Signal transmitter and electronic equipment

Abstract

The invention provides a signal transmitter and electronic equipment. The signal transmitter comprises a control module, a radio frequency module and a modulation module, the control module is used for receiving the original signal and the control instruction, generating a modulation related signal according to modulation related parameters represented by the original signal and the control instruction, and transmitting the modulation related signal to the modulation module; the modulation module is used for generating an amplitude modulation signal according to the modulation related signal and sending the amplitude modulation signal to the radio frequency module; the radio frequency module is used for modulating the amplitude of the carrier signal by adopting the amplitude modulation signal to obtain a target signal; the carrier signal is generated based on carrier related parameters represented by the control instruction. According to the signal transmitter provided by the invention, the modulation mode can be changed through the control instruction, the appropriate modulation mode can be selected in different communication environments to adapt to the communication scene, higher modulation precision can be obtained, and the communication quality can be improved. According to the signal transmitter, the modulation mode can be flexibly changed, and the integration level, the convenience and the modulation precision of the transmitter are improved.

Description

Technical Field

[0001] The present disclosure relates to the field of shortwave transmitters, and in particular to a signal transmitter and an electronic device. Background Art

[0002] In the field of shortwave transmitters, modulation technology is one of the key links, which directly affects the performance of the transmitter and the quality of signal transmission. The traditional modulation method of shortwave transmitters is relatively single and difficult to meet diverse communication needs. With the continuous development of communication technology, higher requirements are put forward for the integration of the functions of shortwave transmitters. However, although some existing transmitters have certain modulation functions, generally one transmitter only supports one modulation mode; for transmitters that support multiple modulation modes, there are deficiencies in aspects such as modulation accuracy and convenience of mode switching, and they cannot effectively implement multiple efficient modulation modes, which limits the application range and performance improvement of shortwave transmitters. Summary of the Invention

[0003] Embodiments of the present disclosure provide a signal transmitter and an electronic device to solve the problems of low mode integration, poor modulation accuracy, and inconvenient mode switching of existing transmitters.

[0004] Based on the above problems, in a first aspect, embodiments of the present disclosure provide a signal transmitter, including: a control module, a radio frequency module, and a modulation module; The control module is configured to receive an original signal and a control instruction, generate a modulation-related signal according to the modulation-related parameters characterized by the original signal and the control instruction, and transmit the modulation-related signal to the modulation module; The modulation module is configured to generate an amplitude-modulated signal according to the modulation-related signal and send the amplitude-modulated signal to the radio frequency module; The radio frequency module is configured to modulate the amplitude of a carrier signal with the amplitude-modulated signal to obtain a target signal; the carrier signal is generated based on the carrier-related parameters characterized by the control instruction.

[0005] In combination with the first aspect, in a possible implementation manner, the original signal includes: a first audio signal; The control module includes: an audio processing module, a signal processing module, and a modulation-related signal generation module; The audio processing module is configured to perform digital conversion on the input first audio signal to obtain a second audio signal; The signal processing module includes multiple signal processing units, which are used to determine a modulation mode according to modulation-related parameters represented by the control instruction, call the signal processing units according to the call logic corresponding to the modulation mode, and convert the second audio signal into a third audio signal; and send the carrier-related parameters represented by the control instruction to a relevant module to generate a carrier signal; The modulation-related signal generation module is used to modulate the third audio signal with a preset reference level to obtain a modulated reference level, and output the modulated reference level to the modulation module.

[0006] Combined with the first aspect, in a possible implementation manner, the control module further includes: a carrier-related signal generation module; the relevant module is the carrier-related signal generation module; The carrier-related signal generation module is used to generate a carrier signal according to carrier-related parameters and output the carrier signal to the radio frequency module; Combined with the first aspect, in a possible implementation manner, the relevant module is a radio frequency module; The radio frequency module is further used to generate a carrier signal according to the carrier-related parameters.

[0007] Combined with the first aspect, in a possible implementation manner, the modulation mode is a double sideband mode; the signal processing unit includes: a calculation unit; the signal processing module further includes: a storage module; The signal processing module is used to call the calculation unit to obtain the modulation algorithm of the double sideband mode from the storage module; generate a first carrier level through the modulation algorithm of the double sideband mode according to a preset carrier power; and add the first carrier level to the second audio signal to obtain a third audio signal.

[0008] Combined with the first aspect, in a possible implementation manner, the modulation mode is a floating carrier mode; the signal processing unit includes: a calculation unit, a rectification unit, a delay unit, and a detection unit; the signal processing module further includes: a storage module; The signal processing module is used to call the rectification unit to rectify the second audio signal and determine the amplitude of the second audio signal; call the detection unit to determine the peak data of the second audio signal according to the amplitude of the second audio signal; call the calculation unit to call the modulation algorithm of the floating carrier mode from the storage module; and generate a second carrier level through the modulation algorithm of the floating carrier mode according to the peak data of the second audio signal; add the second audio signal with the delay adjusted by the delay unit to the second carrier level to obtain a third audio signal.

