Intermediate frequency audio transceiving analysis module, device and analysis method

Abstract

The invention provides an intermediate frequency audio transceiving analysis module, device and method, and relates to the technical field of signal testing. The module comprises an intermediate frequency signal processing unit and an audio unit. The intermediate frequency signal processing unit is used for receiving an intermediate frequency signal sent by the radio frequency module and performing signal analysis on the intermediate frequency signal to obtain a detection result of the intermediate frequency signal; a first demodulation signal is generated and output based on the detection result; the intermediate-frequency signal processing unit is also used for generating an intermediate-frequency signal for simulating various modulations and outputting the intermediate-frequency signal to the outside; the audio unit is used for carrying out amplitude conditioning operation on an audio signal and then carrying out measurement analysis on the audio signal under the condition that the audio signal is received so as to obtain a measurement result of the external audio signal; and the audio unit is also used for generating a standard audio signal with changeable frequency and level and outputting the standard audio signal to the outside. The module provided by the invention can improve the flexibility of intermediate frequency audio signal processing.

Description

Technical Field

[0001] This application relates to the technical field of signal testing, and particularly to an intermediate frequency audio transceiver analysis module, device, and analysis method. Background Art

[0002] In the current fields of communication and audio processing technologies, intermediate frequency audio transceiver modules play a crucial role. They are not only responsible for receiving and processing intermediate frequency signals from the outside, but also undertake the tasks of generating intermediate frequency signal outputs and standard audio sources, and at the same time conduct detailed analysis of external audio signals. This functional module is widely used in multiple fields such as wireless communication, audio signal processing, broadcasting, and multimedia applications.

[0003] Existing intermediate frequency audio transceiver modules often only support a limited number of modulation methods during design, such as simple digital modulation or analog modulation. With the continuous development of communication technologies, new modulation methods have emerged continuously, and traditional modules often struggle to adapt to these new requirements. This results in limited adaptability of the modules when facing complex and changing communication environments, and they are unable to provide flexible signal processing solutions. Therefore, there is a problem of relatively low flexibility in intermediate frequency audio signal processing in the prior art. Summary of the Invention

[0004] This application provides an intermediate frequency audio transceiver analysis module, device, and analysis method, which can generate an intermediate frequency signal simulating various modulations, improving the flexibility and adaptability of intermediate frequency audio signal processing.

[0005] In a first aspect, an embodiment of this application provides an intermediate frequency audio transceiver analysis module, which may include an intermediate frequency signal processing unit and an audio unit;

[0006] The intermediate frequency signal processing unit is used to receive the intermediate frequency signal sent from the radio frequency module, conduct signal analysis on the intermediate frequency signal to obtain the detection result of the intermediate frequency signal; and generate and output a first demodulation signal based on the detection result;

[0007] The intermediate frequency signal processing unit is further used to generate an intermediate frequency signal simulating multiple modulations and output it externally;

[0008] The audio unit is used to, when receiving an audio signal, conduct amplitude conditioning operation on the audio signal and then conduct measurement and analysis to obtain the measurement result of the external audio signal;

[0009] The audio unit is further used to generate a standard audio signal with variable frequency and level and output it externally.

[0010] In some embodiments, the intermediate frequency signal processing unit is configured to perform signal detection on the first modulation signal during the process of modulating the intermediate frequency signal, obtain a signal detection result of the first modulation signal, and generate the second modulation signal based on the signal detection result.

[0011] In some embodiments, the intermediate frequency modulation signal generated by the intermediate frequency signal processing unit includes any one of a single carrier signal, an amplitude modulation signal, a frequency modulation signal, an upper sideband modulation signal, a lower sideband modulation signal, and a phase modulation signal.

[0012] In some embodiments, the signal detection result of the first modulation signal includes one or more detection results of the modulation depth, signal frequency, distortion degree, and SINAD index of the modulation signal.

