Satellite terminal adaptive power regulation system and method

Abstract

The application discloses a satellite terminal adaptive power regulation system, comprising: an attitude sensor module for collecting three-dimensional attitude data of the terminal; an antenna directional diagram database for storing theoretical gain values of a flat panel omnidirectional antenna under different attitudes; a gain prediction engine for calculating the theoretical gain according to the current attitude data and the directional diagram database; a signal quality detection module for collecting the strength, signal-to-noise ratio and bit error rate of a received signal in real time; a power control algorithm module for fusing the gain prediction value and signal quality feedback to generate a dynamic transmission power instruction; and a radio frequency power amplifier for executing the power regulation instruction and outputting an adjusted transmission signal; the application further discloses a satellite terminal adaptive power regulation method; and the application solves the balance problem between the communication stability and the power consumption efficiency of the satellite terminal under a complex environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of satellite communication, in particular to a satellite terminal adaptive power regulation system and method. BACKGROUND

[0002] The power control scheme of the traditional satellite terminal has the following defects:

[0003] Fixed power mode: Most terminals use fixed transmit power. In a dynamic environment (such as carrier movement and attitude tilt), the signal quality is unstable due to the fluctuation of antenna gain, and the redundant power needs to be increased to compensate for the link loss, resulting in energy waste.

[0004] Mechanical adjustment dependence: Some schemes adjust the antenna pointing through mechanical servo mechanism to optimize the gain, but there are problems such as response delay, bulky size, and complex maintenance, which are difficult to meet the rapid response requirements of lightweight terminals.

[0005] Signal feedback lag: The closed-loop power regulation method based on single received signal or bit error rate is difficult to compensate for the instantaneous gain degradation caused by sudden attitude change in real time due to communication link delay, resulting in the risk of communication interruption.

[0006] The prior art lacks a lightweight and low-delay power regulation mechanism that can combine terminal attitude and real-time signal state, actively predict antenna gain change trend, dynamically optimize transmit power, and reduce system energy consumption while ensuring communication quality. SUMMARY

[0007] To solve the problems in the prior art, the purpose of the present application is to provide a satellite terminal adaptive power regulation system and method. Based on attitude sensing and dynamic signal compensation, the present application realizes intelligent optimization of the directional diagram of the flat omnidirectional antenna and dynamic regulation of the transmit power by fusing attitude sensor data and received signal state analysis, and solves the balance problem of satellite terminal communication stability and power consumption efficiency in complex environment.

[0008] To achieve the above purpose, the technical scheme adopted by the present application is: a satellite terminal adaptive power regulation system, comprising:

[0009] An attitude sensor module for collecting three-dimensional attitude data of the terminal;

[0010] An antenna directional diagram database for storing the theoretical gain values of the flat omnidirectional antenna under different attitudes;

[0011] A gain prediction engine for calculating the theoretical gain according to the current attitude data and the directional diagram database;

[0012] A signal quality detection module for real-time acquisition of the strength, signal-to-noise ratio and bit error rate of the received signal;

[0013] Power control algorithm module: fusing gain prediction value and signal quality feedback, used for generating dynamic transmission power instruction;

[0014] Radio frequency power amplifier: used for executing power adjustment instruction, outputting adjusted transmission signal.

[0015] As a further improvement of the application, the attitude sensor module specifically comprises a gyroscope, an accelerometer and a magnetometer.

[0016] The application further discloses a satellite terminal adaptive power adjustment method, comprising the following steps:

[0017] Step 1, preloading an antenna directional diagram database, configuring an attitude sensor sampling rate, a gain threshold and a PID control parameter;

[0018] Step 2, through real-time matching of the attitude sensor and the antenna directional diagram data, predicting antenna gain reduction caused by attitude tilt or satellite angle deviation, actively adjusting transmission power to fill the gain gap and maintaining link stability;

[0019] Step 3, according to current communication quality requirement and antenna directional diagram gain relative value, calculating the lowest necessary transmission power to reduce the average power consumption of the whole machine.

[0020] As a further improvement of the application, the step 2 specifically comprises the following steps:

[0021] Collecting current attitude angle and signal quality parameters;

[0022] Through coordinate transformation, calculating the azimuth angle (a', b') of the actual pointing direction of the antenna to the satellite;

[0023] Querying the directional diagram database to obtain the theoretical gain , and calculating the theoretical gain loss amount AG = - .

[0024] If AG > 0, starting feedforward compensation to calculate the power compensation amount , otherwise keeping the current power, wherein:

[0025]

[0026] In the formula, Pmax is the maximum allowed compensation power.

[0027] As a further improvement of the application, the step 3 specifically comprises the following steps:

[0028] According to real-time signal quality and target quality ​​The difference between the two values is dynamically adjusted by a PID controller :

[0029]

[0030] wherein, , is a PID control coefficient;

[0031] The comprehensive power compensation amount and the dynamically adjusted compensation amount generates the final transmission power and issues it to the radio frequency power amplifier for execution, wherein:

[0032]

[0033] wherein, is the minimum base power to maintain the link.