[0009] In combination with the first aspect, in a possible implementation manner, the modulation mode is an amplitude companding mode; the signal processing unit includes: a calculation unit, a rectification unit, a delay unit, a detection unit, and a filtering unit; the signal processing module further includes: a storage module; The signal processing module is configured to call the rectification unit to perform rectification processing on the second audio signal and determine the amplitude of the second audio signal; call the detection unit to determine the peak data of the second audio signal according to the amplitude of the second audio signal; call the calculation unit to call the modulation algorithm of the amplitude companding mode from the storage module; and obtain a third carrier level through the modulation algorithm of the amplitude companding mode according to the peak data of the second audio signal; wherein, the third carrier level is inversely proportional to the peak data; multiply the second audio signal obtained by adding the DC level in the control instruction and adjusting the delay by the delay unit by the third carrier level signal filtered by the filtering unit to obtain a third audio signal.

[0010] In combination with the first aspect, in a possible implementation manner, the original signal includes: an orthogonal signal; The control module includes: an orthogonal signal decoupling module, a signal processing module, a carrier-related signal generation module, and a modulation-related signal generation module; The orthogonal signal decoupling module is configured to separate the phase and amplitude in the received orthogonal signal to obtain an amplitude signal and a phase signal respectively; The signal processing module includes a plurality of signal processing units, and is configured to determine a modulation mode according to the modulation-related parameters represented by the control instruction, call the signal processing unit according to the call logic corresponding to the modulation mode, convert the phase signal into a phase delay signal, and obtain an amplitude modulation signal according to the amplitude signal; and output the phase delay signal to the carrier-related signal generation module and output the amplitude modulation signal to the modulation-related signal generation module; The carrier-related signal generation module is configured to modulate the phase of the phase delay signal to obtain the carrier signal and output the carrier signal to the radio frequency module; The modulation-related signal generation module is configured to modulate the amplitude modulation signal with a preset reference level to obtain a modulation reference level and output the modulation reference level to the modulation module.

[0011] In combination with the first aspect, in a possible implementation manner, the modulation mode is a digital broadcast mode; the signal processing unit includes: a calculation unit and a delay unit; the signal processing module further includes: a storage module; The signal processing module is configured to call the delay unit to adjust the phase signal by a delay to obtain the phase-delayed signal; call the calculation module to call the modulation algorithm of the digital broadcast mode from the storage module; and generate the amplitude modulation signal according to the amplitude signal through the modulation algorithm of the digital broadcast mode.

[0012] In a possible implementation manner in combination with the first aspect, the modulation module includes: a rectifier, a modulator, and a filter; The rectifier is connected to the power supply and is configured to filter the noise in the power supply and provide a DC level for the modulation module; The modulator is configured to divide the DC level into a plurality of stepped levels, and superimpose the stepped levels according to a modulation reference level to obtain a stepped reference signal; The filter is configured to filter out the stepped ripple in the stepped reference signal to obtain an amplitude-modulated signal, and output the amplitude-modulated signal to the radio frequency module.

[0013] In a possible implementation manner in combination with the first aspect, the radio frequency module includes: a carrier signal processing link and a signal output link; The carrier signal processing link is configured to generate a carrier signal according to the carrier-related parameters when the signal processing module sends the carrier-related parameters to the radio frequency module, and rectify, filter, and amplify the carrier signal and then output the carrier signal to the signal output link; The carrier signal processing link is further configured to rectify, filter, and amplify the carrier signal and then output the carrier signal to the signal output link when the signal processing module outputs the carrier signal to the radio frequency module; The signal output link is configured to modulate the amplitude of the carrier signal based on the amplitude-modulated signal to obtain the target signal, and output the target signal to the antenna terminal of the signal transmitter.

[0014] In a second aspect, an embodiment of the present disclosure provides an electronic device, including: the signal transmitter according to the first aspect or any possible implementation manner in combination with the first aspect.

[0015] The beneficial effects of the embodiments of the present disclosure include: Embodiments of the present disclosure provide a signal transmitter and an electronic device, including: a control module, a radio frequency module, and a modulation module; the control module is configured to receive an original signal and a control instruction, generate a modulation-related signal according to the modulation-related parameters represented by the original signal and the control instruction, and transmit the modulation-related signal to the modulation module; the modulation module is configured to generate an amplitude-modulated signal according to the modulation-related signal and send the amplitude-modulated signal to the radio frequency module; the radio frequency module is configured to modulate the amplitude of a carrier signal with the amplitude-modulated signal to obtain a target signal; the carrier signal is generated based on the carrier-related parameters represented by the control instruction. The signal transmitter provided by the present disclosure can change the modulation mode through a control instruction, so as to select a suitable modulation mode to adapt to the current communication scenario in different communication environments, so as to obtain higher modulation accuracy and improve communication quality. Compared with the traditional short-wave transmitter with a single modulation method in the related art, the present signal transmitter can flexibly change the modulation mode, improving the integration, convenience and modulation accuracy of the transmitter. Description of the Drawings

[0016] Figure 1 Schematic diagram of the structure of the signal transmitter provided by the embodiments of the present disclosure; Figure 2 Schematic diagram of the structure of a control module provided by the embodiments of the present disclosure; Figure 3 Schematic diagram of the structure of another control module provided by the embodiments of the present disclosure; Figure 4 Schematic diagram of the call logic of the double-sideband modulation mode provided by the embodiments of the present disclosure; Figure 5 Schematic diagram of the call logic of the floating carrier modulation mode provided by the embodiments of the present disclosure; Figure 6 Schematic diagram of the call logic of the amplitude companding modulation mode provided by the embodiments of the present disclosure; Figure 7 Schematic diagram of the structure of yet another control module provided by the embodiments of the present disclosure; Figure 8 Schematic diagram of the call logic of the digital broadcast modulation mode provided by the embodiments of the present disclosure; Figure 9 Schematic diagram of the structure of the modulation module provided by the embodiments of the present disclosure; Figure 10 Schematic diagram of the waveform of the stepped reference signal provided by the embodiments of the present disclosure; Figure 11 Schematic diagram of the structure of the radio frequency module provided by the embodiments of the present disclosure. Detailed Embodiments