[0013] In the above implementation process, the intermediate frequency signal processing unit can obtain information about key parameters such as modulation depth, signal frequency, distortion degree, and SINAD index by performing real-time detection on the first modulation signal, thereby providing a basis for dynamically adjusting the second modulation signal and improving the stability and quality of the output signal. Moreover, the intermediate frequency signal processing unit can provide a variety of modulation methods for selection and can generate an intermediate frequency signal simulating various modulations, enabling the intermediate frequency audio transceiver analysis module to select the most suitable modulation method according to specific application scenarios and requirements, thereby improving the flexibility and adaptability of intermediate frequency audio signal processing.

[0014] In some embodiments, the audio unit includes an audio generation sub-unit, and the audio generation sub-unit is used to generate an audio signal of 10 Hz - 100 kHz, and the frequency and output amplitude of the audio signal are based on soft panel control.

[0015] In some embodiments, the audio unit further includes an audio signal measurement sub-unit, and the audio signal measurement sub-unit is used to receive an external audio signal and perform signal measurement on the external audio signal. The signal measurement includes performing first amplitude conditioning on the external audio signal to obtain a first audio signal and a second audio signal, performing frequency measurement on the first audio signal, performing second amplitude conditioning on the second audio signal to obtain a third audio signal, performing signal sampling on the third audio signal to obtain sampling data, and then analyzing the sampling data.

[0016] In some embodiments, the audio unit further includes a demodulated audio subunit, which is configured to receive a demodulated audio signal, perform conditioning filtering on the demodulated audio signal to obtain a first demodulated audio signal, a second demodulated audio signal, and a third demodulated audio signal. The first demodulated audio signal is for external output, the second demodulated audio signal is for adjusting the volume and then output through a speaker, and the third demodulated audio signal is for output to a headphone jack.

[0017] In the above embodiments, the audio unit can perform amplitude conditioning on the received audio signal, which can improve the stability and accuracy of the audio signal. By performing the first amplitude conditioning on the audio signal, the flexibility of signal processing is increased, enabling the module to process a wider range of signal frequencies. The basic frequency characteristics of the audio signal can be obtained through frequency measurement, and the amplitude of the audio signal can be compared and judged through level comparison, which can improve the processing efficiency of the audio signal and the accuracy of signal processing.

[0018] In some embodiments, the audio unit further includes a power supply, which is composed of 5 DC-DC converters and 5 low-dropout linear regulators.

[0019] In a second aspect, an embodiment of the present application provides an intermediate frequency audio transceiver analysis device, which includes the intermediate frequency audio transceiver analysis module described in the above description.

[0020] In a third aspect, an embodiment of the present application provides an intermediate frequency audio transceiver analysis method, which can be applied to an intermediate frequency audio transceiver analysis module. The intermediate frequency audio transceiver analysis module includes an intermediate frequency signal processing unit and an audio unit;

[0021] The method includes:

[0022] Receiving an intermediate frequency signal sent from a radio frequency module, performing signal analysis on the intermediate frequency signal to obtain a detection result of the intermediate frequency signal; and generating and outputting a first demodulated signal based on the detection result;

[0023] When an audio signal is received, performing amplitude conditioning operation on the audio signal and then performing measurement and analysis to obtain a measurement result of the external audio signal;

[0024] Generating an intermediate frequency signal simulating multiple modulations and outputting it externally, and generating a standard audio signal with variable frequency and level and outputting it externally.

[0025] Compared with the prior art, the beneficial effects of the present application are as follows: By detecting the first modulation signal in real time, information about key parameters such as signal amplitude, frequency, distortion degree, and signal-to-noise ratio can be obtained, thereby providing a basis for dynamically adjusting the second modulation signal and improving the stability and quality of the output signal. Moreover, the intermediate frequency signal processing unit can provide a variety of modulation method selections, and can generate an intermediate frequency signal simulating various modulations, enabling the intermediate frequency audio transceiver analysis module to select the most suitable modulation method according to specific application scenarios and requirements, thereby improving the flexibility and adaptability of intermediate frequency audio signal processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the intermediate frequency audio transceiver analysis module provided by an embodiment of the present application.

[0027] Figure 2 It is a schematic block diagram of the intermediate frequency signal processing unit provided by an embodiment of the present application.

[0028] Figure 3 It is a functional block diagram of the audio unit provided by an embodiment of the present application.

