A dual-mode receiver

Abstract

The application discloses a dual-mode receiver, which comprises a first radio frequency interface, a second radio frequency interface, a signal distribution unit, a shared receiving processing unit, a control processing unit and a calibration output unit. The signal distribution unit distributes the satellite intermediate frequency signal input by the first radio frequency interface into a first path signal and a second path signal, the first path signal is output to the second radio frequency interface, and the second path signal is input into the shared receiving processing unit. The shared receiving processing unit shares a receiving channel and outputs receiving data in a narrow-band reference signal strength detection mode and a modulated carrier demodulation tracking mode, the control processing unit generates a target strength value according to a current receiving mode, and the calibration output unit converts the target strength value into a tracking output value of the same output range and outputs the tracking output value to a servo control system. The dual-mode receiver can be connected to a satellite intermediate frequency link online, and is compatible with narrow-band reference signal tracking and modulated carrier tracking.

Description

Technical Field

[0001] This invention relates to the field of satellite signal communication transmission technology, and specifically to a dual-mode receiver. Background Technology

[0002] When a satellite antenna is aligned with a target satellite and maintains stable tracking, it typically needs to receive a reference signal from the target satellite and control the servo system to adjust the antenna's azimuth and elevation angles based on changes in the reference signal strength. The types of signals that can be used as tracking references vary across different satellite communication systems: in traditional satellite systems, single-tone beacon signals or continuous carrier signals are used as tracking references; in high-throughput satellites, multi-beam satellites, and DVB-based satellite communication systems, modulated carriers such as DVB-S, DVB-S2, and DVB-S2X are used as tracking references. For beacon signals and continuous carrier signals, the receiver typically performs narrowband detection within the frequency range corresponding to the target detection frequency, obtaining the strength value used for tracking through amplitude detection or power detection. For modulated carrier signals, the receiver typically needs to perform carrier acquisition, frequency synchronization, symbol rate configuration, lock determination, or demodulation processing to obtain strength information reflecting the antenna's pointing direction from gain control quantities, received power quantities, lock status, or signal quality quantities during the demodulation process. It is evident that the two types of signals have different strength sources, dynamic ranges, and output characteristics. If independent receivers are used to output strength values, the servo control system needs to adapt to different interfaces and different output relationships, which is not conducive to the integration of miniaturized terminals and multi-system satellite communication terminals. Summary of the Invention

[0003] The technical problem to be solved by this invention is: how to use the same receiving and processing resources to separately complete the strength detection of the narrowband reference signal and the demodulation and tracking of the modulated carrier, and output the same range of tracking output value to the servo control system without affecting the subsequent equipment to continue receiving satellite intermediate frequency signals.

[0004] To address the aforementioned problems, this invention provides a dual-mode receiver, comprising a first radio frequency interface, a second radio frequency interface, a signal distribution unit, a shared reception processing unit, a control processing unit, and a calibration output unit.

[0005] The first radio frequency (RF) interface is used to receive satellite intermediate frequency (IF) signals, and the second RF interface is used to output the satellite IF signals. The signal distribution unit is connected between the first RF interface, the second RF interface, and the shared receiving processing unit, and is used to distribute the satellite IF signal input through the first RF interface into a first signal and a second signal. The first signal is output to the second RF interface so that subsequent communication equipment can continue to receive the satellite IF signals; the second signal is input to the shared receiving processing unit so that the dual-mode receiver can generate a tracking output value.

[0006] The shared receiving and processing unit is used to receive and process the second signal through the same receiving path in the first receiving mode and the second receiving mode to obtain received data.

[0007] The control processing unit is connected to the shared receiving processing unit and is used to determine the current receiving mode according to external control instructions, and to generate a target intensity value corresponding to the current receiving mode based on the received data.

[0008] The calibration output unit is connected to the control processing unit and is used to convert the target intensity value into a tracking output value with the same output range according to the calibration relationship corresponding to the current receiving mode, and then output the tracking output value to the servo control system. Here, "same output range" means that the tracking output values ​​output to the servo control system in both the first and second receiving modes have a unified range and a unified tracking meaning, enabling the servo control system to use the tracking output value through the same interface and the same tracking logic.

[0009] The first receiving mode is a narrowband reference signal strength detection mode, wherein the narrowband reference signal includes at least one of a beacon signal and a continuous carrier signal; the second receiving mode is a modulation carrier demodulation tracking mode.

[0010] Furthermore, the signal distribution unit includes a 1-to-2 power divider; the 1-to-2 power divider has an input terminal, a first output terminal, and a second output terminal, the input terminal is connected to the first radio frequency interface, the first output terminal is connected to the second radio frequency interface, and the second output terminal is connected to the shared receiving and processing unit.

[0011] Furthermore, "same receiving path" here means that the first receiving mode and the second receiving mode at least share the RF receiving, frequency selection, frequency conversion, and sampling processing resources after entering the shared receiving processing unit, rather than setting up separate beacon receivers and separate modulation carrier receivers. The frequency selection referred to in this invention means selecting a signal within the target frequency range from the second signal based on the frequency parameters corresponding to the current receiving mode. Specifically, the control processing unit configures the frequency synthesis module according to the detection frequency point of the target narrowband reference signal or the frequency point parameters of the modulation carrier. The frequency synthesis module generates a corresponding local oscillator signal. The frequency conversion module converts the signal within the target frequency range into a predetermined intermediate frequency signal or baseband signal based on the local oscillator signal. The baseband processing module then retains the signal within the target frequency range through filtering and bandwidth limiting processing. Thus, the frequency synthesis module, frequency conversion module, and baseband processing module cooperate to complete the frequency selection.

[0012] Further, the shared receiving processing unit includes an RF gain module, a frequency synthesis module, a frequency conversion module, a baseband processing module, and a sampling module. The RF gain module is used to adjust the gain of the second signal; the frequency synthesis module is used to generate a local oscillator signal according to the frequency parameters corresponding to the current receiving mode; the frequency conversion module is used to perform frequency conversion processing on the second signal according to the local oscillator signal to obtain an intermediate signal; the baseband processing module is used to perform at least one of filtering, gain processing, and bandwidth limiting processing on the intermediate signal; and the sampling module is used to output sampled data based on the processed intermediate signal. The received data is data output by the shared receiving processing unit and used by the control processing unit to generate a target strength value, including at least one of sampled data and receiving status data. The sampled data is digitized signal data obtained by the shared receiving processing unit after sampling processing, and in different embodiments includes at least one of baseband sampled data, low-IF sampled data, and I / Q sampled data. The receiving status data is operating status data generated by the shared receiving processing unit during receiving or demodulation processing, including demodulation status data, which includes at least one of gain control quantity, received power quantity, carrier acquisition status, lock-in status, and signal quality quantity. The signal quality parameters include at least one of the following: carrier-to-noise ratio, modulation error rate, bit error rate estimate, frame synchronization quality, and lock quality. At least one of the gain control parameter, received power parameter, and signal quality parameter is used to generate the second strength value, and at least one of the carrier acquisition state and lock state is used to determine whether the second strength value is valid.

