Positioning information transmission method of anti-interference Beidou positioning base station

Abstract

The invention relates to the technical field of satellite communication, in particular to a positioning information transmission method of an anti-interference Beidou positioning base station, and the method comprises the steps: obtaining a signal transmitted by a user side through an anti-interference base station, transmitting the signal to a master control station, transmitting the signal to a Beidou satellite through the master control station, and carrying out the processing to obtain a navigation message, a navigation message is sent to the user side through the main control station and the anti-interference base station, and the user side carries out positioning calculation by combining with a satellite, so that real-time position updating is realized; in the transmission process, the master control station counts the bit error rate in the navigation message generation process of the Beidou satellite, judges whether the transmission process meets the standard or not based on the bit error rate, and further judges the transmission process in combination with the data integrity on the basis of judgment, or determines the reason for not meeting the standard according to the bit error rate and generates a corresponding instruction. And corresponding parameters are adjusted according to the instruction, so that the bit error rate is reduced, the navigation message generation precision is improved, the information transmission efficiency is improved, and positioning support is provided for operation equipment, inspection personnel and the like.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication technology, and in particular to a positioning information transmission method for an anti-interference Beidou positioning base station. Background Art

[0002] Chinese patent application publication number CN119001776A discloses a multifunctional Beidou communication terminal and method. This technical solution includes a Beidou positioning module, a communication module, a data processing module, a human-computer interaction module, a power management module, an environmental perception module, a security encryption module, and an expansion interface module. By integrating system signals from these modules, positioning accuracy and reliability are improved, reducing positioning errors in complex environments. Channel coding techniques such as low-density parity check codes are also used to enhance data anti-interference capabilities and reduce bit error rates during transmission. Compression algorithms such as discrete cosine transforms are also used to reduce data volume for large-capacity data transmission. However, this technical solution only addresses how to enhance anti-interference capabilities and reduce bit error rates through channel coding techniques. However, existing technologies suffer from the lack of a verification process throughout the transmission process, making it impossible to achieve self-regulation, resulting in low information transmission efficiency. Summary of the Invention

[0003] To this end, the present invention provides a positioning information transmission method of an anti-interference Beidou positioning base station, which is used to solve the problem of low positioning information transmission efficiency of the anti-interference Beidou base station in the prior art during signal transmission.

[0004] To achieve the above object, the present invention provides a method for transmitting positioning information of an anti-interference Beidou positioning base station, comprising:

[0005] Generate and transmit a radio frequency signal containing original data through the user end;

[0006] The radio frequency signal is acquired by an anti-interference base station and pre-processed to obtain a plurality of data packets, and then the plurality of data packets are transmitted and received by a master control station;

[0007] Acquire the data packets transmitted by the master control station through BeiDou satellites and process them to obtain navigation messages, and then send the navigation messages to the corresponding anti-interference base stations through the master control station;

[0008] Obtaining, through the master control station, a bit error rate generated in the process of the Beidou satellite generating the navigation message and the data integrity of each data packet;

[0009] Determining whether the transmission process of the positioning information meets the standard based on the bit error rate, and determining whether the transmission process meets the standard based on the determination result in combination with the data integrity, or determining the reason for non-compliance with the standard according to the bit error rate, and generating a corresponding instruction based on the reason, the instruction being to determine the proportion of low-orbit satellites in the Beidou satellites, or the transmit power of the anti-interference base station, or the sensitivity threshold of the anti-interference base station, or filtering in the preprocessing process;

[0010] The quantity ratio, the transmit power, the sensitivity threshold, or the filtering is adjusted based on the instruction.

[0011] Furthermore, the process of determining whether the transmission process of the positioning information complies with the standard includes:

[0012] Periodically detecting the bit error rate, determining based on a comparison result of the bit error rate with a preset bit error rate, and determining whether the transmission process complies with the standard based on the determination result combined with the data integrity corresponding to each of the data packets;

[0013] When it is determined that the transmission process does not meet the standard, the reason for not meeting the standard is determined according to the difference between the bit error rate and the preset bit error rate.

[0014] Furthermore, the process of determining whether the transmission process meets the standard based on the data integrity corresponding to each data packet includes:

[0015] Obtaining the completeness of each of the data to determine an average completeness;

[0016] Based on the comparison result of the average integrity and the critical average integrity, it is determined whether the proportion of low-orbit satellites in the Beidou satellites will be adjusted.

