Radio frequency detection dynamic range expansion method, system and receiver

Abstract

The invention provides a radio frequency detection dynamic range expansion method, a radio frequency detection dynamic range expansion system and a receiver. The radio frequency detection dynamic range expansion method comprises the following steps: dividing a radio frequency signal into a first path signal and a second path signal with equal power; performing attenuation processing on the first path signal to obtain a first processing signal; performing amplification processing on the second path signal to obtain a second processing signal; analog addition is carried out on the detection voltage of the first processing signal and the detection voltage of the second processing signal to synthesize output voltage, and the output characteristic of the output voltage is jointly determined by attenuation corresponding to attenuation processing and gain corresponding to amplification processing. Through precise design of gains, attenuation and detector working points of the two paths, cross-region continuous and monotonous output is realized, no dead zone or jump exists, and the linearity of the system is ensured.

Description

Technical Field

[0001] This invention relates to the field of radio frequency detection, and more particularly to a method, system, and receiver for extending the dynamic range of radio frequency detection. Background Technology

[0002] Radio frequency (RF) power detection is a key technology in modern communication systems, radar systems, and various RF applications, and its dynamic range directly affects the system's performance. With the rapid development of wireless communication technology, the requirements for the dynamic range of RF detection are becoming increasingly stringent. Traditional RF power detection schemes typically employ a single detector structure, but this structure has significant limitations in terms of dynamic range.

[0003] In existing technologies, radio frequency (RF) power detection typically uses a detector to convert the RF signal into a DC voltage, and then determines the power of the RF signal by measuring this voltage. However, the dynamic range of a single detector is usually limited by the characteristics of the detector itself, making it difficult to simultaneously meet the requirements of high sensitivity and high power detection. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention proposes a method, system and receiver for extending the dynamic range of radio frequency detection, which mainly solves the problem that the dynamic range of a single detector scheme is limited by the linear range of the device itself and cannot meet the requirements of high dynamic range scenarios.

[0005] To achieve the above and other objectives, the technical solution adopted by the present invention is as follows.

[0006] This invention provides a method for extending the dynamic range of radio frequency detection, comprising: The radio frequency signal is divided into a first path signal and a second path signal with equal power. The first path signal is attenuated to obtain the first processed signal; The second path signal is amplified to obtain the second processed signal; The detection voltage of the first processed signal and the detection voltage of the second processed signal are added together in a simulated manner to synthesize an output voltage, wherein the output characteristics of the output voltage are jointly determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing.

[0007] In one embodiment of the present invention, when the power of the radio frequency signal is lower than a first preset power threshold, the second path transmitting the second path signal operates to amplify the second path signal and increase the detection sensitivity of the radio frequency signal to above the target detection sensitivity; when the power of the radio frequency signal is higher than a second preset power threshold, the second path saturates, and the first path transmitting the first path signal continues to operate to attenuate the first path signal.

[0008] In one embodiment, the output characteristics of the output voltage are determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing, including: calculating the sum of the attenuation amount and the gain to obtain a comparison quantity; comparing the comparison quantity with a preset dynamic range of a single detector to obtain a comparison result; and determining the slope of the curve corresponding to the output characteristics based on the comparison result.

[0009] In one embodiment of the present invention, determining the curve slope corresponding to the output characteristic based on the comparison result includes the following steps: when the comparison value is equal to the dynamic range, the curve slope is approximately equal to the slope of the single detector, so that the output characteristic exhibits a continuous linear characteristic; when the comparison value is less than the dynamic range, the curve slope changes from the slope of the single detector to twice the slope of the single detector, and then back to the slope of the single detector, so that the output characteristic exhibits a three-segment broken line characteristic; when the comparison value is greater than the dynamic range, the curve slope changes from the slope of the single detector to zero, and then back to the slope of the single detector, so that the output characteristic exhibits a three-segment broken line characteristic.

[0010] In one embodiment of the present invention, the attenuation amount is a fixed value or is controlled by a programmable attenuator.

[0011] In one embodiment of the present invention, the gain is controlled by a digitally programmable amplifier.

