transmitting end, a receiving end and a reflector, the transmitting end is used to send a transmission signal, the reflector is used to reflect the transmission signal to obtain a reflection signal, the receiving end is used to receive the reflection signal, and the performance evaluation system comprises:

[0020] A parameter acquisition module, used to acquire the device parameters of the reflection communication system, and the position information of the transmitting end, the receiving end and the reflector;

[0021] A basic budget calculation module, used for calculating the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation;

[0022] A correction coefficient calculation module, used to calculate a beam pattern based on device parameters, and calculate a correction coefficient based on the beam pattern and the position information;

[0023] The correction module is used to correct the reflection communication basic link budget by using the correction coefficient to obtain a reflection communication link budget correction value, thereby realizing link performance evaluation.

[0024] In the system of the second aspect of the present invention, the transmitting end includes a transmitting antenna, the receiving end includes a receiving antenna, the device parameters include types and design parameters of the transmitting antenna and the receiving antenna, and the correction coefficient calculation module is specifically used to: calculate the beam pattern according to the types and design parameters of the transmitting antenna and the receiving antenna; determine the angle parameters of the transmitting end and the receiving end according to the position information of the transmitting end and the receiving end; and calculate the correction coefficient based on the beam pattern and the angle parameters.

[0025] In the system of the second aspect of the present invention, the basic budget calculation module is specifically used to calculate the basic link budget of the reflection communication of the reflection communication system according to the dual-station radar equation based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distance from the transmitting end and the receiving end to the reflector, and the dual-station of the reflector at a fixed angle.

[0026] To achieve the above-mentioned purpose, the third aspect of the present invention proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method proposed in the first aspect of the present invention.

[0027] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the method proposed in the first aspect of the present invention.

[0028] The performance evaluation method, system, electronic device and storage medium of a long-distance space reflection communication system provided by the present invention obtain the equipment parameters of the reflection communication system, as well as the position information of the transmitting end, the receiving end and the reflector; calculate the basic link budget of the reflection communication of the reflection communication system according to the dual-station radar equation; calculate the beam pattern based on the equipment parameters, calculate the correction coefficient based on the beam pattern and the position information; use the correction coefficient to correct the basic link budget of the reflection communication to obtain the correction value of the reflection communication link budget, thereby realizing link performance evaluation. In this case, the beam pattern is calculated by the equipment parameters, the correction coefficient is calculated based on the beam pattern and the position information, and the basic link budget of the reflection communication is corrected by the correction coefficient to obtain the correction value of the reflection communication link budget, thereby correcting the influence of the beam pattern on the reflection communication link, so that the reflection communication link budget is more accurate, the performance of the reflection communication system is more accurately evaluated, and the problem of inaccurate performance evaluation of the long-distance reflection communication system is solved.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A schematic diagram of a reflection communication system provided by an embodiment of the present invention;

[0032] Figure 2 A diagram showing the module composition of a transmitting end and a receiving end provided by an embodiment of the present invention;

[0033] Figure 3 A flowchart of the reflection communication system provided by an embodiment of the present invention;

[0034] Figure 4A schematic flow chart of a performance evaluation method for a long-distance space reflection communication system provided by an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of a specific flow chart of a performance evaluation method for a long-distance space reflection communication system provided by an embodiment of the present invention;

[0036] Figure 6 A graph showing a link correction coefficient for moon reflection communication provided by an embodiment of the present invention;

[0037] Figure 7 A modified link budget curve diagram for lunar reflection communication provided by an embodiment of the present invention;

[0038] Figure 8 A block diagram of a performance evaluation system for a long-distance space reflection communication system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] The performance evaluation method and system of a long-distance space reflection communication system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] In the present invention, the long-distance space reflection communication system may be referred to as the reflection communication system. The reflection communication system includes a transmitting end, a receiving end and a reflector. The transmitting end is used to send a transmission signal, the reflector is used to reflect the transmission signal to obtain a reflection signal, and the receiving end is used to receive the reflection signal. The transmitting end includes a transmitting antenna, and the receiving end includes a receiving antenna.

