Ultra-wideband receiver capable of automatically identifying receiving frequency

Abstract

The utility model relates to an ultra-wideband receiver capable of automatically identifying receiving frequency, and relates to the technical field of communication. The input end of a frequency detection module receives a radio frequency signal, and the output end of the frequency detection module is connected with the input end of a main control module; the output end of the master control module is connected with the input end of the filtering assembly and the input end of the frequency conversion module. The input end of the filtering assembly is also used for receiving radio frequency signals, and the output end of the filtering assembly is connected with the input end of the frequency conversion module; the output end of the frequency conversion module is connected with the input end of the master control module. The frequency detection module automatically identifies the frequency of the received radio frequency signal; the main control module sends an instruction to the filtering assembly according to the frequency so as to select and pass through a specific signal frequency band, and calculates the local oscillation frequency according to the frequency; and then the frequency conversion module is used for mixing the local frequency and the processed radio frequency signal, so that the amplitude of the output intermediate frequency signal is kept constant, the subsequent circuit structure is simplified, and the dynamic range is optimized.

Description

Technical Field

[0001] The utility model relates to the field of communication technologies, and particularly to an ultra-wideband receiver for automatically identifying received frequencies. Background Art

[0002] With the rapid development of China's aerospace industry, various satellite communication devices have gradually matured, the application of satellite communication technologies has become increasingly widespread, and the used frequency bands have been continuously increasing. For different communication frequency bands, different types of receivers are used. Currently, the satellite communication frequency band has been extended to the KA band, which has a wider frequency band and faster rate, thus promoting the development of satellite communication ground stations. The performance of ground stations and their internal units and components has been continuously improved and is developing towards miniaturization, intelligence, and broadband compatibility. As one of the core key components of the satellite ground station system, the performance improvement of the receiver is particularly important.

[0003] However, some receivers on the market have the problem of a narrow operating frequency band, and even devices with high-frequency receiving capabilities can only operate in segments. In addition, these receivers usually lack signal tracking capabilities, can only detect known signals, have poor weak-signal extraction capabilities, low signal-to-noise ratios, and are prone to misjudging received signals. The current working mode of the receiver is: the antenna receives a known fixed radio frequency signal, and after passing through a filter and a low-noise amplifier, the signal is transmitted to the backend frequency conversion module and down-converted into an intermediate-frequency signal, and then after amplification and filtering, it is input into the baseband chip for modulation and demodulation processing.

[0004] The main problems of this technology are that the receiver can only receive signals within a known fixed frequency band range, and the received signal range is narrow. These problems limit the application range and flexibility of the receiver, and there is an urgent need for a new receiver technology that can solve these problems. Summary of the Utility Model

[0005] Based on this, in view of the above problems, it is necessary to provide an ultra-wideband receiver for automatically identifying ultra-wide frequencies, having an ultra-wide receiving frequency range, high sensitivity, and a high receiving dynamic range.

[0006] An ultra-wideband receiver for automatically identifying received frequencies includes: a frequency detection module, a filtering component, a main control module, and a frequency conversion module;

[0007] The input end of the frequency detection module receives a radio frequency signal, and the output end of the frequency detection module is connected to the input end of the main control module; the output end of the main control module is respectively connected to the input end of the filtering component and the input end of the frequency conversion module; the input end of the filtering component is also used to receive a radio frequency signal, and the output end of the filtering component is connected to the input end of the frequency conversion module; the output end of the frequency conversion module is connected to the input end of the main control module;

[0008] The frequency detection module is used to detect the frequency of the radio frequency signal and send the detection result to the main control module; the main control module determines the required frequency according to the detection result, controls the filtering component to select the corresponding signal frequency band, calculates the local oscillator frequency according to the required frequency, and sends the local oscillator frequency to the frequency conversion module; the filtering component processes the radio frequency signal and then sends it to the frequency conversion module; the frequency conversion module processes the received local oscillator frequency and the processed radio frequency signal, and outputs an intermediate frequency signal to the main control module for demodulation processing.