[0029] Figure 4 It is a circuit schematic diagram of the audio generation sub-unit provided by an embodiment of the present application.

[0030] Figure 5 It is a digital modulation structure diagram provided by an embodiment of the present application.

[0031] Figure 6 It is a digital demodulation structure diagram provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The present application will be further described in detail below in combination with test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter of the present application is limited to the following embodiments. All technologies implemented based on the content of the present application fall within the scope of protection of the present application.

[0033] In the description of the specific embodiments of the present application, unless otherwise specified, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", "side", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product / device / device is usually used and placed. These orientation or positional relationship terms are only for the convenience of describing the solution of the present application or simplifying the description in the specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, so it cannot be understood as a limitation to the present application.

[0034] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0035] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] Embodiment 1

[0037] Please refer to Figure 1 , Figure 1 , which is a schematic diagram of the intermediate-frequency audio transceiver analysis module provided by the embodiments of the present application. The intermediate-frequency audio transceiver analysis module 10 may include an intermediate-frequency signal processing unit 11 and an audio unit 12.

[0038] The intermediate-frequency signal processing unit is used to receive the intermediate-frequency signal sent from the radio frequency module, perform signal analysis on the intermediate-frequency signal to obtain the detection result of the intermediate-frequency signal; and generate and output a first demodulation signal based on the detection result;

[0039] The intermediate-frequency signal processing unit is further used to generate an intermediate-frequency signal simulating various modulations and output it externally;

[0040] The audio unit is used to, when receiving an audio signal, perform amplitude conditioning operation on the audio signal and then perform measurement and analysis to obtain the measurement result of the external audio signal;

[0041] The audio unit is further used to generate a standard audio signal with variable frequency and level and output it externally.

[0042] In the embodiments of the present application, the maximum amplitude of the intermediate-frequency input signal of the intermediate-frequency signal processing unit is 0 dBm, and the frequency range is 60 MHz to 80 MHz; the maximum amplitude of the intermediate-frequency output signal is -5 dBm, and the frequency range is 171 MHz ± 100 kHz. The input signal of the intermediate-frequency signal processing unit supports real-time fast Fourier transform (FFT).

[0043] In the embodiments of the present application, the intermediate frequency audio transceiver module can collect and process the input intermediate frequency signal; can generate an intermediate frequency signal output, can generate a standard audio source, and analyze external audio. It can improve the flexibility of intermediate frequency audio signal processing.

[0044] Embodiment 2

[0045] This embodiment is a specific implementation scheme for the intermediate frequency signal processing unit to work in the above Embodiment 1. Please refer to Figure 2 , Figure 2 which is a schematic block diagram of the intermediate frequency signal processing unit provided by the embodiments of the present application.

[0046] The intermediate frequency signal processing unit is configured to detect the first modulation signal during the process of modulating the intermediate frequency signal, obtain the signal detection result of the first modulation signal, and generate the second modulation signal based on the signal detection result.

[0047] Among them, the intermediate frequency signal processing receives the intermediate frequency signal from the radio frequency module, obtains the first modulation signal after signal conditioning and analog-to-digital conversion, and transmits the first modulation signal to the Field Programmable Gate Array (FPGA). The FPGA performs spectrum analysis on the processed first modulation signal, and extracts one or more detection results of the modulation degree, signal frequency, distortion degree, and signal-to-noise ratio of the modulation signal.

[0048] The FPGA can transmit indicators such as the signal amplitude, signal frequency, distortion degree, and signal-to-noise ratio of the first modulation signal to the PXIE host, and the PXIE host generates a corresponding intermediate frequency modulation signal generation instruction. When the FPGA receives the intermediate frequency modulation signal generation instruction, it generates any one of a single-carrier signal, an amplitude modulation signal (AM), a frequency modulation signal (FM), an upper sideband modulation signal (USSB), a lower sideband modulation signal (LSSB), and a phase modulation signal (PM). PM).

[0049] In the embodiments of the present application, the FPGA can also control, monitor, and measure and display each unit of the module. Among them, the AD sampling data of the intermediate frequency and audio can be read through the FD (Feedback) and audio (AUD) buses, and the serial peripheral interface (SPI) communication is used to control the intermediate frequency generation part and the audio generation part. Some peripheral circuits are controlled through the IO port, SPI, and the radio frequency analysis module, frequency signal measurement, intermediate frequency demodulation data reading, audio measurement circuit control, etc.