[0042] Figure 1 A schematic diagram of a reflection communication system provided by an embodiment of the present invention. Figure 2 This is a diagram of the module composition of the transmitting end and the receiving end provided in an embodiment of the present invention.

[0043] like Figure 1 As shown, the reflection communication system includes a transmitting end that sends a transmission signal, a receiving end that receives a reflection signal, and a reflection target A (also called a reflector) that reflects the transmission signal to obtain a reflection signal. t ={θ t ,φ t} represents the angular parameter of the transmitting antenna, where θ t represents the elevation angle of the transmitting antenna, φ trepresents the azimuth of the transmitting antenna. r ={θ r ,φ r} represents the angle parameter of the receiving antenna, θ r represents the elevation angle of the receiving antenna, φ r Indicates the azimuth of the receiving antenna. represents the relative angle between the axial direction (boresight) of the transmitting antenna and a point a in the area of ​​the reflecting target A, where It represents the relative elevation angle between the axial direction of the transmitting antenna and a point a in the area of ​​the reflecting target A. It represents the relative azimuth between the axial direction of the transmitting antenna and a point a within the area of ​​the reflecting target A. It represents the relative angle between the axial direction of the receiving antenna and a point a in the area of ​​the reflecting target A. It represents the relative elevation angle between the axial direction of the receiving antenna and a point a in the area of ​​the reflecting target A. It represents the relative azimuth between the axial direction of the receiving antenna and a point a within the area of ​​the reflecting target A. is the transmitting power of the transmitter, is the received power at the receiving end. The polarization direction of the transmitting antenna is q, and the polarization direction of the receiving antenna is p. is the gain of the transmitting antenna in the direction of a certain point a in the reflection area, is the gain of the receiving antenna in the direction of a certain point a in the reflection area, is the distance from the transmitter to point a, is the distance from the receiving end to point a. It is the dual-station radar cross section (RCS) of a point a in the reflection area.

[0044] In the present invention, both the transmitting end and the receiving end of the reflection communication system include a baseband unit for processing baseband signals, a radio frequency unit for processing radio frequency signals, and an antenna unit for aiming at a reflector and providing gain (see Figure 2 ). The antenna unit at the transmitting end is the transmitting antenna. The antenna unit at the receiving end is the receiving antenna. The reflector can be a man-made object or a natural object that exists in the near-Earth space and has good electromagnetic reflection characteristics.

[0045] Figure 3 FIG. 1 is a flowchart of a reflection communication system provided by an embodiment of the present invention. Figure 3 As shown, the working process of the reflection communication system includes: link performance analysis and communication window prediction; link establishment within the window period; and transmission after link establishment.

[0046] For link performance analysis and communication window prediction: Based on the reflector motion information (such as ephemeris), analyze the relationship between the reflector motion trajectory and the position of the transmitter and receiver, evaluate the link performance through the reflection communication link budget, and determine the communication window to ensure that the reflector always remains within the line of sight of the transmitter and receiver during the entire communication period.

[0047] For establishing a link within the window period: within the predicted communication window, the transmitter sends a detection frame, and the receiver sends a feedback signal after receiving and processing the detection signal. The transmitter and receiver perform beam tracking based on the reflector motion information and signal-to-noise ratio to ensure that the signal remains aligned in physical space.

[0048] For transmission after link establishment is completed: After the link is established, the transmitter sends data and caches it, and retransmits the data based on the feedback from the receiver.

[0049] In the working process of the reflection communication system, an important process is that the signal emitted by the transmitter is reflected by the reflector and then received by the receiver. For the reflection communication system, when the field of view angle of the reflector is equivalent to or greater than the main lobe beam width of the antenna, the spatial gain of the antenna (i.e., the antenna pattern gain) is extremely unevenly distributed in the reflector area, which will lead to inaccurate evaluation of the reflection communication link budget based on the dual-station radar equation, affecting the design indicators of the reflection communication system (such as communication frequency band, antenna size / gain, transmission power, etc.), and further affecting the performance of the reflection communication system.

