Microwave power control method and system combining binary search with feedback regulation

Abstract

The present application relates to a kind of binary search and feedback regulation combined microwave power control method and system, belong to microwave system output power regulation technical field, solve the problem of inaccurate existing power regulation in prior art, the power fluctuation of after regulation is larger. Including: the binary search of power regulation factor based on target power value and the current power value reported by power amplifier is carried out, generates first power regulation factor and issues to baseband signal module, until the difference of current power value reported and target power value meets error range;Power amplifier amplifies each first baseband signal and reports current power value to monitoring module, when the difference of current power value reported and target power value exceeds error range, generates second power regulation factor and issues to baseband signal module;Baseband signal module generates corresponding second baseband signal based on second power regulation factor;Power amplifier amplifies second baseband signal. Realize the accurate control of microwave system power.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of microwave system output power adjustment, in particular to a microwave power control method and system combining dichotomy and feedback adjustment. BACKGROUND

[0002] In the use of microwave systems, in order to achieve different transmission powers required by users, the traditional method is to set the attenuation value of the power amplifier to achieve it. However, due to the influence of temperature, thermal performance of components, and nonlinear characteristics, the output power curve of the power amplifier is not linear, logarithmic, exponential, or other regular relationships. Therefore, the traditional control method cannot accurately achieve the modification of the output power of the power amplifier by setting a fixed attenuation value, and the output power cannot be stably maintained at the target value.

[0003] In order to avoid the influence of temperature on the output power of the power amplifier, and to avoid the influence of thermal performance of components and nonlinear characteristics, there is currently a method of adjusting the output power of the power amplifier by setting the attenuation value of the power amplifier using the PID method. This method can adjust the output power of the power amplifier to be near the target value and fluctuate up and down, but the adjustment accuracy is poor and the power fluctuation during the output process is large.

[0004] In view of the above problems, there is an urgent need for a solution that accurately adjusts the power and has a small power fluctuation range after adjustment. SUMMARY

[0005] In view of the above analysis, the embodiments of the present application aim to provide a microwave power control method combining dichotomy and feedback adjustment to solve the problems of inaccurate power adjustment and large power fluctuation after adjustment.

[0006] In one aspect, the embodiments of the present application provide a microwave power control method combining dichotomy and feedback adjustment, comprising a dichotomy process and a feedback adjustment process after the dichotomy process is completed.

[0007] The dichotomy process comprises: performing dichotomy search on the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor and issuing it to the baseband signal module, until the difference between the reported current power value and the target power value meets the error range; the baseband signal module generates a first baseband signal according to the first power adjustment factor issued each time; and the power amplifier amplifies each first baseband signal and reports the current power value.

[0008] The feedback adjustment process comprises: the power amplifier reports the current power value to the monitoring module in response to the query instruction, and generates a second power adjustment factor and issues it to the baseband signal module when the difference between the reported current power value and the target power value exceeds the error range; the baseband signal module generates a corresponding second baseband signal based on the second power adjustment factor; and the power amplifier amplifies the second baseband signal.

[0009] Optionally, the bisection search of the power adjustment factor based on the target power value and the current power value reported by the power amplifier generates a first power adjustment factor and issues the first power adjustment factor to the baseband signal module, and the method comprises:

[0010] calculating a middle value Vcent based on the maximum value Vmax and the minimum value Vmin of the first power adjustment factor; when the difference between the power value reported by the power amplifier and the target power value is less than the error range, modifying the minimum value of the first power adjustment factor to the current middle value, i.e., Vmin=Vcent, and calculating a new middle value Vcent=(Vmax+Vmin) / 2 based on Vmax and Vmin and issuing the new middle value to the baseband signal module again;

[0011] when the difference between the power value reported by the power amplifier and the target power value is greater than the error range, modifying the maximum value of the first power adjustment factor to the current middle value, i.e., Vmax=Vcent, and calculating a new middle value Vcent=(Vmax+Vmin) / 2 and issuing the new middle value to the baseband signal module again.

[0012] Optionally, the second power adjustment factor is calculated based on the following formula:

[0013] D=D0+k * (Pt-P0)

[0014] wherein D is the second power adjustment factor; D0 is the initial value of the second power adjustment factor; k is the power adjustment proportion coefficient; Pt is the current power value reported by the power amplifier, and P0 is the target power value.