[0012] The present invention also provides a radio frequency detection dynamic range extension system, comprising: a power divider module for dividing a radio frequency signal into a first path signal and a second path signal with equal power; an attenuation module for attenuating the first path signal to obtain a first processed signal; an amplification module for amplifying the second path signal to obtain a second processed signal; a first detection module for detecting the detection voltage of the first processed signal; a second detection module for detecting the detection voltage of the second processed signal; and a signal synthesis module for analog addition of the detection voltage of the first processed signal and the detection voltage of the second processed signal to synthesize an output voltage, wherein the output characteristics of the output voltage are jointly determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing.

[0013] In one embodiment of the present invention, the attenuation module includes a fixed attenuator and / or a digitally programmable attenuator.

[0014] In one embodiment of the present invention, a filter is further connected between the amplification module and the second detection module.

[0015] The present invention also provides a receiver comprising the aforementioned radio frequency detection dynamic extension system.

[0016] As described above, the radio frequency detection dynamic range extension method, system, and receiver of the present invention have the following beneficial effects.

[0017] This invention employs a dual-path parallel processing architecture, dividing the RF signal into two paths for attenuation and amplification respectively. The signals are then synthesized using analog summation, theoretically expanding the dynamic range to twice that of a single detector under narrowband conditions. This significantly overcomes the limitation of traditional single-detector solutions, which struggle to exceed a 70dB dynamic range. Utilizing a fully analog signal processing link with no digital processing delay, the measured transient response time reaches the 50ns level, far exceeding any digital splicing scheme, thus meeting the stringent requirements of applications demanding rapid response. Furthermore, it eliminates the need for high-speed ADCs and complex DSPs, relying solely on analog circuitry. The combination of paths can achieve a leap in performance, with hardware costs significantly lower than digital solutions, while avoiding the increased manufacturing costs and design complexity caused by relying on process upgrades. By precisely designing the gain, attenuation, and detector operating point of the two paths, this invention achieves continuous, monotonic output across regions without "dead zones" or "jumps," ensuring the linearity of the system and allowing the output characteristics to exhibit different curve characteristics depending on the attenuation and gain settings. Since this system is entirely an analog solution, it has inherent radiation resistance characteristics in the aerospace field, eliminating the need for radiation hardening design, and its cost is only 10% of that of digital solutions. Attached Figure Description

[0018] Figure 1 This is a flowchart illustrating a method for extending the dynamic range of radio frequency detection in one embodiment of the present invention. Figure 2 A schematic diagram of the response characteristics of a single detector; Figure 3 This is a schematic diagram showing the comparison between the measured output voltage and input power characteristics and the theoretical curves in one embodiment of the present invention; Figure 4 This is a schematic diagram of the circuit architecture of a radio frequency detection dynamic range extension system in one embodiment of the present invention. Detailed Implementation

[0019] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] Terminology Explanation: Dynamic range refers to the power ratio of the maximum signal to the minimum signal that a radio frequency system or device can handle, measured in decibels (dB).

[0022] Radio frequency power detection is a critical functional module in wireless communication systems, and its dynamic range performance directly determines the receiver's ability to process weak and strong signals. Traditional solutions based on a single detector are limited by the linear range of the device itself, and their dynamic range is usually difficult to exceed 70dB, which cannot meet the requirements of modern systems for extremely high dynamic range.

[0023] Existing techniques for extending dynamic range have the following drawbacks: Digital splicing solution: Employs multi-channel ADC sampling and digital signal processing. This solution inherently suffers from processing latency, slow response speed, high system complexity and power consumption, making it unsuitable for scenarios with stringent requirements for instantaneous response. Process upgrade solution: Relying on more advanced semiconductor processes to improve single-tube performance, but this will significantly increase manufacturing costs and design complexity.

[0024] In view of the problems existing in the prior art, the present invention provides a method, system and receiver for extending the dynamic range of radio frequency detection. The technical solution of the present invention will be described in detail below with reference to specific embodiments.

[0025] Please see Figure 1 This invention provides a method for extending the dynamic range of radio frequency (RF) detection. By performing path segmentation, differential processing, and signal synthesis on the RF signal, the detection dynamic range is effectively extended. The specific implementation steps are as follows: Step S100: The input radio frequency signal is divided into a first path signal and a second path signal with equal power.