[0050] In order to more accurately evaluate the link performance and more accurately determine the communication window in the link performance analysis and communication window prediction steps, an embodiment of the present invention provides a performance evaluation method for a long-distance space reflection communication system. The performance evaluation method is a reflection communication system link budget evaluation method based on a dual-station radar equation and an antenna beam pattern, and the problem of inaccurate performance evaluation of a long-distance reflection communication system can be solved by using this method.

[0051] Figure 4 A schematic flow chart of a performance evaluation method for a long-distance space reflection communication system provided in an embodiment of the present invention.

[0052] like Figure 4 As shown, the performance evaluation method of the long-distance space reflection communication system includes the following steps:

[0053] Step S101, obtaining equipment parameters of the reflection communication system, and location information of the transmitting end, the receiving end and the reflector.

[0054] In step S101, the equipment parameters include the types and design parameters of the transmitting antenna and the receiving antenna. The acquired parameter information also includes the angle parameters (generally azimuth and elevation) of the transmitting antenna and the receiving antenna, and the relative angle between the axial direction of the transmitting antenna and the receiving antenna and a certain point a in the reflector area.

[0055] Step S102, calculating the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation.

[0056] In step S102, a basic link budget of reflection communication of the reflection communication system is calculated according to a dual-station radar equation, including: based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distance from the transmitting end and the receiving end to the reflector, and the dual station of the reflector at a fixed angle, the basic link budget of reflection communication of the reflection communication system is calculated according to the dual-station radar equation.

[0057] The calculation formula for the basic link budget of reflection communication is:

[0058]

[0059] Where L is the basic link budget for reflection communication, is the maximum main lobe gain of the transmitting antenna, is the maximum main lobe gain of the receiving antenna, λ is the signal wavelength at the transmitting end, R t is the average distance from the transmitter to the reflector, R r is the average distance from the receiver to the reflector, σ pq is the reflector bistatic RCS at a fixed angle measured by a given wide beam antenna. The given wide beam antenna is, for example, a common wide beam antenna.

[0060] Step S103, calculating the beam pattern based on the device parameters, and calculating the correction coefficient based on the beam pattern and the position information.

[0061] In step S103, the beam pattern is calculated based on the device parameters, and the correction coefficient is calculated based on the beam pattern and the position information, including: calculating the beam pattern according to the types and design parameters of the transmitting antenna and the receiving antenna; determining the angle parameters of the transmitting end and the receiving end according to the position information of the transmitting end and the receiving end; and calculating the correction coefficient based on the beam pattern and the angle parameters.

[0062] The calculation formula of the correction factor is:

[0063]

[0064] Where η is the correction coefficient, the reflecting target (also called reflector) is denoted as A, ∫∫ A (·) is the integral of the area where the reflective target A is located, is the gain of the transmitting antenna in the direction of a certain point a in the reflection area, is the bistatic radar cross section (RCS) of a point a in the reflection area, It represents the relative elevation angle between the axial direction of the transmitting antenna and a point a in the area of ​​the reflecting target A. It represents the relative azimuth between the axial direction of the transmitting antenna and a point a within the area of ​​the reflecting target A. is the gain of the receiving antenna in the direction of a certain point a in the reflection area, It represents the relative elevation angle between the axial direction of the receiving antenna and a point a in the area of ​​the reflecting target A. It represents the relative azimuth between the axial direction of the receiving antenna and a point a within the area of ​​the reflecting target A. is the maximum main lobe gain of the transmitting antenna, is the average bistatic RCS in the target area, is the maximum main lobe gain of the receiving antenna.