[0017] Embodiments of the present disclosure provide a signal transmitter and an electronic device. The preferred embodiments of the present disclosure will be described below in conjunction with the accompanying drawings of the specification. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. And without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0018] Embodiments of the present disclosure provide a signal transmitter, as Figure 1 shown, including: a control module 1, a radio frequency module 2, and a modulation module 3; The control module 1 is configured to receive an original signal and a control instruction, generate a modulation-related signal according to the modulation-related parameters represented by the original signal and the control instruction, and transmit the modulation-related signal to the modulation module 3; The modulation module 3 is configured to generate an amplitude-modulated signal according to the modulation-related signal and send the amplitude-modulated signal to the radio frequency module 2; The radio frequency module 2 is configured to modulate the amplitude of the carrier signal with the amplitude-modulated signal to obtain a target signal; the carrier signal is generated based on the carrier-related parameters represented by the control instruction.

[0019] In the embodiments of the present disclosure, the signal transmitter may be a short-wave transmitter, and the frequency range of the output target signal may be within and can be applied to fields such as international broadcasting and long-distance communication.

[0020] The control module 1 may be an electronic device composed of a field-programmable gate array (FPGA), a complex programmable logic device (CPLD), an analog-to-digital converter, a digital-to-analog converter, a buffer, a non-volatile memory (NVM) chip, and an asynchronous sampling rate converter (ASRC) chip, etc., and has functions such as analog-to-digital / digital-to-analog conversion, signal sampling, data storage, data calculation, communication, and signal generation.

[0021] A variety of modulation-related parameters corresponding to different modulation modes can be pre-stored in the control module 1. Each modulation-related parameter corresponds to a different control instruction. The control module 1 can call different modulation-related parameters according to the received control instruction, and generate a modulation-related signal based on the original signal input to the control module 1. The modulation-related signal can be a signal obtained by processing the original signal and containing the target information in the original signal. The control instruction can be an instruction signal transmitted by the upper computer of the signal transmitter to change the modulation module 3 of the signal transmitter; or it can be an instruction signal transmitted from other modules in the signal transmitter to the control module 1.

[0022] The modulation module 3 can be a Pulse Step Modulation (PSM) modulator, which amplitude-modulates the modulation-related signal by the pulse step modulation method, and provides carrier power and modulation power for the signal to obtain an amplitude-modulated signal.

[0023] The radio frequency module 2 can modulate the amplitude of the carrier signal according to the amplitude-modulated signal, so as to obtain the target signal for transmission. The carrier signal in the radio frequency module 2 can be generated by the radio frequency module 2 according to the corresponding carrier signal parameters (including the frequency, amplitude, phase, etc. of the carrier signal) provided by the control module 1; or the control module 1 can directly generate the corresponding carrier signal and output the carrier signal to the radio frequency module 2.

[0024] The signal transmitter provided by the present disclosure can change the modulation mode through a control instruction, so as to select a suitable modulation mode to adapt to the current communication scenario in different communication environments, in order to obtain higher modulation accuracy and improve communication quality. Compared with the traditional short-wave transmitter with a single modulation method in the related art, this signal transmitter can flexibly change the modulation mode, improving the integration, convenience and modulation accuracy of the transmitter.

[0025] In another embodiment provided by the present disclosure, the original signal includes: a first audio signal; The control module 1, as Figure 2 shown, includes: an audio processing module 11, a signal processing module 12, and a modulation-related signal generation module 13; The audio processing module 11 is used to perform digital conversion on the input first audio signal to obtain a second audio signal; The signal processing module 12 includes a plurality of signal processing units, which are used to determine the modulation mode according to the modulation-related parameters represented by the control instruction, and call the signal processing units according to the call logic corresponding to the modulation mode to convert the second audio signal into a third audio signal; and send the carrier-related parameters represented by the control instruction to relevant modules to generate a carrier signal; The modulation-related signal generation module 13 is configured to modulate the third audio signal with a preset reference level to obtain a modulated reference level, and output the modulated reference level to the modulation module 3.

[0026] In the embodiments of the present disclosure, the first audio signal may be an electrical signal (i.e., an analog audio signal) converted from a sound wave signal captured by a microphone or a sensor, etc., or a digital audio signal. The audio processing module 11 may sample and quantize the analog audio signal according to a preset sampling rate and quantization bit depth, and after preprocessing (such as digital filtering and gain control, etc.), obtain a second audio signal. Here, the second audio signal may be a baseband AC signal without a DC component. For the case where the first audio signal is a digital audio signal, preprocessing may be directly performed on the first audio signal to obtain the second audio signal.

[0027] The signal processing module 12 includes a plurality of signal processing units, and each signal processing unit may perform different signal processing tasks, such as: processing the signal through a modulation algorithm, adjusting the phase of the signal, rectifying the signal, and detecting the signal waveform, etc. The signal processing module 12 may select different modulation modes according to the received control instruction, and each modulation mode corresponds to a different call logic. The signal processing module 12 may, according to the call logic, call the corresponding signal processing unit to participate in the corresponding signal processing process, and call the modulation algorithm corresponding to the modulation mode for the signal processing unit that needs to perform modulation algorithm operations, and convert the second audio signal into a third audio signal.

