High-speed frequency hopping device and high-speed frequency hopping method
By employing a multi-stage high-speed frequency hopping module for two-stage down-conversion processing, the problem of weak anti-interference capability in beacon tracking is solved, achieving higher anti-interference performance and signal filtering accuracy while reducing power consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGZHOU HAIGE COMMUNICATION GROUP INCORPORATED COMPANY
- Filing Date
- 2026-03-31
- Publication Date
- 2026-06-09
AI Technical Summary
Existing beacon tracking technologies have weak anti-interference capabilities and struggle to maintain stability and accuracy in complex environments.
A multi-stage high-speed frequency hopping module is adopted, including a first-stage and a second-stage high-speed frequency hopping unit. Through two down-conversion processes, spurious signals and image frequency signals are filtered out, thereby improving anti-interference capability.
By performing two down-conversion processes, the anti-interference capability of beacon tracking and the accuracy of signal filtering are significantly improved, while the power consumption of subsequent processing is reduced.
Smart Images
Figure CN122178991A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of satellite communication technology, and in particular to a high-speed frequency hopping device and a high-speed frequency hopping method. Background Technology
[0002] With the continuous development of satellite technology, satellites are increasingly widely and critically applied in numerous fields such as communication, data transmission, and observation. Different types of satellites, such as low Earth orbit satellites, medium Earth orbit satellites, geostationary orbit satellites, and highly elliptical orbit satellites, operate at their respective orbital altitudes and at different speeds. To ensure the stability of communication, data transmission, or observation between satellites and ground equipment, ground equipment must be able to continuously and accurately locate, acquire signals, and track the satellite's trajectory.
[0003] Existing methods for tracking satellites using ground equipment include beacon tracking. Beacon signals, which are radio signals continuously emitted by satellites within a specific frequency range or at a fixed frequency, support ground stations in tracking, identifying, and monitoring the status of satellites, as well as calibrating communication systems. Beacon tracking technology achieves target localization and tracking by detecting and analyzing beacon signals.
[0004] Existing beacon tracking methods typically target fixed beacon frequencies and have weak anti-interference capabilities. Summary of the Invention
[0005] This invention provides a high-speed frequency hopping device and a high-speed frequency hopping method to solve the defect of weak anti-interference capability of beacon tracking in the prior art, and to improve the anti-interference capability of beacon tracking.
[0006] This invention provides a high-speed frequency hopping device, comprising: a high-speed frequency hopping module, the high-speed frequency hopping module including a first-stage high-speed frequency hopping unit and a second-stage high-speed frequency hopping unit; The first-stage high-speed frequency hopping unit is used to generate a first local oscillator signal that matches the beacon signal. Based on the first local oscillator signal, the beacon signal is down-converted to obtain a fixed intermediate frequency band signal. The second-stage high-speed frequency hopping unit is used to generate a second local oscillator signal that matches the fixed intermediate frequency band signal. Based on the second local oscillator signal, the fixed intermediate frequency band signal is down-converted to obtain a low intermediate frequency signal. The low intermediate frequency signal is used for beam tracking.
[0007] According to the high-speed frequency hopping device provided by the present invention, the first-stage high-speed frequency hopping unit includes a first amplification and filtering unit, a first local oscillator signal generation unit, and a first mixer circuit; the first mixer circuit is respectively connected to the first amplification and filtering unit and the first local oscillator signal generation unit. The first amplification and filtering unit is used to amplify and filter the beacon signal to obtain the filtered beacon signal; The first local oscillator signal generation unit is used to determine the first local oscillator frequency based on the frequency band of the beacon signal; and to generate the first local oscillator signal based on the first local oscillator frequency and the first clock signal. The first mixer circuit is used to mix the first local oscillator signal and the filtered beacon signal to obtain a fixed intermediate frequency band signal.
[0008] According to the high-speed frequency hopping device provided by the present invention, the second-stage high-speed frequency hopping unit includes a second amplification and filtering unit, a second local oscillator signal generation unit, and a second mixer circuit; the second mixer circuit is respectively connected to the second amplification and filtering unit and the second local oscillator signal generation unit. The second amplification and filtering unit is used to amplify and filter the fixed intermediate frequency band signal to obtain the filtered fixed intermediate frequency band signal. The second local oscillator signal generation unit is used to determine the second local oscillator frequency point based on the frequency band of the fixed intermediate frequency band signal; and to generate the second local oscillator signal based on the second local oscillator frequency point and the first clock signal. The second mixer circuit is used to mix the second local oscillator signal and the filtered fixed intermediate frequency band signal to obtain a low intermediate frequency signal.
[0009] According to the high-speed frequency hopping device provided by the present invention, the high-speed frequency hopping module further includes a first signal splitting and combining unit and a digitally controlled attenuation circuit: The first signal splitting and combining unit is used to split, combine, amplify, and distribute the power of multiple initial beacon signals to obtain the beacon signal after power distribution. The numerically controlled attenuation circuit is used to adjust the gain of the beacon signal after power distribution to obtain the beacon signal.
[0010] The high-speed frequency hopping device provided by the present invention further includes a radio frequency front-end processing module, which includes a front-end frequency hopping unit and a second signal splitting and combining unit. The front-end frequency hopping unit is used to generate the third local oscillator signal, and the input radio frequency signal is down-converted based on the third local oscillator signal to obtain the intermediate frequency input signal. The second signal splitting and combining unit is used to amplify and filter the intermediate frequency input signal to obtain the filtered intermediate frequency input signal. It then splits and combines the multiple filtered intermediate frequency input signals to obtain the initial beacon signal.