[0015] Optionally, the method further comprises amplifying, by the power amplifier, the baseband signal into a radio frequency signal and radiating the radio frequency signal to the air through an antenna.

[0016] In another aspect, an embodiment of the present application provides a microwave power control system combining bisection search and feedback adjustment, comprising:

[0017] a monitoring module configured to, in the bisection search process, perform bisection search based on a target power value and a current power value reported by a power amplifier, generate a first power adjustment factor, and issue the first power adjustment factor to a baseband signal until the difference between the current power value reported and the target power value meets the requirement; and configured to, in the feedback adjustment process after the bisection search is completed, query the current power value reported by the power amplifier at regular intervals, generate a second power adjustment factor when the current power value reported exceeds the error range of the target power value, and issue the second power adjustment factor to the baseband signal module;

[0018] a baseband signal module configured to generate a first baseband signal according to a first power adjustment factor issued by the monitoring module in a dichotomy searching process, and configured to generate a corresponding second baseband signal according to a second power adjustment factor in a feedback adjustment process;

[0019] a power amplifier configured to amplify the first baseband signal and report a current power value in the dichotomy searching process, and configured to report the current power value to the monitoring module in response to a query instruction in the feedback adjustment process, and configured to amplify the second baseband signal.

[0020] Optionally, the monitoring module is configured to perform the following process, specifically comprising:

[0021] when the difference between the power reported by the power amplifier and the target power value is not within an error range, issuing the first power adjustment factor and performing the dichotomy searching process;

[0022] when the difference between the power reported by the power amplifier and the target power value is within the error range, stopping the dichotomy searching process, and taking the first power adjustment factor at this moment as an initial value of the second power adjustment factor.

[0023] Optionally, the dichotomy searching process is implemented by the following process:

[0024] calculating an intermediate value Vcent based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the difference between the power reported by the power amplifier and the target power value is less than the error range, modifying the minimum value of the first power adjustment factor to the current intermediate value, i.e. Vmin = Vcent, and calculating a new intermediate value Vcent = (Vmax + Vmin) / 2 based on Vmax and Vmin and issuing the new intermediate value to the baseband signal module;

[0025] when the difference between the power reported by the power amplifier and the target power value is greater than the error range, modifying the maximum value of the first power adjustment factor to the current intermediate value, i.e. Vmax = Vcent, and calculating a new intermediate value Vcent = (Vmax + Vmin) / 2 based on Vmax and Vmin and issuing the new intermediate value to the baseband signal module.

[0026] Optionally, the second power adjustment factor is calculated based on the following formula:

[0027] D = D0 + k * (Pt - P0)

[0028] wherein D is the second power adjustment factor, D0 is an initial value of the second power adjustment factor, k is a power adjustment proportionality coefficient, Pt is the current power value reported by the power amplifier, and P0 is the target power value.

[0029] Optionally, the monitoring module is further configured to perform the following process, specifically comprising:

[0030] sending a parameter of the target signal to the baseband signal module; the parameter comprises: signal type, carrier frequency, bandwidth; the baseband signal module generates a baseband signal based on the parameter and outputs to the power amplifier;

[0031] initializing the power amplifier, setting the frequency value of the power amplifier as the signal carrier frequency and setting the attenuation value as the default value 0.

[0032] Optionally, the first power adjustment factor has a maximum value of 65536 and a minimum value of 0.

[0033] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0034] 1. Based on the target power required by the user and the power value reported by the power amplifier, a bisection method is used to generate a power adjustment factor and send it to the baseband signal module, the baseband signal module forms a baseband signal according to the adjustment factor and sends it to the power amplifier, the power amplifier amplifies the baseband signal and reports it, and the cycle continues until the difference between the reported current power value and the target power value meets the error range; a power value that matches the power required by the user is obtained.

[0035] When the bisection method is stopped, feedback adjustment is started at the same time, and when the power value reported by the power amplifier exceeds the error range of the power value required by the user, the power adjustment factor is generated again and sent to the baseband signal, and the corresponding baseband signal is generated. Through the mechanism of combining bisection method and feedback, the power value reported by the power amplifier is always matched with the power value required by the user, so as to realize accurate control of the power of the microwave system.