[0013] Furthermore, the control processing unit includes a mode control module and a tracking quantity generation module; the mode control module is used to configure the current receiving mode according to external control instructions and send the frequency parameters corresponding to the current receiving mode to the shared receiving processing unit; the tracking quantity generation module is used to select the corresponding strength generation process according to the current receiving mode: in the first receiving mode, the received data is sent to the narrowband detection module, and in the second receiving mode, the received data is sent to the modulation carrier demodulation strength extraction module; the tracking quantity generation module is used to generate a first strength value according to the narrowband detection result in the received data in the first receiving mode, and to generate a second strength value according to the modulation carrier demodulation processing result in the second receiving mode.

[0014] Furthermore, the tracking quantity generation module includes a narrowband detection module; the narrowband detection module includes a frequency point configuration submodule, a detection bandwidth configuration submodule, a digital filtering submodule, and an intensity calculation submodule. The frequency point configuration submodule is used to configure the detection frequency point of the target narrowband reference signal; the detection bandwidth configuration submodule is used to configure the detection bandwidth of the target narrowband reference signal; the digital filtering submodule is used to extract data located within a frequency range centered on the detection frequency point and defined by the corresponding detection bandwidth from the received data according to the detection bandwidth; the intensity calculation submodule is used to calculate at least one of amplitude detection value and power detection value based on the data within the frequency range, and generate a first intensity value.

[0015] Further, the tracking quantity generation module includes a modulation carrier demodulation strength extraction module; the modulation carrier demodulation strength extraction module includes a parameter configuration submodule, a carrier acquisition submodule, a lock determination submodule, and a strength extraction submodule. The parameter configuration submodule is used to configure the frequency parameters and symbol rate parameters of the modulation carrier; the carrier acquisition submodule is used to call the shared receiving processing unit to perform carrier acquisition and obtain the carrier acquisition status; the lock determination submodule is used to obtain the lock status output by the shared receiving processing unit and determine whether the modulation carrier is in a locked state; the strength extraction submodule is used to generate a second strength value based on at least one of the gain control quantity, received power quantity, and signal quality quantity during the demodulation process, and to determine the validity of the second strength value based on at least one of the carrier acquisition status and the lock status. The modulation carrier includes at least one of DVB-S, DVB-S2, and DVB-S2X modulation carriers.

[0016] Furthermore, the calibration output unit includes a calibration storage module and an intensity mapping module. The calibration storage module is used to store a first calibration relationship corresponding to a first receiving mode and a second calibration relationship corresponding to a second receiving mode. The intensity mapping module is used to determine a target calibration relationship from the first calibration relationship and the second calibration relationship according to the current receiving mode, and map the target intensity value to the tracking output value according to the target calibration relationship.

[0017] Furthermore, the first calibration relationship and the second calibration relationship are respectively selected from a set of relationships consisting of a lookup table relationship, a piecewise linear relationship, and a curve fitting relationship; the intensity mapping module is also used to compensate the tracking output value based on at least one of the noise floor estimate and the lock state.

[0018] Furthermore, the dual-mode receiver also includes a multi-core control interface and a power supply control unit. The multi-core control interface is connected to the control processing unit and the calibration output unit, and is used to receive external control commands, output tracking values, and receive external power supply; the power supply control unit is connected to the first radio frequency interface, and is used to provide power supply voltage to an external low-noise down-converter via the first radio frequency interface.

[0019] Furthermore, the dual-mode receiver also includes a circuit board. The first RF interface, the second RF interface, the signal distribution unit, the shared reception processing unit, and the control processing unit are disposed on the circuit board; the circuit board is also provided with a power module for supplying power to the shared reception processing unit, the control processing unit, and the calibration output unit.

[0020] Furthermore, the dual-mode receiver also includes a shielding cover that covers the high-frequency circuitry of the shared receiving and processing unit.

[0021] The beneficial effects of the present invention are as follows: 1. The present invention divides the satellite intermediate frequency signal input from the first radio frequency interface into two paths through the signal distribution unit. One path is output to the second radio frequency interface, and the other path is input to the shared receiving and processing unit, so that the dual-mode receiver can connect online to the satellite intermediate frequency link between the external low-noise downconverter and the subsequent communication equipment. The required signal for antenna tracking can be extracted without cutting off the receiving path of the subsequent equipment, thereby improving the convenience and compatibility of system access.

[0022] 2. This invention uses a shared receiving processing unit to share the same receiving path in both the first and second receiving modes to receive and process beacon signals, continuous carrier signals, and modulated carrier signals. This avoids the need to set up separate independent beacon receiving links and independent modulated carrier receiving links, which helps reduce the number of receiving links, external interfaces, and equipment wiring complexity. It also helps to achieve miniaturization and low power consumption of the receiver.

[0023] 3. This invention generates a corresponding target intensity value based on the current receiving mode through a control processing unit, and calls the calibration relationship corresponding to the current receiving mode through a calibration output unit, thereby uniformly converting intensity values ​​from different sources and with different dynamic ranges into tracking output values ​​with the same output range. Therefore, the servo control system does not need to set separate tracking input interfaces and conversion logic for different signal systems; it can perform maximum antenna tracking based on the same tracking output value, improving the adaptability of the dual-mode receiver in traditional satellite systems, high-throughput multi-beam satellite systems, and miniaturized satellite communication terminals. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the dual-mode receiver provided in an embodiment of the present invention; Figure 2This is a schematic diagram of data interaction between the shared receiving processing unit and the control processing unit provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the process for generating a first intensity value in the first receiving mode provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the second intensity value generation and calibration output process in the second receiving mode provided in the embodiment; Figure 5 This is a comparison chart of the average power consumption of the shared receiving and processing structure of this invention and the area occupied by the functional circuits; Figure 6 This is a comparison diagram of the output relationship when the two receiving modes of this invention adopt a fixed conversion method and a mode-specific calibration method; Figure 7 This is a simulation curve of the antenna pointing deviation changing over time under the two receiving modes of the present invention; Figure 8 This is a simulation curve of the tracking output value during the receiving mode switching process of this invention. Detailed Implementation

[0025] The invention will now be described in further detail with reference to the accompanying drawings.

[0026] The embodiments described in this invention are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Equivalent substitutions made by those skilled in the art regarding module form, chip model, interface type, communication protocol, frequency range, output range, and installation structure without departing from the concept of this invention should also fall within the scope of protection of this invention.