[0011] According to the high-speed frequency hopping device provided by the present invention, the front-end frequency hopping unit includes a front-end amplification and filtering unit, a front-end local oscillator signal generation unit and a front-end mixing circuit, wherein the front-end mixing circuit is connected to the front-end amplification and filtering unit and the front-end local oscillator signal generation unit respectively. The front-end amplification and filtering unit is used to amplify and filter the input radio frequency signal to obtain the filtered input radio frequency signal; The front-end local oscillator signal generation unit is used to determine the third local oscillator frequency based on the frequency band of the input radio frequency signal; and to generate the third local oscillator signal based on the third local oscillator frequency and the second clock signal. The front-end mixer circuit is used to mix the third local oscillator signal and the filtered input RF signal to obtain the intermediate frequency input signal.
[0012] According to the high-speed frequency hopping device provided by the present invention, the high-speed frequency hopping module further includes a third amplification and filtering unit and a filter selection unit: The third amplification and filtering unit is used to filter and amplify the low-intermediate frequency signal to obtain the amplified low-intermediate frequency signal; The filter selection unit is used to select the filter channel and filter the amplified low-IF signal based on the selected filter channel to obtain a selectively filtered low-IF signal.
[0013] According to the high-speed frequency hopping device provided by the present invention, the filter selection unit includes a broadband intermediate frequency filter circuit, a first radio frequency switch circuit, a narrowband intermediate frequency filter circuit, and a second radio frequency switch circuit. The first RF switch circuit and the second RF switch circuit are used to switch between selecting a broadband intermediate frequency filter circuit and a narrowband intermediate frequency filter circuit.
[0014] The high-speed frequency hopping device provided by the present invention further includes a baseband signal processing module, which includes a low-intermediate frequency signal filtering circuit, an analog-to-digital conversion circuit, and a signal processing circuit. The low-intermediate frequency (IF) signal filtering circuit is used to filter the low-intermediate frequency (IF) signal to obtain the filtered IF signal. The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the filtered low-intermediate frequency signal to obtain the converted low-intermediate frequency signal. The signal processing circuit is used to acquire the intensity of the converted low-intermediate frequency signal and to achieve beam tracking based on the acquired intensity change information.
[0015] The present invention also provides a high-speed frequency hopping method applied to any of the above-mentioned high-speed frequency hopping devices, comprising: A first local oscillator signal matching the beacon signal is generated, and the beacon signal is down-converted based on the first local oscillator signal to obtain a fixed intermediate frequency band signal; A second local oscillator signal is generated to match the fixed intermediate frequency band signal. The fixed intermediate frequency band signal is down-converted based on the second local oscillator signal to obtain a low intermediate frequency signal. The low intermediate frequency signal is used for beam tracking.
[0016] The high-speed frequency hopping device and method provided by this invention include a high-speed frequency hopping module, which comprises a first-stage high-speed frequency hopping unit and a second-stage high-speed frequency hopping unit. The first-stage high-speed frequency hopping unit generates a first local oscillator signal matching the beacon signal, and performs down-conversion processing on the beacon signal based on the first local oscillator signal to obtain a fixed intermediate frequency band signal. The second-stage high-speed frequency hopping unit generates a second local oscillator signal matching the fixed intermediate frequency band signal, and performs further down-conversion processing on the fixed intermediate frequency band signal based on the second local oscillator signal to obtain a low intermediate frequency signal. The low intermediate frequency signal is used for beam tracking. This invention achieves preliminary screening of spurious signals and image frequency signals by performing initial down-conversion processing on the beacon signal through the first-stage high-speed frequency hopping unit. It achieves secondary screening of spurious signals and image frequency signals by performing further down-conversion processing on the beacon signal through the second-stage high-speed frequency hopping unit. By performing two down-conversion processes on the beacon signal, this invention improves the accuracy and precision of spurious signal and image frequency signal screening, and enhances the anti-interference capability of beacon tracking. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the high-speed frequency hopping module provided by the present invention.
[0019] Figure 2 This is a schematic diagram of the structure of the radio frequency front-end processing module provided by the present invention.
[0020] Figure 3 This is a schematic diagram of the baseband signal processing module provided by the present invention.
[0021] Figure 4 This is a schematic diagram of the high-speed frequency hopping device provided by the present invention.
[0022] Figure 5 This is a flowchart illustrating the high-speed frequency hopping method provided by the present invention. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only 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 creative effort are within the scope of protection of this invention.
[0024] The following is combined Figures 1 to 5 The high-speed frequency hopping device and high-speed frequency hopping method of the present invention are described.
[0025] Figure 1 This is a schematic diagram of the high-speed frequency hopping device provided by the present invention. A high-speed frequency hopping device includes: a high-speed frequency hopping module, the high-speed frequency hopping module including a first-stage high-speed frequency hopping unit and a second-stage high-speed frequency hopping unit; The first-stage high-speed frequency hopping unit is used to generate a first local oscillator signal that matches the beacon signal. Based on the first local oscillator signal, the beacon signal is down-converted to obtain a fixed intermediate frequency band signal. The second-stage high-speed frequency hopping unit is used to generate a second local oscillator signal that matches the fixed intermediate frequency band signal. Based on the second local oscillator signal, the fixed intermediate frequency band signal is down-converted to obtain a low intermediate frequency signal. The low intermediate frequency signal is used for beam tracking.
[0026] The beacon signal includes the preprocessed initial beacon signal. Optionally, the initial beacon signal includes received L-band, S-band, or UHF band signals. The frequency range of L-band and S-band signals is 1-4 GHz. The frequency range of UHF band signals is 400-450 MHz.
[0027] Optionally, the initial beacon signal includes the input radio frequency signal (or satellite band signal) processed by the radio frequency front-end module. For example, when the received input radio frequency signal is a Ku-band signal or a Ka-band signal, the Ku-band signal or Ka-band signal is input to the radio frequency front-end module to obtain the initial beacon signal output by the radio frequency front-end module. The frequency range of the Ku-band signal and the Ka-band signal includes 8-40 GHz.