[0036] In the present application, the above-mentioned technical solutions can be combined with each other to realize more preferred combination schemes. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or be understood by implementing the present application. The purpose and other advantages of the present application can be realized and obtained from the contents specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings are included to provide a further understanding of the application and are incorporated herein and constitute a part of the detailed description. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:

[0038] Figure 1 A power adjustment control flowchart in the embodiment of the present application;

[0039] Figure 2 A power adjustment system block diagram in the embodiment of the present application. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present application will be described in detail below with reference to the drawings, which form a part of this application. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application, and to enable the skilled in the art to make and use the application.

[0041] One specific embodiment of the present application discloses a microwave power control method combining dichotomous search and feedback adjustment, as shown in the figure. Specifically, it includes a dichotomous search process and a feedback adjustment process after the dichotomous search is completed. Figure 1 The dichotomous search process includes: performing dichotomous search on the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating the first power adjustment factor and issuing it to the baseband signal module, until the difference between the reported current power value and the target power value meets the error range; the baseband signal module generates the first baseband signal according to the first power adjustment factor issued each time; the power amplifier amplifies each of the first baseband signals and reports the current power value. The feedback adjustment process includes: the power amplifier reports the current power value to the monitoring module in response to the query instruction, and generates the second power adjustment factor and issues it to the baseband signal module when the difference between the reported current power value and the target power value exceeds the error range; the baseband signal module generates the corresponding second baseband signal based on the second power adjustment factor; the power amplifier amplifies the second baseband signal.

[0042] Specifically, the dichotomous search on the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating the first power adjustment factor and issuing it to the baseband signal module includes:

[0043] Calculating the intermediate value Vcent based on the maximum value Vmax and the minimum value Vmin of the first power adjustment factor; when the difference between the power value reported by the power amplifier and the target power value is less than the error range, modifying the minimum value of the first power adjustment factor to the current intermediate value, i.e. Vmin = Vcent, and calculating a new intermediate value Vcent = (Vmax + Vmin) / 2 based on Vmax and Vmin and issuing it to the baseband signal module again;

[0044] When the difference between the power value reported by the power amplifier and the target power value is greater than the error range, modifying the maximum value of the first power adjustment factor to the current intermediate value, i.e. Vmax = Vcent, and calculating a new intermediate value Vcent = (Vmax + Vmin) / 2 and issuing it to the baseband signal module again.

[0045] When the difference between the power value reported by the power amplifier and the target power value is greater than the error range, modifying the maximum value of the first power adjustment factor to the current intermediate value, i.e. Vmax = Vcent, and calculating a new intermediate value Vcent = (Vmax + Vmin) / 2 and issuing it to the baseband signal module again.

[0046] When the difference between the power value reported by the power amplifier and the target power value is greater than the error range, modifying the maximum value of the first power adjustment factor to the current intermediate value, i.e. Vmax = Vcent, and calculating a new intermediate value Vcent = (Vmax + Vmin) / 2 and issuing it to the baseband signal module again.

[0047] Specifically, in the binary search process, the monitoring control software is provided with a running environment and external physical interfaces by the display control device. The display control device is a notebook computer, the operating system is a Galaxy Kirin V10 system, and the external physical interfaces include a USB and an RJ45 network port. The USB is used for external input devices such as a mouse, and the RJ45 network port is used for connecting a baseband signal module to realize data transmission and reception.

[0048] The monitoring control software in the display control device receives the keyboard and mouse interactive operation of the user interface, analyzes and displays the state information of the baseband signal module and the power amplifier module. The state of the baseband signal module is the baseband software running state, including normal, in operation, and fault; the state of the power amplifier module is the software running state (including normal and fault), the current power value of the power amplifier module, and the current attenuation value of the power amplifier module. The power adjustment logic is executed, and the scene signal parameter information and control instructions (including starting baseband signal output, ending baseband signal output, and power adjustment factor) are sent to the baseband signal module through the network port of the display control device, and the control instructions (including power amplifier enable, power amplifier off, power amplifier working frequency, and power amplifier attenuation value) are sent to the power amplifier module.