[0027] Example 1: As Figure 1 As shown, this invention discloses a dual-mode receiver. This dual-mode receiver is positioned between the output of an external low-noise downconverter and the subsequent satellite communication equipment, or it can be positioned within a radio frequency link consisting of a satellite antenna, a low-noise downconverter, a servo control system, and subsequent modulation and demodulation equipment. The low-noise downconverter converts the satellite downlink signal into a satellite intermediate frequency signal, which is then fed into the first radio frequency interface of the dual-mode receiver via a feeder.

[0028] The dual-mode receiver includes a first RF interface, a second RF interface, a signal distribution unit, a shared reception processing unit, a control processing unit, and a calibration output unit. The first RF interface is used to receive satellite intermediate frequency (IF) signals. The second RF interface is used to output satellite IF signals to downstream equipment. In one embodiment, the dual-mode receiver further includes a multi-core control interface and a power supply control unit. The multi-core control interface is used to receive external control commands, output tracking output values, and receive power supply for the entire receiver. The power supply control unit can output the power supply voltage to an external low-noise down-converter via the first RF interface.

[0029] After the satellite intermediate frequency (IF) signal enters through the first radio frequency (RF) interface, it is first input to the signal distribution unit. The signal distribution unit splits the satellite IF signal into a first signal and a second signal. The first signal is sent to the second RF interface, allowing subsequent equipment to still receive the satellite IF signal; the second signal is sent to the shared receiving processing unit to generate the received data required for antenna tracking. Through this structure, the dual-mode receiver can be connected online to the RF link as a tracking quantity extraction module without occupying the RF input channel of subsequent equipment.

[0030] The shared receiver processing unit shares the same receiver path in both the first and second receiver modes. The first receiver mode is used for narrowband reference signal strength detection. The narrowband reference signal is a beacon signal, a continuous carrier signal, or other reference signal that can reflect the antenna's pointing direction through narrowband strength detection. The second receiver mode is used for modulated carrier demodulation and tracking. The modulated carrier is DVB-S, DVB-S2, DVB-S2X, or other satellite modulated carriers that can provide demodulation status or quality. The shared receiver processing unit is not limited to a specific chip; it can be implemented using integrated tuning and demodulation devices, or it can be implemented using an RF tuner, analog-to-digital converter, digital processor, FPGA, DSP, or a combination thereof.

[0031] The control processing unit interacts with the shared receiving processing unit. The control processing unit determines the current receiving mode based on external control commands and sends frequency parameters, symbol rate parameters, detection bandwidth parameters, or other configuration parameters to the shared receiving processing unit. After completing frequency selection, receiving transformation, and sampling processing, the shared receiving processing unit provides the received data to the control processing unit. The control processing unit performs narrowband detection or modulated carrier demodulation strength extraction on the received data according to the current receiving mode to generate a target strength value.

[0032] The calibration output unit converts the target intensity value into a tracking output value with the same output range and outputs it to the servo control system. The servo control system acquires this tracking output value during antenna scanning or tracking and adjusts the antenna azimuth and elevation angles according to the maximum value tracking strategy. When the tracking output value increases, it indicates that the antenna is gradually approaching the direction of the target signal's maximum; when the tracking output value decreases, it indicates that the antenna is deviating from the direction of the target signal's maximum. Thus, the dual-mode receiver can provide a unified tracking reference for the servo control system.

[0033] The signal distribution unit is used to split the satellite intermediate frequency (IF) signal input from the first RF interface into two paths. In one embodiment, the signal distribution unit includes a 1-to-2 power divider, employing a resistive power divider network, a microstrip power divider network, a directional coupling structure, or other RF distribution structures that meet the frequency range and impedance matching requirements. The first output terminal of the power divider is used to form a transparent outgoing branch, allowing the satellite IF signal to be output to the second RF interface; the second output terminal of the power divider is used to form a receiving processing branch, enabling the shared receiving processing unit to receive the satellite IF signal and generate received data.

[0034] To reduce the impact of the dual-mode receiver on downstream equipment, the transmission loss between the first output terminal and the second RF interface meets the normal reception requirements of the downstream equipment.

[0035] like Figure 2 As shown, the main function of the shared receiving processing unit is not to perform external control, but to perform shared receiving processing on the second signal provided by the signal distribution unit and to provide received data to the control processing unit. The shared receiving processing unit includes an RF gain module, a frequency synthesis module, a frequency conversion module, a baseband processing module, and a sampling module. After receiving the second signal, the RF gain module performs low-noise amplification, attenuation control, or automatic gain adjustment to ensure that subsequent frequency conversion and sampling processing are within a suitable dynamic range. The frequency synthesis module generates a local oscillator signal based on the frequency parameters sent by the control processing unit. The frequency conversion module performs frequency conversion processing on the second signal based on the local oscillator signal, creating an intermediate signal that facilitates subsequent filtering, sampling, or digital processing. The intermediate signal can be a baseband signal, a low-IF signal, an I / Q signal, or other signal forms that facilitate subsequent processing. The baseband processing module performs filtering, gain processing, or bandwidth limiting processing on the intermediate signal. The sampling module samples the processed intermediate signal to obtain sampled data that can be read or calculated by the control processing unit. The sampled data constitutes at least a portion of the received data.

[0036] In the first receiving mode, the shared receiving processing unit selects a frequency based on the detection frequency of the target narrowband reference signal and outputs the received data corresponding to the first receiving mode. The received data includes at least one of sampled data and receiving status data, wherein the sampled data is used for narrowband filtering and strength calculation. In the second receiving mode, the shared receiving processing unit performs receiving processing based on the frequency parameters and symbol rate parameters of the modulation carrier and outputs the received data corresponding to the second receiving mode. The received data includes at least one of sampled data and demodulation status data, wherein the demodulation status data is used to generate a second strength value and determine whether the second strength value is valid. Thus, the first and second receiving modes share the same receiving processing resources, avoiding the need for two independent receivers.

[0037] In one embodiment, in the second receiving mode, the received data may include demodulation status data. The demodulation status data includes at least one of the following: radio frequency gain control quantity, baseband gain control quantity, received power quantity, carrier acquisition status, lock-in status, carrier-to-noise ratio, modulation error rate, bit error rate estimate, and lock-in quality quantity. The control processing unit can calculate a second strength value based on the sampled data, or it can generate a second strength value based on the gain control quantity, received power quantity, or signal quality quantity in the demodulation status data.

[0038] The control processing unit is implemented using an MCU, microprocessor, FPGA, DSP, programmable logic device, or a combination thereof. The control processing unit includes a mode control module and a tracking quantity generation module. The mode control module is responsible for parsing external control commands and determining the current reception mode; the tracking quantity generation module is responsible for generating the target intensity value based on the current reception mode.