[0009] Furthermore, a low-noise amplifier is also provided at the input end of the frequency detection module and the input end of the filtering component;

[0010] After the received radio frequency signal is processed by the low-noise amplifier, it is respectively sent to the frequency detection module and the filtering component.

[0011] Furthermore, a frequency synthesizer is provided between the output end of the main control module and the input end of the frequency conversion module;

[0012] The main control module configures the frequency synthesizer according to the local oscillator frequency, and the configured frequency synthesizer processes the input local oscillator frequency and outputs a local oscillator signal; the frequency conversion module processes the received local oscillator signal and the processed radio frequency signal, and outputs an intermediate frequency signal.

[0013] Furthermore, a first variable gain amplification module is provided between the output end of the filtering component and the input end of the frequency conversion module;

[0014] After the filtering component processes the radio frequency signal and sends it to the first variable gain amplification module for gain adjustment, it is then sent to the frequency conversion module.

[0015] Furthermore, an intermediate frequency filtering and amplification module is provided between the output end of the frequency conversion module and the input end of the main control module;

[0016] The frequency conversion module sends the intermediate frequency signal to the intermediate frequency filtering and amplification module, and the intermediate frequency filtering and amplification module filters and amplifies the intermediate frequency signal and then sends it to the main control module.

[0017] Specifically, the intermediate frequency filtering and amplification module includes an intermediate frequency filter and an intermediate frequency amplifier;

[0018] The input end of the intermediate frequency filter is connected to the output end of the frequency conversion module, the output end of the intermediate frequency filter is connected to the input end of the intermediate frequency amplifier, and the output end of the intermediate frequency amplifier is connected to the input end of the main control module;

[0019] The intermediate-frequency filter filters the received intermediate-frequency signal and then sends it to the intermediate-frequency amplifier. The intermediate-frequency amplifier amplifies the filtered intermediate-frequency signal and then sends it to the main control module.

[0020] Further, a second variable gain amplification module is provided between the output end of the intermediate-frequency filter and the input end of the intermediate-frequency amplifier;

[0021] The intermediate-frequency filter filters the received intermediate-frequency signal and then sends it to the second variable gain amplification module for gain adjustment. The second variable gain amplification module adjusts the gain of the filtered intermediate-frequency signal and then sends it to the intermediate-frequency amplifier.

[0022] Further, a power detection module is also provided;

[0023] The input end of the power detection module is connected to the output end of the intermediate-frequency amplifier, and the output end of the power detection module is respectively connected to the input ends of the first variable gain amplification module and the second variable gain amplification module;

[0024] The power detection module detects the power of the intermediate-frequency signal processed by the intermediate-frequency filter amplification module, and outputs a corresponding control voltage according to the detection result to adjust the gains of the first variable gain amplification module and the second variable gain amplification module.

[0025] Specifically, the power detection module adopts a large dynamic range detector.

[0026] Specifically, the filtering component includes a plurality of filters with high rectangularity coefficients and is cascaded by a switched filter bank.

[0027] Compared with the prior art, the ultra-wideband receiver for automatically identifying the received frequency provided by the present invention has the following effects:

[0028] 1. The frequency detection module automatically identifies the frequency of the received radio frequency signal; the main control module sends instructions to the filtering component according to the frequency magnitude to select and pass a specific signal frequency band, and calculates the local oscillator frequency according to the frequency magnitude; then the local oscillator frequency and the processed radio frequency signal are mixed by the frequency conversion module to keep the amplitude of the output intermediate-frequency signal constant, thereby simplifying the subsequent circuit structure and optimizing the dynamic range.

[0029] 2. The receiver provided by the present invention has an ultra-wide receiving frequency range, high sensitivity, and a high receiving dynamic range. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0031] Figure 1 It is the first structural schematic diagram of an ultra-wideband receiver for automatically identifying the receiving frequency in an embodiment of the present utility model;

[0032] Figure 2 It is the second structural schematic diagram of an ultra-wideband receiver for automatically identifying the receiving frequency in an embodiment of the present utility model.