[0049] In the process of generating the baseband signal, the monitoring control software in the display control device sends the parameters of the target generated signal to the baseband signal module, such as signal type, carrier frequency, and bandwidth. The signal type determines the waveform pattern of the output baseband signal, the bandwidth determines the frequency domain width of the output baseband signal, and the carrier frequency determines the frequency value of the output baseband signal. The baseband signal is generated according to the parameter information sent by the display control device, and the output of the baseband signal, the stop of the baseband signal, and the amplitude adjustment of the baseband signal are realized according to the start signal output, end signal output, and power adjustment factor information sent by the display control device. The power adjustment factor can be configured with 16 bits in the FPGA software of the baseband signal module, and the adjustment range is 0-65536. The principle of the power adjustment factor taking effect is to multiply the original FPGA signal DA output value by (power adjustment factor / 65536); when the power adjustment factor value is 65536, the FPGA outputs the baseband signal at full power; when the power adjustment factor value is 0, the FPGA does not output the baseband signal.

[0050] The second power adjustment factor is calculated based on the following formula:

[0051] D = D0 + k * (Pt-P0)

[0052] Wherein, D is the second power adjustment factor; D0 is the initial value of the second power adjustment factor, in the first feedback adjustment, D0 is the final first power adjustment factor obtained by the binary search process, after each feedback adjustment is completed, let D0=D, that is, the current D0 takes the value of the second power adjustment factor of the last adjustment, in order to prepare for the next adjustment. K is the power adjustment proportion coefficient; Pt is the current power value reported by the power amplifier, P0 is the target power value.

[0053] Wherein, the power amplifier amplifies the baseband signal into a radio frequency signal, and the power amplifier reports the signal amplified each time to the air through the antenna.

[0054] It should be noted that, if k is too large, the power feedback adjustment step will be too large, and it may be difficult to achieve stable power output within the error range (P0±0.2dBm). Even always fluctuate up and down outside the error range.

[0055] If k is too small, the feedback adjustment speed will be affected, and the power fluctuation period will be long.

[0056] After actual test, in the embodiment, the value of k is selected as-250, that is, the power adjustment factor decreases by 25 for each 0.1dB of current power exceeding.

[0057] The display control device network port issues control instructions (including power amplifier enable, power amplifier off, power amplifier working frequency, power amplifier attenuation value) to the power amplifier module. The display control device controls the enable of the power amplifier module to open, sets the frequency value of the power amplifier module to the signal carrier frequency, and sets the attenuation value to the default value 0. After the power amplifier module executes the control instructions, the baseband signal is amplified into a radio frequency signal and radiated into the air through the antenna.

[0058] Then the power amplifier module amplifies and outputs the signal according to the baseband signal output by the baseband signal module; parses and executes the control instructions of the center frequency and the attenuation value, and reports the center frequency, the attenuation value, and the signal output power information of the power amplifier module.

[0059] Specifically, the monitoring control software sends the power amplifier center frequency and attenuation value information to the baseband signal processing module according to the communication protocol format of the display control device and the baseband signal module through the network port. There is serial communication between the baseband signal module and the power amplifier module, and the baseband signal module sends the communication protocol content to the power amplifier module through the serial port.

[0060] After receiving the center frequency control instruction, the power amplifier module changes the working frequency of the digital attenuator in the module, so that the power amplifier module can amplify the signal near the frequency flatly.

[0061] After receiving the attenuation instruction, the power amplifier module changes the attenuation value of the digital attenuator in the module, so as to affect the output power of the power amplifier module.

[0062] The embodiment of the present application also discloses a microwave power control system combining dichotomy with feedback adjustment, which is based on the control method of the above-mentioned embodiment of the present application and specifically comprises the following steps:

[0063] a monitoring module, configured to perform dichotomy search based on the target power value and the current power value reported by the power amplifier in the dichotomy search process, to generate a first power adjustment factor and send the first power adjustment factor to the baseband signal module until the difference between the reported current power value and the target power value meets the requirement, and configured to perform feedback adjustment after the dichotomy search, to query the current power value reported by the power amplifier at a fixed time, and to generate a second power adjustment factor and send the second power adjustment factor to the baseband signal module when the reported current power value is out of the error range of the target power value;

[0064] a baseband signal module, configured to generate a first baseband signal according to the first power adjustment factor sent by the monitoring module in the dichotomy search process, and configured to generate a corresponding second baseband signal according to the second power adjustment factor in the feedback adjustment process;

[0065] a power amplifier, configured to amplify the first baseband signal and report the current power value in the dichotomy search process, and configured to report the current power value to the monitoring module in response to the query instruction in the feedback adjustment process, and configured to amplify the second baseband signal.

