A performance evaluation method for long-distance space reflection communication systems

Abstract

The present invention proposes a performance evaluation method for a long-distance space reflection communication system. The reflection communication system includes a transmitter, a receiver, and a reflector. The transmitter is configured to emit a transmission signal, the reflector is configured to reflect the transmission signal to obtain a reflection signal, and the receiver is configured to receive the reflection signal. The method comprises obtaining device parameters of the reflection communication system and position information of the transmitter, receiver, and reflector; calculating a basic reflection communication link budget for the reflection communication system based on a bistatic radar equation; calculating a beam pattern based on the device parameters, and calculating a correction coefficient based on the beam pattern and position information; and using the correction coefficient to correct the basic reflection communication link budget to obtain a corrected reflection communication link budget value, thereby achieving 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 communications face the problem of line-of-sight path obstruction caused by the Earth's curvature. Since electromagnetic waves propagate in straight lines, as communication distance increases, the Earth's surface blocks the signal, placing the receiver in the "shadow zone" of the transmitter, hindering normal communication and limiting the communication distance. To address this, reflective communication can be achieved by utilizing reflectors in the environment. For example, Earth-Moon-Earth communication uses electromagnetic wave signals reflected by the moon 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 mode of reflection propagation is quite different from that of ordinary direct propagation, the composition and performance evaluation of the reflection communication system are different from those of the direct system. Therefore, the performance evaluation method of the direct communication system is inaccurate.

[0004] On the one hand, reflection communication systems typically use propagation loss formulas to estimate reflection link performance. Signal reflection loss is treated as insertion loss due to reflection. This insertion loss is calculated by measuring the path loss at the transceiver and subtracting it from the propagation loss formula. This method requires actual measurements to calculate the insertion loss of the reflector, which is then used as a reference for system evaluation. This makes performance evaluation cumbersome and inaccurate. On the other hand, because the signal link budget in reflection communication is significantly larger than that in direct communication, long-distance reflection communication typically requires the use of large-aperture, high-gain antennas at the transceiver to achieve sufficient beam gain. However, large-aperture antennas have a narrow mainlobe beamwidth. When the reflector's field-of-view angle is comparable to or greater than the antenna's mainlobe beamwidth, the antenna's spatial gain (i.e., antenna pattern gain) is extremely unevenly distributed within the reflector area, leading to inaccurate reflection communication performance evaluations. This impacts the design specifications and, consequently, 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 object 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 objectives, the first aspect of the present invention provides a performance evaluation method for a long-distance space reflection communication system. The reflection communication system includes a transmitter, a receiver, and a reflector. The transmitter is configured to transmit a transmission signal, the reflector is configured to reflect the transmission signal to obtain a reflection signal, and the receiver is configured to receive the reflection signal. The performance evaluation method includes:

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

[0012] Calculating a basic link budget for reflection communication of the reflection communication system according to a 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 type 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 calculating 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 bistatic reflector 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 objectives, a second aspect of the present invention provides a performance evaluation system for 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 transmit a transmission signal. The reflector is used to reflect the transmission signal to obtain a reflected signal. The receiving end is used to receive the reflected signal. The performance evaluation system includes:

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

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

[0022] a correction coefficient calculation module, configured 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 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 the 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 direction 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 direction 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 reflection communication basic link budget 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 between the transmitting end and the receiving end and the reflector, and the dual-station 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 present invention provides a performance evaluation method, system, electronic device, and storage medium for a long-distance space reflection communication system. The method obtains device parameters of the reflection communication system, as well as position information of a transmitter, a receiver, and a reflector; calculates a basic reflection communication link budget of the reflection communication system according to a bistatic radar equation; calculates a beam pattern based on the device parameters, and calculates a correction coefficient based on the beam pattern and position information; and uses the correction coefficient to correct the basic reflection communication link budget to obtain a correction value for the reflection communication link budget, thereby achieving link performance evaluation. In this case, the beam pattern is calculated using the device parameters, the correction coefficient is calculated based on the beam pattern and position information, and the correction coefficient is used to correct the basic reflection communication link budget to obtain a correction value for the reflection communication link budget. This corrects the influence of the beam pattern on the reflection communication link, thereby making the reflection communication link budget more accurate and more accurately evaluating the performance of the reflection communication system, thereby resolving the problem of inaccurate performance evaluation of long-distance reflection communication systems.