[0039] External control commands are input via a multi-core control interface. These commands include at least one of the following: mode switching command, frequency setting command, symbol rate setting command, detection bandwidth setting command, output time interval setting command, and status query command. When the mode control module receives a command to enter the first receiving mode, it configures the frequency parameters and detection bandwidth parameters of the shared receiving processing unit, causing the shared receiving processing unit to output received data around the target narrowband reference signal. When the mode control module receives a command to enter the second receiving mode, it configures the frequency parameters and symbol rate parameters of the shared receiving processing unit, causing the shared receiving processing unit to output received data corresponding to the second receiving mode according to the modulation carrier parameters. This received data includes at least one of sampled data and demodulation status data.

[0040] The control processing unit and the shared receiving processing unit exchange data via a parallel bus, serial bus, register interface, SPI, I2C, UART, or other on-chip / board-level communication interface. The control processing unit writes configuration parameters to the shared receiving processing unit and reads the received data output by the shared receiving processing unit. The received data includes at least one of sampled data and receiving status data; in the second receiving mode, the receiving status data includes demodulation status data.

[0041] By setting up a control processing unit, mode control, tracking quantity generation, and calibration output are not all mixed up in the shared receiver processing unit. The shared receiver processing unit is mainly responsible for receiving and processing data and providing demodulation status, while the control processing unit is mainly responsible for mode management, data reading, and tracking strength generation. The two work together to achieve dual-mode tracking.

[0042] like Figure 3 As shown, the first receiving mode in this invention is a narrowband reference signal strength detection mode. In one embodiment, the narrowband reference signal can be a single-tone beacon signal or a continuous carrier signal. This mode increases the narrowband signal strength within the frequency range corresponding to the target detection frequency point when the antenna is pointed close to the target satellite; and decreases the narrowband signal strength within the frequency range corresponding to the target detection frequency point when the antenna is pointed away from the target satellite. Therefore, a first strength value is generated based on the narrowband detection result, and this first strength value is used as the basis for tracking the maximum value of the antenna.

[0043] In the first receiving mode, the mode control module first determines the detection frequency point based on external control commands. This detection frequency point can be a beacon frequency point or a continuous carrier frequency point. Subsequently, the mode control module configures the detection bandwidth. A narrower detection bandwidth can suppress noise outside the target frequency point and improve the tracking signal-to-noise ratio; a wider detection bandwidth can improve the acquisition success rate in cases of initial acquisition or large frequency offset.

[0044] The narrowband detection module in the tracking quantity generation module includes a frequency point configuration submodule, a detection bandwidth configuration submodule, a digital filtering submodule, and an intensity calculation submodule. The digital filtering submodule extracts data located within the detection bandwidth range corresponding to the detection frequency point from the received data. The data within the detection bandwidth range refers to the received data centered on the detection frequency point and falling within the frequency range defined by the detection bandwidth. For example, when the detection frequency point is... When the detection bandwidth is B, the detection bandwidth range is - to + It can also be configured according to the filter structure. The equivalent passband range centered on [center]. If the received data is I / Q sampled data, then the filtered data is represented as [expression]. and The intensity calculation submodule is used to calculate the average power value within the frequency range limited by the detection bandwidth. :

[0045] Where N is the number of sampling points involved in the averaging calculation. N is set according to the response speed and output smoothness required by the servo control system. A larger N results in a smoother output, suitable for stable tracking; a smaller N results in a faster response speed, suitable for rapid scanning and capture. These are the I-channel sampled values ​​after digital filtering; is the Q-channel sampled value after digital filtering; n is the sampled number.

[0046] In another implementation, the intensity calculation submodule generates a first intensity value based on the amplitude value. For example, first calculate:

[0047] Again The first intensity value is obtained by performing averaging, median filtering, or moving average. This represents the instantaneous amplitude value corresponding to the nth sampling point. Both the power calculation and amplitude calculation described above can reflect the strength of the target narrowband reference signal. One of them can be selected based on computing resources and signal stability.

[0048] To further improve stability in weak signal environments, the narrowband detection module can also estimate the noise floor. Specifically, within the frequency range limited by the detection bandwidth, a frequency band that does not contain the target signal is selected as the noise estimation band, and the noise power is calculated. and according to - or / Generate the first intensity value. By subtracting or normalizing the noise floor, the impact of received noise, in-band interference, or link temperature drift on the tracking output value can be reduced.

[0049] like Figure 4 As shown, the second receiving mode in this invention is a modulated carrier demodulation tracking mode. In one embodiment, this mode is applicable to satellite modulated carriers such as DVB-S, DVB-S2, and DVB-S2X, and also to other satellite modulated carriers capable of providing demodulation status or quality. Unlike single-tone beacons or continuous carriers, modulated carriers typically have symbol rate, modulation scheme, and coding structure; simple narrowband power detection alone may not stably reflect their usable tracking quality. Therefore, this embodiment generates a second strength value based on the modulated carrier demodulation processing result. Figure 4The carrier acquisition submodule is used to call the shared receive processing unit to perform carrier acquisition, and the lock determination submodule is used to read the lock status output by the shared receive processing unit.

[0050] In the second receiving mode, the control processing unit configures the frequency and symbol rate parameters of the modulation carrier according to external control commands. The shared receiving processing unit performs frequency selection and receiving transformation based on the frequency parameters, and sets the receiving bandwidth or sampling processing parameters based on the symbol rate parameters. Subsequently, the carrier acquisition submodule calls the shared receiving processing unit to perform carrier acquisition and obtains the carrier acquisition status generated by the shared receiving processing unit. Carrier acquisition includes at least one of frequency offset search, symbol timing recovery, carrier recovery, frame synchronization, and pilot tracking.

[0051] After carrier acquisition is complete, the lock determination submodule obtains the lock status output by the shared receiving processing unit and determines whether the modulated carrier is locked based on the lock status. If the modulated carrier is not locked, it indicates that the currently received data may come from noise, adjacent channel interference, or an incorrect frequency. In this case, the strength extraction submodule can either output an invalid flag or maintain the previous valid strength value for a preset time to prevent the servo control system from malfunctioning due to short-term lockout. If the modulated carrier is locked, the strength extraction submodule generates a second strength value based on at least one of the gain control quantity, received power quantity, and signal quality quantity obtained during demodulation.

[0052] In one implementation, the second strength value is generated by a gain control quantity. The automatic gain control quantity of the receiver link corresponds to the input signal strength. Generally, when the input signal increases, the receiver gain required to maintain the amplitude of the subsequent signal decreases; when the input signal decreases, the required receiver gain increases. Therefore, the equivalent receiver strength can be calculated based on the RF gain control quantity and the baseband gain control quantity. Let GRF represent the RF gain control quantity and GBB represent the baseband gain control quantity. , and As the calibration coefficient, the second strength value It can be represented as:

[0053] in, and The sign of the coefficient is determined by the direction of the actual gain control code. A larger gain control code indicates a larger actual gain, and the corresponding coefficient is positive; a larger gain control code indicates a smaller actual gain, and the corresponding coefficient is negative.