[0066] The monitoring module performs the following processes, specifically comprising:

[0067] when the difference between the power reported by the power amplifier and the target power value is not within the error range, the first power adjustment factor is sent, and the dichotomy search process is performed;

[0068] when the difference between the power reported by the power amplifier and the target power value is within the error range, the dichotomy search process is stopped, and the first power adjustment factor at this moment is taken as the initial value of the second power adjustment factor.

[0069] Specifically, the dichotomy search is implemented through the following processes:

[0070] an intermediate value Vcent is calculated based on the maximum value Vmax and the minimum value Vmin of the first power adjustment factor; when the difference between the power value reported by the power amplifier and the target power value is less than the error range, the minimum value of the first power adjustment factor is modified to the current intermediate value, i.e. Vmin=Vcent, and a new intermediate value Vcent=(Vmax+Vmin) / 2 is calculated again based on Vmax and Vmin and sent to the baseband signal module;

[0071] When the difference between the power value reported by the power amplifier and the target power value is greater than the error range, the first power adjustment factor maximum value is modified to the current intermediate value, i.e., Vmax=Vcent, and a new intermediate value Vcent=(Vmax+Vmin) / 2 is calculated and sent to the baseband signal module.

[0072] In the feedback process, the second power adjustment factor is calculated based on the following formula:

[0073] D=D0+k * (Pt-P0)

[0074] Wherein, D is the second power adjustment factor; D0 is the initial value of the second power adjustment factor, i.e., the final first power adjustment factor obtained by the binary search process; k is the power adjustment proportion coefficient; Pt is the current power value reported by the power amplifier, and P0 is the target power value.

[0075] Preferably, the monitoring module is further configured to perform the following process, specifically comprising:

[0076] Sending the parameters of the target signal to the baseband signal module; the parameters include: signal type, carrier frequency, bandwidth; the baseband signal module generates a baseband signal based on the parameters and outputs to the power amplifier;

[0077] Initializing the power amplifier, setting the frequency value of the power amplifier to the signal carrier frequency and setting the attenuation value to the default value 0.

[0078] Wherein, the first power adjustment factor maximum value is 65536, and the minimum value is 0.

[0079] Display and control device: provides a running environment and external physical interface for the monitoring control software. The display and control device is a notebook computer, the operating system is Galaxy Kirin V10 system, and the external physical interface includes USB and RJ45 network port. The USB is used for external mouse and other input devices, and the RJ45 network port is used for connecting the baseband signal module to realize data transmission and reception.

[0080] Monitoring control software:

[0081] (1) Accepting the keyboard and mouse interactive operation of the user interface, analyzing and displaying the state information of the baseband signal module and the power amplifier module. The state of the baseband signal module is the baseband software running state, including normal, operating, and fault; the state of the power amplifier module is the software running state (including normal and fault), the current power value of the power amplifier module, and the current attenuation value of the power amplifier module.

[0082] (2) Executing the power adjustment logic (the specific process is introduced in the power adjustment process).

[0083] (3) Through the network interface of the display and control device, scene signal parameter information and control instructions (including start baseband signal output, end baseband signal output, power adjustment factor) are sent to the baseband signal module, and control instructions (including power amplifier enable, power amplifier off, power amplifier working frequency, power amplifier attenuation value) are sent to the power amplifier module.

[0084] The baseband signal module comprises:

[0085] (1) The baseband signal is generated according to the scene signal parameter information sent by the display and control device, and the output of the baseband signal, the stop of the baseband signal and the amplitude adjustment of the baseband signal are realized according to the start signal output, the end signal output and the power adjustment factor information sent by the display and control device. The power adjustment factor can be configured as 16 bits in the FPGA software of the baseband signal module, and the adjustment range is 0-65536. The principle of the power adjustment factor taking effect is to multiply the original FPGA signal DA output value by (power adjustment factor / 65536); when the power adjustment factor value is 65536, the FPGA outputs the baseband signal at full power; when the power adjustment factor value is 0, the FPGA does not output the baseband signal.

[0086] (2) The power amplifier module control instructions sent by the display and control device are converted into serial port data and sent to the power amplifier module.

[0087] The power amplifier module comprises:

[0088] (1) The baseband signal output by the baseband signal module is received, and the signal is amplified and output.

[0089] (2) The control instructions of the center frequency and the attenuation value are parsed and executed.

[0090] (3) The center frequency, attenuation value and signal output power information of the power amplifier module are reported.