[0017] Furthermore, the process of adjusting the proportion of the number of low-orbit satellites in the Beidou satellites includes:

[0018] When it is determined that the average completeness is less than or equal to the critical average completeness, determining to adjust the quantity ratio;

[0019] Calculating the difference between the critical average integrity and the average integrity and recording it as the integrity difference;

[0020] generating a corresponding instruction based on a comparison result of the integrity difference with a preset integrity difference to determine increasing the quantity ratio, wherein the increase in the quantity ratio is positively correlated with the integrity difference;

[0021] Among them, the number ratio is the ratio of the number of the low-orbit satellites to the total number of the Beidou satellites used by the anti-interference base station.

[0022] Furthermore, the process of determining the reason for non-compliance with the standard according to the difference between the bit error rate and the preset bit error rate includes:

[0023] Calculating a difference between the bit error rate and the preset bit error rate and recording the difference as a bit rate difference;

[0024] Determining the reason for non-compliance based on a comparison result of the bit rate difference and the critical bit rate difference;

[0025] Determine, based on the cause, a corresponding process according to a transmit-receive strength ratio, or a corresponding process according to a bit rate variance;

[0026] The transmit-receive strength ratio is the ratio of the strength of the received signal to the strength of the transmitted signal of the anti-interference base station, and the code rate variance is determined by performing variance calculation based on each historical bit error rate obtained through detection over several cycles.

[0027] Further, when it is determined that the bit rate difference is less than or equal to the critical bit rate difference, the process of determining corresponding processing according to the transmit-receive strength ratio includes:

[0028] Based on the comparison result of the transmit / receive strength ratio and the critical transmit / receive strength ratio, it is determined whether to increase the transmit power of the anti-interference base station or reduce the sensitivity threshold of the anti-interference base station.

[0029] Further, when it is determined that the transmit-receive strength ratio is less than or equal to the critical transmit-receive strength ratio, determining to increase the transmit power;

[0030] Calculating a difference between the critical transmit / receive strength ratio and the transmit / receive strength ratio and recording the difference as a strength ratio difference;

[0031] Based on the comparison result of the intensity ratio difference and the preset intensity ratio difference, a corresponding instruction is generated to increase the transmission power, and the increase range of the transmission power is positively correlated with the intensity ratio difference.

[0032] Further, when it is determined that the transmit-receive strength ratio is greater than the critical transmit-receive strength ratio, determining to lower the sensitivity threshold;

[0033] A signal-to-noise ratio (SNR) of the anti-interference base station is obtained, and a corresponding instruction is generated based on a comparison result of the SNR with a preset SNR to reduce the sensitivity threshold, wherein the reduction range of the sensitivity threshold is negatively correlated with the SNR.

[0034] Furthermore, when it is determined that the bit rate difference is greater than the critical bit rate difference, the process of determining corresponding processing according to the bit rate variance includes:

[0035] Based on the comparison result of the bit rate variance and the critical bit rate variance, it is determined whether to add the filtering in the preprocessing process.

[0036] Further, when it is determined that the bit rate variance is greater than the critical bit rate variance, determining to add the filtering;

[0037] The signal-to-noise ratio of the anti-interference base station is obtained, and a corresponding instruction is generated based on a comparison result of the signal-to-noise ratio with a preset signal-to-noise ratio to increase the filtering, wherein the increase amplitude of the filtering is negatively correlated with the signal-to-noise ratio.

[0038] Compared with the prior art, the advantageous effect of the positioning information transmission method of the anti-interference Beidou positioning base station of the present invention is that the method obtains the signal transmitted by the user terminal through the anti-interference base station and transmits it to the main control station, which transmits it to the Beidou satellite for processing to obtain a navigation message, and then sends the navigation message to the user terminal through the main control station and the anti-interference base station, and the user terminal performs positioning solution in combination with the satellite to realize real-time position update; during the transmission process, the main control station counts the bit error rate in the process of generating the navigation message by the Beidou satellite, determines whether the transmission process meets the standard based on the bit error rate, and further determines the transmission process based on the judgment and the data integrity, or when it is determined that it does not meet the standard, determines the reason for non-compliance with the standard according to the bit error rate and generates corresponding instructions, adjusts the number ratio, or transmission power, or sensitivity threshold, or filtering according to the instructions, thereby reducing the bit error rate and improving the accuracy of navigation message generation, thereby improving the positioning information transmission efficiency of the anti-interference Beidou base station during signal transmission, thereby providing stable positioning support for operating equipment, inspection personnel, etc. in special environments.