[0028] Different modulation modes may correspond to different carrier signals, and the parameters of the carrier signal corresponding to each modulation mode may be carried by the control instruction input to the signal processing module 12, or the carrier signal parameters stored in advance may be retrieved according to the control instruction. The signal processing module 12 may generate corresponding carrier-related parameters according to different modulation modes, and send them to the relevant module for generating the carrier signal, and the relevant module generates the corresponding carrier signal. The carrier-related parameters may include information characterizing the signal characteristics such as the frequency, amplitude, and phase of the carrier.

[0029] The modulation-related signal generation module 13 may be used to set and control the reference voltage or current in the modulation process, which may directly affect the dynamic range of the signal. The signal processing module 12 further outputs the third audio signal to the modulation-related signal generation module 13, provides a predetermined reference level for the third audio signal, standardizes the generated signal, so as to ensure that the signal matches the input dynamic range of the subsequent device during the modulation process, and make the whole process controllable and distortion-free.

[0030] In another embodiment provided by the present disclosure, as Figure 2As shown, the control module 1 further includes: a carrier-related signal generation module 14; the related module is the carrier-related signal generation module 14; The carrier-related signal generation module 14 is configured to generate a carrier signal according to carrier-related parameters and output the carrier signal to the radio frequency module 2; In the embodiment of the present disclosure, the carrier-related signal generation module 14 may be a circuit composed of elements including a frequency synthesizer, which can generate a corresponding carrier signal according to carrier-related parameters. Among them, the frequency synthesizer can generate a corresponding signal through the method of direct digital synthesis (DDS). DDS is a method of generating signals through signal processing technology. Its core idea is to use digital circuits to generate a phase sequence, then map the phase to the corresponding amplitude value, and finally generate the corresponding signal waveform accordingly to obtain the target carrier signal.

[0031] In another embodiment provided by the present disclosure, as Figure 3 shown, the related module is the radio frequency module 2; The radio frequency module 2 is further configured to generate a carrier signal according to carrier-related parameters.

[0032] In the embodiment of the present disclosure, the radio frequency module 2 may include a frequency synthesizer for generating a carrier signal according to carrier-related parameters. The frequency synthesizer may be disposed at the input stage of the carrier signal processing link in the radio frequency module and generate a corresponding carrier signal according to carrier-related parameters through the DDS method and input it into the subsequent carrier signal processing link to process the signal.

[0033] The signal processing module 12 can generate carrier-related parameters according to the received control instruction and directly send the carrier-related parameters to the radio frequency module 2. The radio frequency module 2 can directly generate a carrier signal according to the received carrier-related parameters.

[0034] In another embodiment provided by the present disclosure, the modulation mode is the double sideband mode; as Figure 4 shown, the signal processing unit includes: a calculation unit 121; the signal processing module 12 further includes: a storage module 122; The signal processing module 12 is configured to call the calculation unit 121, obtain the modulation algorithm of the double sideband mode from the storage module 122; generate a first carrier level through the modulation algorithm of the double sideband mode according to a preset carrier power; and add the first carrier level to the second audio signal to obtain a third audio signal.

[0035] In an embodiment of the present disclosure, the double sideband (DSB) mode can be an amplitude modulation technique. Its core is to modulate the amplitude of the carrier wave by the baseband signal to generate a signal carrying the upper and lower sidebands. The double sideband mode can be applicable to communication scenarios that require high-power transmission and have low requirements for signal bandwidth.

[0036] When the signal transmitter needs to communicate, a control instruction and the audio signal to be transmitted (i.e., the first audio signal) can be issued by an operator or a host computer. The audio signal is processed by the audio processing module 11 to obtain a digitized first audio signal (i.e., the second audio signal), and the second audio signal is sent to the signal processing module 12. After the control instruction is input into the signal processing module 12, the signal processing module 12 calls the double sideband mode to modulate the second audio signal according to the control instruction. The signal processing module 12 calls the modulation algorithm of the double sideband mode stored in the storage module 122. The modulation algorithm of the double sideband mode can include parameters such as configuring the carrier frequency and modulation index. The calculation unit 121 can generate a corresponding carrier DC level (i.e., the first carrier level) according to the modulation algorithm. The carrier DC level can be a DC component superimposed on the signal during the modulation process. Adding the obtained first carrier level and the second audio signal can obtain a third audio signal. The expression of the third audio signal can be: . Wherein is the second audio signal, is the third audio signal, is the carrier level. And the obtained third audio signal is sent to the modulation-related signal generation module 13.

[0037] The signal processing module 12 can also generate the required carrier signal parameters according to the control instruction, send the corresponding carrier signal parameters to the carrier-related signal generation module 14 or directly transmit them to the radio frequency module 2, and they generate the carrier signal. The carrier signal generated for the double sideband mode can be , and this carrier signal is processed by the subsequent link of the radio frequency module 2 to obtain a radio frequency excitation signal that matches the target band (the transmitter provided by the present disclosure can be ).