[0054] In another implementation, the second strength value is generated from the received power. The shared receive processing unit or control processing unit calculates the received power estimate after matched filtering, timing recovery, or carrier recovery, and uses it as the second strength value.

[0055] In another implementation, the second strength value is generated from signal quality parameters. These parameters include at least one of the following: carrier-to-noise ratio (CNR), modulation error rate (MOR), bit error rate estimate, frame synchronization quality, and lock quality. When the antenna is pointed away from the target satellite, the CNR typically decreases, the MOR typically increases, and the lock quality typically decreases. Therefore, these signal quality parameters are used to reflect the impact of antenna pointing on the received quality of the modulated carrier.

[0056] In another implementation, the second intensity value It is generated by a weighted average of multiple parameters. For example:

[0057] Where R is the normalized value of received signal strength, and C is the normalized value of signal quality. , These are the weighting coefficients. + =1. The locking state variable L is used to determine whether the second strength value is valid; when L indicates that it is unlocked, the second strength value is marked as invalid, the previous valid value is retained, or the output update weight is reduced.

[0058] The above-mentioned generation methods can be used individually or in combination. The key is that the second strength value originates from the modulation and demodulation process and reflects the influence of antenna pointing on received strength or quality.

[0059] The first and second intensity values ​​originate from different sources and cannot be directly used as the same tracking output value. Therefore, even if the first and second intensity values ​​are the same, they may not correspond to the same antenna tracking meaning. To solve this problem, this embodiment provides a calibration output unit. The calibration output unit includes a calibration storage module and an intensity mapping module. The calibration storage module stores the first calibration relationship corresponding to the first receiving mode and the second calibration relationship corresponding to the second receiving mode. The intensity mapping module determines the target calibration relationship based on the current receiving mode and maps the target intensity value to a tracking output value according to the target calibration relationship.

[0060] In one implementation, the first calibration relationship is obtained through factory calibration. During calibration, a signal source is used to input beacon signals or continuous carrier signals of multiple power levels to the first RF interface. The dual-mode receiver operates in the first receiving mode, records the first intensity value at each power level, and maps it to a preset output range. This preset output range can be an analog voltage range or a digital range. For example, the lowest effective input power is mapped to the lower limit of the output range, and the highest effective input power is mapped to the upper limit of the output range. Intermediate power points are used to form a calibration relationship through table lookup or fitting.

[0061] The second calibration relationship is obtained in a similar manner. During calibration, a signal source is used to input modulated carrier signals of multiple power levels to the first RF interface, and the corresponding frequency and symbol rate parameters are configured. The dual-mode receiver operates in the second receiving mode and records the second strength value at each power level. The second strength value is derived from the automatic gain control value, the received power value, the carrier-to-noise ratio, the modulation error rate, or the bit error rate estimate. Based on the second strength value corresponding to each power level and the target output range, the second calibration relationship is generated.

[0062] The first and second calibration relationships can employ a lookup table, a piecewise linear relationship, or a curve fitting relationship. When using a lookup table, the calibration storage module saves multiple calibration points, and the intensity mapping module finds adjacent calibration points based on the current target intensity value and interpolates. When using a piecewise linear relationship, the intensity mapping module first determines the interval containing the target intensity value, and then uses the slope and intercept corresponding to that interval to calculate the tracking output value. When using a curve fitting relationship, the intensity mapping module calculates the tracking output value based on preset fitting parameters.

[0063] If the target intensity value is S, and These are two adjacent calibrated intensity values ​​that surround the target intensity value S; and Let V be the tracking output value corresponding to the two adjacent calibration intensity values; then the tracking output value V is calculated as follows:

[0064] When S is below the lower limit of the calibration range, the output range is set to the lower limit; when S is above the upper limit of the calibration range, the output range is set to the upper limit. Limiting ensures that the tracking output value remains within the allowable range of the servo control system.

[0065] In the first receiving mode, the intensity mapping module compensates the tracking output value based on the noise floor estimate. In the second receiving mode, the intensity mapping module compensates the tracking output value based on the locking status. For example, when unlocked, it outputs an invalid flag, maintains the previous valid value, or reduces the output weight; after locking, it updates the tracking output value. Through these compensations, the tracking output values ​​output in both receiving modes have better consistency and usability.

[0066] In this embodiment, the calibration output unit further includes an output conversion module. The intensity mapping module obtains the tracking output value in digital form according to the target calibration relationship. The output conversion module includes a digital-to-analog converter circuit and a voltage conditioning circuit. The digital-to-analog converter circuit converts the digital tracking output value into an analog voltage, and the voltage conditioning circuit amplifies, buffers, and limits the analog voltage to output a tracking output voltage of 0V to 10V at the tracking output terminal. In the embodiment using digital output, the output conversion module outputs a digital quantity corresponding to the tracking output value according to a preset digital encoding range. The first receiving mode and the second receiving mode use the same lower limit of the output range, upper limit of the output range, and output interface. When the target intensity value decreases as the input signal increases, the calibration relationship uses a negative slope mapping; when the target intensity value increases as the input signal increases, the calibration relationship uses a positive slope mapping. Regardless of the original direction of change of the target intensity value, the calibrated tracking output value is set to increase as the effective received signal increases.

[0067] The multi-pin control interface is used to establish the electrical connection between the dual-mode receiver and an external antenna controller or host computer. The multi-pin control interface includes a tracking output terminal, a ground terminal, a receive communication terminal, a transmit communication terminal, and a power input terminal. The tracking output terminal outputs an analog voltage or digital value corresponding to the tracking output value; the receive and transmit communication terminals transmit external control commands and status feedback information; and the power input terminal receives external power.

[0068] External control commands include mode switching commands, frequency setting commands, symbol rate setting commands, detection bandwidth setting commands, output time interval setting commands, power supply setting commands, and status query commands. Upon receiving a mode switching command, the control processing unit switches to the current receiving mode; upon receiving a frequency setting command, it configures the frequency parameters of the shared receiving processing unit; upon receiving a symbol rate setting command, it configures the modulation carrier demodulation processing in the second receiving mode; upon receiving a detection bandwidth setting command, it configures the narrowband detection bandwidth in the first receiving mode; and upon receiving a status query command, it returns at least one of the following: current mode, current frequency, current output value, locked state, power supply state, and error state.