[0065] Step S104, using the correction coefficient to correct the reflection communication basic link budget to obtain a reflection communication link budget correction value, thereby achieving link performance evaluation.

[0066] In step S104, the reflection communication basic link budget is corrected using the correction coefficient to obtain a reflection communication link budget correction value, including: obtaining a logarithmic form of the correction coefficient; summing the logarithmic form of the correction coefficient and the reflection communication basic link budget to obtain the reflection communication link budget correction value.

[0067] The calculation formula of the reflective communication link budget correction value is:

[0068] L cal =L+L η

[0069] Among them, L cal is the reflective communication link budget correction value, L η is the logarithmic form of the correction coefficient η.

[0070] In some embodiments, Figure 5 The specific flow chart of the performance evaluation method of the long-distance space reflection communication system provided by the embodiment of the present invention is as follows. Figure 5 As shown, the performance evaluation method specifically includes:

[0071] Step 1): Calculate the basic link budget of reflection communication according to the dual-station radar equation;

[0072] The calculation formula for the basic link budget of reflection communication is:

[0073]

[0074] Step 2): Calculate the transmit and receive antenna beam patterns;

[0075] Specifically, according to the type and design parameters of the antenna unit, the beam patterns of the antenna units (ie, the transmitting and receiving antennas) at the transmitting end and the receiving end are calculated using the antenna pattern calculation formula.

[0076] Taking the Cassegrain antenna as an example, the Cassegrain antenna is a commonly used large-aperture high-gain antenna. The Cassegrain antenna radiation pattern G(θ,φ) can usually be expressed as:

[0077]

[0078] Where θ and φ are the elevation and azimuth angles relative to the antenna axis, respectively, and J 1 is a first-order Bessel function, λ is the signal wavelength, and D is the antenna aperture.

[0079] In some embodiments, the antenna unit includes but is not limited to a servo antenna system, an active phased array system or a reflective phased array system. The antenna unit provides the function of flexibly changing the beam gain and beam direction, and its beam pattern can be calculated according to its parameter type (such as array size, design frequency band, etc.) and theoretical formula. The beam pattern of the transmitting and receiving antenna includes but is not limited to the beam pattern of a Cassegrain antenna with a servo system, the beam pattern of an active phased array antenna or the beam pattern of a reflective phased array antenna.

[0080] Step 3): Determine parameters according to the position of the transceiver end of the reflection communication system and the position of the reflector;

[0081] Specifically, according to the transceiver position of the reflection communication system, the reflector position and the scale of the reflection communication system, a suitable coordinate system is selected to determine the angle parameters of the transceiver and the reflector. The transceiver position refers to the position information of the transmitter and the position information of the receiver. According to the geometric relationship between the positions of the transmitter, the receiver and the reflector, the transmitting antenna and the receiving antenna are pointed to the reflector, and the angle parameters including Ψ are obtained. t and r .

[0082] In some embodiments, for a long-distance reflection communication system, calculation of position information needs to take into account factors such as the curvature of the earth.

[0083] In some embodiments, if the reflector has a stable orbit or track, the required parameters can be pre-calculated based on its orbit or track information.

[0084] Step 4): Calculate the correction coefficient according to the proposed correction formula;

[0085] Specifically, the correction coefficient is calculated according to the beam pattern, the angle parameters between the transceiver and the reflector, and the proposed correction formula. After determining the pointing direction of the transceiver, the correction coefficient can be calculated by the following formula:

[0086]

[0087] in, and are the maximum main lobe gain of the transmitting antenna and the maximum main lobe gain of the receiving antenna, respectively. is the dual-station RCS of a point a in the reflection area. For different reflectors, it is necessary to measure, count and analyze the dual-station RCS of the target to obtain

[0088] Step 5): Correct the basic link budget to obtain the reflected communication corrected link budget.