[0029] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may 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 readily 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 the transmitter and receiver provided in an embodiment of the present invention;

[0033] Figure 3 A flowchart of the reflection communication system provided in 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 graph showing a modified link budget curve for lunar reflection communication provided by an embodiment of the present invention;

[0038] Figure 8 This is 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] The following describes embodiments of the present invention in detail, 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 are not to 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, a long-distance space reflection communication system may be referred to as a reflection communication system. The reflection communication system includes a transmitter, a receiver, and a reflector. The transmitter is configured to transmit a transmission signal, the reflector is configured to reflect the transmission signal to generate a reflected signal, and the receiver is configured to receive the reflected signal. The transmitter includes a transmitting antenna, and the receiver 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 transmitter and receiver 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 reflected signal, and a reflection target A (also called a reflector) that reflects the transmission signal to obtain a reflected signal. In this scenario, Ψ 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 tΨ represents 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 boresight of the transmitting antenna and a point a within the region 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 receiving 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 bistatic 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 or natural object in near-Earth space with good electromagnetic reflection properties.

[0045] Figure 3 FIG. 1 is a flowchart of the 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 is completed.

[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 link establishment within the window period: Within the predicted communication window, the transmitter sends a probe frame. The receiver receives and processes the probe signal and then sends a feedback signal. The transmitter and receiver perform beam tracking based on 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] A key process in the operation of a reflection communication system is the reflection of the signal from the transmitter off a reflector before being received by the receiver. For a reflection communication system, when the reflector's field of view angle is comparable to or greater than the antenna's mainlobe beamwidth, the antenna's spatial gain (i.e., antenna pattern gain) is extremely unevenly distributed within the reflector region. This can lead to inaccurate estimates of the reflection communication link budget based on the bistatic radar equation, affecting the reflection communication system's design specifications (such as the communication frequency band, antenna size / gain, and transmit power), and thus, its performance.

[0050] To more accurately assess link performance and determine the communication window during 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. This performance evaluation method is based on a bistatic radar equation and antenna beam pattern to evaluate the link budget for a reflection communication system. This method can address the issue of inaccurate performance evaluation for long-distance reflection communication systems.

[0051] Figure 4 A schematic flow chart of a performance evaluation method for a long-distance space reflection communication system provided by 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 position information of the transmitting end, the receiving end, and the reflector.

[0054] In step S101, the device parameters include the type and design parameters of the transmitting and receiving antennas. The acquired parameter information also includes the angular parameters (typically azimuth and elevation) of the transmitting and receiving antennas, as well as the relative angle between the axial direction of the transmitting and receiving antennas and a point a within the reflector area.

[0055] Step S102 : calculating the 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 bistatic 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 bistatic reflector at a fixed angle, the basic link budget of reflection communication of the reflection communication system is calculated according to the bistatic 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, for example, a common wide-beam antenna.

[0060] Step S103: Calculate the beam pattern based on the device parameters, and calculate 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 type 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 coefficient 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 within 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 within the target area, is the maximum main lobe gain of the receiving antenna.

[0065] Step S104 , correcting the basic link budget of the reflection communication using the correction coefficient to obtain a correction value of the reflection communication link budget, 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; 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.

[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 This is 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. Figure 5 As shown in Figure 2, the performance evaluation method specifically includes:

[0071] Step 1): Calculate the basic link budget of reflection communication according to the bistatic 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 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, J1 is the 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 ability to flexibly change beam gain and beam direction, and its beam pattern can be calculated based on its parameter type (e.g., array size, design frequency band, etc.) and theoretical formulas. The transmit and receive antenna beam patterns include, but are 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 based on the position of the transceiver end of the reflection communication system and the position of the reflector;

[0081] Specifically, according to the position of the transmitter and receiver of the reflection communication system, the position of the reflector, and the scale of the reflection communication system, a suitable coordinate system is selected to determine the angular parameters of the transmitter and receiver and the reflector. The transmitter and receiver positions refer to the position information of the transmitter and 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 at the reflector, and the angular parameters including Ψ are obtained. t and Ψ 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 based on 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 using 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. It 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): Modify the basic link budget to obtain the reflected communication modified 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 a reflection communication corrected link budget or a reflection communication link budget correction value). The logarithm of the correction coefficient η is taken to obtain the logarithmic form of the correction coefficient η, which is denoted as L η . Corrected link budget L cal The calculation formula is: L cal =L+L η .