[0091] The power supply device supplies power for the display and control device, the baseband signal module and the power amplifier module.

[0092] The antenna radiates the radio frequency signal output by the power amplifier module into the air.

[0093] The communication connection relationship of the system is that the display and control device and the baseband signal module communicate through the network interface, and the baseband signal module and the power amplifier module communicate through the serial port.

[0094] The working process of the system is as follows:

[0095] The monitoring control software in the display control device sends parameters of the target generation signal, such as signal type, carrier frequency, bandwidth, etc., to the baseband signal module. The baseband signal module generates a corresponding baseband signal according to the signal parameters. After receiving the control instruction of starting signal output, the baseband signal module outputs the baseband signal to the power amplifier module. The display control device controls the enablement of the power amplifier module to be turned on, sets the frequency value of the power amplifier module to be the signal carrier frequency, and sets the attenuation value to be the default value 0. After the power amplifier module executes the control instruction, the baseband signal is amplified into a radio frequency signal, which is radiated into the air through an antenna.

[0096] The power amplifier module has an output power detection function, which can detect the output signal power value and report it to the baseband signal module through a serial port with a reporting accuracy of 0.1 dBm. The baseband signal module forwards the state data of the power amplifier module, which is ultimately reported to the display control device through a network port and displayed on the interface of the monitoring control software.

[0097] After the user views the output power value of the power amplifier module on the interface of the monitoring control software, he decides whether to adjust the system output power according to actual needs. Since the default system output power is the maximum value (denoted as Pmax), only quantitative reduction of the power amplifier output power to the target value (P0) is supported during initial adjustment. When the system output power value is not Pmax, quantitative increase of the system output power (not exceeding Pmax) is supported according to user requirements.

[0098] The adjustment process of the system output power is as follows:

[0099] The monitoring control software accepts user power adjustment operations, obtains the target output power P0, and uses the control logic in the software to configure the power adjustment factor in the baseband signal module according to the change of the power amplifier reported power Pt, so that the output power reported by the power amplifier reaches the error limit range allowed by the user target P0. The adjustment error range is limited to 0.2 dBm, i.e. when Pt is within the value range of P0±0.2 dBm, the monitoring control software determines that the power adjustment is successful and stops the power adjustment.

[0100] To improve the power adjustment speed, the bisection method is first used for power search. The specific process is as follows: the monitoring control software performs bisection search between the maximum value (65536) and the minimum value (0) of the power adjustment factor in the baseband signal module. After each time the power adjustment factor is sent to the baseband signal module, the corresponding power amplifier power report value is read back. By comparing the size relationship between the current power amplifier power report value and the target value, the adjustment direction of the next bisection method is determined. After several times of searching, when the difference between the power amplifier power report value and the target value meets the preset error range, the search is stopped, and the power amplifier power at this time is taken as the adjustment result.

[0101] The specific process of dichotomy is as follows: according to the maximum value Vmax (initially 65536) and the minimum value Vmin (initially 0) of the power adjustment factor, an intermediate value Vcent is calculated, the intermediate value Vcent of the power adjustment factor is sent to the baseband signal module, and then the reported value Pt of the power amplifier is read back, the relationship between the reported value Pt and the target power value P0 is compared, if Pt-P0<-0.2dB, the minimum value of the power adjustment factor is modified as the current intermediate value, that is, Vmin=Vcent, and a new intermediate value Vcent=(Vmax+Vmin) / 2 is calculated again according to Vmax and Vmin and sent to the baseband signal module; if Pt-P0>0.2dB, the maximum value of the power adjustment factor is modified as the current intermediate value, that is, Vmax=Vcent, and a new intermediate value Vcent=(Vmax+Vmin) / 2 is calculated again and sent to the baseband signal module. After sending the new Vcent each time, the reported value Pt of the power amplifier is read back after waiting for 0.3 seconds, if the absolute value of the difference between Pt and P0 exceeds 0.2dBm, the steps in the previous part are executed again until the difference between them meets the requirements, and the power adjustment factor value at this time is recorded as D0. According to multiple actual measurements, the dichotomy adjustment process can be completed in 6 seconds in most cases.

[0102] After the microwave power reaches the target value, due to the influence of temperature and the thermal performance of components on the power amplifier, the output power may change over time, therefore, after the dichotomy adjustment is completed, the system will enter a continuous feedback adjustment state.