[0039] Furthermore, the present invention is also used to determine whether the transmission process meets the standards based on the comparison between the bit error rate and the preset bit error rate and further combined with the data integrity in each data packet. When it is determined that the transmission process does not meet the standards, the reason for non-compliance with the standards can be determined based on the difference between the bit error rate and the preset bit error rate, so that the bit error rate can be reduced in a targeted manner, thereby improving the transmission efficiency of the positioning information during the transmission process.

[0040] Furthermore, the present invention can also determine the increase in the number ratio based on the comparison result between the average integrity and the critical average integrity when adjusting the number ratio of low-orbit satellites in the Beidou satellite based on the comparison result between the average integrity and the critical average integrity, so as to achieve accurate adjustment of the number ratio, thereby improving the transmission efficiency of positioning information.

[0041] Furthermore, the present invention can also determine the reason for non-compliance with the standard based on the comparison results of the bit error rate difference and the critical bit error rate difference, and based on the reason, can determine the corresponding processing according to the transmit-receive strength ratio or the code rate variance, thereby improving the transmission process and thus improving the transmission efficiency of the positioning information.

[0042] Furthermore, the present invention can also determine whether to increase the transmission power or lower the sensitivity threshold based on the comparison result of the transmit-receive strength ratio with the preset transmit-receive strength ratio when the bit error rate difference is less than or equal to the critical bit error rate difference, thereby reducing the bit error rate and improving the transmission efficiency of the positioning information.

[0043] Furthermore, the present invention can also determine to increase filtering based on the comparison result of the signal-to-noise ratio and the preset signal-to-noise ratio when the bit error rate difference is greater than the critical bit error rate difference, thereby reducing the bit error rate and improving the transmission efficiency of the positioning information. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a module diagram of the positioning information transmission system of the anti-interference Beidou positioning base station in the present invention;

[0045] Figure 2 Schematic diagram of the flow of the positioning information transmission method of the anti-interference Beidou positioning base station in the present invention;

[0046] Figure 3 This is a logic decision diagram for determining whether the transmission process of positioning information complies with the standard and the corresponding processing based on the bit error rate in the present invention;

[0047] Figure 4 This is a logic decision diagram for determining the reasons why the transmission process of positioning information does not meet the standards based on the bit error rate difference and the corresponding processing in the present invention. DETAILED DESCRIPTION

[0048] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0050] It should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] See also Figure 1As shown in FIG, it is a module diagram of the positioning information transmission system of the anti-interference Beidou positioning base station of this embodiment. The system includes a user terminal, an anti-interference base station, a master control station, Beidou satellites, an analysis module, and a control module. The user terminal is used to transmit a radio frequency signal containing raw data; the anti-interference base station is connected to the user terminal to obtain the radio frequency signal and perform preprocessing to obtain a plurality of data packets; the master control station is connected to the anti-interference base station to obtain the plurality of data packets; the Beidou satellite is connected to the master control station to obtain the plurality of data packets and perform preprocessing to obtain navigation messages, and is also used to transmit the navigation messages to the user terminal based on the master control station and the anti-interference base station; the analysis module is connected to the master control station to obtain a bit error rate and data integrity of each data packet, and to determine whether the transmission process of positioning information meets the standard based on the bit error rate, and to determine whether the transmission process meets the standard based on the determination result combined with the data integrity, or to determine the reason for non-compliance with the standard based on the bit error rate, and to generate a corresponding instruction based on the reason, the instruction being to determine the number ratio of low-orbit satellites in the Beidou satellite, the transmission power of the anti-interference base station, the sensitivity threshold of the anti-interference base station, or the filtering in the preprocessing process; the control module is respectively connected to the analysis module, the anti-interference base station, and the Beidou satellite, and is used to adjust the number ratio, the transmission power, the sensitivity threshold, or the filtering based on the instruction.