[0038] In another embodiment provided by the present disclosure, the modulation mode is a floating carrier mode; as Figure 5 shown, the signal processing unit includes: a calculation unit 121, a rectification unit 123, a delay unit 124, and a detection unit 125; the signal processing module 12 further includes: a storage module 122; The signal processing module 12 is configured to call the rectification unit 123 to rectify the second audio signal and determine the amplitude of the second audio signal; call the detection unit 125 to determine the peak data of the second audio signal according to the amplitude of the second audio signal; call the calculation unit 121 to call the modulation algorithm of the floating carrier mode from the storage module 122; and generate a second carrier level according to the peak data of the second audio signal through the modulation algorithm of the floating carrier mode; add the second audio signal after being adjusted by the delay unit 124 with the second carrier level to obtain a third audio signal.

[0039] In an embodiment of the present disclosure, the floating carrier (DCC, Dynamic Carrier Control) mode may be a modulation method for controlling the carrier level. This modulation method can adjust the power of the carrier signal according to the intensity of the audio signal. In the absence of audio signal activity, the carrier power will be significantly reduced. The main advantage of the floating carrier mode is that it can save power and cost, and at the same time can be applicable to complex communication environments.

[0040] After the control instruction input signal is processed by the signal processing module 12, the signal processing module 12 calls the floating carrier mode to modulate the second audio signal according to the control instruction. After the second audio signal is input to the signal processing module 12, it is divided into two paths. One of the second audio signals is first input to the rectification unit 123 to rectify the second audio signal. Since the digitized audio signal is usually represented by discrete sample values, the purpose of the rectification unit 123 is to flip the negative half-axis of the audio signal to the positive half-axis, which can be achieved by taking the absolute value of each sample value. Assume the original digital audio signal is , and the rectified signal can be expressed as , where represents the serial number of the sample value in the digital audio signal. For the rectified signal, the amplitude of the signal can be determined by the mean method or the root mean square method, and the detected amplitude is sent to the calculation unit 121.

[0041] Furthermore, the detection unit 125 can detect the peak of the second audio signal and send the detected signal peak to the calculation unit 121. The calculation unit 121 can determine the peak-to-average ratio of the second audio signal according to the amplitude and the peak, and determine the characteristics of the second audio signal according to the peak-to-average ratio, so as to dynamically generate a corresponding second carrier level, so that the subsequent generated signal matches the dynamic range of the device, avoid over-compressing or clipping the audio signal, and at the same time ensure that the signal does not exceed the quantization range of the device.

[0042] Another second audio signal enters the delay unit 124. Since there will be a delay between the second audio signal and the second carrier level due to the signal transmission path, the delay unit 124 compensates for the time difference between the two to ensure that they are synchronized when added, maintain phase consistency, and avoid waveform distortion caused by inconsistent phases.

[0043] Finally, the adjusted second audio signal and the second carrier signal after delay are added to obtain the third audio signal, and the third audio signal is output to. Here, the third audio signal can be an amplitude-compressed audio signal.

[0044] Similarly, the signal processing module 12 can also generate carrier signal parameters including information such as amplitude, frequency, and phase for the floating carrier mode according to the control instruction, and the carrier signal is generated by the carrier-related signal generation module 14 or the radio frequency module 2. The carrier signal for the floating carrier mode can be , where represents the signal value at time ; : is the signal amplitude at time t; : is the signal frequency at time τ; : is the signal phase at time t.

[0045] In another embodiment provided by the present disclosure, the modulation mode is the amplitude companding mode; as Figure 6 shown, the signal processing unit includes: a calculation unit 121, a rectification unit 123, a delay unit 124, a detection unit 125, and a filtering unit 126; the signal processing module 12 further includes: a storage module 122; The signal processing module 12 is used to call the rectification unit 123 to rectify the second audio signal and determine the amplitude of the second audio signal; call the detection unit 125 to determine the peak data of the second audio signal according to the amplitude of the second audio signal; call the calculation unit 121 to call the modulation algorithm of the amplitude companding mode from the storage module 122; and according to the peak data of the second audio signal, obtain the third carrier level through the modulation algorithm of the amplitude companding mode; where the third carrier level is inversely proportional to the peak data; multiply the second audio signal added with the DC level in the control instruction and adjusted for delay by the delay unit by the third carrier level signal filtered by the filtering unit 126 to obtain the third audio signal.

[0046] In the embodiments of the present disclosure, the amplitude companding (AMC) mode is an amplitude modulation technique that combines compression and expansion processing, aiming to optimize the dynamic range of the signal and improve the transmission quality. It can be applied to communication scenarios with high requirements for signal-to-noise ratio. For the signal transmitting end, it is necessary to first perform non-linear compression (amplifying small signals and reducing large signals) on the signal to be transmitted, and then perform amplitude modulation.

[0047] After the control instruction input signal is processed by the signal processing module 12, the signal processing module 12 modulates the second audio signal according to the control instruction by invoking the amplitude companding mode. After the second audio signal is input to the signal processing module 12, it is divided into two paths. One path of the second audio signal passes through the rectification unit 123 and the detection unit 125. After rectification, determining the amplitude and determining the peak value, the calculation unit 121 selects the corresponding carrier level value in the preset companding curve table according to the peak value of the second audio signal. The larger the input peak value, the smaller the output carrier level. For small signals, a high level can be output to improve the anti-noise performance of small signals; for large signals, a low level can be output to avoid over-modulation and reduce the peak-to-average power ratio. The companding curve can adopt a compression function similar to or or a custom optimized curve. The generated third carrier level is input to the filtering unit 126. The filtering unit 126 can be a low-pass filter, which can smooth the mutations in the third carrier level and prevent the introduction of modulation distortion.