[0050] The A / D conversion of the intermediate frequency signal processing unit can use the AD9268. The AD9268 is a dual-channel analog-to-digital converter (ADC) with a sampling rate of 125M and a sampling accuracy of 16 bits, which can sample the input intermediate frequency signal and the input audio signal simultaneously.

[0051] The DDS (Direct Digital Synthesizer) of the intermediate frequency signal processing unit can use the chip AD9957. The FPGA generates 18-bit parallel data and transmits it to the AD9957. The DDS outputs a 171MHz intermediate frequency signal, which is output through XS3 after passing through a coupling transformer. As an orthogonal digital up-conversion chip (QDUC) launched by ADI Corporation, the AD9957 has a 14-bit D / A converter, 18 controllable I / Q channels, the output signal frequency and phase can be quickly programmed and switched, the device has a small volume, and it is simple and easy to perform up-conversion operations on signals. The AD9957 integrates a high-speed DDS and supports a QDUC with an output of 400MHz. It consists of a program register, an internal clock control logic A / D converter, an inverse sine filter, a data register, a parallel data timing and control logic, an interpolation cascaded integrator comb filter, and an SPI serial interface controller, etc.

[0052] After the FPGA parses the instructions, the FPGA generates two baseband signals of I and Q, and controls the AD9957 to perform D / A conversion and up-conversion by configuring the corresponding registers of the AD9957, generating a 171MHz intermediate frequency signal output.

[0053] In the embodiments of the present application, the intermediate frequency signal processing unit provided can obtain information on key parameters such as modulation degree, signal frequency, distortion degree, and signal-to-noise ratio by detecting the first modulation signal in real time, so as to provide a basis for dynamically adjusting the second modulation signal and improve the stability and quality of the output signal. And the intermediate frequency signal processing unit can provide a variety of modulation method selections, and can generate an intermediate frequency signal simulating various modulations, enabling the intermediate frequency audio transceiver analysis module to select the most suitable modulation method according to specific application scenarios and requirements, thereby improving the flexibility and adaptability of intermediate frequency audio signal processing.

[0054] Embodiment 3

[0055] This embodiment is a specific implementation of the audio unit in Embodiment 1 above. Please refer to Figure 3 , Figure 3 , which is a functional block diagram of the audio unit provided by the embodiment of the present application.

[0056] The audio unit may include an audio generation subunit, which is used to generate audio signals with a frequency of 10 Hz - 100 kHz. The frequency and output amplitude of the audio signals are based on soft panel control. Among them, the soft panel usually refers to a software-based user interface used to control and adjust various parameters of an audio device or system. This interface is usually virtual and is displayed through a computer screen or other display devices. Users can interact with the controls on the interface by clicking, dragging, or entering values, etc., so as to realize the control of audio signals.

[0057] Please refer to Figure 4 , Figure 4 , which is a schematic circuit diagram of the audio generation subunit provided by the embodiment of the present application.

[0058] The audio generation subunit applies two programmable waveform generators AD9833 to generate two low-frequency signals AF1 and AF2, and forms any one of the following three low-frequency signals.

[0059] a) Low-frequency signal generator AF1;

[0060] b) Low-frequency signal generator AF2;

[0061] c) Low-frequency signal generator AF1 + low-frequency signal generator AF2.

[0062] The circuit mainly includes: D1, D2, N11, D3, and some high-precision RC devices. The circuit can generate audio signals (10 Hz - 100 kHz) through D1, and then output the audio signal AF1 through the N11A operational amplifier. The circuit can generate audio signals (10 Hz - 100 kHz) through D2, and then output the audio signal AF2 through the N11B operational amplifier.

[0063] Two groups of audio signals are input into the digital-to-analog converter LTC1654 (D3), and the amplitude of the output signal is controlled by the control word sent by the FPGA, so as to realize the adjustment of the audio output level. Then, it passes through the gain control and filter composed of operational amplifiers, and finally is power-amplified through the triode push-pull circuit and then output.