[0089] Specifically, the basic link budget is corrected using the obtained correction coefficient to obtain a corrected reflection communication link budget result (also called reflection communication correction link budget or reflection communication link budget correction value). Wherein, taking the logarithm of the correction coefficient η, the logarithmic form of the correction coefficient η can be obtained, which is recorded as L η . Corrected link budget L cal The calculation formula is: L cal =L+L η .

[0090] Figure 6 A graph showing a link correction coefficient for moon reflection communication provided by an embodiment of the present invention. Figure 7 A graph of a modified link budget curve for lunar reflection communication provided by an embodiment of the present invention.

[0091] Taking lunar reflection communication as an example, when using a large-aperture Cassegrain antenna for lunar reflection communication, the link budget of lunar reflection communication can be corrected according to the antenna pattern of the Cassegrain antenna, the distance between the earth and the moon, the lunar reflectivity and other parameters, and the method proposed in the present invention, so as to better evaluate the performance of the reflection communication system. When the reflection communication system uses a 15-meter-aperture antenna, if the communication system is designed to operate in the 2GHz-20GHz frequency band, the main lobe beam width of the antenna is about 0.07° to 0.6°, and the field of view angle of the moon as seen from the earth is about 0.5° (slightly different depending on the orbital position of the moon). Therefore, the following conditions are satisfied: the field of view angle of the reflector is equivalent to the main lobe beam width of the antenna, or greater than the main lobe beam width of the antenna. In this regard, the method of the present invention can be used for correction. The calculation result of the correction coefficient is as follows: Figure 6As shown, it can be seen that with the increase of signal frequency and antenna aperture D, the impact caused by the uneven distribution of antenna pattern gain in the reflector area becomes more and more obvious. For a reflection communication system with a 15-meter antenna aperture, there is an impact of about 7.5dB in the 10GHz frequency band and about 10.5dB in the 20GHz frequency band. If these impacts are not considered, when designing the core parameter indicators of the reflection communication system (such as rate, bit error rate, etc.), misjudgment may occur, resulting in insufficient link margin for the hardware system. The link budget before and after correction is shown in Figure 1. Figure 7 As shown, for a reflection communication system using an antenna aperture of 15 meters (ie, D=15), the basic link budget and the revised link budget are calculated according to the method of the present invention.

[0092] In order to implement the above-mentioned embodiment, the present invention also proposes a performance evaluation system of a long-distance space reflection communication system. The reflection communication system includes a transmitting end, a receiving end and a reflector. The transmitting end is used to send a transmission signal, the reflector is used to reflect the transmission signal to obtain a reflection signal, and the receiving end is used to receive the reflection signal.

[0093] Figure 8 A block diagram of a performance evaluation system for a long-distance space reflection communication system provided by an embodiment of the present invention.

[0094] like Figure 8 As shown, the performance evaluation system of the long-distance space reflection communication system includes a parameter acquisition module 11, a basic budget calculation module 12, a correction coefficient calculation module 13 and a correction module 14, wherein:

[0095] The parameter acquisition module 11 is used to acquire the equipment parameters of the reflection communication system, and the position information of the transmitting end, the receiving end and the reflector;

[0096] A basic budget calculation module 12, used for calculating the reflection communication basic link budget of the reflection communication system according to the dual-station radar equation;

[0097] A correction coefficient calculation module 13, used to calculate a beam pattern based on device parameters, and to calculate a correction coefficient based on the beam pattern and position information;

[0098] The correction module 14 is used to correct the basic link budget of the reflection communication by using the correction coefficient to obtain a correction value of the reflection communication link budget, thereby realizing link performance evaluation.

[0099] Furthermore, in a possible implementation manner of the embodiment of the present invention, the transmitting end includes a transmitting antenna, the receiving end includes a receiving antenna, and the device parameters include types and design parameters of the transmitting antenna and the receiving antenna.

[0100] Furthermore, in a possible implementation of an embodiment of the present invention, the basic budget calculation module 12 is specifically used to calculate the basic link budget of the reflection communication of the reflection communication system according to the dual-station radar equation based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distance from the transmitting end and the receiving end to the reflector, and the dual-station of the reflector at a fixed angle.