[0069] The power supply control unit connects to the first RF interface and provides power supply voltage to an external low-noise downconverter. The power supply control unit includes a voltage selection module, a power supply switch module, an overcurrent protection module, and an additional control signal generation module. Based on external control commands, the power supply control unit selects to shut down the power supply, output a first power supply voltage, or output a second power supply voltage. The additional control signal generation module provides the control signals required for local oscillator switching or operating state switching to the external low-noise downconverter. The power supply control function makes it easier for dual-mode receivers to connect to actual satellite antenna systems, reduces the number of external power supply and control devices, and improves overall system integration.

[0070] In this embodiment, the dual-mode receiver includes a circuit board. A first RF interface, a second RF interface, a signal distribution unit, a shared reception processing unit, a control processing unit, and a power module are mounted on the circuit board. The power module supplies power to the shared reception processing unit, the control processing unit, and the calibration output unit. A multi-pin control interface is located on one side of the circuit board and is used to connect to signal lines such as tracking output voltage, GND, RX, TX, and VCC.

[0071] In another embodiment, the dual-mode receiver includes a circuit board and a shielding cover. The shielding cover covers at least a portion of the high-frequency circuitry of the shared receiving processing unit to reduce the impact of external interference on the high-frequency receiving processing and to reduce the external radiation of the high-frequency circuitry. A power module is disposed on the power module surface opposite the main circuit surface and is used to supply power to the shared receiving processing unit, the control processing unit, and the calibration output unit.

[0072] It should be noted that the mounting carrier, housing, shielding cover, heat sink, interface position, and wiring sequence can all be adjusted according to the specific product. The satellite intermediate frequency signal input to the first RF interface is processed by the signal distribution unit to form a first signal output to the second RF interface and a second signal input to the shared receiving and processing unit. The shared receiving and processing unit shares receiving and processing resources in both the first and second receiving modes.

[0073] In one embodiment, the workflow of the present invention is as follows.

[0074] After the dual-mode receiver is powered on, the control processing unit initializes the multi-core control interface, the shared receiver processing unit, and the calibration output unit. If power is required to supply power to an external low-noise down-converter by default, the power supply control unit outputs the power supply voltage according to the default configuration. The control processing unit reads the default receiver mode, default frequency parameters, default detection bandwidth parameters, default symbol rate parameters, and default calibration relationships.

[0075] When an external control device sends a command to enter the first receiving mode, the control processing unit sets the current receiving mode to narrowband reference signal strength detection mode. The control processing unit configures the detection frequency of the target narrowband reference signal according to the frequency setting command and configures the detection bandwidth according to the detection bandwidth setting command. The shared receiving processing unit performs frequency selection, reception transformation, and sampling processing based on the detection frequency and detection bandwidth parameters, and outputs the received data corresponding to the first receiving mode to the control processing unit. The received data includes at least one of sampled data and receiving status data. The control processing unit extracts data located within the detection bandwidth range corresponding to the detection frequency from the received data and calculates a first strength value. The calibration output unit calls the first calibration relationship, maps the first strength value as the target strength value to a tracking output value, and outputs it to the servo control system.

[0076] When an external control device sends a command to enter the second receiving mode, the control processing unit sets the current receiving mode to modulation carrier demodulation tracking mode. The control processing unit configures the modulation carrier frequency point according to the frequency setting command and the demodulation processing parameters according to the symbol rate setting command. The shared receiving processing unit performs receiving and demodulation processing according to the modulation carrier frequency point and symbol rate parameters, and outputs the received data corresponding to the second receiving mode to the control processing unit. The received data includes at least one of sampled data and demodulation status data. The carrier acquisition submodule acquires the carrier acquisition status, obtains the lock status through the lock judgment submodule, and after determining that the second strength value is valid, generates a second strength value based on at least one of gain control quantity, received power quantity, and signal quality quantity. The calibration output unit calls the second calibration relationship to map the second strength value as the target strength value to a tracking output value; the output conversion module converts the tracking output value into a tracking output voltage with the same output range as the first receiving mode and outputs it to the servo control system through the multi-core control interface.

[0077] When an external control device sends a status query command, the control processing unit reads the current mode, current frequency, current symbol rate, current detection bandwidth, tracking output value, lockout status, power-on status, and error status, and returns the status information through the multi-core control interface. In this way, the external antenna controller can confirm in real time whether the dual-mode receiver has entered the correct mode and execute antenna control based on the tracking output value.

[0078] To verify the technical effect of the present invention in multiplexing the shared receiving processing unit in the first receiving mode and the second receiving mode, this embodiment uses the system-level power consumption and functional circuit area occupied by the dual-mode receiver for simulation comparison.

[0079] The comparison structure includes independent narrowband reference signal receiving links and independent modulated carrier receiving links. Each receiving link includes an RF gain and frequency synthesis section, a receiving conversion and sampling section, and a baseband processing section. The two receiving processing links share a set of control processing, power supply, and interface sections, and each receiving link generates a corresponding intensity output.

[0080] In this invention, the structure reuses a set of RF gain, frequency synthesis, receive conversion, baseband processing, and sampling processing resources in both the first and second receiving modes. The control processing unit configures the detection frequency, detection bandwidth, modulation carrier frequency, and symbol rate parameters according to the current receiving mode, and causes the tracking quantity generation module to execute the target strength value generation process corresponding to the current receiving mode.

[0081] In the experiment, the power consumption of a single receiver processing link was determined by the sum of the power consumption of the RF gain and frequency synthesis section, the receiver conversion and sampling section, and the baseband processing section. The nominal power consumption of the RF gain and frequency synthesis section was set to 0.42W, the nominal power consumption of the receiver conversion and sampling section was set to 0.42W, the nominal power consumption of the baseband processing section was set to 0.72W, and the nominal power consumption of a single receiver processing link was 1.56W. The nominal power consumption of the common part consisting of the control processing unit, calibration output unit, and multi-core control interface was set to 0.24W.

[0082] The power consumption of a single receiving and processing link is set to a normal distribution with a mean of 1.56W and a standard deviation of 0.06W. The power consumption of the common part is set to a normal distribution with a mean of 0.24W and a standard deviation of 0.015W. The conversion efficiency of the power module is set to vary randomly between 0.88 and 0.92. The total power consumption is determined according to the following formula:

[0083] in, For the total power consumption, The number of receiving and processing links, For the first The power consumption of the receiver processing link. For the power consumption of the common part, This refers to the conversion efficiency of the power module. Comparison of structures. Take 2, the structure of the present invention Take 1.

[0084] The power consumption simulation results are shown in Table 1 after 1000 Monte Carlo simulations were performed on the two structures.

[0085] Table 1 Comparison of power consumption simulation results

[0086] The equivalent footprint of each functional module was statistically analyzed based on the device packaging and peripheral circuitry. The equivalent footprint of a single receiving and processing link is 620 mm², the equivalent footprint of the control processing and calibration output section is 360 mm², and the equivalent footprint of the power supply, interface, and protection section is 420 mm². Therefore, the equivalent footprint of the functional circuitry in the comparative structure is 2020 mm², while the equivalent footprint of the functional circuitry in the structure of this invention is 1400 mm², a reduction of approximately 30.7%.