[0028] The first-stage high-speed frequency hopping unit and the second-stage high-speed frequency hopping unit are communicatively connected. The beacon signal is input into the high-speed frequency hopping module. The first-stage high-speed frequency hopping unit generates a first local oscillator signal that matches the beacon information, and performs initial down-conversion processing on the beacon signal based on the first local oscillator signal to obtain a fixed intermediate frequency band signal.
[0029] A fixed intermediate frequency (IF) signal is input to the second-stage high-speed frequency hopping unit. The first-stage high-speed frequency hopping unit generates a second local oscillator (LO) signal that matches the fixed IF signal, and performs a second down-conversion process on the fixed IF signal based on the second LO signal to obtain a low-IF signal. The low-IF signal has a lower frequency than the fixed IF signal.
[0030] Furthermore, the high-speed frequency hopping module and the baseband signal processing module are communicatively connected. The low-IF signal, output from the high-speed frequency hopping module, is input to the baseband signal processing module. The baseband signal processing module performs analog-to-digital conversion (ADC) and signal processing on the low-IF signal, acquiring its intensity variation information. This acquired intensity variation information provides a precise pointing reference for the beam tracking module, thus enabling beam tracking of the phased array antenna.
[0031] The high-speed frequency hopping device provided in this invention includes a high-speed frequency hopping module, which comprises a first-stage high-speed frequency hopping unit and a second-stage high-speed frequency hopping unit. The first-stage high-speed frequency hopping unit generates a first local oscillator signal matching the beacon signal, and performs down-conversion processing on the beacon signal based on the first local oscillator signal to obtain a fixed intermediate frequency band signal. The second-stage high-speed frequency hopping unit generates a second local oscillator signal matching the fixed intermediate frequency band signal, and performs further down-conversion processing on the fixed intermediate frequency band signal based on the second local oscillator signal to obtain a low intermediate frequency signal. The low intermediate frequency signal is used for beam tracking. This invention achieves preliminary screening of spurious signals and image frequency signals by performing initial down-conversion processing on the beacon signal using the first-stage high-speed frequency hopping unit. It achieves secondary screening of spurious signals and image frequency signals by performing further down-conversion processing on the beacon signal using the second-stage high-speed frequency hopping unit. By performing two down-conversion processes on the beacon signal, this invention improves the accuracy and precision of spurious signal and image frequency signal screening, and enhances the anti-interference capability of beacon tracking.
[0032] Furthermore, by performing two down-conversion processes on the beacon signal, compared to a single down-conversion process, the present invention can convert the beacon signal into a lower low-IF signal, thereby further reducing the power consumption of subsequent processing of the low-IF signal.
[0033] Optionally, the high-speed frequency hopping module includes three or more high-speed frequency hopping units. Multiple high-speed frequency hopping units perform multi-stage down-conversion processing on the beacon signal to obtain the final low-IF signal.
[0034] Based on the above embodiments, the first-stage high-speed frequency hopping unit includes a first amplification and filtering unit, a first local oscillator signal generation unit, and a first mixing circuit; the first mixing circuit is connected to the first amplification and filtering unit and the first local oscillator signal generation unit respectively. The first amplification and filtering unit is used to amplify and filter the beacon signal to obtain the filtered beacon signal; The first local oscillator signal generation unit is used to determine the first local oscillator frequency based on the frequency band of the beacon signal; and to generate the first local oscillator signal based on the first local oscillator frequency and the first clock signal. The first mixer circuit is used to mix the first local oscillator signal and the filtered beacon signal to obtain a fixed intermediate frequency band signal.
[0035] The first-stage high-speed frequency hopping unit includes a first amplification and filtering unit, a first local oscillator signal generation unit, and a first mixing circuit; the first mixing circuit is connected to the first amplification and filtering unit and the first local oscillator signal generation unit respectively.
[0036] like Figure 1 As shown, the first amplification and filtering unit includes a first intermediate frequency (IF) amplifier circuit and a first IF filter circuit connected in sequence. The first IF amplifier circuit is used to stably amplify a specific IF signal in the beacon signal at a high rate to obtain the amplified beacon signal. The first IF filter circuit is used to filter the amplified beacon signal, accurately selecting the required signal and filtering out all unwanted interference signals to obtain the filtered beacon signal. The filtered beacon signal is input to the first mixer circuit.
[0037] like Figure 1 As shown, the first local oscillator signal generation unit includes a first local oscillator filter circuit and a first local oscillator circuit.
[0038] The first local oscillator signal generation unit determines the first local oscillator frequency point based on the frequency band of the beacon signal. Optionally, a first mapping relationship between the frequency bands of each beacon signal and each designated first local oscillator frequency point is pre-constructed. The first mapping relationship is queried based on the frequency band of the beacon signal, and the first local oscillator frequency point is determined based on the queried designated first local oscillator frequency point.
[0039] Optionally, the first local frequency point is determined based on the beacon signal's frequency band and the historical usage of the first local frequency point. The historical usage of the first local frequency point includes its usage within a short period (or a specified time period). When multiple specified first local frequency points are found, those used within a short period are filtered out based on the historical usage, leaving the remaining specified first local frequency points. The first local frequency point is then determined based on these remaining specified first local frequency points.
[0040] The first local oscillator frequency is input to the first local oscillator circuit. The first local oscillator circuit receives the first clock signal output from the second RF power divider circuit. The first local oscillator filter circuit generates an initial first local oscillator signal based on the first local oscillator frequency and the first clock signal. The initial first local oscillator signal is then filtered by the first local oscillator filter circuit to obtain the final first local oscillator signal. The first local oscillator signal is then input to the first mixer circuit.