[0052] See also Figure 2 As shown in FIG, it is a flow chart of the positioning information transmission method of the anti-interference Beidou positioning base station in this embodiment. The process includes at least the following steps:

[0053] S1: Generates and transmits a radio frequency signal containing raw data through the user end;

[0054] S2: The anti-interference base station obtains the radio frequency signal and pre-processes it to obtain a number of data packets, which are then transmitted and received by the master control station;

[0055] S3: Obtain several data packets transmitted by the master control station through the Beidou satellite and process them to obtain navigation messages, and then send the navigation messages to the corresponding anti-interference base station through the master control station;

[0056] S4; obtaining the bit error rate and data integrity of each data packet generated by the Beidou satellite during the generation of the navigation message through the master control station;

[0057] S5: Determine whether the transmission process of the positioning information meets the standards based on the bit error rate, and determine whether the transmission process meets the standards based on the determination result combined with the data integrity, or determine the reason for non-compliance with the standards based on the bit error rate, and generate corresponding instructions based on the reason, the instructions are to determine the proportion of low-orbit satellites in the Beidou satellite system, or the transmission power of the anti-interference base station, or the sensitivity threshold of the anti-interference base station, or the filtering in the preprocessing process;

[0058] S6: Adjust the quantity ratio, or transmit power, or sensitivity threshold, or filter based on the instruction.

[0059] See also Figure 3 As shown, this is a logical determination diagram for determining whether the transmission process of positioning information complies with standards based on the bit error rate and the corresponding processing according to this embodiment. The process of determining whether the transmission process of positioning information complies with standards includes: periodically detecting the bit error rate, determining based on the comparison result of the bit error rate with a preset bit error rate, and determining whether the transmission process complies with standards based on the determination result and the data integrity corresponding to each data packet. If the transmission process is determined to be non-compliant, the reason for the non-compliance is determined based on the difference between the bit error rate and the preset bit error rate.

[0060] Specifically, in this embodiment, by analyzing the historical data collected in the past, and combining statistical methods and application scenarios, the corresponding preset or critical parameter values are determined. In order to more accurately judge the transmission process of the positioning information and refine the corresponding parameters in the transmission process, the preset bit error rate B0 can be divided into a first preset bit error rate B1 and a second preset bit error rate B2. The scenario where the anti-interference base station is applied to transmit positioning information in a tunnel is determined, and B1 is set to 1.2×10 -5 , B2=1.5×10 -5 The comparison process based on the bit error rate B with B1 and B2 is as follows:

[0061] If B is less than or equal to B1, the currently detected bit error rate is within the acceptable bit error rate threshold, and the positioning information transmission process can be directly determined to be compliant. If B is greater than B1 and less than or equal to B2, a further determination is made based on the comparison of B with B1 and B2, combined with the data integrity of each data packet, to avoid reliance on a single metric and improve the accuracy of the determination process. If B is greater than B2, the bit error rate generated during the current transmission process far exceeds the acceptable bit error rate threshold. Therefore, it can be directly determined that the current transmission process does not meet the standards. The cause can be determined by the difference between B and B0, or more specifically, the difference between B and B2.

[0062] Furthermore, the process of determining whether the transmission process complies with the standard based on the data integrity corresponding to each of the data packets includes: obtaining the integrity of each of the data to determine the average integrity; and determining whether to adjust the proportion of the number of low-orbit satellites in the Beidou satellite based on the comparison result of the average integrity and the critical average integrity.

[0063] Specifically, in this embodiment, an average integrity F is obtained based on the data integrity in each data packet. A critical average integrity F0 = 99.97% is determined based on the standards for Beidou satellite communication. The comparison process based on F and F0 is as follows: If F is less than or equal to F0, it indicates that the data integrity in the current transmission process does not meet the standards, and data in the data packet has been lost during the transmission process. Therefore, the transmission process needs to be optimized to improve the integrity of the data packet. By increasing the number of Beidou satellites that are relatively closer to the ground, the data transmission distance is shortened to improve data integrity, thereby reducing the bit error rate. It should be noted that the low-orbit satellites referred to in the present invention refer to the satellites that are closer to the ground among all Beidou satellites and are only applicable to satellites within the Beidou satellite group. If F is greater than F0, it indicates that the data integrity in the current transmission process meets the requirements, and the average integrity is not a key factor affecting the transmission process. Therefore, if B is greater than B1 and less than or equal to B2, it can be directly determined that the transmission process does not meet the standards based on the bit error rate, and the cause can be determined based on the difference between B and B2.