[0026] In one embodiment, the input radio frequency signal can be divided into a first path signal and a second path signal by a power divider to ensure that the two path signals have the same power level, laying the foundation for subsequent differentiated processing.

[0027] Step S110: Attenuate the first path signal to obtain the first processed signal.

[0028] In one embodiment, the attenuation process can employ a fixed attenuation amount. In another embodiment, the attenuation process can also be controlled by a programmable attenuator, allowing the attenuation amount to be dynamically adjusted according to actual application requirements, providing more flexible signal processing capabilities. The specific attenuation amount can be set according to the actual application scenario requirements, and is not limited here.

[0029] Step S120: Amplify the second path signal to obtain the second processed signal.

[0030] In one embodiment, the amplification process is controlled by a digitally programmable amplifier. The digitally programmable amplifier allows for precise control of the gain value via a digital interface, ensuring the accuracy and controllability of the amplification process. The specific gain can be set according to the requirements of the actual application scenario, and is not limited here. Step S130 involves analog addition of the detected voltages of the first processed signal and the second processed signal to synthesize the output voltage. This step is implemented using an analog adder, which directly adds the voltage values ​​of the two processed signals to form the final output voltage. The output characteristics of the output voltage are determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing.

[0031] In one embodiment, the detection voltage of the first processed signal and the detection voltage of the second processed signal can be obtained separately using a detector. See also... Figure 2 The response characteristics of a single detector can be divided into three operating regions: the subsensitivity region, the linear region, and the saturation region.

[0032] Sub-sensitivity region: when the input power P RF The sensitivity power P of a single detector sen At that time, the output voltage V off The voltage remains constant. At this time, the output voltage V... out It can be represented as: (1) Linear-in-dB region: If the input power is within the sensitivity power P sen and saturation power P sat Between, the output voltage V out It exhibits a linear response within the dB range. At this time, the output voltage V... out It can be represented as: (2) Where a is the logarithmic slope.

[0033] Saturation region: when P RF More than P satAt this point, the output voltage no longer increases and stabilizes at its maximum value V. sat It may even decrease. At this time, the output voltage V out It can be represented as: (3) Therefore, the dynamic range of a single detector can be expressed as: (4) Based on the characteristics of a single detector, embodiments of the present invention extend the dynamic range by operating two detectors. This system operation is divided into four distinct regions, where P... sys、sen and P sys、 sat These represent the system's sensitivity power and saturation power, respectively. When determining the theoretical value of the system's sensitivity, the most important factor is to first consider the noise power (P) present at the detector input in the amplification path under static conditions, expressed by formula (5). noise ).

[0034] (5) Where NF is the cumulative noise figure (in dB) of the entire RF chain from the system input to the detector amplification path, B is the effective noise bandwidth (in Hz), and G is the total gain (in decibels). -174 dBm / Hz represents the theoretical thermal noise power spectral density at room temperature.

[0035] The system begins to respond when the input power is increased sufficiently from the statically driven amplification path. System sensitivity power P sys，sen By P noise Does it exceed the detector's inherent sensitivity power P? sen Decision. Therefore, the system sensitivity power P sys，sen It can be represented as: (6) V in the magnification path noise The static output voltage is defined as the amplification path. Embodiments of the present invention can be characterized by four regions. Region I refers to a region where both paths (the amplification path and the attenuation path) are static. In this case, V... out Vout is a constant and can be calculated using (7), satisfying the constraints expressed in (8). Region II represents the case where the amplification path is active. Vout is expressed in (9) and satisfies the constraints of (10). Region III represents the case where the attenuation path is active. Vout is expressed by (11) and satisfies the condition of (12), where the amplification path is saturated. Finally, Region IV represents the case where both paths are saturated. Vout is shown in (13) and satisfies the condition of (14).

[0036] (7) (8) (9) (10) (11) (12) (13) (14) The linear response range of this application embodiment is represented by region II and region III, and the dynamic range can be calculated by formula (15).