[0041] The first mixer circuit mixes the first local oscillator signal and the filtered beacon signal to obtain a fixed intermediate frequency band signal.
[0042] Furthermore, the high-speed frequency hopping module uses a phase-locked loop (PLL) chip with high-speed frequency hopping to generate the first clock signal, with a locking time of less than 30µs and a frequency hopping rate of more than 200 million hops / s.
[0043] This invention determines the first local oscillator frequency (LOF) based on the beacon signal's frequency band, enabling targeted down-conversion processing for different beacon signal frequency bands and increasing the range of beacon signal frequency bands that can be processed. For example, the beacon signal frequency bands that this invention can process include Ku, Ka, L, S, and UHF bands. Furthermore, by simultaneously referencing the beacon signal's frequency band and historical usage of the first LEF frequency, the invention determines the first LEF frequency, allowing for flexible configuration of different first LEF signals and improving the flexibility of using a specified first LEF frequency.
[0044] Based on the above embodiments, the second-stage high-speed frequency hopping unit includes a second amplification and filtering unit, a second local oscillator signal generation unit, and a second mixing circuit; the second mixing circuit is connected to the second amplification and filtering unit and the second local oscillator signal generation unit respectively. The second amplification and filtering unit is used to amplify and filter the fixed intermediate frequency band signal to obtain the filtered fixed intermediate frequency band signal. The second local oscillator signal generation unit is used to determine the second local oscillator frequency point based on the frequency band of the fixed intermediate frequency band signal; and to generate the second local oscillator signal based on the second local oscillator frequency point and the first clock signal. The second mixer circuit is used to mix the second local oscillator signal and the filtered fixed intermediate frequency band signal to obtain a low intermediate frequency signal.
[0045] The second-stage high-speed frequency hopping unit includes a second amplification and filtering unit, a second local oscillator signal generation unit, and a second mixer circuit. The second mixer circuit is connected to both the second amplification and filtering unit and the second local oscillator signal generation unit.
[0046] like Figure 1As shown, the second amplification and filtering unit includes a second intermediate frequency (IF) filter circuit, a second IF amplifier circuit, and a third IF filter circuit connected in sequence. The second IF filter circuit is connected to the first mixer circuit. A fixed IF band signal is input to the second IF filter circuit. The second IF filter circuit performs initial filtering on the fixed IF band signal, accurately selecting the desired signal and filtering out unwanted interference signals to obtain a fixed IF band signal after initial filtering. The fixed IF band signal after initial filtering is input to the second IF amplifier circuit for amplification to obtain an amplified fixed IF band signal. The amplified fixed IF band signal is input to the third IF filter circuit, and after filtering, a final filtered fixed IF band signal is obtained. The filtered fixed IF band signal is input to the second mixer circuit. This invention achieves sufficient amplification and filtering of a fixed IF band signal through the second IF filter circuit, the second IF amplifier circuit, and the third IF filter circuit.
[0047] like Figure 1 As shown, the second local oscillator signal generation unit includes a second local oscillator circuit and a second local oscillator filter circuit.
[0048] The second local oscillator signal generation unit determines the second local oscillator frequency point based on the frequency band of the fixed intermediate frequency band signal. Optionally, a second mapping relationship between the frequency bands of each fixed intermediate frequency band signal and each specified second local oscillator frequency point is pre-constructed. The second mapping relationship is queried based on the frequency band of the fixed intermediate frequency band signal, and the second local oscillator frequency point is determined based on the queried specified second local oscillator frequency point.
[0049] Optionally, the second local oscillator (LOO) frequency is determined based on the fixed intermediate frequency band signal and the historical usage of the second OEO frequency. The historical OEO usage includes usage within a short period (or a specified time period). When multiple specified OEO frequencies are found, those used within a short period are filtered out based on the historical OEO usage, leaving the remaining specified OEO frequencies. The final OEO frequency is then determined based on these remaining specified OEO frequencies.
[0050] The second local oscillator frequency is input to the second local oscillator circuit. The second local oscillator circuit receives the first clock signal output from the second RF power divider circuit. Based on the second local oscillator frequency and the first clock signal, the second local oscillator circuit generates an initial second local oscillator signal. The initial second local oscillator signal is input to the second local oscillator filter circuit for filtering to obtain the final second local oscillator signal. The second local oscillator signal is then input to the second mixer circuit.
[0051] The second mixer circuit mixes the second local oscillator signal and the filtered fixed intermediate frequency band signal to obtain a low intermediate frequency signal.
[0052] This invention determines the second local oscillator frequency (LON) based on the fixed intermediate frequency (IF) band signal. This allows for targeted down-conversion processing of fixed IF band signals across different frequency ranges, thus increasing the range of IF band signals that can be processed. Furthermore, by simultaneously referencing the fixed IF band signal and historical usage of the second LON frequency, the invention determines the second LON frequency, enabling flexible configuration of different second LO signals and improving the flexibility of using a specified second LON frequency.
[0053] Based on the above embodiments, the high-speed frequency hopping module further includes a first signal splitting and combining unit and a digitally controlled attenuation circuit: The first signal splitting and combining unit is used to split, combine, amplify, and distribute the power of multiple initial beacon signals to obtain the beacon signal after power distribution. The numerically controlled attenuation circuit is used to adjust the gain of the beacon signal after power distribution to obtain the beacon signal.
[0054] like Figure 1 As shown, the high-speed frequency hopping module also includes a first signal splitting and combining unit and a digitally controlled attenuation circuit. The first signal splitting and combining unit includes a signal splitting and combining circuit, a fifth intermediate frequency amplifier circuit, and a first radio frequency power divider circuit connected in sequence. The first radio frequency power divider circuit is connected to the digitally controlled attenuation circuit. The digitally controlled attenuation circuit is connected to the first-stage high-speed frequency hopping unit. Optionally, the digitally controlled attenuation circuit is connected to the first intermediate frequency amplifier circuit of the first-stage high-speed frequency hopping unit.