[0064] Furthermore, the process of adjusting the number ratio of low-orbit satellites in the Beidou satellites includes: when it is determined that the average integrity is less than or equal to the critical average integrity, determining to adjust the number ratio; calculating the difference between the critical average integrity and the average integrity and recording it as the integrity difference; generating a corresponding instruction based on the comparison result of the integrity difference and the preset integrity difference to determine to increase the number ratio, and the increase in the number ratio is positively correlated with the integrity difference; wherein, the number ratio is the ratio of the number of the low-orbit satellites to the total number of the Beidou satellites used by the anti-interference base station.

[0065] Specifically, in this embodiment, when determining the need to adjust the quantity ratio, the preset integrity difference D0 can be divided into a first preset integrity D1 and a second preset integrity D2. The integrity difference D is compared with D1 and D2 to accurately determine the increase in the quantity ratio. The number of satellites enabled during the current anti-interference base station positioning information transmission is set to 20, and the number of low-orbit satellites is 2. The quantity ratio is 0.1, and D1 is set to 0.02%, D2 to 0.04%. The specific comparison process based on D with D1 and D2 is: if D is less than or equal to D1, it is determined to generate the corresponding first adjustment quantity ratio instruction to control the satellite. The original number ratio is increased to 0.15; if D is greater than D1 and less than or equal to D2, then the corresponding second adjustment number ratio instruction is generated to control the Beidou satellite to increase the original number ratio to 0.2; if D is greater than D2, then the corresponding third adjustment number ratio instruction is generated to control the Beidou satellite to increase the original number ratio to 0.25; if D is much greater than D2, it is directly determined that the number of satellites used in the current transmission process is insufficient and more satellites need to be activated, or there is a fault problem in the entire transmission process and maintenance is required. It should also be noted that after determining the number ratio, the number of low-orbit satellites is rounded up. It is understandable that the number ratio can also be set to other values. For example, when D is greater than D2, the original number ratio is determined to be increased to 0.3. Moreover, the number ratio needs to be determined in combination with the actual number of low-orbit satellites.

[0066] See also Figure 4 As shown, it is a logical decision diagram for determining the reason why the transmission process of positioning information does not meet the standards based on the bit error rate difference and the corresponding processing according to this embodiment. The process of determining the reason for non-compliance with the standards based on the difference between the bit error rate and the preset bit error rate includes: calculating the difference between the bit error rate and the preset bit error rate and recording it as the bit rate difference; determining the reason for non-compliance with the standards based on the comparison result of the bit rate difference and the critical bit rate difference; determining the corresponding processing based on the cause according to the transmit-receive strength ratio, or determining the corresponding processing based on the bit rate variance; wherein the transmit-receive strength ratio is the ratio of the strength of the received signal to the strength of the transmitted signal of the anti-interference base station, and the bit rate variance is determined by calculating the variance of each historical bit error rate obtained by detection over several periods.

[0067] Specifically, in this embodiment, the critical bit rate difference C0 is set to 0.3×10 -5The specific comparison process based on the code rate difference C and C0 is as follows: if C is less than or equal to C0, it means that C in the current transmission process is quite small, and B does not exceed B2 too much. Therefore, although the bit error rate at this time is unqualified, it is still within an acceptable range, and the impact on the non-compliance of the transmission process with the standard is relatively small. The signal transceiver strength ratio M can be obtained, and the corresponding processing is determined based on the comparison result of the transceiver strength ratio M and the critical transceiver strength ratio M0; if C is greater than C0, it means that the current B exceeds B2 too much. At this time, in order to accurately determine the reason why the bit error rate B under the current cycle detection is relatively large and the reason why the current transmission process does not meet the standard, the various bit error rates B under historical detection can be obtained, and the variance calculation is performed based on the current B and each historical bit error rate B to obtain the code rate variance L. The corresponding processing is determined based on the comparison result of the code rate variance L and the critical code rate variance L0.

[0068] Furthermore, when it is determined that the code rate difference is less than or equal to the critical code rate difference, the process of determining the corresponding processing based on the transceiver strength ratio includes: determining whether to increase the transmission power of the anti-interference base station or lower the sensitivity threshold of the anti-interference base station based on the comparison result of the transceiver strength ratio and the critical transceiver strength ratio.