[0087] Figure 5 The average power consumption and the relative equivalent area occupied by functional circuits of the comparative structure and the structure of the present invention are shown. Figure 5As shown in Table 1, under the condition that both structures have narrowband reference signal tracking and modulation carrier tracking functions, this invention reduces one set of RF tuning, receiver conversion, sampling, and baseband processing resources by reusing the shared receiver processing unit, thereby reducing the average power consumption of the whole device from 3.74W to 2.00W. Moreover, the power consumption of the structure of this invention does not exceed 2.14W under 95% of the simulation conditions. Therefore, this invention does not simply set the two receiving modes in the same housing, but enables the two receiving modes to reuse the same receiver processing resources through mode configuration, thereby reducing the number of redundant circuits, receiver links, and external interfaces, and reducing the power consumption of the whole device and the area occupied by functional circuits.

[0088] To verify the uniform conversion effect of the calibration output unit on the target intensity value under different receiving modes, intensity output simulation models for the first and second receiving modes were established.

[0089] The first receiving mode uses a narrowband reference signal, with an input power range of -95dBm to -45dBm; the second receiving mode uses a DVB modulated carrier, with an input power range of -65dBm to -25dBm. The tracking output range for both receiving modes is set to 0V to 10V.

[0090] During the experiment, the input power of each receiving mode was normalized to 0 to 1 according to its effective input range. When the normalization strength is 0, it corresponds to the lowest effective input power of the corresponding receiving mode; when the normalization strength is 1, it corresponds to the highest effective input power of the corresponding receiving mode.

[0091] Compare the following two output methods: The first method is a fixed conversion method, in which the first and second receiving modes use the same fixed conversion relationship to convert the target intensity value into the tracking output value.

[0092] The second method is the mode-specific calibration method of this invention, which establishes a first calibration relationship corresponding to the first receiving mode and a second calibration relationship corresponding to the second receiving mode. Specifically, calibration points are set when the normalization intensity is 0, 0.2, 0.4, 0.6, 0.8 and 1.0, respectively, corresponding to the tracking output values ​​of 0V, 2V, 4V, 6V, 8V and 10V, and piecewise linear interpolation is used between adjacent calibration points.

[0093] In the experiment, the normalization intensity was increased from 0 to 1, and 21 test points were set at intervals of 0.05. Each test point was subjected to 100 simulations with random perturbations. The results are shown in Table 2.

[0094] Table 2 Comparison of outputs between the fixed conversion method and the mode-specific calibration method of this invention

[0095] Figure 6 The output changes of the two receiving modes before and after calibration are shown. Figure 6 The theoretically unified output curve, the output curve of the first receiving mode after sub-mode calibration, and the output curve of the second receiving mode after sub-mode calibration all basically overlap within most of the normalized signal strength range. This overlap indicates that, after adopting the sub-mode calibration method of this invention, the tracking output values ​​of both the first and second receiving modes can approach the theoretically unified output value, and the two receiving modes have high output consistency under the same normalized signal strength. When using a fixed conversion method, due to the different sources, zero points, and ranges of variation of the first and second intensity values, there is a significant deviation between the output curves of the two receiving modes. After adopting the sub-mode calibration method of this invention, the tracking output curves of both the first and second receiving modes are close to the theoretical output curve from 0V to 10V, and the maximum output difference between the two modes is reduced from 1.38V to 0.03V.

[0096] Therefore, by calling the corresponding calibration relationship according to the current receiving mode, the first intensity value and the second intensity value with different sources and dynamic ranges can be converted into tracking output values ​​with the same range and the same intensity change meaning, so that the servo control system does not need to set two sets of input conversion relationships separately.

[0097] To verify that the first and second receiving modes can use the same servo control parameters for antenna tracking, this embodiment establishes a simulation model for satellite antenna main beam and maximum value tracking.

[0098] In the experiment, the antenna half-power beamwidth was set to 1.25°, and the initial pointing deviation was set to 0.75°. The input signal in the first receiving mode was a narrowband reference signal, and the input signal in the second receiving mode was a DVB modulated carrier. The corresponding received signal strength was generated according to the antenna pointing deviation, and then converted into a tracking output value from 0V to 10V through the first calibration relationship and the second calibration relationship, respectively.

[0099] The servo control system employs a left-right perturbation maximum value tracking method, acquiring and tracking output values ​​on both sides of the current antenna pointing angle, and adjusting the antenna pointing according to the magnitude relationship between the two output values. The control cycle is set to 50ms, the perturbation angle is set to 0.04°, and the maximum adjustment angle per control cycle is set to 0.06°.

[0100] After determining the servo control parameters in the first receiving mode, the second receiving mode continues to use the same control cycle, disturbance angle, and control gain, without resetting the servo parameters.

[0101] The proposed method and the fixed conversion method were compared. The proposed method calls the first calibration relationship and the second calibration relationship for the two receiving modes respectively; the fixed conversion method uses the same fixed conversion relationship for both receiving modes. Each simulation condition was repeated 200 times. When the absolute value of the pointing deviation is no greater than 0.10° and remains constant for 0.5s, the antenna is considered to have entered a stable tracking state. The results are shown in Table 3.

[0102] Table 3 Comparison of antenna stability under different receiving modes

[0103] Figure 7 The relationship between antenna pointing deviation and time is shown for the first and second receiving modes of the present invention. Both receiving modes can enter a stable tracking state when using the same servo parameters. Statistical comparison results between the fixed conversion method and the method of the present invention are shown in Table 3.

[0104] During the antenna stabilization tracking process, the current receiving mode is switched from the first receiving mode to the second receiving mode, while keeping the servo control parameters unchanged. At the same time as the receiving mode is switched in 4 seconds, a 0.16° pointing disturbance is applied to the antenna platform. The mode switching results are shown in Table 4.

[0105] Table 4 Results of switching from the first receiving mode to the second receiving mode

[0106] Figure 8 The changes in the tracking output value during the receiver mode switching process are shown in Table 4. The maximum transient pointing deviation and recovery settling time after the mode switch are shown in Table 4.

[0107] The above results show that by setting calibration relationships for the first and second receiving modes respectively, the servo control system can use the same tracking input interface, the same maximum value tracking logic, and the same set of control parameters to complete antenna tracking in both modes. Under the condition of receiving mode switching and antenna platform pointing disturbance, the mode-specific calibration method of the present invention can reduce tracking output changes and antenna transient pointing deviation, and shorten the time required to recover stable tracking.

[0108] The present invention may also be implemented in the following alternative ways.