[0033] Explanation of the reference numerals:

[0034] Antenna 10, low-noise amplifier 11, frequency detection module 12, filtering component 13, main control module 14, frequency conversion module 15, frequency synthesizer 16, intermediate-frequency filter 17, intermediate-frequency amplifier 18, first variable gain amplifier module 19, second variable gain amplifier module 20, power detection module 21.

[0035] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0036] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0037] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] Referring to Figure 1 , Figure 1 FIG. shows a schematic diagram of the first structure of an ultra-wideband receiver for automatically identifying the received frequency in an embodiment of the present utility model, including: a frequency detection module 12, a filtering component 13, a main control module 14, and a frequency conversion module 15. The input end of the frequency detection module 12 receives a radio frequency signal, and the output end of the frequency detection module 12 is connected to the input end of the main control module 14; the output end of the main control module 14 is respectively connected to the input end of the filtering component 13 and the input end of the frequency conversion module 15; the input end of the filtering component 13 is also used to receive a radio frequency signal, and the output end of the filtering component 13 is connected to the input end of the frequency conversion module 15; the output end of the frequency conversion module 15 is connected to the input end of the main control module 14;

[0040] The frequency detection module 12 is used to detect the frequency of the radio frequency signal and send the detection result to the main control module 14; the main control module 14 determines the required frequency according to the detection result, then controls the filtering component 13 to select the corresponding signal frequency band, calculates the local oscillator frequency according to the required frequency, and sends the local oscillator frequency to the frequency conversion module 15; the filtering component 13 processes the radio frequency signal and sends it to the frequency conversion module 15; the frequency conversion module 15 processes the received local oscillator frequency and the processed radio frequency signal, and outputs an intermediate frequency signal to the main control module 14 for demodulation processing.

[0041] In the figure, RF represents the radio frequency signal, LO represents the local oscillator signal, and IF represents the intermediate frequency signal.

[0042] It can be understood that the function of the frequency detection module 12 is to detect the frequency of the radio frequency signal received by the antenna 10, and it can use methods such as zero-crossing detection, frequency counter, Fourier transform, etc. to detect the frequency, and is specifically set in the frequency detection module 12 according to the situation.

[0043] The filtering component 13 is configured to select and pass a specific signal frequency band according to the instruction sent by the main control module 14. The frequency band width it allows to pass is relatively large, enabling the system to process wide-band signals. The filtering component 13 can adopt structures such as LC filters, microstrip line filters, dielectric filters, surface acoustic wave (SAW) filters, bulk acoustic wave (BAW) filters, integrated circuit (IC) filters, switched capacitor filters, cavity filters, etc. In this embodiment, a cavity filter is preferably adopted, which includes several filters with a high rectangularity coefficient and is cascaded through a switched filter bank.

[0044] The main control module 14 is mainly a control processor, which is used to coordinate and manage the operation of each module in the receiver. For example, it calculates the local oscillator frequency by taking the difference between the required frequency and the preset intermediate frequency; controls the frequency synthesizer 16 (such as a phase-locked loop PLL) to generate the required local oscillator signal for signal mixing; demodulates and decodes the intermediate frequency signal; and for another example, it can also interact with the user interface to display the status, frequency information, signal strength, etc. of the receiver and receive control commands input by the user.

[0045] The frequency conversion module 15 is used to take the difference between the processed radio frequency signal and the local oscillator signal output by the frequency synthesizer 16 and output an intermediate frequency signal, that is, the intermediate frequency signal frequency is equal to the radio frequency signal frequency minus the local oscillator signal frequency. The frequency conversion module 15 can adopt structures such as single-ended mixers, double-balanced mixers, active mixers, passive mixers, phase-locked loop (PLL) mixers, etc., which are selected according to different application scenarios.

[0046] The above-mentioned ultra-wideband receiver for automatically identifying the received frequency automatically identifies the frequency of the received radio frequency signal through the frequency detection module; the main control module sends instructions to the filtering component according to the frequency magnitude to select and pass a specific signal frequency band, and calculates the local oscillator frequency according to the frequency magnitude; then the frequency conversion module mixes the local oscillator frequency and the processed radio frequency signal to keep the amplitude of the output intermediate frequency signal constant, thereby simplifying the subsequent circuit structure and optimizing the dynamic range. The receiver provided by the present utility model has an ultra-wide receiving frequency range, high sensitivity, and a high receiving dynamic range.