[0037] (15) Among them, P sys.sat The system saturation point can be represented as follows: (16) Based on the above analysis, when the power of the radio frequency signal is lower than the first preset power threshold, the second path (i.e., the amplification path) operates to amplify the second path signal, thereby increasing the detection sensitivity of the radio frequency signal above the target detection sensitivity. The first preset power threshold can be set to -80dBm. When the radio frequency signal power is lower than this threshold, the amplification effect of the second path significantly improves the system's ability to detect weak signals. The target detection sensitivity can also be configured according to the specific application scenario, and is not limited here.

[0038] In one embodiment, when the power of the radio frequency signal exceeds a second preset power threshold, the second path saturates, and the first path (i.e., the attenuation path) transmitting the first path signal continues to operate to attenuate the first path signal. The second preset power threshold can be set to -10dBm. When the radio frequency signal power exceeds this threshold, the attenuation effect of the first path effectively prevents detector saturation, ensuring that the system can still operate normally under high-power signals. The first and second preset power thresholds here are only examples, and their specific values ​​can be set and adjusted according to actual application requirements.

[0039] In one embodiment, the specific implementation method in which the output characteristics of the output voltage are determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing includes the following steps: First, the sum of the attenuation and gain is calculated to obtain the comparison value. For example, when the attenuation is 15dB and the gain is 10dB, the comparison value is 25dB.

[0040] Next, the comparison value is compared with the preset dynamic range of a single detector to obtain the comparison result. The dynamic range of a single detector can be expressed as DR.single .

[0041] Finally, the slope of the curve corresponding to the output characteristic is determined based on the comparison results.

[0042] Specifically, when the comparison quantity equals the dynamic range DR single When the slope of the curve approximates the slope of a single detector, the output characteristics exhibit continuous linearity. For example, if the slope of a single detector is denoted by 'a', then the output voltage approximates a continuous characteristic with the slope 'a' of a single detector throughout the entire extended dynamic range.

[0043] When the comparison value is less than the dynamic range DR single As the slope of the curve changes from the slope of a single detector to twice the slope of a single detector, and then back to the slope of a single detector, the output characteristic exhibits a three-segment piecewise linear characteristic. For example, the slope of the output characteristic is 'a' in the low-power region, the slope increases to 2a in the middle-power region, and the slope returns to 'a' in the high-power region, forming a three-segment piecewise linear characteristic.

[0044] When the comparison value is greater than the dynamic range DR single As the slope of the curve changes from the slope of a single detector to zero and then back to the slope of a single detector, the output characteristic exhibits a three-segment piecewise linear characteristic. For example, the output characteristic has a slope of 'a' in the low-power region, decreases to 0 in the intermediate-power region to form a plateau region, and recovers to 'a' in the high-power region, thus forming a three-segment piecewise linear characteristic.

[0045] Through the above steps, this method effectively expands the dynamic range of radio frequency detection, enabling the system to simultaneously detect weak and strong radio frequency signals, thereby improving the applicability and reliability of the detection system.

[0046] Please see Figure 3 , Figure 3 This is a schematic diagram comparing the measured output voltage and input power characteristics with theoretical curves in one embodiment of the present invention. The input power range is covered from -78 dBm to +20 dBm. This 98 dB dynamic range verifies the dynamic range extension method of this embodiment and confirms the successful extension of the dynamic range. The measured system sensitivity (Psys, sen) is approximately -78 dBm, which is in high agreement with the theoretical prediction.

[0047] Please see Figure 4 , Figure 4 This is a schematic diagram of the circuit architecture of a radio frequency detection dynamic range extension system according to an embodiment of the present invention. This application also provides a radio frequency detection dynamic range extension system including a power divider module 01, an attenuation module, an amplification module 05, a first detection module 04, a second detection module 07, and a signal synthesis module 08.

[0048] The power divider module 01 is used to divide the received radio frequency signal into a first path signal and a second path signal with equal power. The power divider module 01 uses a power distribution device to achieve equal distribution of the signal, ensuring that the two path signals have the same power level, providing a basis for subsequent differentiated processing.