[0069] Specifically, in this embodiment, the critical transmit / receive strength ratio M0 is set to -20 dB. The comparison process based on the transmit / receive strength ratio H and H0 is as follows: If M is less than or equal to M0, it indicates that the anti-interference base station has experienced signal attenuation when receiving and transmitting signals during the current transmission process. In this case, it can be determined that the transmit power of the anti-interference base station needs to be increased to improve the transmit / receive strength ratio. If M is greater than M0, it indicates that the base station transmit power during the current transmission process is sufficient and there is no signal attenuation. Therefore, it can be determined that the reason the transmission process does not meet the standard is due to an increase in the bit error rate caused by electromagnetic interference. In this case, it can be determined that the sensitivity threshold of the anti-interference base station needs to be lowered to reduce electromagnetic interference and reduce the bit error rate caused by weak signals being misjudged as valid signals. When lowering the sensitivity threshold, care should be taken to avoid excessive reduction, which may cause the bit error rate to increase. It should be noted that in order to accurately determine the corresponding processing, this embodiment only considers the direction of increasing the transmit power based on the determination of signal attenuation, and does not generate other situations by default. Similarly, it only considers the direction of lowering the sensitivity threshold based on the determination of electromagnetic interference, and does not generate other situations by default.

[0070] Furthermore, when it is determined that the transmit-receive strength ratio is less than or equal to the critical transmit-receive strength ratio, it is determined to increase the transmit power; the difference between the critical transmit-receive strength ratio and the transmit-receive strength ratio is calculated and recorded as the strength ratio difference; based on the comparison result of the strength ratio difference and the preset strength ratio difference, a corresponding instruction is generated to increase the transmit power, and the increase in the transmit power is positively correlated with the strength ratio difference.

[0071] Specifically, in this embodiment, the preset intensity ratio difference T0 can be divided into a first preset intensity ratio difference T1 and a second preset intensity ratio difference T2. The intensity ratio difference T is compared with T1 and T2 to accurately determine the increase in transmit power, thereby achieving automatic adjustment and closed-loop control of the base station. Assuming T1 = -3dB and T2 = -6dB, the specific process of comparing T with T1 and T2 is as follows: if T is less than or equal to T1, a corresponding first transmit power adjustment instruction is generated to control the anti-interference base station to increase the original transmit power to 2 times; if T is greater than T1 and less than or equal to T2, a corresponding second transmit power adjustment instruction is generated to control the anti-interference base station to increase the original transmit power to 3 times; if T is greater than T2, a corresponding third transmit power adjustment instruction is generated to control the anti-interference base station to increase the original transmit power to 4 times. In this case, T is not infinite. It should be noted that the increase in transmit power can also be set as a numerical value. For example, when T is less than or equal to T1, the increase ratio is set to 2.5 times.

[0072] Furthermore, when it is determined that the transmit-receive strength ratio is greater than the critical transmit-receive strength ratio, it is determined to lower the sensitivity threshold; the signal-to-noise ratio of the anti-interference base station is obtained, and a corresponding instruction is generated based on a comparison result of the signal-to-noise ratio with a preset signal-to-noise ratio to lower the sensitivity threshold, and the reduction amplitude of the sensitivity threshold is negatively correlated with the signal-to-noise ratio.

[0073] Specifically, in this embodiment, the preset signal-to-noise ratio A0 can be divided into a first preset signal-to-noise ratio A1 and a second preset signal-to-noise ratio A2. The signal-to-noise ratio A is compared with A1 and A2 to accurately determine the reduction in the sensitivity threshold. When H is greater than H0, it indicates that the signal power at the receiving end is strong. At this time, the system can withstand a lower sensitivity threshold. By lowering the sensitivity threshold, the capture capability of weak signals is enhanced to increase the data integrity of the data packet. Assuming A1=30dB and A2=34dB, the specific process based on the comparison of A with A1 and A2 is as follows: if A is less than or equal to A1, a corresponding first sensitivity threshold adjustment instruction is generated to control the anti-interference base station to reduce the sensitivity threshold by 20% based on the original sensitivity threshold; if A is greater than A1 and less than or equal to A2, a corresponding second sensitivity threshold adjustment instruction is generated to control the anti-interference base station to reduce the sensitivity threshold by 14% based on the original sensitivity threshold; if A is greater than A2, a corresponding third sensitivity threshold adjustment instruction is generated to control the anti-interference base station to reduce the sensitivity threshold by 10% based on the original sensitivity threshold. It should be noted that the reduction in the sensitivity threshold can also be set as a numerical value. For example, when A is less than or equal to A1, the reduction is set to 18%. The higher the signal-to-noise ratio, the lower the sensitivity threshold required for the anti-interference base station, and the reduction generally shows a decreasing trend. This is because at high signal-to-noise ratios, the interference of noise on the signal is significantly reduced, and the marginal benefit of further optimizing the sensitivity decreases.