[0055] Multiple initial beacon signals are input to a signal splitter / combiner circuit, which splits and combines the multiple initial beacon signals to obtain a split-combined beacon signal. This split-combined beacon signal is then amplified by a fifth intermediate frequency amplifier circuit to obtain an amplified split-combined beacon signal. The amplified split-combined beacon signal is then input to a first radio frequency power divider circuit for power distribution to obtain a power-distributed beacon signal. The power-distributed beacon signal is then input to a digitally controlled attenuation circuit for gain adjustment to obtain the final beacon signal. Finally, the beacon signal is input to the first-stage high-speed frequency hopping unit.
[0056] Optionally, a DC voltage is input to the signal splitting and combining circuit of the high-speed frequency hopping module to obtain the DC voltage after splitting and combining, so as to power the various circuits of the high-speed frequency hopping module.
[0057] This invention uses a first signal splitting and combining unit and a digitally controlled attenuation circuit to split, combine, amplify, distribute power, and adjust the gain of multiple initial beacon signals, thereby improving the anti-interference capability during the reception and processing of multiple initial beacon signals.
[0058] Based on the above embodiments, the high-speed frequency hopping module further includes a third amplification and filtering unit and a filter selection unit: The third amplification and filtering unit is used to filter and amplify the low-intermediate frequency signal to obtain the amplified low-intermediate frequency signal; The filter selection unit is used to select the filter channel and filter the amplified low-IF signal based on the selected filter channel to obtain a selectively filtered low-IF signal.
[0059] The high-speed frequency hopping module also includes a third amplification and filtering unit and a filter selection unit. The third amplification and filtering unit is connected to the filter selection unit. The low-intermediate frequency signal is input to the third amplification and filtering unit.
[0060] like Figure 1 As shown, the third amplification and filtering unit includes a fourth intermediate frequency (IF) filter circuit and a third IF amplifier circuit connected in sequence. The low-IF signal is input to the fourth IF filter circuit, and after filtering, a filtered low-IF signal is obtained. The filtered low-IF signal is then input to the third IF amplifier circuit for amplification, resulting in an amplified low-IF signal.
[0061] The filter selection unit contains different filter channels. Based on actual needs, the filter selection unit selects the matching filter channel to filter the amplified low-IF signal, obtaining a selectively filtered low-IF signal.
[0062] Furthermore, the high-speed frequency hopping module also includes a fourth intermediate frequency (IF) amplifier circuit. This fourth IF amplifier circuit is connected to the second radio frequency (RF) switching circuit. The selectively filtered low-IF signal is input to the fourth IF amplifier circuit for amplification, obtaining the final processed target low-IF signal. The target low-IF signal is then input to the baseband signal processing module for processing to achieve beam tracking.
[0063] This invention uses a filter selection unit to select a matching filter channel to filter the amplified low-IF signal, thereby obtaining a selectively filtered low-IF signal and improving the anti-interference capability of the high-speed frequency hopping module.
[0064] Based on the above embodiments, the filter selection unit includes a broadband intermediate frequency filter circuit, a first radio frequency switch circuit, a narrowband intermediate frequency filter circuit, and a second radio frequency switch circuit. The first RF switch circuit and the second RF switch circuit are used to switch between selecting a broadband intermediate frequency filter circuit and a narrowband intermediate frequency filter circuit.
[0065] like Figure 1 As shown, the filter selection unit includes a broadband intermediate frequency (IF) filter circuit, a first radio frequency (RF) switch circuit, a narrowband IF filter circuit, and a second RF switch circuit. The first RF switch circuit is connected in parallel to the broadband IF filter circuit and the narrowband IF filter circuit. The second RF switch circuit is also connected in parallel to the broadband IF filter circuit and the narrowband IF filter circuit. The first RF switch circuit is connected to a third amplification and filtering unit. Optionally, the first RF switch circuit is connected to the third amplification circuit of the third amplification and filtering unit. By setting the switching states of the first and second RF switch circuits, the selection can be switched between the broadband IF filter circuit and the narrowband IF filter circuit.
[0066] The amplified low-IF signal is input to the first RF switching circuit. Depending on the actual needs, the amplified low-IF signal can be selectively input to a broadband IF filter circuit for filtering, or selectively input to a narrowband IF filter circuit for filtering, to obtain a selectively filtered low-IF signal.
[0067] Based on the first and second RF switching circuits, this invention enables flexible selection of broadband intermediate frequency (IF) filter circuits and narrowband IF filter circuits, allowing for the selection of a matching filter channel according to actual needs.
[0068] Based on the above embodiments, the high-speed frequency hopping device further includes a radio frequency front-end processing module, which includes a front-end frequency hopping unit and a second signal splitting and combining unit. The front-end frequency hopping unit is used to generate the third local oscillator signal, and the input radio frequency signal is down-converted based on the third local oscillator signal to obtain the intermediate frequency input signal. The second signal splitting and combining unit is used to amplify and filter the intermediate frequency input signal to obtain the filtered intermediate frequency input signal. It then splits and combines the multiple filtered intermediate frequency input signals to obtain the initial beacon signal.
[0069] The high-speed frequency hopping device also includes an RF front-end processing module. The RF front-end processing module includes a front-end frequency hopping unit and a second signal splitting / combining unit. The front-end frequency hopping unit is connected to the second signal splitting / combining unit.
[0070] The RF front-end processing module is used to process high-frequency input RF signals (satellite band signals) to convert them into initial beacon signals that can be processed by the high-speed frequency hopping module. For example, when the input RF signal is a Ku-band or Ka-band signal, the RF front-end processing module needs to convert it into an initial beacon signal that can be processed by the high-speed frequency hopping module.