[0049] The attenuation module is located on the first path from the power divider module 01 and is used to attenuate the first path signal output by the power divider module 01 to obtain the first processed signal. The attenuation module includes a fixed attenuator 02 and a digitally programmable attenuator 03. The fixed attenuator 02 provides a fixed attenuation amount; the digitally programmable attenuator 03 provides adjustable attenuation capability, which can be precisely adjusted according to actual needs. By using the fixed attenuator 02 and the digitally programmable attenuator 03 in combination, the attenuation module can effectively process high-power signals, avoid saturation of subsequent detection circuits, and thus expand the system's detection capability under high-power signals. The fixed attenuator 02 or the digitally programmable attenuator 03 can be selectively enabled, that is, only one of them can be selected to be connected to the first path. The specific attenuator used can be configured and adjusted according to actual application requirements, and there are no restrictions here.

[0050] Amplification module 05 is located on the second path output from power divider module 01. It amplifies the signal from the second path output by power divider module 01 to obtain a second processed signal. Amplification module 05 can employ a low-noise amplifier, effectively enhancing the strength of weak signals while maintaining a good signal-to-noise ratio. The gain of amplification module 05 can be designed and adjusted according to system requirements to ensure that weak signals are effectively amplified within the sensitivity range of the detection module.

[0051] A filter 06 is connected between the amplification module 05 and the second detection module 07. This filter 06 is used to filter out noise and interference signals that may be introduced during the amplification process, ensuring the purity of the second processed signal. The filter 06 can be selected as a bandpass filter or a low-pass filter according to the actual application scenario, and its cutoff frequency and passband characteristics need to match the system's operating frequency. The introduction of filter 06 further improves the system's detection accuracy for weak signals and reduces distortion that may be introduced during the amplification process.

[0052] The first detection module 04 is connected to the output of the attenuation module and is used to detect the detection voltage V_det1 of the first processed signal. The first detection module 04 can employ an RF detection circuit, which can convert the attenuated RF signal into a corresponding DC voltage value. The first detection module 04 is mainly responsible for detecting high-power signals. Through pre-stage attenuation processing, the high-power signal is reduced to within the linear operating range of the detector, avoiding detection saturation.

[0053] The second detection module 07 is connected to the output of the filter 06 and is used to detect the detection voltage V_det2 of the second processed signal. The second detection module 07 can also employ an RF detection circuit. Through pre-amplification and filtering, weak signals are amplified to within the sensitivity range of the detection module, ensuring that low-power signals can be accurately detected.

[0054] The signal synthesis module 08 is connected to the output terminals of the first detection module 04 and the second detection module 07. It is used to perform an analog addition of the detection voltage V_det1 of the first processed signal and the detection voltage V_det2 of the second processed signal to synthesize the output voltage V_out. The signal synthesis module 08 is implemented using an analog adder circuit, where the output voltage characteristics are determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing. By carefully designing the attenuation and gain values, the two detection voltages function differently within different input power ranges: when the input signal power is low, the amplified second path detection voltage dominates; when the input signal power is high, the attenuated first path detection voltage dominates.

[0055] This dual-path processing and signal synthesis design enables the system to detect both high-power and low-power signals simultaneously, effectively expanding the dynamic range of radio frequency detection.

[0056] In one embodiment, the attenuation module may consist of only a fixed attenuator, which is suitable for application scenarios where the dynamic range requirement is not high but the structure needs to be simple.

[0057] In another embodiment, the attenuation module includes only a digitally programmable attenuator, which is suitable for application scenarios that require flexible adjustment of the dynamic range.

[0058] This application also provides a receiver that includes the aforementioned radio frequency detection dynamic extension system. The basic structure and working principle of this system have been described in detail in the foregoing embodiments and will not be repeated here.

[0059] The receiver integrates this RF detection dynamic range extension system, enabling it to simultaneously detect both high-power and low-power signals, effectively expanding the dynamic range of RF signal detection. The received RF signal is split into two equal-power signals by a power divider module, which then undergoes attenuation and amplification processing before detection. Finally, a signal synthesis module simulates the addition of the two detected voltages to obtain the final output voltage.