[0064] The audio unit further includes an audio signal measurement subunit, which is configured to receive an external audio signal and perform signal measurement on the external audio signal. The signal measurement includes performing first amplitude conditioning on the external audio signal to obtain a first audio signal and a second audio signal, performing frequency measurement on the first audio signal, performing second amplitude conditioning on the second audio signal to obtain a third audio signal, performing signal sampling on the third audio signal to obtain sampled data, and then analyzing the sampled data.

[0065] Among them, after preliminary amplitude conditioning, the external audio signal is divided into two paths, namely a first audio signal and a second audio signal. The first audio signal passes through an amplifier limiter, is rectified by an inverter, and then enters the FPGA on the intermediate frequency board through a connector for frequency measurement. The second audio signal is further divided into two paths after further amplitude conditioning, namely a third audio signal and a fourth audio signal. After passing through a follower, the third audio signal is compared with the trigger level generated by a digital-to-analog converter through a comparator, and then enters the FPGA on the intermediate frequency board through a connector. The third audio signal enters the ADC on the intermediate frequency board through a connector for signal sampling to obtain sampled data, and then the sampled data is analyzed.

[0066] The audio unit further includes a demodulated audio subunit, which is configured to receive a demodulated audio signal, perform conditioning and filtering on the demodulated audio signal to obtain a first demodulated audio signal, a second demodulated audio signal, and a third demodulated audio signal. The first demodulated audio signal is used for external output, the second demodulated audio signal is used to adjust the volume and then output through a speaker, and the third demodulated audio signal is used to output to a headphone jack.

[0067] Among them, the demodulated audio is output by controlling a digital-to-analog converter through the FPGA on the intermediate frequency board, and after amplitude conditioning and filtering, it is divided into three paths, namely a first demodulated audio signal, a second demodulated audio signal, and a third demodulated audio signal. The first demodulated audio signal is externally output through a voltage follower composed of an operational amplifier by a BNC interface. The second demodulated audio signal is output to a speaker through an audio amplifier and the volume is adjusted by a variable resistor and then output through a speaker. The third demodulated audio signal is output to a headphone jack through an audio amplifier.

[0068] There are two paths of signals input for externally modulated audio. One path is through a BNC interface, and the other path is through a headphone jack to enter a microphone preamplifier, and finally, after being reduced in bias through an operational amplifier, it enters the intermediate frequency board through a connector for sampling.

[0069] The audio unit further includes a power supply, which can be composed of 5 DC-DC converters and 5 low-dropout linear regulators.

[0070] The audio unit provided in the embodiment of the present application can perform amplitude conditioning on the received audio signal, which can improve the stability and accuracy of the audio signal. By performing the first amplitude conditioning on the audio signal, the flexibility of signal processing is increased, enabling the module to process a wider range of signals. The basic frequency characteristics of the audio signal can be obtained through frequency measurement, and the amplitude of the audio signal can be compared and judged through level comparison, which can improve the processing efficiency of the audio signal and the accuracy of signal processing.

[0071] Embodiment 4

[0072] This embodiment is a practical application example of digital modulation by the intermediate frequency audio transceiver analysis module in Embodiment 1.

[0073] In the embodiment of the present application, the digital modulation of the intermediate frequency audio transceiver analysis module uses a fully digital signal processing method to generate a modulation signal. Please refer to Figure 5 , Figure 5 which is the digital modulation structure diagram provided in the embodiment of the present application.

[0074] In this solution, the entire modulation process can be controlled through the PCIE interface. There are four sources of modulation digital signals, namely PN code, fixed 4-bit code, equal 01 code, and file code stream that can be sent through PCIE. The file code stream needs to be cached in the DDR first and then read out cyclically.

[0075] After selecting one of the outputs in the MUX, digital modulation starts. First, the data source continuously generates data and sends it to the symbol rate control module, which will output the data at the control rate sent through PCIE to achieve the purpose of rate control.