[0101] Furthermore, in a possible implementation of an embodiment of the present invention, the correction coefficient calculation module 13 is specifically used to: calculate the beam pattern according to the types and design parameters of the transmitting antenna and the receiving antenna; determine the angle parameters of the transmitting end and the receiving end according to the position information of the transmitting end and the receiving end; and calculate the correction coefficient based on the beam pattern and the angle parameters.

[0102] Furthermore, in a possible implementation of the embodiment of the present invention, the correction module 14 is specifically used to: obtain a logarithmic form of the correction coefficient; and sum the logarithmic form of the correction coefficient with the reflection communication basic link budget to obtain a reflection communication link budget correction value.

[0103] It should be noted that the above explanation of the embodiment of the performance evaluation method of the long-distance space reflection communication system is also applicable to the performance evaluation system of the long-distance space reflection communication system of this embodiment, and will not be repeated here.

[0104] In an embodiment of the present invention, by obtaining the equipment parameters of the reflection communication system, as well as the position information of the transmitting end, the receiving end and the reflector; calculating the reflection communication basic link budget of the reflection communication system according to the dual-station radar equation; calculating the beam pattern based on the equipment parameters, calculating the correction coefficient based on the beam pattern and the position information; using the correction coefficient to correct the reflection communication basic link budget to obtain the reflection communication link budget correction value, thereby realizing link performance evaluation. In this case, the beam pattern is calculated by the equipment parameters, the correction coefficient is calculated based on the beam pattern and the position information, and the reflection communication basic link budget is corrected by the correction coefficient to obtain the reflection communication link budget correction value, thereby being able to correct the influence of the beam pattern on the reflection communication link, so that the reflection communication link budget is more accurate, the performance of the reflection communication system is more accurately evaluated, and the problem of inaccurate performance evaluation of the long-distance reflection communication system is solved.

[0105] The method and system of the present invention are used to accurately evaluate the link budget of a reflection communication system. The system includes: a transmitting end for transmitting a signal, a receiving end for receiving a reflected signal, and a reflector for reflecting the signal, wherein the transmitting end and the receiving end are composed of a baseband unit, a radio frequency unit, and an antenna unit. The method includes: calculating the basic link budget of the reflection communication according to the dual-station radar equation, and using the antenna pattern calculation formula to calculate the beam pattern of the antenna unit according to the type and design parameters of the antenna unit; selecting a suitable coordinate system according to the transceiver position of the reflection system, the reflector position, and the scale of the reflection system, and determining the angle parameters of the transceiver and the reflector; calculating the correction coefficient according to the beam pattern and the angle parameters of the transceiver and the reflector and the proposed correction formula; and using the obtained correction coefficient to correct the basic link budget to obtain a corrected reflection communication link budget result. The beneficial effect of the present invention is that the influence of the beam pattern of the transceiver antenna on the reflection communication link can be corrected to accurately evaluate the performance of the reflection communication system and guide the system design.

[0106] The method of the present invention is based on the dual-station radar equation, takes into account and corrects the influence of the beam pattern of the transmitting and receiving antennas on the reflection communication link, can be used to calculate the link budget of the reflection communication system, correct the influence of the beam pattern of the transmitting and receiving antennas on the reflection communication link, improve the accuracy of the reflection communication performance evaluation, and accurately guide the performance evaluation and system design of the reflection communication system. The method has a strong guiding value for the design of the reflection communication system, especially the reflection communication system whose field of view angle of the reflector is equivalent to or greater than the main lobe beam width of the antenna, and can be used to evaluate the corrected link budget of the reflection communication system to better design the core parameter indicators of the reflection communication system.