[0034] As a further improvement of the present application, if the posture is detected to be stable and the communication quality is up to standard, a low-power mode is activated to gradually reduce the minimum base power .

[0035] As a further improvement of the present application, the azimuth (α', β') of the actual pointing of the antenna to the satellite is calculated by coordinate transformation, specifically as follows

[0036]

[0037] wherein, and are the posture angles.

[0038] In the present application, the antenna pattern is dynamically modeled: based on the three-dimensional posture data of the terminal collected by the attitude sensor (gyroscope, accelerometer, magnetometer), the theoretical gain value of the antenna to the satellite direction under the current posture is generated in real time in combination with the preset parameters of the flat omnidirectional antenna pattern (such as the relative gain table of the radiation pattern); a “posture-gain” mapping database is established to support the quick calculation of the expected antenna gain at any posture angle by an interpolation algorithm.

[0039] Dual-mode feedback regulation mechanism:

[0040] Feedforward control: the antenna gain change is predicted according to the real-time posture data, and the transmission power is pre-adjusted to offset the gain loss.

[0041] Feedback control: the received signal quality index is monitored, and the feedforward compensation amount is dynamically calibrated to eliminate the influence of model errors and environmental disturbances.

[0042] Adaptive power algorithm: Define power adjustment threshold interval, start power compensation when predicted gain drops below preset threshold; dynamically adjust compensation amplitude combined with current channel quality demand to avoid excessive power increase; introduce historical attitude change rate analysis to predict future gain trend and achieve smooth transition of power adjustment.

[0043] Low-power trigger logic: In stable satellite state (attitude change rate below threshold and signal quality meets standards), gradually reduce transmission power to the minimum level to maintain the link and prolong the device's endurance time.

[0044] The beneficial effects of the present application are:

[0045] 1. Improved communication stability: Through the dual compensation mechanism of attitude feedforward and signal feedback, the link interruption probability in dynamic environment is greatly reduced.

[0046] 2. Significant power consumption optimization: Compared with traditional fixed power mode, the average power consumption of the whole machine is reduced by 30%-50%, especially suitable for solar-powered or battery-limited satellite terminals.

[0047] 3. Hardware cost saving: No mechanical servo mechanism is needed to achieve equivalent antenna pointing optimization, reducing terminal volume and manufacturing cost.

[0048] 4. Enhanced environmental adaptability: Suitable for mobile platforms such as vehicles, ships, and drones, and still maintains stable communication in severe attitude change scenarios.

[0049] 5. Lightweight algorithm: Low computational resource occupancy, can be embedded in low-power terminal chipsets for real-time control. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The system architecture diagram of the embodiments of the present application. DETAILED DESCRIPTION

[0051] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0052] Embodiments

[0053] As shown in the figure, a satellite terminal adaptive power adjustment system includes: Figure 1

[0054] Attitude sensor module: contains gyroscope, accelerometer, magnetometer, outputs three-dimensional attitude angle;

[0055] Antenna pattern database: stores theoretical gain values of flat panel omnidirectional antenna at different attitudes;

[0056] Gain prediction engine: calculates theoretical gain according to current attitude data and pattern database; ​

[0057] Signal quality detection module: Real-time acquisition of received signal strength, signal-to-noise ratio, and bit error rate;

[0058] Power control algorithm: Fuse gain prediction and signal quality feedback to generate dynamic transmit power command;

[0059] RF power amplifier: executes power adjustment commands and outputs the adjusted transmit signal.

[0060] This embodiment also provides a satellite terminal adaptive power adjustment method, including:

[0061] Dynamic gain compensation: By matching attitude sensor data with antenna pattern data in real time, it predicts the decrease in antenna gain caused by attitude tilt or star angle deviation, actively adjusts the transmit power to fill the gain gap, and maintains link stability.

[0062] Power consumption optimization: Calculate the minimum necessary transmit power based on the current communication quality requirements (such as the signal bit error rate threshold) and the relative value of the antenna pattern gain, thereby reducing the average power consumption of the whole device.

[0063] Omnidirectional antenna performance improvement: Without relying on mechanical steering devices, algorithm compensation is used to improve the equivalent gain flatness of the planar omnidirectional antenna in dynamic scenarios.

[0064] The method of this embodiment will be further described below:

[0065] 1. Initialization Phase: Preload the antenna pattern database and configure the attitude sensor sampling rate and gain threshold. PID control parameters;

[0066] 2. Real-time adjustment phase (executed cyclically):

[0067] ① Collect the current attitude angle and signal quality parameters.

[0068] ② Calculate the actual azimuth angle (α', β') of the antenna pointing towards the satellite through coordinate transformation:

[0069]

[0070] In the formula, and The attitude angle is denoted as .

[0071] ③ Query the direction map database to obtain And calculate the theoretical gain loss ΔG = (Gain threshold) - (Theoretical gain).