[0048] For the other path of the second audio signal, first, it is added to the DC level in the control instruction. By adding the DC level in the control instruction to the second audio signal, it is possible to avoid the amplitude of the audio signal from crossing zero or being negative, prevent linear distortion, and optimize the dynamic range of the audio signal. Then the signal is input to the delay unit 124. After the delay is adjusted by the delay unit 124, it is multiplied by the filtered third audio signal to obtain the third audio signal.

[0049] Similarly, the signal processing module 12 can also generate carrier signal parameters including amplitude, frequency, phase, etc. for the companding mode according to the control instruction, and the carrier signal is generated by the carrier-related signal generation module 14 or the radio frequency module 2. The carrier signal for the companding mode can be generated as , where, is the signal amplitude; is the signal frequency; is the time variable.

[0050] In another embodiment provided by the present disclosure, the original signal includes: quadrature signals; The control module 1, such as Figure 7As shown in the figure, it includes: an orthogonal signal decoupling module 15, a signal processing module 12, a carrier-related signal generation module 14, and a modulation-related signal generation module 13; The orthogonal signal decoupling module 15 is configured to separate the phase and amplitude in the received orthogonal signal, and obtain an amplitude signal and a phase signal respectively; The signal processing module 12 includes a plurality of signal processing units, and is configured to determine a modulation mode according to modulation-related parameters represented by a control instruction, and call the signal processing units according to the call logic corresponding to the modulation mode, convert the phase signal into a phase delay signal, and obtain an amplitude modulation signal according to the amplitude signal; and output the phase delay signal to the carrier-related signal generation module 14, and output the amplitude modulation signal to the modulation-related signal generation module 13; The carrier-related signal generation module 14 is configured to perform phase modulation on the phase delay signal to obtain a carrier signal, and output the carrier signal to the radio frequency module; The modulation-related signal generation module 13 is configured to modulate the amplitude modulation signal with a preset reference level to obtain a modulation reference level, and output the modulation reference level to the modulation module.

[0051] In the embodiment of the present disclosure, the original signal may also be an orthogonal signal (I / Q, In-phase signal / Quadrature signal) sent by an external digital global broadcast (DRM, Digital Radio Mondiale) modulator.

[0052] The control module 1 for orthogonal signal processing may include an orthogonal signal decoupling module 15, and the orthogonal signal decoupling module 15 may separate the phase and amplitude of the orthogonal signal to obtain a phase signal and an amplitude signal respectively. And input the phase signal and the amplitude signal into the signal processing module 12 respectively. Assume the orthogonal signal where, is the in-phase component, corresponding to the cosine component of the orthogonal signal; is the quadrature component, corresponding to the sine component of the orthogonal signal. Then the amplitude signal of the orthogonal signal is ; the phase signal is .

[0053] The signal processing module 12 may convert the phase signal into a phase delay signal and convert the amplitude signal into an amplitude modulation signal.

[0054] The modulation-related signal generation module 13 may provide a predetermined reference level for the amplitude modulation signal to standardize the generated signal, so as to ensure that the signal matches the input dynamic range of the subsequent device during the modulation process, making the whole process controllable and distortion-free.

[0055] The carrier-related signal generation module 14 can convert the phase delay signal into a carrier signal according to the phase modulation method and output the carrier signal to the radio frequency module 2.

[0056] In another embodiment provided by the present disclosure, the modulation mode is a digital broadcast mode; as Figure 8 shown, the signal processing unit includes: a calculation unit 121 and a delay unit 124; the signal processing module 12 further includes: a storage module 122; The signal processing module 12 is configured to call the delay unit 124 to adjust the delay of the phase signal to obtain a phase delay signal; call the calculation module to call the modulation algorithm of the digital broadcast mode from the storage module 122; and generate an amplitude modulation signal according to the amplitude signal through the modulation algorithm of the digital broadcast mode.

[0057] In the embodiment of the present disclosure, after the control instruction input signal processing module 12, the signal processing module 12 modulates the amplitude signal and the phase signal according to the control instruction by calling the digital broadcast mode.

[0058] After the phase signal is input to the signal processing module 12, it is delayed by the delay unit 124, and the delay is adjusted to align the time difference between the phase signal and the amplitude signal. After obtaining the phase delay signal, the phase delay signal is input to the carrier-related signal generation module 14.

[0059] After the amplitude signal is input to the signal processing module 12, the calculation unit 121 uses the corresponding digital broadcast algorithm to calculate the amplitude signal to obtain an amplitude modulation signal, and outputs the amplitude modulation signal to the modulation-related signal generation module 13.

[0060] In another embodiment provided by the present disclosure, the modulation module 3, as Figure 9 shown, includes: a rectifier 31, a modulator 32, and a filter 33; The rectifier 31 is connected to the power supply for filtering the noise in the power supply and providing a DC level for the modulation module 3; The modulator 32 is configured to divide the DC level into multiple stepped levels and superimpose the stepped levels according to the modulation reference level to obtain a stepped reference signal; The filter 33 is configured to filter the stepped ripple in the stepped reference signal to obtain an amplitude modulation signal and output the amplitude modulation signal to the radio frequency module 2.