[0090] Figure 6 This is a graph of the link correction coefficient for lunar reflection communication provided by an embodiment of the present invention. Figure 7 This is 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 based on the antenna pattern of the Cassegrain antenna, the distance between the Earth and the Moon, the lunar reflectivity and other parameters, and using the method proposed in the present invention, the performance of the reflection communication system can be better evaluated. 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 met: 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. For this, the method of the present invention can be used for correction. The calculation results of the correction coefficient are 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 using a 15-meter antenna aperture, there is an impact of about 7.5dB in the 10GHz frequency band; in the 20GHz frequency band, there is an impact of about 10.5dB. If these effects are not taken into account, when designing the core parameter indicators of the reflection communication system (such as rate, bit error rate, etc.), it may cause misjudgment, resulting in insufficient link margin of the hardware system. The link budget before and after correction is shown in Figure 2. Figure 7 As shown, for a reflection communication system using a 15-meter antenna aperture (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 embodiment, the present invention also proposes a performance evaluation system for 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 This is 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 obtain the equipment parameters of the reflection communication system, as well as the position information of the transmitter, receiver and reflector;

[0096] A basic budget calculation module 12 is used to calculate the reflection communication basic link budget of the reflection communication system according to the bistatic radar equation;

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

[0098] The correction module 14 is configured to correct the basic link budget of the reflection communication using the correction coefficient to obtain a correction value of the reflection communication link budget, thereby achieving 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 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 type 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 configured 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 aforementioned explanation of the embodiment of the performance evaluation method for a long-distance space reflection communication system is also applicable to the performance evaluation system for a long-distance space reflection communication system of this embodiment, and will not be repeated here.

[0104] In an embodiment of the present invention, link performance evaluation is achieved by obtaining device parameters of a reflection communication system, as well as position information of a transmitter, a receiver, and a reflector; calculating a basic reflection communication link budget for the reflection communication system according to a bistatic radar equation; calculating a beam pattern based on the device parameters, and calculating a correction coefficient based on the beam pattern and position information; and using the correction coefficient to correct the basic reflection communication link budget to obtain a correction value for the reflection communication link budget. In this case, by calculating the beam pattern using the device parameters, calculating the correction coefficient based on the beam pattern and position information, and correcting the basic reflection communication link budget using the correction coefficient to obtain a correction value for the reflection communication link budget, the influence of the beam pattern on the reflection communication link can be corrected, thereby making the reflection communication link budget more accurate and more accurately evaluating the performance of the reflection communication system, thereby resolving the problem of inaccurate performance evaluation of long-distance reflection communication systems.

[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 bistatic 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 position of the transceiver and the reflector of the reflection system and the scale of the reflection system, and determining the angular parameters of the transceiver and the reflector; calculating the correction coefficient according to the beam pattern and the angular 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 it can correct the influence of the beam pattern of the transmitting and receiving antennas on the reflection communication link, so as to accurately evaluate the performance of the reflection communication system and guide system design.

[0106] Based on the bistatic radar equation, the method of the present invention considers and corrects the impact of the transmit and receive antenna beam patterns on the reflection communication link. This method can be used to calculate the link budget of a reflection communication system, correct the impact of the transmit and receive antenna beam patterns on the reflection communication link, and improve the accuracy of reflection communication performance evaluation, thereby accurately guiding the performance evaluation and system design of reflection communication systems. This method has strong guiding value for the design of reflection communication systems, especially those where the field of view angle of the reflector is comparable to or greater than the main lobe beamwidth of the antenna. It can be used to evaluate the corrected link budget of a reflection communication system, thereby better designing 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 provides 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 in 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 in the above embodiments when executed by a processor.

[0110] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 expressions 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 different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0111] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise 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 be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0113] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, 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 it in another suitable manner if necessary, and then storing it in a computer memory.

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

[0115] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0116] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they 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 is understood that the above embodiments are exemplary and are not to be construed as limiting the present invention. Persons skilled in the art may make changes, modifications, substitutions, and variations to 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 transmitter, a receiver, and a reflector. The transmitter is used to send a transmission signal. The reflector is used to reflect the transmission signal to obtain a reflection signal. The receiver is used to receive the reflection signal. The performance evaluation method includes the following steps: Acquiring equipment parameters of the reflection communication system, and position information of the transmitting end, the receiving end, and the reflector; Calculating a basic link budget for reflection communication of the reflection communication system according to a 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 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.

4. The performance evaluation method of a long-distance space reflection communication system according to claim 2, characterized in that: Calculating the reflection communication basic link budget 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 between the transmitting end and the receiving end and 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. The transmitting end is used to send a transmission signal. The reflector is used to reflect the transmission signal to obtain a reflected signal. The receiving end is used to receive the reflected signal. The performance evaluation system includes: A parameter acquisition module, configured to acquire device parameters of the reflection communication system, and position information of the transmitting end, the receiving end, and the reflector; A basic budget calculation module, configured to calculate a basic link budget for reflection communication of the reflection communication system according to a bistatic radar equation; a correction coefficient calculation module, configured 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 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 to: Based on the maximum main lobe gain of the transmitting antenna, the maximum main lobe gain of the receiving antenna, the average distance between the transmitting end and the receiving end and 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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