[0072] ④ If ΔG > 0, start feedforward compensation calculation. The power compensation amount); otherwise, maintaining the current power, wherein:

[0073]

[0074] In the formula, is the maximum allowed compensation power.

[0075] ⑤According to the difference between the real-time signal quality Q and the target quality, the PID controller calculates the dynamic adjustment compensation amount:

[0076]

[0077] In the formula, , is the PID control coefficient.

[0078] ⑥The final transmission power is generated by comprehensively considering the power compensation amount and the dynamic adjustment compensation amount, and is sent to the radio frequency power amplifier for execution, wherein:

[0079]

[0080] In the formula, is the minimum basic power to maintain the link.

[0081] ⑦If the posture is stable and the communication quality meets the standard, the low-power mode is activated, and the minimum basic power is gradually reduced.

[0082] The embodiment is characterized in that: 1. Dynamic modeling of antenna pattern: based on the three-dimensional posture data of the terminal collected by the posture sensor (gyroscope, accelerometer, magnetometer), combined with the preset parameters of the omnidirectional antenna pattern of the tablet (such as the relative gain table of the radiation pattern), the theoretical gain value of the antenna to the satellite direction under the current posture is generated in real time; a "posture-gain" mapping database is established to support the quick calculation of the expected antenna gain of any posture angle through the interpolation algorithm.

[0083] 2. Dual-mode feedback adjustment mechanism: feedforward control: predicting the change of antenna gain according to real-time posture data, pre-adjusting the transmission power to offset the gain loss; feedback control: monitoring the received signal quality index, dynamically calibrating the feedforward compensation amount, and eliminating the influence of model error and environmental interference.

[0084] ​​​​​​3. Adaptive power algorithm: define the power adjustment threshold interval, when the predicted gain decreases more than the preset threshold, start power compensation; dynamically adjust the compensation amplitude combined with the current channel quality demand to avoid excessive power increase; introduce historical attitude change rate analysis to predict future gain trend and realize smooth transition of power adjustment.

[0085] 4. Low-power trigger logic: in the stable state of pointing to the satellite (the attitude change rate is lower than the threshold and the signal quality meets the standard), gradually reduce the transmission power to the minimum level to maintain the link and prolong the endurance time of the device.

[0086] The above-described embodiments only express the specific implementation of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A method for adaptive power regulation of a satellite terminal, characterized by, The method comprises the following steps: Step 1, pre-load antenna pattern database, configure attitude sensor sampling rate, gain threshold PID control parameters; Step 2, predicting the antenna gain reduction caused by the attitude tilt or the deviation of the star angle through real-time matching of the attitude sensor and the antenna pattern data, actively adjusting the transmission power to fill the gain gap, and maintaining the link stability; The step 2 is specifically as follows: Collecting the current attitude angle and the signal quality parameter; Calculating the azimuth angle (α', β') of the antenna actually pointing to the satellite through coordinate transformation; Query the directivity pattern database for the theoretical gain and calculate the theoretical gain loss amount AG = - ; If ΔG > 0, start feedforward compensation calculation power compensation amount , otherwise keep current power, wherein: ； In the formula, Pmax is the maximum allowed compensation power; Step 3, calculating the minimum necessary transmission power according to the current communication quality requirement and the relative value of the antenna pattern gain, and reducing the average power consumption of the whole machine.

2. The method of claim 1, wherein, The step 3 is specifically as follows: According to real-time signal quality Difference with target quality , dynamic adjustment compensation is calculated by PID controller : ； In the formula, , PID control coefficient; Integrated power compensation amount With dynamic adjustment of compensation amount Generating final transmit power And issued to the radio frequency power amplifier for execution, wherein: ； In the formula, To maintain the minimum base power of the link.

3. The method of claim 2, wherein, If the posture is detected to be stable and the communication quality is up to the standard, a low-power mode is activated, and the minimum basic power is gradually reduced .

4. The method of claim 3, wherein, The coordinate transformation for calculating the azimuth angle (α', β') of the antenna actually pointing to the satellite is specifically as follows ； wherein and is the attitude angle.

5. A satellite terminal adaptive power regulation system, characterized by, The system for realizing the adaptive power adjustment method of the satellite terminal according to any one of claims 1-4 comprises: An attitude sensor module for collecting three-dimensional attitude data of the terminal; An antenna pattern database for storing the theoretical gain value of the flat panel omnidirectional antenna under different attitudes; A gain prediction engine for calculating the theoretical gain value according to the current attitude data and the pattern database; A signal quality detection module for collecting the strength, signal-to-noise ratio and bit error rate of the received signal in real time; A power control algorithm module for generating dynamic transmission power instructions by fusing the theoretical gain value and the signal quality feedback; A radio frequency power amplifier for executing the power adjustment instructions and outputting the adjusted transmission signal.

6. The satellite terminal adaptive power regulation system of claim 5, wherein, The attitude sensor module specifically comprises a gyroscope, an accelerometer and a magnetometer.

Images