[0076] Secondly, data modulation starts. Among them, 2FSK and 2ASK are separate modulation modules. Different from the other modulation methods, 2FSK can directly generate a modulation signal through the internal DDS of the FPGA under the control of PCIE; for 2ASK, only the fixed-frequency signal generated by the DDS needs to output the waveform for 1 according to the 01 code of the data source and output 0 for 0. For the other modulation methods, IQ orthogonal modulation is used. Only the data from the data source needs to be mapped into I-channel and Q-channel signals according to the corresponding modulation method by symbol, and then shaped filtering, interpolation to 100 MHz, and output through AD9957 are performed.

[0077] In the above implementation process, when performing digital modulation, the file bitstream is first cached in the DDR and then read out cyclically, which can improve the continuity and stability of the file bitstream. By using 2FSK and 2ASK as separate modulation modules, the modulation signals are directly generated by the internal DDS of the FPGA under the control of PCIE, or the fixed-frequency signals generated by the DDS are output according to the 01 codes of the data source, which can improve the modulation efficiency and accuracy.

[0078] Embodiment 5

[0079] This embodiment is a practical application example of digital demodulation by the intermediate-frequency audio transceiver analysis module in Embodiment 1. In the embodiments of the present application, digital demodulation uses a fully digital signal processing method to demodulate digital signals. Please refer to Figure 6 , Figure 6 which is the digital demodulation structure diagram provided by the embodiments of the present application.

[0080] The selection of the digital demodulation method is related to the modulation method. Different modulation methods require different demodulation methods. Figure 5 In, the methods are divided into two types. One type can use quadrature demodulation (the upper part of the figure), mainly including PSK, QAM, and GMSK; the other type needs to demodulate in a specific manner (the lower part of the figure), mainly including 2ASK and 2FSK.

[0081] In quadrature demodulation, regardless of which demodulation method is used, it is necessary to first perform 70MHz digital down-conversion, then perform 5MHz low-pass filtering, then decimate the signal to 4 times the symbol rate, and then pass through automatic gain control (AGC). Then, according to the modulation method of the signal, corresponding synchronous demodulation processing is performed.

[0082] For 2ASK, it is necessary to first take the absolute value of the signal, then perform 5MHz low-pass filtering, then isolate the DC signal, pass through a simple automatic gain control (AGC), then decimate the signal to 4 times the symbol rate, and then perform a simple zero-crossing synchronization to obtain the corresponding 2FSK demodulation signal.

[0083] For 2FSK, it is necessary to first perform 30 - 35MHz band-pass filtering and 25 - 30MHz band-pass filtering on the signal, then take the absolute value of the two filtered signals, then isolate the DC signals in the two absolute value signals, then subtract the two signals, pass through a simple automatic gain control (AGC), then decimate the signal to 4 times the symbol rate, and then perform a simple zero-crossing synchronization to obtain the corresponding 2FSK demodulation signal.

[0084] In the above implementation process, the corresponding demodulation method can be selected according to different modulation methods. When the modulation methods are PSK, QAM, GMSK, etc., orthogonal demodulation is selected. When the modulation methods are 2ASK, 2FSK, etc., a specific method is selected for demodulation, which can improve the flexibility and adaptability of digital demodulation.

[0085] In orthogonal demodulation, first perform 70 MHz digital down-conversion to reduce the signal frequency to a range suitable for subsequent processing. Then perform 5 MHz low-pass filtering to remove high-frequency noise and interference and improve the signal-to-noise ratio of the signal. Decimating the signal to 4 times the symbol rate helps improve the accuracy of subsequent synchronous demodulation processing. Automatic gain control (AGC) is used to adjust the amplitude of the signal to keep it within an appropriate range and avoid demodulation failure caused by too large or too small signal amplitude.

[0086] For specific modulation methods such as 2ASK and 2FSK, by taking the absolute value of the 2ASK signal and then performing low-pass filtering and simple AGC processing, and then decimating the signal and performing simple zero-crossing synchronization; and by performing band-pass filtering, taking the absolute value, isolating the DC signal, taking the difference, etc. on the 2FSK signal, the accuracy of the demodulated signal can be improved.

[0087] Based on the same application concept, the embodiment of the present application further provides an intermediate frequency audio transceiver analysis device, and the intermediate frequency audio transceiver analysis device includes the intermediate frequency audio transceiver analysis module in the description content.