[0103] The specific process of feedback adjustment is as follows: the monitoring control software queries the reported value of the power amplifier every 3 seconds, when the reported value exceeds the error range (P0±0.2dBm) of the target value, the monitoring control software sends the power adjustment factor value to the baseband signal module as follows:

[0104] D=D0+k * (Pt-P0)

[0105] Wherein, D is the second power adjustment factor; D0 is the initial value of the second power adjustment factor, in the first feedback adjustment, D0 is the final first power adjustment factor obtained by the dichotomy search process, after each feedback adjustment is completed, D0=D, that is, the value of the current D0 is the value of the second power adjustment factor of the last adjustment, which is prepared for the next adjustment. k is the power adjustment proportion coefficient, the unit is 10 / dBm. Pt is the current power value reported by the power amplifier, the unit is dBm, and the precision is 0.1. P0 is the target power value. In this embodiment, k=-250.

[0106] The binary search process and the feedback regulation process are mutually exclusive. The binary search is performed while the feedback regulation is not performed. After the binary search is completed, the feedback regulation is started to ensure that the system power is always stable near the target power. The feedback regulation process continues until a new power control target value is issued by the user or the system ends running.

[0107] It is worth noting that: every time the system transmits new signal parameters, the monitoring control software will reset the power adjustment factor of the signal baseband module to the maximum value 65536 by default.

[0108] Embodiment

[0109] 1. The user configures the AM signal through the display control device, with a carrier frequency of 100 MHz and a bandwidth of 100 kHz.

[0110] 2. The display control device transmits the signal parameters to the baseband signal module, which generates a baseband signal and transmits it to the power amplifier module.

[0111] 3. The display control device controls the power amplifier module to enable and set the power amplifier center frequency to 100 MHz. The power amplifier module starts to amplify the baseband signal and outputs it to the antenna.

[0112] 4. Assume that the power value reported by the power amplifier module from the display control device at this time is 50 dBm.

[0113] 5. The user's target AM signal power is 40 dBm.

[0114] 6. The user inputs the target value of 40 dBm on the display control device.

[0115] 7. The display control device starts the binary power regulation according to the target power of 40 dBm, and continuously transmits the power adjustment factor value to the baseband signal module. After each transmission, the display control device reads the power value reported by the power amplifier module.

[0116] 8. After several times of binary regulation, when the difference between the power value reported by the power amplifier and the target value of 40 dBm is less than 0.2 dBm, the binary regulation is ended.

[0117] 9. At this time, the user does not need to continue to operate, and the display control device automatically enters the feedback regulation stage

[0118] 10. In the feedback regulation stage, the display control device reads the power value reported by the power amplifier every 3 seconds and compares it with the target value of 40 dBm.

[0119] 11. When the reported power exceeds 40±0.2 dBm, the display control device automatically transmits a new power adjustment factor, and the calculation formula is D=D0+k * (Pt-P0).

[0120] 12. The feedback regulation will continue until the user sends an end signal or issues a new target power value.

[0121] The application uses the control logic in the software to configure the power adjustment factor in the signal baseband module according to the change of the power reported by the power amplifier, so that the antenna radiation intensity reaches the target adjustment effect of the user.

[0122] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be completed by a computer program instructing relevant hardware, and the program can be stored in a computer readable storage medium. The computer readable storage medium is a disk, an optical disk, a read-only memory, a random access memory, etc.

[0123] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A method for microwave power control combining binary search with feedback regulation, characterized in that, The binary search process and the feedback adjustment process after the binary search are completed. The binary search process comprises: performing binary search on the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor and sending it to the baseband signal module, until the difference between the reported current power value and the target power value meets the error range; the baseband signal module generates a first baseband signal according to the first power adjustment factor sent each time; the power amplifier amplifies each first baseband signal and reports the current power value; The feedback adjustment process comprises: the power amplifier reports the current power value to the monitoring module in response to the query instruction, and generates a second power adjustment factor and sends it to the baseband signal module when the difference between the reported current power value and the target power value exceeds the error range; the baseband signal module generates a corresponding second baseband signal based on the second power adjustment factor; the power amplifier amplifies the second baseband signal; The second power adjustment factor is calculated based on the following formula: D = D0+ k * (Pt - P0) Wherein, D is the second power adjustment factor; D0 is the final first power adjustment factor obtained by the binary search process; k is the power adjustment proportion coefficient; Pt is the current power value reported by the power amplifier, and P0 is the target power value.