[0074] Furthermore, when it is determined that the bit rate difference is greater than the critical bit rate difference, determining the corresponding processing according to the bit rate variance includes: determining whether to add the filtering in the preprocessing process based on a comparison result of the bit rate variance and the critical bit rate variance.

[0075] Specifically, in this embodiment, a critical bit rate variance L0=0.042 can be set based on historical data. The specific process of comparing the bit rate variance L with L0 is as follows: if L is less than or equal to L0, it is determined that several historical bit error rates are relatively close to the current bit error rate in terms of data, indicating that the vast majority of several historical bit error rates derived from the current unqualified bit error rate are also unqualified. It can be determined that the reason why the transmission process does not meet the standard is that there is an error in the timing, resulting in the bit error rate detected in each cycle being consistent. At this time, the timing error can be updated, and the propagation delay caused by the satellite clock error can be compensated in combination with the differential correction data of the master station (such as RTK technology) to reduce the timing error, thereby reducing the bit error rate; if L is greater than L0, it means that there is a significant difference in the values of several historical bit error rates and the current bit error rate in the time dimension. Therefore, the high bit error rate in the current transmission process is caused by problems in the preprocessing process of the radio frequency signal by the current anti-interference base station. At this time, the filtering in the preprocessing process can be adjusted to reduce the bit error rate.

[0076] Furthermore, when it is determined that the code rate variance is greater than the critical code rate variance, it is determined to increase the filtering; the signal-to-noise ratio of the anti-interference base station is obtained, and a corresponding instruction is generated based on a comparison result of the signal-to-noise ratio with a preset signal-to-noise ratio to increase the filtering, and the increase in the filtering is negatively correlated with the signal-to-noise ratio.

[0077] Specifically, in this embodiment, A1 = 26dB and A2 = 29dB can be set. The specific process of comparing A with A1 and A2 is as follows: if A is less than or equal to A1, a corresponding first adjustment filter instruction is generated to control the anti-interference base station to increase the original filtering by 50%; if A is greater than A1 and less than or equal to A2, a corresponding second adjustment filter instruction is generated to control the anti-interference base station to increase the original filtering by 40%; if A is greater than A2, a corresponding third adjustment filter instruction is generated to control the anti-interference base station to increase the original filtering by 30%. At this time, the maximum value of A shall not exceed 35dB. It should be noted that the increase in filtering can also be set to other values. For example, when A is greater than A2, it is determined that the original filtering is increased by 35%. At this time, it is important to pay attention to the value of the signal-to-noise ratio. If the signal-to-noise ratio is too large, it is necessary to reduce the filtering in a targeted manner. When the signal-to-noise ratio is higher, the noise component in the signal is relatively reduced. At this time, the amplitude adjustment of the filter usually tends to decrease, because a high signal-to-noise ratio means better signal quality. There is no need to suppress noise through large-scale filtering. Excessive filtering may cause signal distortion.

[0078] It is understandable that in the embodiments of the present invention, no specific limitation is imposed on any preset parameter or critical parameter, and the above values are not limited thereto. Those skilled in the art may adjust the preset parameters or critical parameters accordingly based on actual needs, analysis of historical data, or equipment usage.

[0079] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0080] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A positioning information transmission method for an anti-interference Beidou positioning base station, characterized in that: include: Generate and transmit a radio frequency signal containing original data through the user end; The radio frequency signal is acquired by an anti-interference base station and pre-processed to obtain a plurality of data packets, and then the plurality of data packets are transmitted and received by a master control station; Acquire the data packets transmitted by the master control station through BeiDou satellites and process them to obtain navigation messages, and then send the navigation messages to the corresponding anti-interference base stations through the master control station; Obtaining, through the master control station, a bit error rate generated in the process of the Beidou satellite generating the navigation message and the data integrity of each data packet; Determining whether the transmission process of the positioning information meets the standard based on the bit error rate, and determining whether the transmission process meets the standard based on the determination result in combination with the data integrity, or determining the reason for non-compliance with the standard according to the bit error rate, and generating a corresponding instruction based on the reason, the instruction being to determine the proportion of low-orbit satellites in the Beidou satellites, or the transmit power of the anti-interference base station, or the sensitivity threshold of the anti-interference base station, or filtering in the preprocessing process; The quantity ratio, the transmit power, the sensitivity threshold, or the filtering is adjusted based on the instruction.

2. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 1 is characterized in that: The process of determining whether the transmission process of positioning information complies with the standards includes: Periodically detecting the bit error rate, determining based on a comparison result of the bit error rate with a preset bit error rate, and determining whether the transmission process complies with the standard based on the determination result combined with the data integrity corresponding to each of the data packets; When it is determined that the transmission process does not meet the standard, the reason for not meeting the standard is determined according to the difference between the bit error rate and the preset bit error rate.

3. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 2 is characterized in that: The process of determining whether the transmission process meets the standard based on the data integrity corresponding to each data packet includes: Obtaining the completeness of each of the data to determine an average completeness; Based on the comparison result of the average integrity and the critical average integrity, it is determined whether the proportion of low-orbit satellites in the Beidou satellites will be adjusted.

4. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 3 is characterized in that: The process of adjusting the proportion of the number of low-orbit satellites in the Beidou satellites includes: When it is determined that the average completeness is less than or equal to the critical average completeness, determining to adjust the quantity ratio; Calculating the difference between the critical average integrity and the average integrity and recording it as the integrity difference; generating a corresponding instruction based on a comparison result of the integrity difference with a preset integrity difference to determine increasing the quantity ratio, wherein the increase in the quantity ratio is positively correlated with the integrity difference; Among them, the number ratio is the ratio of the number of the low-orbit satellites to the total number of the Beidou satellites used by the anti-interference base station.

5. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 2 is characterized in that: The process of determining the reason for non-compliance with the standard according to the difference between the bit error rate and the preset bit error rate includes: Calculating a difference between the bit error rate and the preset bit error rate and recording the difference as a bit rate difference; Determining the reason for non-compliance based on a comparison result of the bit rate difference and the critical bit rate difference; Determine, based on the cause, a corresponding process according to a transmit-receive strength ratio, or a corresponding process according to a bit rate variance; The transmit-receive strength ratio is the ratio of the strength of the received signal to the strength of the transmitted signal of the anti-interference base station, and the code rate variance is determined by performing variance calculation based on each historical bit error rate obtained through detection over several cycles.

6. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 5 is characterized in that: When it is determined that the bit rate difference is less than or equal to the critical bit rate difference, the process of determining corresponding processing according to the transmit-receive strength ratio includes: Based on the comparison result of the transmit / receive strength ratio and the critical transmit / receive strength ratio, it is determined whether to increase the transmit power of the anti-interference base station or reduce the sensitivity threshold of the anti-interference base station.

7. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 6 is characterized in that: When it is determined that the transmit / receive strength ratio is less than or equal to the critical transmit / receive strength ratio, determining to increase the transmit power; Calculating a difference between the critical transmit / receive strength ratio and the transmit / receive strength ratio and recording the difference as a strength ratio difference; Based on the comparison result of the intensity ratio difference and the preset intensity ratio difference, a corresponding instruction is generated to increase the transmission power, and the increase range of the transmission power is positively correlated with the intensity ratio difference.

8. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 6 is characterized in that: When it is determined that the transmit / receive strength ratio is greater than the critical transmit / receive strength ratio, determining to lower the sensitivity threshold; A signal-to-noise ratio (SNR) of the anti-interference base station is obtained, and a corresponding instruction is generated based on a comparison result of the SNR with a preset SNR to reduce the sensitivity threshold, wherein the reduction range of the sensitivity threshold is negatively correlated with the SNR.

9. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 5, characterized in that: When it is determined that the bit rate difference is greater than the critical bit rate difference, the process of determining corresponding processing according to the bit rate variance includes: Based on the comparison result of the bit rate variance and the critical bit rate variance, it is determined whether to add the filtering in the preprocessing process.

10. The positioning information transmission method of the anti-interference Beidou positioning base station according to claim 9, characterized in that: When it is determined that the bit rate variance is greater than the critical bit rate variance, determining to add the filtering; The signal-to-noise ratio of the anti-interference base station is obtained, and a corresponding instruction is generated based on a comparison result of the signal-to-noise ratio with a preset signal-to-noise ratio to increase the filtering, wherein the increase amplitude of the filtering is negatively correlated with the signal-to-noise ratio.

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