[0071] The front-end frequency hopping unit generates a third local oscillator signal, and performs down-conversion processing on the input RF signal based on the third local oscillator signal to obtain the intermediate frequency (IF) input signal. The IF input signal is then input to the second signal combining / splitting unit.
[0072] like Figure 2As shown, the second signal combining / splitting unit includes a third front-end filter circuit, a second front-end amplifier circuit, a fourth front-end filter circuit, and a front-end signal combining / splitting circuit connected in sequence. The third front-end filter circuit performs initial filtering on the intermediate frequency (IF) input signal to obtain the initially filtered IF input signal. The initially filtered IF input signal is then input to the second front-end amplifier circuit for amplification to obtain the amplified IF input signal. The amplified IF input signal is then input to the fourth front-end filter circuit for further filtering to obtain the second-filtered IF input signal. The second-filtered IF input signal is then input to the front-end signal combining / splitting circuit for combining / splitting to obtain the initial beacon signal. The initial beacon signal is then input to the signal combining / splitting circuit of the high-speed frequency hopping module for combining / splitting and subsequent down-conversion processing.
[0073] Furthermore, the DC voltage is input to the front-end signal splitting and combining circuit to obtain the DC voltage after splitting and combining, so as to power the various circuits of the RF front-end processing module.
[0074] This invention, by performing down-conversion and splitting / combining on the input radio frequency signal, can convert the high-frequency input radio frequency signal into an initial beacon signal that can be processed by the high-speed frequency hopping module. This increases the range of beacon signals that the high-speed frequency hopping device can process, enabling the high-speed frequency hopping device to perform down-conversion on beacon signals of various frequency bands, thereby achieving beam tracking of beacon signals of various frequency bands.
[0075] Based on the above embodiments, the front-end frequency hopping unit includes a front-end amplification and filtering unit, a front-end local oscillator signal generation unit, and a front-end mixing circuit. The front-end mixing circuit is connected to the front-end amplification and filtering unit and the front-end local oscillator signal generation unit, respectively. The front-end amplification and filtering unit is used to amplify and filter the input radio frequency signal to obtain the filtered input radio frequency signal; The front-end local oscillator signal generation unit is used to determine the third local oscillator frequency based on the frequency band of the input radio frequency signal; and to generate the third local oscillator signal based on the third local oscillator frequency and the second clock signal. The front-end mixer circuit is used to mix the third local oscillator signal and the filtered input RF signal to obtain the intermediate frequency input signal.
[0076] The front-end frequency hopping unit includes a front-end amplification and filtering unit, a front-end local oscillator signal generation unit, and a front-end mixing circuit. The front-end mixing circuit is connected to the front-end amplification and filtering unit and the front-end local oscillator signal generation unit, respectively.
[0077] like Figure 2As shown, the front-end amplification and filtering unit includes a first front-end filter circuit, a first front-end amplification circuit, and a second front-end filter circuit connected in sequence. The second front-end filter circuit is connected to the front-end mixer circuit. The input RF signal is input to the first front-end filter circuit for initial filtering, resulting in a pre-filtered input RF signal. The pre-filtered input RF signal is then input to the first front-end amplification circuit for amplification, resulting in an amplified input RF signal. The amplified input RF signal is then input to the second front-end filter circuit for further filtering, resulting in the final filtered input RF signal. The filtered input RF signal is then input to the front-end mixer circuit.
[0078] like Figure 2 As shown, the front-end local oscillator signal generation unit includes a third local oscillator circuit and a third local oscillator filter circuit.
[0079] The front-end local oscillator signal generation unit determines the third local oscillator frequency point based on the frequency band of the input RF signal. Optionally, a third mapping relationship between the frequency band of each input RF signal and each specified third local oscillator frequency point is pre-constructed. The third mapping relationship is queried based on the frequency band of the input RF signal, and the third local oscillator frequency point is determined based on the queried specified third local oscillator frequency point.
[0080] Optionally, the third local oscillator (LoU) frequency is determined based on the frequency band of the input RF signal and the historical usage of the third LoU frequency. The historical LoU usage includes the usage of the third LoU frequency over a short period (or a specified time period). When multiple specified LoU frequencies are found, those used in the short term are filtered out based on the historical LoU usage, leaving the remaining specified LoU frequencies. The third LoU frequency is then determined based on these remaining specified LoU frequencies.
[0081] Furthermore, the initial clock signal is input to the front-end signal splitter / splitter circuit for splitting and combining to obtain the second clock signal. The second clock signal is then input to the third local oscillator circuit after passing through a clock amplification and filtering circuit. Optionally, the second clock signal may include a 100MHz clock signal.
[0082] Furthermore, the second clock signal is input to the signal splitter / combiner circuit of the high-speed frequency hopping module for splitting and combining, and then input to the second RF power divider circuit for power distribution to generate the first clock signal.
[0083] The third local oscillator frequency is input to the third local oscillator circuit. The third local oscillator circuit generates an initial third local oscillator signal based on the third local oscillator frequency and the second clock signal. This initial third local oscillator signal is then filtered by the third local oscillator filter circuit to obtain the final third local oscillator signal. Finally, the third local oscillator signal is input to the front-end mixer circuit.
[0084] The front-end mixer circuit mixes the third local oscillator signal and the filtered input RF signal to obtain the intermediate frequency input signal.
[0085] The front-end mixer circuit is connected to the third front-end filter circuit. The intermediate frequency input signal is input to the third front-end filter circuit.
[0086] This invention determines the third local oscillator frequency based on the frequency band of the input radio frequency signal, enabling targeted down-conversion processing for different input radio frequency signal frequency bands, thereby increasing the range of processable input radio frequency signals.