2. The method according to claim 1, wherein, The binary search on the power adjustment factor based on the target power value and the current power value reported by the power amplifier, generating a first power adjustment factor and sending it to the baseband signal module comprises: An intermediate value Vcent is calculated based on the maximum value Vmax and the minimum value Vmin of the first power adjustment factor; when the difference between the power value reported by the power amplifier and the target power value is less than the error range, the minimum value of the first power adjustment factor is modified to the current intermediate value, that is, Vmin is equal to Vcent, and a new intermediate value Vcent=(Vmax+Vmin) / 2 is calculated again based on Vmax and Vmin and sent to the baseband signal module; When the difference between the power value reported by the power amplifier and the target power value is greater than the error range, the maximum value of the first power adjustment factor is modified to the current intermediate value, that is, Vmax is equal to Vcent, and a new intermediate value Vcent=(Vmax+Vmin) / 2 is calculated again and sent to the baseband signal module.

3. The method of claim 1, wherein, It also includes that the power amplifier amplifies the baseband signal into a radio frequency signal and radiates it to the air through an antenna.

4. A microwave power control system combining binary search with feedback regulation, characterized in that, It comprises: A monitoring module is configured to perform binary search based on the target power value and the current power value reported by the power amplifier during the binary search process, generate a first power adjustment factor and send it to the baseband signal, until the difference between the reported current power value and the target power value meets the requirement; and is configured to query the current power value reported by the power amplifier during the feedback adjustment process after the binary search is completed, generate a second power adjustment factor and send it to the baseband signal module when the reported current power value exceeds the error range of the target power value; A baseband signal module is configured to generate a first baseband signal according to the first power adjustment factor sent by the monitoring module each time during the binary search process; And is configured to generate a corresponding second baseband signal based on the second power adjustment factor during the feedback adjustment process; The power amplifier is configured to amplify a first baseband signal and report a current power value in a binary search process; The monitoring module is configured to report the current power value to the monitoring module in response to a query instruction in a feedback adjustment process, and to amplify a second baseband signal. The second power adjustment factor is calculated based on the following formula: D = D0+ k * (Pt - P0) Wherein, D is the second power adjustment factor; D0 is the final first power adjustment factor obtained in the binary search process; k is a power adjustment proportion coefficient; Pt is the current power value reported by the power amplifier, and P0 is a target power value.

5. The binary search with feedback regulation combined microwave power control system according to claim 4, characterized in that, The monitoring module performs the following process, specifically comprising: When the power reported by the power amplifier is not within an error range from the target power value, a first power adjustment factor is issued, and a binary search process is performed; When the power reported by the power amplifier is within the error range from the target power value, the binary search process is stopped, and the first power adjustment factor at this moment is taken as an initial value of a second power adjustment factor.

6. The binary search with feedback regulation combined microwave power control system according to claim 5, characterized in that, The binary search process is implemented by the following process: An intermediate value Vcent is calculated based on a maximum value Vmax and a minimum value Vmin of the first power adjustment factor; when the power value reported by the power amplifier is less than the error range from the target power value, the minimum value of the first power adjustment factor is modified to the current intermediate value, i.e. Vmin = Vcent, and a new intermediate value Vcent = (Vmax + Vmin) / 2 is calculated again based on Vmax and Vmin and issued to the baseband signal module; When the power value reported by the power amplifier is greater than the error range from the target power value, the maximum value of the first power adjustment factor is modified to the current intermediate value, i.e. Vmax = Vcent, and a new intermediate value Vcent = (Vmax + Vmin) / 2 is calculated again and issued to the baseband signal module.

7. The binary search with feedback regulation combined microwave power control system according to claim 4, characterized in that, The monitoring module is further configured to perform the following process, specifically comprising: Sending parameters of a target signal to the baseband signal module; the parameters include signal type, carrier frequency, and bandwidth; the baseband signal module generates a baseband signal based on the parameters and outputs the baseband signal to the power amplifier; Initializing the power amplifier, setting the frequency value of the power amplifier to the signal carrier frequency, and setting the attenuation value to a default value of 0.

8. The binary search with feedback regulation combined microwave power control system according to claim 4, characterized in that, The maximum value of the first power adjustment factor is 65536, and the minimum value is 0.

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