[0060] The attenuation module in this receiver can include a fixed attenuator and a digitally programmable attenuator, providing fixed attenuation and adjustable attenuation capabilities. A filter is connected between the amplification module and the second detection module to filter out noise and interference signals that may be introduced during the amplification process.

[0061] By integrating this RF detection dynamic range extension system, the receiver's detection port can quickly (within 50ns) indicate the signal strength received by the link, with a dynamic range of up to 100dB, ensuring the real-time and accurate power indication. Simultaneously, the receiver's feedforward automatic gain control (AGC) circuit can rapidly extend the dynamic range (on the 100ns level) to over 100dB, adapting to almost all receiving systems and meeting the wide dynamic range RF detection requirements of modern communication systems. It is particularly suitable for communication scenarios requiring the handling of large variations in signal strength.

[0062] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for extending the dynamic range of radio frequency detection, characterized in that, include: The radio frequency signal is divided into a first path signal and a second path signal with equal power. The first path signal is attenuated to obtain the first processed signal; The second path signal is amplified to obtain the second processed signal; The detection voltage of the first processed signal and the detection voltage of the second processed signal are added together in a simulated manner to synthesize an output voltage, wherein the output characteristics of the output voltage are jointly determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing.

2. The method for extending the dynamic range of radio frequency detection according to claim 1, characterized in that, When the power of the radio frequency signal is lower than a first preset power threshold, the second path transmitting the second path signal operates to amplify the second path signal and increase the detection sensitivity of the radio frequency signal to above the target detection sensitivity; when the power of the radio frequency signal is higher than a second preset power threshold, the second path saturates, and the first path transmitting the first path signal continues to operate to attenuate the first path signal.

3. The method for extending the dynamic range of radio frequency detection according to claim 1, characterized in that, The output characteristics of the output voltage are determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing, including: The sum of the attenuation and the gain is calculated to obtain the comparison value; The comparison value is compared with the preset dynamic range of a single detector to obtain the comparison result; The slope of the curve corresponding to the output characteristic is determined based on the comparison results.

4. The method for extending the dynamic range of radio frequency detection according to claim 3, characterized in that, Determining the slope of the curve corresponding to the output characteristic based on the comparison results includes the following steps: When the comparison value is equal to the dynamic range, the slope of the curve approximates the slope of the single detector, making the output characteristics exhibit continuous linearity. When the comparison value is less than the dynamic range, the slope of the curve changes from the slope of the single detector to twice the slope of the single detector, and then back to the slope of the single detector, so that the output characteristic exhibits a three-segment broken line characteristic. When the comparison value is greater than the dynamic range, the slope of the curve changes from the slope of the single detector to zero, and then back to the slope of the single detector, so that the output characteristic exhibits a three-segment broken line characteristic.

5. The method for extending the dynamic range of radio frequency detection according to claim 1, characterized in that, The attenuation amount is a fixed value, or it can be controlled by a programmable attenuator.

6. The method for extending the dynamic range of radio frequency detection according to claim 1 or 5, characterized in that, The gain is controlled by a digitally programmable amplifier.

7. A radio frequency detection dynamic range extension system, characterized in that, include: A power divider module is used to divide radio frequency signals into first path signals and second path signals with equal power. An attenuation module is used to attenuate the first path signal to obtain a first processed signal; An amplification module is used to amplify the second path signal to obtain a second processed signal; The first detection module is used to detect the detection voltage of the first processed signal; The second detection module is used to detect the detection voltage of the second processed signal; The signal synthesis module is used to simulate the addition of the detection voltage of the first processed signal and the detection voltage of the second processed signal to synthesize an output voltage, wherein the output characteristics of the output voltage are jointly determined by the attenuation amount corresponding to the attenuation processing and the gain corresponding to the amplification processing.

8. The radio frequency detection dynamic range extension system according to claim 7, characterized in that, The attenuation module includes a fixed attenuator and / or a digitally programmable attenuator.

9. The radio frequency detection dynamic range extension system according to claim 7, characterized in that, A filter is also connected between the amplification module and the second detection module.

10. A receiver, characterized in that, The receiver includes the radio frequency detection dynamic extension system as described in any one of claims 7-9.

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