[0087] Based on the above embodiments, the high-speed frequency hopping device further includes a baseband signal processing module, which includes a low-intermediate frequency signal filtering circuit, an analog-to-digital conversion circuit, and a signal processing circuit. The low-intermediate frequency (IF) signal filtering circuit is used to filter the low-intermediate frequency (IF) signal to obtain the filtered IF signal. The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the filtered low-intermediate frequency signal to obtain the converted low-intermediate frequency signal. The signal processing circuit is used to acquire the intensity of the converted low-intermediate frequency signal and to achieve beam tracking based on the acquired intensity change information.
[0088] like Figure 3 As shown, the high-speed frequency hopping device also includes a baseband signal processing module, which includes a low-intermediate frequency signal filtering circuit, an analog-to-digital conversion circuit, and a signal processing circuit connected in sequence.
[0089] The low-IF signal is input to a low-IF signal filtering circuit for filtering, resulting in a filtered low-IF signal. The filtered low-IF signal is then input to an analog-to-digital converter for analog-to-digital conversion, resulting in a converted low-IF signal. This converted low-IF signal is then input to a signal processing circuit for signal strength acquisition. The baseband signal processing module uses the acquired strength variation information to perform beam tracking.
[0090] Optionally, the selectively filtered low-IF signal or the target low-IF signal is input to the baseband signal processing module, and then filtered, converted from analog to digital and acquired in sequence through the low-IF signal filtering circuit, the analog-to-digital conversion circuit and the signal processing circuit. Beam tracking is then performed based on the acquired intensity change information.
[0091] Furthermore, the baseband signal processing module also includes a power conversion circuit. The power conversion circuit converts the input current into a current that the baseband signal processing module can use to power the various circuits of the baseband signal processing module.
[0092] This invention achieves accurate acquisition of intensity change information by filtering, analog-to-digital conversion, and signal strength acquisition of low-to-medium frequency signals, providing an accurate pointing reference for beam tracking and facilitating accurate beam tracking of phased array antennas.
[0093] This invention possesses strong portability and versatility, allowing for flexible adjustments based on the specific beacon signal characteristics of satellites. Only minor in-situ hardware adjustments and software configuration are required to meet actual needs. The high-speed frequency hopping device of this invention is highly versatile and can meet the current requirements for acquiring satellite beacon signals in most Ku-band, Ka-band, L-band, S-band, and UHF bands.
[0094] This invention employs a multi-stage superheterodyne down-conversion processing method, improving the spurious emission and image frequency suppression capabilities of the high-speed frequency hopping device. The high-speed frequency hopping device of this invention is compatible with both broadband and narrowband intermediate frequency (IF) filter circuits, allowing for the selection of a matching IF filter circuit based on actual needs, thus enhancing the applicability of the high-speed frequency hopping device. The high-speed frequency hopping performance of the high-speed frequency hopping device of this invention meets the frequency hopping requirements of all current domestic satellites, improving the anti-interference capability of the high-speed frequency hopping device.
[0095] like Figure 4 As shown, the high-speed frequency hopping device provided by the present invention includes an RF front-end module, a high-speed frequency hopping module, and a baseband signal processing module. The baseband signal processing module is connected to the RF front-end module and the high-speed frequency hopping module.
[0096] like Figure 5 As shown, the present invention also provides a high-speed frequency hopping method, including steps S100 to S200, the specific steps of which are as follows.
[0097] S100: Generate a first local oscillator signal that matches the beacon signal, and perform down-conversion processing on the beacon signal based on the first local oscillator signal to obtain a fixed intermediate frequency band signal.
[0098] The first local oscillator frequency matching the beacon signal is determined, and a first local oscillator signal matching the beacon signal is generated. The first local oscillator signal and the beacon signal are mixed to achieve down-conversion processing of the beacon signal. Based on the mixing result, a fixed intermediate frequency band signal is obtained.
[0099] S200: Generate a second local oscillator signal that matches the fixed intermediate frequency band signal, and perform a second down-conversion process on the fixed intermediate frequency band signal based on the second local oscillator signal to obtain a low intermediate frequency signal.
[0100] Low-to-intermediate frequency signals are used for beam tracking.
[0101] A second local oscillator frequency matching the fixed intermediate frequency band signal is determined, and a second local oscillator signal matching the fixed intermediate frequency band signal is generated. The second local oscillator signal and the fixed intermediate frequency band signal are mixed to achieve a second down-conversion of the fixed intermediate frequency band signal. Based on the mixing result, the low intermediate frequency signal is obtained.
[0102] The high-speed frequency hopping method provided in this invention generates a first local oscillator signal matching the beacon signal, performs down-conversion processing on the beacon signal based on the first local oscillator signal to obtain a fixed intermediate frequency band signal, generates a second local oscillator signal matching the fixed intermediate frequency band signal, and performs down-conversion processing on the fixed intermediate frequency band signal based on the second local oscillator signal to obtain a low intermediate frequency signal; the low intermediate frequency signal is used for beam tracking. This invention performs initial down-conversion processing on the beacon signal using a first-stage high-speed frequency hopping unit, achieving preliminary filtering of spurious signals and image frequency signals. A second-stage high-speed frequency hopping unit performs a second down-conversion on the beacon signal, achieving secondary filtering of spurious signals and image frequency signals. By performing two down-conversion processes on the beacon signal, this invention improves the accuracy and precision of filtering spurious signals and image frequency signals, and enhances the anti-interference capability of beacon tracking.