[0047] Combined with Figure 2 shown in Figure 2 FIG. shows a second structural schematic diagram of the ultra-wideband receiver for automatically identifying the received frequency in an embodiment of the present utility model. On the basis of Figure 1 it further includes a low-noise amplifier 11, a frequency synthesizer 16, an intermediate frequency filter 17, an intermediate frequency amplifier 18, a first variable gain amplification module 19, a second variable gain amplification module 20, and a power detection module 21.

[0048] Specifically, in one embodiment, a low-noise amplifier 11 is provided at the input end of the frequency detection module 12 and the input end of the filtering component 13; after processing the received radio frequency signal through the low-noise amplifier 11, it is respectively sent to the frequency detection module 12 and the filtering component 13.

[0049] It can be understood that the low-noise amplifier 11 mainly amplifies and reduces the noise of the received radio frequency signal. The low-noise amplifier 11 has characteristics such as ultra-wideband, low noise coefficient, and high gain. By placing the low-noise amplifier at the forefront of the link, the system can maintain a low noise coefficient, thereby improving the receiving sensitivity. When setting, a low-noise amplifier 11 can be jointly set in front of the input end of the frequency detection module 12 and the input end of the filtering component 13, or low-noise amplifiers 11 can be respectively set at the input end of the frequency detection module 12 and the input end of the filtering component 13 to meet the requirements in different scenarios.

[0050] In one embodiment, a frequency synthesizer 16 is provided between the output end of the main control module 14 and the input end of the frequency conversion module 15; the main control module 14 configures the frequency synthesizer 16 according to the local oscillator frequency, and the configured frequency synthesizer 16 processes the input local oscillator frequency and outputs a local oscillator signal; the frequency conversion module 15 processes the received local oscillator signal and the processed radio frequency signal and outputs an intermediate frequency signal.

[0051] It can be understood that the frequency synthesizer 16 is mainly for maintaining the stability and locking of the frequency. Through feedback control, it can stabilize the output frequency at an accurate value even if the input signal has noise or other disturbances; and it can keep the phase of the output signal synchronized with the phase of the reference signal to ensure the consistency of phase and frequency. The frequency synthesizer 16 can adopt a phase-locked loop.

[0052] In one embodiment, a first variable gain amplification module 19 is provided between the output end of the filtering component 13 and the input end of the frequency conversion module 15; after the filtering component 13 processes the radio frequency signal and sends it to the first variable gain amplification module 19 for gain adjustment, it is then sent to the frequency conversion module 15.

[0053] It can be understood that the first variable gain amplification module 19 is an amplifier with adjustable gain, which is used to adjust the gain of the radio frequency signal to maintain a constant output signal strength; and it can detect the strength of the input signal and can also adjust the gain of the amplifier according to needs to ensure the stability of the amplitude of the output signal.

[0054] In one embodiment, an intermediate frequency filtering and amplification module is provided between the output end of the frequency conversion module 15 and the input end of the main control module 14; the frequency conversion module 15 sends the intermediate frequency signal to the intermediate frequency filtering and amplification module, and after the intermediate frequency filtering and amplification module filters and amplifies the intermediate frequency signal, it is then sent to the main control module 14.

[0055] Specifically, the intermediate frequency filtering and amplifying module includes an intermediate frequency filter 17 and an intermediate frequency amplifier 18; the input end of the intermediate frequency filter 17 is connected to the output end of the frequency conversion module 15, the output end of the intermediate frequency filter 17 is connected to the input end of the intermediate frequency amplifier 18, and the output end of the intermediate frequency amplifier 18 is connected to the input end of the main control module 14; the intermediate frequency filter 17 filters the received intermediate frequency signal and then sends it to the intermediate frequency amplifier 18, and the intermediate frequency amplifier 18 amplifies the filtered intermediate frequency signal and then sends it to the main control module 14.