[0088] Based on the same application concept, the embodiment of the present application further provides an intermediate frequency audio transceiver analysis method, which is applied to the intermediate frequency audio transceiver analysis module, and the intermediate frequency audio transceiver analysis module includes an intermediate frequency signal processing unit and an audio unit.

[0089] The method may include:

[0090] Receiving an intermediate frequency signal sent from a radio frequency module, performing signal analysis on the intermediate frequency signal to obtain a detection result of the intermediate frequency signal; and generating and outputting a first demodulated signal based on the detection result;

[0091] When an audio signal is received, performing amplitude conditioning operation on the audio signal and then performing measurement analysis to obtain a measurement result of the external audio signal;

[0092] Generating an intermediate frequency signal simulating multiple modulations and outputting it externally, and generating a standard audio signal with variable frequency and level and outputting it externally.

[0093] Optionally, in the case of receiving an intermediate frequency signal transmitted from a radio frequency module, signal modulation is performed on the intermediate frequency signal to obtain a first modulation signal, and signal detection is performed on the first modulation signal, so as to output a second modulation signal based on the detection result of the signal detection, which may include:

[0094] During the process of performing signal modulation on the intermediate frequency signal, signal detection is performed on the first modulation signal to obtain the signal detection result of the first modulation signal, and the second modulation signal is generated based on the signal detection result.

[0095] Optionally, the intermediate frequency modulation signal includes any one of a single carrier signal, an amplitude modulation signal, a frequency modulation signal, an upper sideband modulation signal, a lower sideband modulation signal, and a phase modulation signal.

[0096] Optionally, the signal detection result of the first modulation signal includes one or more detection results of the modulation depth of the modulation signal, the signal frequency, the distortion degree, and the signal-to-noise and distortion ratio.

[0097] In the intermediate frequency audio transceiver analysis method provided in the embodiments of the present application, by performing real-time detection on the first modulation signal, information on key parameters such as the modulation depth, signal frequency, distortion degree, and signal-to-noise and distortion ratio is obtained, thereby providing a basis for dynamically adjusting the second modulation signal and improving the stability and quality of the output signal. Moreover, the intermediate frequency signal processing unit can provide a variety of modulation method selections, enabling the intermediate frequency audio transceiver analysis module to select the most suitable modulation method according to specific application scenarios and requirements, thereby improving the flexibility and adaptability of signal processing.

[0098] Optionally, the method may further include:

[0099] Receiving an external audio signal and performing signal measurement on the external audio signal. The signal measurement includes performing first amplitude conditioning on the external audio signal to obtain a first audio signal and a second audio signal, performing frequency measurement on the first audio signal, performing second amplitude conditioning on the second audio signal to obtain a third audio signal, performing signal sampling on the third audio signal to obtain sampling data, and then analyzing the sampling data.

[0100] Optionally, the method may further include:

[0101] Receiving a demodulated audio signal, and performing conditioning filtering on the demodulated audio signal to obtain a first demodulated audio signal, a second demodulated audio signal, and a third demodulated audio signal. The first demodulated audio signal is used for external output, the second demodulated audio signal is used for adjusting the volume and then output through a speaker, and the third demodulated audio signal is used for output to a headphone jack.

[0102] In the above implementation process, by conditioning the amplitude of the received audio signal, the stability and accuracy of the audio signal can be improved. Through the first amplitude conditioning of the audio signal, the flexibility of signal processing is increased, enabling the module to process a wider range of signals. The basic frequency characteristics of the audio signal can be obtained through frequency measurement, and the amplitude of the audio signal can be compared and judged through level comparison, which can improve the processing efficiency of the audio signal and the accuracy of signal processing.

[0103] It should be understood that when the respective sub-units of the units provided in the above embodiments perform intermediate-frequency audio transceiver analysis, only the division of the above-described functional modules in the above description is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0104] The functional modules in the above embodiments can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction and do not limit the protection scope of the embodiments of the present application.

[0105] Based on the same inventive concept, an embodiment of the present application further provides a computer device, which may include a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method described in the above description is implemented.