[0103] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0104] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A high-speed frequency hopping device, characterized in that, include: A high-speed frequency hopping module, comprising a first-stage high-speed frequency hopping unit and a second-stage high-speed frequency hopping unit; The first-stage high-speed frequency hopping unit is used to generate a first local oscillator signal that matches the beacon signal, and to perform down-conversion processing on the beacon signal based on the first local oscillator signal to obtain a fixed intermediate frequency band signal; The second-stage high-speed frequency hopping unit is used to generate a second local oscillator signal that matches the fixed intermediate frequency band signal, and to perform down-conversion processing on the fixed intermediate frequency band signal based on the second local oscillator signal to obtain a low intermediate frequency signal; the low intermediate frequency signal is used for beam tracking.
2. The high-speed frequency hopping device according to claim 1, characterized in that, The first-stage high-speed frequency hopping unit includes a first amplification and filtering unit, a first local oscillator signal generation unit, and a first mixer circuit; the first mixer circuit is connected to both the first amplification and filtering unit and the first local oscillator signal generation unit. The first amplification and filtering unit is used to amplify and filter the beacon signal to obtain a filtered beacon signal; The first local oscillator signal generation unit is used to determine the first local oscillator frequency based on the frequency band of the beacon signal; and to generate the first local oscillator signal based on the first local oscillator frequency and the first clock signal. The first mixer circuit is used to mix the first local oscillator signal and the filtered beacon signal to obtain the fixed intermediate frequency band signal.
3. The high-speed frequency hopping device according to claim 1, characterized in that, The second-stage high-speed frequency hopping unit includes a second amplification and filtering unit, a second local oscillator signal generation unit, and a second mixer circuit; the second mixer circuit is connected to both the second amplification and filtering unit and the second local oscillator signal generation unit. The second amplification and filtering unit is used to amplify and filter the fixed intermediate frequency band signal to obtain a filtered fixed intermediate frequency band signal; The second local oscillator signal generation unit is used to determine the second local oscillator frequency point based on the frequency band of the fixed intermediate frequency band signal; and to generate the second local oscillator signal based on the second local oscillator frequency point and the first clock signal. The second mixer circuit is used to mix the second local oscillator signal and the filtered fixed intermediate frequency band signal to obtain the low intermediate frequency signal.
4. The high-speed frequency hopping device according to claim 1, characterized in that, The high-speed frequency hopping module also includes a first signal splitting and combining unit and a digitally controlled attenuation circuit: The first signal splitting and combining unit is used to split and combine multiple initial beacon signals, amplify and distribute power to obtain beacon signals after power distribution; The numerically controlled attenuation circuit is used to adjust the gain of the beacon signal after power distribution to obtain the beacon signal.
5. The high-speed frequency hopping device according to claim 1, characterized in that, It also includes a radio frequency front-end processing module, which comprises a front-end frequency hopping unit and a second signal combining / splitting unit: The front-end frequency hopping unit is used to generate a third local oscillator signal, and performs down-conversion processing on the input radio frequency signal based on the third local oscillator signal to obtain an intermediate frequency input signal. The second signal splitting and combining unit is used to amplify and filter the intermediate frequency input signal to obtain a filtered intermediate frequency input signal, and to split and combine multiple filtered intermediate frequency input signals to obtain an initial beacon signal.
6. The high-speed frequency hopping device according to claim 5, characterized in that, The front-end frequency hopping unit includes a front-end amplification and filtering unit, a front-end local oscillator signal generation unit, and a front-end mixing circuit. The front-end mixing circuit is connected to the front-end amplification and filtering unit and the front-end local oscillator signal generation unit, respectively. The front-end amplification and filtering unit is used to amplify and filter the input radio frequency signal to obtain a filtered input radio frequency signal; The front-end local oscillator signal generation unit is used to determine the third local oscillator frequency point based on the frequency band of the input radio frequency signal; and to generate the third local oscillator signal based on the third local oscillator frequency point and the second clock signal. The front-end mixer circuit is used to mix the third local oscillator signal and the filtered input radio frequency signal to obtain the intermediate frequency input signal.
7. The high-speed frequency hopping device according to claim 1, characterized in that, The high-speed frequency hopping module also includes a third amplification and filtering unit and a filter selection unit: The third amplification and filtering unit is used to filter and amplify the low-intermediate frequency signal to obtain an amplified low-intermediate frequency signal; The filter selection unit is used to select a filter channel and filter the amplified low-IF signal based on the selected filter channel to obtain a selectively filtered low-IF signal.
8. The high-speed frequency hopping device according to claim 7, characterized in that, The filtering selection unit includes a broadband intermediate frequency (IF) filter circuit, a first radio frequency (RF) switch circuit, a narrowband IF filter circuit, and a second RF switch circuit. The first RF switch circuit and the second RF switch circuit are used to switch between selecting the broadband intermediate frequency filter circuit or the narrowband intermediate frequency filter circuit.
9. The high-speed frequency hopping device according to claim 1, characterized in that, It also includes a baseband signal processing module, which comprises a low-intermediate frequency signal filtering circuit, an analog-to-digital conversion circuit, and a signal processing circuit. The low-intermediate frequency signal filtering circuit is used to filter the low-intermediate frequency signal to obtain a filtered low-intermediate frequency signal. The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the filtered low-intermediate frequency signal to obtain the converted low-intermediate frequency signal. The signal processing circuit is used to acquire the intensity of the converted low-to-medium frequency signal and to realize beam tracking based on the acquired intensity change information.
10. A high-speed frequency hopping method applied to the high-speed frequency hopping device as described in any one of claims 1-9, characterized in that, include: A first local oscillator signal matching the beacon signal is generated, and the beacon signal is down-converted based on the first local oscillator signal to obtain a fixed intermediate frequency band signal; A second local oscillator signal matching the fixed intermediate frequency band signal is generated, and the fixed intermediate frequency band signal is down-converted based on the second local oscillator signal to obtain a low intermediate frequency signal; the low intermediate frequency signal is used for beam tracking.