[0056] It can be understood that the intermediate frequency filtering and amplifying module is mainly used to filter and amplify the intermediate frequency signal after frequency conversion, suppress the stray signals or interference signals near the intermediate frequency signal, and improve the signal quality. Specifically, the intermediate frequency filter 17 allows signals in a specific frequency band to pass through through filtering, and at the same time suppresses the interference signals and noise in other frequency bands; the intermediate frequency amplifier 18 amplifies the signal passing through the intermediate frequency filter 17 to a sufficient level, improves the signal-to-noise ratio of the signal, and improves the receiving performance for subsequent processing and demodulation.

[0057] In one embodiment, a second variable gain amplifying module 20 is provided between the output end of the intermediate frequency filter 17 and the input end of the intermediate frequency amplifier 18; the intermediate frequency filter 17 filters the received intermediate frequency signal and then sends it to the second variable gain amplifying module 20 for gain adjustment, and the second variable gain amplifying module 20 adjusts the gain of the filtered intermediate frequency signal and then sends it to the intermediate frequency amplifier 18.

[0058] It can be understood that the function of the second variable gain amplifying module 20 is the same as that of the first variable gain amplifying module 19, except that the second variable gain amplifying module 20 is used to adjust the gain of the intermediate frequency signal.

[0059] In one embodiment, a power detection module 21 is further provided; the input end of the power detection module 21 is connected to the output end of the intermediate frequency amplifier 18, and the output end of the power detection module 21 is respectively connected to the input ends of the first variable gain amplifying module 19 and the second variable gain amplifying module 20; the power detection module 21 detects the power of the intermediate frequency signal processed by the intermediate frequency filtering and amplifying module, and outputs a corresponding control voltage according to the detection result to adjust the gains of the first variable gain amplifying module 19 and the second variable gain amplifying module 20.

[0060] It can be understood that the power detection module 21 adjusts the gains of the first variable gain amplifying module and the second variable gain amplifying module through the output control voltage VC, which can expand the dynamic range of the system, ensure that the signal can be effectively processed throughout the range, and thus enable the system to have a wide receiving dynamic range.

[0061] In one embodiment, the power detection module 21 employs a large dynamic range detector.

[0062] During operation, after the antenna 10 receives a radio frequency signal from space, it sends the signal to the low-noise amplifier 11. The main function of the low-noise amplifier 11 is to amplify the weak signal received by the antenna 10 and improve the signal-to-noise ratio of the receiving system while minimizing noise as much as possible.

[0063] The signal amplified by the low-noise amplifier 11 is sent to the frequency detection module 12 for detection. The frequency detection module 12 sends the detected frequency information to the main control module 14. The main control module 14 extracts the required frequency value according to the received frequency information. Then, according to the frequency value, on the one hand, the main control module 14 controls the switch of the filtering component 13 to select the filter serial number corresponding to the frequency. On the other hand, the main control module 14 subtracts the received frequency from the preset intermediate frequency to calculate the local oscillator frequency, and then configures the frequency synthesizer 16 according to the local oscillator frequency, so that the frequency synthesizer 16 outputs the corresponding local oscillator signal.

[0064] After passing through the filtering component 13, the radio frequency signal passes through the first variable gain amplification module 19 and is mixed with the local oscillator signal output by the frequency synthesizer 16 in the frequency conversion module 15 to obtain a preset intermediate frequency signal. Then, after passing through the intermediate frequency filter 17, the second variable gain amplification module 20, and the intermediate frequency amplifier 18, the signal enters the main control module 14 for demodulation processing, and finally the useful information in the signal received by the antenna 10 is demodulated.

[0065] At the same time, the power detection module 21 detects the magnitude of the intermediate frequency signal input to the main control module 14 and outputs the corresponding voltage value to control the first variable gain amplification module 19 and the second variable gain amplification module 20 in the link to ensure that the amplitude of the intermediate frequency signal output to the main control module 14 remains constant.

[0066] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0067] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the appended claims.