[0109] First, the signal distribution unit is not limited to a one-to-two power divider; it can also use directional couplers, microstrip coupling networks, or other RF distribution structures that can form transparent outgoing branches and receiving processing branches.

[0110] Second, the shared receiving and processing unit can adopt either a zero-IF architecture or a low-IF architecture. The zero-IF architecture directly outputs I / Q baseband data, while the low-IF architecture reduces the impact of DC bias on signal detection.

[0111] Third, the control processing unit can be set up independently of the shared receiving processing unit, or it can be integrated with the shared receiving processing unit in the same device or the same functional board. Regardless of the physical implementation, as long as the shared receiving processing unit provides the received data and the control processing unit generates the target intensity value according to the current receiving mode, it falls under the implementation mode of this invention.

[0112] Fourth, the calibration output unit can output analog voltage, digital value, or both simultaneously. Analog voltage is suitable for traditional servo control systems, while digital value is suitable for digital antenna control systems.

[0113] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A dual-mode receiver, characterized by include: The first radio frequency interface and the second radio frequency interface are used to receive and output satellite intermediate frequency signals, respectively. A signal distribution unit is connected between the first radio frequency interface, the second radio frequency interface, and the shared receiving and processing unit. It is used to distribute the satellite intermediate frequency signal input through the first radio frequency interface into a first signal and a second signal. The first signal is output to the second radio frequency interface, and the second signal is input to the shared receiving and processing unit. The shared receiving and processing unit is used to receive and process the second signal through the same receiving path in the first receiving mode and the second receiving mode, and output the received data. A control processing unit, connected to the shared receiving processing unit, is used to determine the current receiving mode according to external control instructions, and to generate a target intensity value corresponding to the current receiving mode based on the received data. A calibration output unit, connected to the control processing unit, is used to convert the target intensity value into a tracking output value with the same output range according to the calibration relationship corresponding to the current receiving mode, and output the tracking output value to the servo control system. The first receiving mode is a narrowband reference signal strength detection mode, wherein the narrowband reference signal includes at least one of a beacon signal and a continuous carrier signal; the second receiving mode is a modulation carrier demodulation tracking mode.

2. The dual-mode receiver of claim 1, wherein, The signal distribution unit includes a 1-to-2 power divider; the 1-to-2 power divider has an input terminal, a first output terminal, and a second output terminal, the input terminal is connected to the first radio frequency interface, the first output terminal is connected to the second radio frequency interface, and the second output terminal is connected to the shared receiving and processing unit.

3. The dual-mode receiver of claim 1, wherein, The shared receiving and processing unit includes an RF gain module, a frequency synthesis module, a frequency conversion module, a baseband processing module, and a sampling module; The RF gain module is used to adjust the gain of the second signal; the frequency synthesis module is used to generate a local oscillator signal according to the frequency parameters corresponding to the current receiving mode; the frequency conversion module is used to perform frequency conversion processing on the second signal according to the local oscillator signal to obtain an intermediate signal; the baseband processing module is used to perform at least one of filtering processing, gain processing and bandwidth limiting processing on the intermediate signal; the sampling module is used to output sampling data according to the processed intermediate signal.

4. The dual-mode receiver of claim 1, wherein, The control processing unit includes a mode control module and a tracking quantity generation module; The mode control module is used to configure the current receiving mode according to external control instructions and send the frequency parameters corresponding to the current receiving mode to the shared receiving processing unit; the tracking quantity generation module is used to generate a first intensity value according to the narrowband detection result in the received data in the first receiving mode, and generate a second intensity value according to the modulation carrier demodulation processing result in the second receiving mode.

5. The dual-mode receiver according to claim 4, characterized in that, The tracking quantity generation module includes a narrowband detection module; the narrowband detection module includes a frequency point configuration submodule, a detection bandwidth configuration submodule, a digital filtering submodule, and an intensity calculation submodule. The frequency point configuration submodule is used to configure the detection frequency point of the target narrowband reference signal; the detection bandwidth configuration submodule is used to configure the detection bandwidth of the target narrowband reference signal. The digital filtering submodule is used to extract data located within a frequency range centered on the detection frequency point and limited by the corresponding detection bandwidth from the received data according to the detection bandwidth; the intensity calculation submodule is used to calculate at least one of amplitude detection value and power detection value based on the data within the frequency range, and generate a first intensity value.

6. The dual-mode receiver according to claim 4, characterized in that, The tracking quantity generation module includes a modulation carrier demodulation intensity extraction module; The modulation carrier demodulation intensity extraction module includes a parameter configuration submodule, a carrier acquisition submodule, a lock judgment submodule, and an intensity extraction submodule; The parameter configuration submodule is used to configure the frequency point parameters and symbol rate parameters of the modulation carrier; the carrier acquisition submodule is used to call the shared receiving processing unit to perform carrier acquisition and obtain the carrier acquisition status. The locking determination submodule is used to obtain the locking status output by the shared receiving processing unit and determine whether the modulation carrier is in a locked state. The strength extraction submodule is used to generate a second strength value based on at least one of the gain control amount, received power amount and signal quality amount during the demodulation process, and to determine the validity of the second strength value based on at least one of the carrier acquisition state and lock-in state. The modulation carrier includes at least one of DVB-S, DVB-S2, and DVB-S2X modulation carriers.

7. The dual-mode receiver according to claim 1, characterized in that, The calibration output unit includes a calibration storage module and an intensity mapping module; the calibration storage module is used to store a first calibration relationship corresponding to a first receiving mode and a second calibration relationship corresponding to a second receiving mode; The intensity mapping module is used to determine the target calibration relationship from the first calibration relationship and the second calibration relationship according to the current receiving mode, and to map the target intensity value to the tracking output value according to the target calibration relationship.

8. The dual-mode receiver according to claim 7, characterized in that, The first calibration relationship and the second calibration relationship are respectively selected from the relationship set composed of table lookup relationship, piecewise linear relationship and curve fitting relationship; the intensity mapping module is also used to compensate the tracking output value according to at least one of the noise floor estimate and the lock state.

9. The dual-mode receiver according to claim 1, characterized in that, The dual-mode receiver also includes a multi-core control interface and a power supply control unit; The multi-core control interface is connected to the control processing unit and the calibration output unit, and is used to receive external control commands, output tracking output values ​​and receive external power supply; the power supply control unit is connected to the first radio frequency interface, and is used to provide power supply voltage to the external low-noise down-converter via the first radio frequency interface.

10. The dual-mode receiver according to any one of claims 1 to 9, characterized in that, The dual-mode receiver also includes a circuit board; The first radio frequency interface, the second radio frequency interface, the signal distribution unit, the shared receiving and processing unit, and the control processing unit are disposed on the circuit board; the circuit board is also provided with a power supply module for supplying power to the shared receiving and processing unit, the control processing unit, and the calibration output unit.

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