[0107] In order to implement the above embodiments, the present invention also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0108] In order to implement the above embodiments, the present invention further proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0109] In order to implement the above embodiments, the present invention further provides a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0110] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0111] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0112] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0113] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0114] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0115] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0116] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0117] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A performance evaluation method for a long-distance space reflection communication system, characterized in that: The reflection communication system includes a transmitting end, a receiving end and a reflector, wherein the transmitting end is used to send a transmission signal, the reflector is used to reflect the transmission signal to obtain a reflection signal, and the receiving end is used to receive the reflection signal. The performance evaluation method includes the following steps: Acquire equipment parameters of the reflection communication system, and location information of the transmitting end, the receiving end, and the reflector; Calculating the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation; Calculating a beam pattern based on device parameters, and calculating a correction coefficient based on the beam pattern and the position information; The correction coefficient is used to correct the reflection communication basic link budget to obtain a reflection communication link budget correction value, thereby achieving link performance evaluation.

2. The performance evaluation method of a long-distance space reflection communication system according to claim 1, characterized in that: The transmitting end includes a transmitting antenna, the receiving end includes a receiving antenna, and the device parameters include types and design parameters of the transmitting antenna and the receiving antenna.

3. The performance evaluation method of a long-distance space reflection communication system according to claim 2, characterized in that: The calculating of the beam pattern based on the device parameters, and the calculating of the correction coefficient based on the beam pattern and the position information, include: Calculating a beam pattern according to the types and design parameters of the transmitting antenna and the receiving antenna; Determine angle parameters of the transmitting end and the receiving end according to the position information of the transmitting end and the receiving end; A correction coefficient is calculated based on the beam pattern and the angle parameter.

4. The performance evaluation method of a long-distance space reflection communication system according to claim 2, characterized in that: The calculating the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation comprises: Based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distances from the transmitting end and the receiving end to the reflector, and the reflector dual station at a fixed angle, the reflection communication basic link budget of the reflection communication system is calculated according to the dual station radar equation.

5. The performance evaluation method of a long-distance space reflection communication system according to claim 1, characterized in that: The method of using the correction coefficient to correct the reflection communication basic link budget to obtain a reflection communication link budget correction value includes: obtaining a logarithmic form of the correction coefficient; and summing the logarithmic form of the correction coefficient with the reflection communication basic link budget to obtain the reflection communication link budget correction value.

6. A performance evaluation system for a long-distance space reflection communication system, characterized in that: The reflection communication system includes a transmitting end, a receiving end and a reflector, wherein the transmitting end is used to send a transmission signal, the reflector is used to reflect the transmission signal to obtain a reflection signal, and the receiving end is used to receive the reflection signal. The performance evaluation system includes: A parameter acquisition module, used to acquire the device parameters of the reflection communication system, and the position information of the transmitting end, the receiving end and the reflector; A basic budget calculation module, used for calculating the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation; A correction coefficient calculation module, used to calculate a beam pattern based on device parameters, and calculate a correction coefficient based on the beam pattern and the position information; The correction module is used to correct the reflection communication basic link budget by using the correction coefficient to obtain a reflection communication link budget correction value, thereby realizing link performance evaluation.

7. The performance evaluation system of the long-distance space reflection communication system according to claim 6, characterized in that: The transmitting end includes a transmitting antenna, the receiving end includes a receiving antenna, the device parameters include types and design parameters of the transmitting antenna and the receiving antenna, and the correction coefficient calculation module is specifically used to: Calculating a beam pattern according to the types and design parameters of the transmitting antenna and the receiving antenna; determining angle parameters of the transmitting end and the receiving end according to the position information of the transmitting end and the receiving end; A correction coefficient is calculated based on the beam pattern and the angle parameter.

8. The performance evaluation system of the long-distance space reflection communication system according to claim 7, characterized in that: The basic budget calculation module is specifically used for: Based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distances from the transmitting end and the receiving end to the reflector, and the reflector dual station at a fixed angle, the reflection communication basic link budget of the reflection communication system is calculated according to the dual station radar equation.

9. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 5 when executed by a processor.

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