Claims

1. An ultra-wideband receiver capable of automatically identifying a receiving frequency, characterized in that: include: Frequency detection module, filter component, main control module and frequency conversion module; The input end of the frequency detection module receives the radio frequency signal, and the output end of the frequency detection module is connected to the input end of the main control module; the output end of the main control module is respectively connected to the input end of the filter component and the input end of the frequency conversion module; the input end of the filter component is also used to receive the radio frequency signal, and the output end of the filter component is connected to the input end of the frequency conversion module; the output end of the frequency conversion module is connected to the input end of the main control module; The frequency detection module is used to detect the frequency of the radio frequency signal and send the detection result to the main control module; The main control module determines the required frequency according to the detection result, controls the filter component to select the corresponding signal frequency band, calculates the local oscillator frequency according to the required frequency, and sends the local oscillator frequency to the frequency conversion module; the filter component processes the radio frequency signal and sends it to the frequency conversion module; the frequency conversion module processes the received local oscillator frequency and the processed radio frequency signal, and outputs the intermediate frequency signal to the main control module for demodulation processing.

2. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 1, characterized in that: A low noise amplifier is also provided at the input end of the frequency detection module and the input end of the filter component; After the received radio frequency signal is processed by the low noise amplifier, it is sent to the frequency detection module and the filter component respectively.

3. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 1, characterized in that: A frequency synthesizer is provided between the output end of the main control module and the input end of the frequency conversion module; The main control module configures the frequency synthesizer according to the local oscillator frequency, and the configured frequency synthesizer processes the input local oscillator frequency and outputs a local oscillator signal; the frequency conversion module processes the received local oscillator signal and the processed radio frequency signal and outputs an intermediate frequency signal.

4. The ultra-wideband receiver for automatically identifying receiving frequency according to any one of claims 1 to 3, characterized in that: A first variable gain amplification module is provided between the output end of the filter component and the input end of the frequency conversion module; The filter component processes the radio frequency signal and sends it to the first variable gain amplifier module for gain adjustment, and then sends it to the frequency conversion module.

5. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 4, characterized in that: An intermediate frequency filtering and amplifying module is provided between the output end of the frequency conversion module and the input end of the main control module; The frequency conversion module sends the intermediate frequency signal to the intermediate frequency filtering and amplifying module, and the intermediate frequency filtering and amplifying module performs filtering and amplifying processing on the intermediate frequency signal and then sends it to the main control module.

6. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 5, characterized in that: The intermediate frequency filtering and amplifying module comprises an intermediate frequency filter and an intermediate frequency amplifier; The input end of the intermediate frequency filter is connected to the output end of the frequency conversion module, the output end of the intermediate frequency filter is connected to the input end of the intermediate frequency amplifier, and the output end of the intermediate frequency amplifier is connected to the input end of the main control module; The intermediate frequency filter filters the received intermediate frequency signal and sends it to the intermediate frequency amplifier. The intermediate frequency amplifier amplifies the filtered intermediate frequency signal and sends it to the main control module.

7. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 6, characterized in that: A second variable gain amplification module is provided between the output end of the intermediate frequency filter and the input end of the intermediate frequency amplifier; The intermediate frequency filter filters the received intermediate frequency signal and sends it to the second variable gain amplifier module for gain adjustment. The second variable gain amplifier module adjusts the gain of the filtered intermediate frequency signal and sends it to the intermediate frequency amplifier.

8. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 7, characterized in that: A power detection module is also provided; The input end of the power detection module is connected to the output end of the intermediate frequency amplifier, and the output end of the power detection module is respectively connected to the input end of the first variable gain amplification module and the input end of the second variable gain amplification module; The power detection module detects the power of the intermediate frequency signal processed by the intermediate frequency filtering and amplifying module, and outputs a corresponding control voltage according to the detection result to adjust the gain of the first variable gain amplifying module and the second variable gain amplifying module.

9. The ultra-wideband receiver for automatically identifying receiving frequency according to claim 8, characterized in that: The power detection module adopts a large dynamic range detector.

10. The ultra-wideband receiver for automatically identifying receiving frequency according to any one of claims 1 to 3, characterized in that: The filter assembly includes a plurality of filters with high rectangular coefficients, which are cascaded through a switch filter group.

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