[0061] In the embodiments of the present disclosure, the modulation method adopted by the modulation module 3 may be an electronic device based on the PSM modulation method. The rectifier 31 is connected to an independent power supply, which is used to supply power to the modulation module 3 (provide a DC level), filter out the noise interference existing in the power supply, and maintain the stability of the circuit. The modulator 32 may be composed of multiple parallel high-speed switches, which can divide the input DC level into multiple stepped levels by turning on and off different switches. Here, the input DC level may be the same as the power of the carrier signal. By sampling the input signal (which may be the modulation reference level in the present disclosure) at a fixed frequency, quantifying it into discrete amplitude levels, and controlling the on and off of the high-speed switches according to the amplitude levels, a stepped reference signal is obtained. Among them, the waveform of the stepped reference signal may be as Figure 10 shown.

[0062] In the present disclosure, the filter 33 may be a low-pass filter, which can filter out the stepped ripple in the stepped reference signal, smooth the stepped reference signal to obtain an amplitude-modulated signal, and output the amplitude-modulated signal to the RF module 2.

[0063] In another embodiment provided by the present disclosure, the RF module 2, as Figure 11 shown, includes: a carrier signal processing link 21 and a signal output link 22; The carrier signal processing link 21 is used to generate a carrier signal according to the carrier-related parameters when the signal processing module sends the carrier-related parameters to the RF module 2, and after rectifying, filtering, and amplifying the carrier signal, output the carrier signal to the signal output link 22; The carrier signal processing link 21 is also used to rectify, filter, and amplify the carrier signal and then output the carrier signal to the signal output link 22 when the signal processing module outputs the carrier signal to the RF module 2; The signal output link 22 is used to modulate the amplitude of the carrier signal based on the amplitude-modulated signal to obtain a target signal, and output it to the antenna terminal of the signal transmitter.

[0064] In the embodiments of the present disclosure, the carrier signal processing link 21 may include components such as a radio frequency (RF) attenuator, a broadband amplifier, a high-preamplifier, a harmonic filter, a balun, and a directional coupler. Among them, the RF attenuator may be used as the input stage of the carrier signal processing link 21. The carrier signal processing link 21 can perform processing such as power attenuation, signal amplification, noise reduction, clutter filtering, and differential signal and single-ended signal conversion on the carrier signal, so that the carrier signal meets the requirements of the target transmission signal, and output the carrier signal to the signal output link 22.

[0065] The carrier signal processing link 21 may further include a frequency synthesizer, which is disposed at the input stage of the carrier signal processing link 21 and can generate a carrier signal according to carrier-related parameters.

[0066] The signal output link 22 may include a drive-stage input network, a radio-frequency drive stage, a final-stage input network, a final-stage output network, and a final-stage amplifier. The final-stage amplifier may be a type of radio-frequency electron tube. The amplitude-modulated signal and the carrier signal are subjected to high-voltage screen modulation at the anode of the electron tube. Since the power of the DC level used to modulate the stepped reference signal may be the same as the power of the carrier signal, in the full-amplitude modulation state, the electron tube voltage will vary within the range from zero to twice the voltage value of the carrier signal. In this way, both the carrier power and the modulation power can be provided.

[0067] The final-stage input network may be connected to the output stage of the carrier signal processing link 21; the final-stage output network may be connected to the antenna terminal of the signal transmitter.

[0068] The embodiments of the present disclosure further provide an electronic device, including: the signal transmitter provided in any one of the above embodiments.

[0069] Through the description of the above embodiments, those skilled in the art can clearly understand that the embodiments of the present disclosure can be implemented by hardware or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present disclosure.

[0070] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred embodiment, and the modules or processes in the drawings are not necessarily essential for implementing the present disclosure.

[0071] Those skilled in the art can understand that the modules in the device in the embodiments can be distributed in the device in the embodiments according to the description of the embodiments, or can be correspondingly changed and located in one or more devices different from the present embodiment. The modules of the above embodiments can be combined into one module, or further split into multiple sub-modules.

[0072] The serial numbers of the above embodiments of the present disclosure are only for description and do not represent the advantages and disadvantages of the embodiments.

[0073] Obviously, those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these modifications and variations.

Claims

1. A signal transmitter, characterized in that, Comprising: A control module, a radio frequency module, and a modulation module; The control module is configured to receive an original signal and a control instruction, generate a modulation-related signal according to modulation-related parameters represented by the original signal and the control instruction, and transmit the modulation-related signal to the modulation module; The modulation module is configured to generate an amplitude-modulated signal according to the modulation-related signal and send the amplitude-modulated signal to the radio frequency module; The radio frequency module is configured to modulate the amplitude of a carrier signal with the amplitude-modulated signal to obtain a target signal; the carrier signal is generated based on carrier-related parameters represented by the control instruction.

2. The transmitter according to claim 1, characterized in that, The original signal includes: a first audio signal; The control module includes: an audio processing module, a signal processing module, and a modulation-related signal generation module; The audio processing module is configured to perform digital conversion on the input first audio signal to obtain a second audio signal; The signal processing module includes a plurality of signal processing units, and is configured to determine a modulation mode according to modulation-related parameters represented by the control instruction, call the signal processing units according to the call logic corresponding to the modulation mode, convert the second audio signal into a third audio signal; and send the carrier-related parameters represented by the control instruction to a relevant module to generate a carrier signal; The modulation-related signal generation module is configured to modulate the third audio signal with a preset reference level to obtain a modulation reference level and output the modulation reference level to the modulation module.