[0106] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by the processor, the method described in the above description is implemented.

[0107] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements 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 application, and should all be included in the protection scope of the present application.

Claims

1. An intermediate frequency audio transceiver analysis module, characterized in that: Including intermediate frequency signal processing unit and audio unit: The intermediate frequency signal processing unit is used to receive the intermediate frequency signal sent from the radio frequency module, perform signal analysis on the intermediate frequency signal, obtain a detection result of the intermediate frequency signal; and generate and output a first demodulated signal based on the detection result; The intermediate frequency signal processing unit is also used to generate an intermediate frequency signal simulating multiple modulations and output it externally; The audio unit is used to perform amplitude conditioning operation on the audio signal and then perform measurement and analysis to obtain a measurement result of the external audio signal when the audio signal is received; The audio unit is also used to generate a standard audio signal with changeable frequency and level, and output it externally.

2. The intermediate frequency audio transceiver analysis module according to claim 1, characterized in that: The intermediate frequency signal processing unit is configured to perform signal detection on the first modulation signal during signal modulation on the intermediate frequency signal, obtain a signal detection result of the first modulation signal, and generate the second modulation signal based on the signal detection result.

3. The intermediate frequency audio transceiver analysis module according to claim 1, characterized in that: The intermediate frequency modulation signal generated by the intermediate frequency signal processing unit includes any one of a single carrier signal, an amplitude modulation modulation signal, a frequency modulation signal, an upper sideband modulation signal, a lower sideband modulation signal and a phase modulation signal.

4. The intermediate frequency audio transceiver analysis module according to claim 1, characterized in that: The signal detection result of the first modulation signal includes one or more detection results of the modulation signal's modulation degree, signal frequency, distortion, and signal-to-noise index.

5. The intermediate frequency audio transceiver analysis module according to claim 1, characterized in that: The audio unit comprises an audio generation subunit, which is used to generate an audio signal of 10 Hz-100 kHz, and the frequency and output amplitude of the audio signal are controlled based on a soft panel.

6. The intermediate frequency audio transceiver analysis module according to claim 5, characterized in that: The audio unit also includes an audio signal measuring subunit, which is used to receive an external audio signal and perform signal measurement on the external audio signal. The signal measurement includes performing a first amplitude conditioning on the external audio signal to obtain a first audio signal and a second audio signal, performing frequency measurement on the first audio signal, performing a second amplitude conditioning on the second audio signal to obtain a third audio signal, performing signal sampling on the third audio signal to obtain sampling data, and then analyzing the sampling data.

7. The intermediate frequency audio transceiver analysis module according to any one of claims 5 to 6, characterized in that: The audio unit also includes a demodulated audio subunit, which is used to receive a demodulated audio signal, and to obtain a first demodulated audio signal, a second demodulated audio signal and a third demodulated audio signal after conditioning and filtering the demodulated audio signal. The first demodulated audio signal is used for external output, the second demodulated audio signal is used for adjusting the volume and then outputting it through a speaker, and the third demodulated audio signal is used for outputting it to a headphone interface.

8. The intermediate frequency audio transceiver analysis module according to claim 1, characterized in that: The audio unit also includes a power supply consisting of five DC-DC converters and five low-dropout linear regulators.

9. An intermediate frequency audio transceiver analysis device, characterized in that: It comprises the intermediate frequency audio transceiver analysis module as described in any one of claims 1 to 7.

10. A method for analyzing intermediate frequency audio transmission and reception, characterized in that: Applied to an intermediate frequency audio transceiver analysis module, the intermediate frequency audio transceiver analysis module includes an intermediate frequency signal processing unit and an audio unit; The method comprises: Receiving an intermediate frequency signal sent from a radio frequency module, performing signal analysis on the intermediate frequency signal to obtain a detection result of the intermediate frequency signal; and generating and outputting a first demodulated signal based on the detection result; When an audio signal is received, performing amplitude conditioning on the audio signal and then measuring and analyzing the audio signal to obtain a measurement result of the external audio signal; Generate an intermediate frequency signal simulating multiple modulations and output it externally, and generate a standard audio signal with changeable frequency and level and output it externally.

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