3. The transmitter according to claim 2, characterized in that, The control module further includes: a carrier-related signal generation module; the relevant module is the carrier-related signal generation module; The carrier-related signal generation module is configured to generate a carrier signal according to carrier-related parameters and output the carrier signal to the radio frequency module.

4. The transmitter according to claim 2, characterized in that, The relevant module is the radio frequency module; The radio frequency module is further configured to generate a carrier signal according to the carrier-related parameters.

5. The transmitter according to claim 2, characterized in that The modulation mode is a double sideband mode; The signal processing unit includes: a calculation unit; the signal processing module further includes: a storage module; The signal processing module is configured to call the calculation unit, obtain a modulation algorithm for the double sideband mode from the storage module; generate a first carrier level through the modulation algorithm for the double sideband mode according to a preset carrier power; and add the first carrier level to the second audio signal to obtain a third audio signal.

6. The transmitter according to claim 2, wherein The modulation mode is a floating carrier mode; The signal processing unit includes: a calculation unit, a rectification unit, a delay unit, and a detection unit; the signal processing module further includes: a storage module; The signal processing module is configured to call the rectification unit to rectify the second audio signal and determine the amplitude of the second audio signal; call the detection unit to determine the peak data of the second audio signal according to the amplitude of the second audio signal; call the calculation unit to call the modulation algorithm of the floating carrier mode from the storage module; and generate a second carrier level through the modulation algorithm of the floating carrier mode according to the peak data of the second audio signal; add the second audio signal after the delay adjustment by the delay unit to the second carrier level to obtain a third audio signal.

7. The transmitter according to claim 2, characterized in that, When the modulation mode is the amplitude companding mode; The signal processing unit includes: a calculation unit, a rectification unit, a delay unit, a detection unit, and a filtering unit; the signal processing module further includes: a storage module; The signal processing module is configured to call the rectification unit to rectify the second audio signal and determine the amplitude of the second audio signal; call the detection unit to determine the peak data of the second audio signal according to the amplitude of the second audio signal; call the calculation unit to call the modulation algorithm of the amplitude companding mode from the storage module; and obtain a third carrier level through the modulation algorithm of the amplitude companding mode according to the peak data of the second audio signal; wherein, the third carrier level is inversely proportional to the peak data; multiply the second audio signal after being added with the DC level in the control instruction and adjusted for delay by the delay unit by the third carrier level signal after being filtered by the filtering unit to obtain a third audio signal.

8. The transmitter according to claim 1, characterized in that, The original signal includes: quadrature signals; The control module includes: a quadrature signal decoupling module, a signal processing module, a carrier-related signal generation module, and a modulation-related signal generation module; The quadrature signal decoupling module is configured to separate the phase and amplitude in the received quadrature signal to obtain an amplitude signal and a phase signal respectively; The signal processing module includes a plurality of signal processing units, and is configured to determine the modulation mode according to the modulation-related parameters represented by the control instruction, and call the signal processing units according to the call logic corresponding to the modulation mode, convert the phase signal into a phase delay signal, and obtain an amplitude modulation signal according to the amplitude signal; and output the phase delay signal to the carrier-related signal generation module, and output the amplitude modulation signal to the modulation-related signal generation module; The carrier-related signal generation module is configured to obtain the carrier signal after phase modulation of the phase delay signal and output the carrier signal to the radio frequency module; The modulation-related signal generation module is configured to modulate the amplitude modulation signal with a preset reference level to obtain a modulation reference level and output the modulation reference level to the modulation module.

9. The transmitter according to claim 8, wherein The modulation mode is the digital broadcast mode; The signal processing unit includes: a calculation unit and a delay unit; the signal processing module further includes: a storage module; The signal processing module is configured to call the delay unit to adjust the phase signal by a delay to obtain the phase-delayed signal; call the calculation module to call the modulation algorithm of the digital broadcast mode from the storage module; and generate the amplitude modulation signal according to the amplitude signal through the modulation algorithm of the digital broadcast mode.

10. The transmitter according to claim 1, characterized in that, The modulation module includes: a rectifier, a modulator, and a filter; The rectifier is connected to a power supply and is configured to filter out the noise in the power supply and provide a DC level for the modulation module; The modulator is configured to divide the DC level into a plurality of stepped levels and superimpose the stepped levels according to a modulation reference level to obtain a stepped reference signal; The filter is configured to filter out the stepped ripples in the stepped reference signal to obtain an amplitude-modulated signal and output the amplitude-modulated signal to the RF module.

11. The transmitter according to claim 4, characterized in that, The RF module includes: a carrier signal processing link and a signal output link; The carrier signal processing link is configured to, when the signal processing module sends carrier-related parameters to the RF module, generate a carrier signal according to the carrier-related parameters, rectify, filter, and amplify the carrier signal, and then output the carrier signal to the signal output link; The carrier signal processing link is further configured to, when the signal processing module outputs a carrier signal to the RF module, rectify, filter, and amplify the carrier signal and then output the carrier signal to the signal output link; The signal output link is configured to modulate the amplitude of the carrier signal based on the amplitude-modulated signal to obtain the target signal and output the target signal to the antenna terminal of the signal transmitter.

12. An electronic device, characterized in that, Comprising: The signal transmitter according to any one of claims 1-11.

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