Signal transmitter and electronic equipment

Abstract

The present disclosure provides a signal transmitter and electronic equipment, including: a control module, a radio frequency module and a modulation module; the control module is used 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 used to generate an amplitude modulation signal according to the modulation-related signal, and send the amplitude modulation signal to the radio frequency module; the radio frequency module is used to modulate the amplitude of a carrier signal using the amplitude modulation 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 the control instruction, select the appropriate modulation mode to adapt to the communication scenario in different communication environments, obtain higher modulation accuracy, and improve communication quality. The signal transmitter can flexibly change the modulation mode, which improves the integration, convenience and modulation accuracy of the transmitter.

Description

Technical Field

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

[0002] In the field of shortwave transmitters, modulation technology is a key component, directly impacting transmitter performance and signal transmission quality. Traditional shortwave transmitters rely on a single modulation scheme, making it difficult to meet diverse communication needs. The continuous advancement of communication technology has placed higher demands on the integration of shortwave transmitter functions. However, while some existing transmitters offer certain modulation capabilities, they generally only support a single modulation mode. Transmitters that support multiple modulation modes often suffer from limitations in modulation accuracy and ease of mode switching, making it impossible to effectively implement multiple, efficient modulation modes. This limits the application scope and performance of shortwave transmitters. Summary of the Invention

[0003] The 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, an embodiment of the present disclosure provides a signal transmitter, including: a control module, a radio frequency module and a modulation module;

[0005] 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;

[0006] 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;

[0007] The radio frequency module is used to modulate the amplitude of a carrier signal using the amplitude modulation signal to obtain a target signal; the carrier signal is generated based on carrier-related parameters represented by the control instruction.

[0008] In combination with the first aspect, in a possible implementation manner, the original signal includes: a first audio signal;

[0009] The control module includes: an audio processing module, a signal processing module and a modulation-related signal generation module;

[0010] The audio processing module is configured to digitally convert the input first audio signal to obtain a second audio signal;

[0011] The signal processing module includes a plurality of signal processing units, configured to determine a modulation mode according to the modulation-related parameters represented by the control instruction, and call the signal processing units according to the calling 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 a related module to generate a carrier signal;

[0012] The modulation-related signal generating 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.

[0013] In combination with the first aspect, in a possible implementation manner, the control module further includes: a carrier-related signal generation module; the related module is the carrier-related signal generation module;

[0014] The carrier-related signal generating module is configured to generate a carrier signal according to carrier-related parameters and output the carrier signal to the radio frequency module;

[0015] With reference to the first aspect, in one possible implementation, the related module is a radio frequency module;

[0016] The radio frequency module is further configured to generate a carrier signal according to the carrier-related parameters.

[0017] In combination 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;

[0018] The signal processing module is configured to call the calculation unit to obtain a double-sideband mode modulation algorithm from the storage module; generate a first carrier level using the double-sideband mode modulation algorithm according to a preset carrier power; and add the first carrier level to the second audio signal to obtain a third audio signal.

[0019] In combination with the first aspect, in a possible implementation, 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;

[0020] 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 peak data of the second audio signal based on the amplitude of the second audio signal; call the calculation unit to call the floating carrier mode modulation algorithm from the storage module; and generate a second carrier level based on the peak data of the second audio signal using the floating carrier mode modulation algorithm; and add the second audio signal after delay adjusted by the delay unit to the second carrier level to obtain a third audio signal.

[0021] In combination with the first aspect, in a possible implementation, the modulation mode is an amplitude compression and expansion 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;

[0022] 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 based on the amplitude of the second audio signal; call the calculation unit to call the modulation algorithm of the amplitude compression and expansion mode from the storage module; and obtain a third carrier level based on the peak data of the second audio signal using the modulation algorithm of the amplitude compression and expansion mode; wherein the third carrier level is inversely proportional to the peak data; and multiply the second audio signal, which is added to the DC level in the control instruction and delayed by the delay unit, by the third carrier level signal filtered by the filtering unit to obtain a third audio signal.

[0023] In combination with the first aspect, in a possible implementation manner, the original signal includes: an orthogonal signal;

[0024] 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;

[0025] The orthogonal signal decoupling module is used to separate the phase and amplitude of the received orthogonal signal to obtain an amplitude signal and a phase signal respectively;

[0026] The signal processing module includes a plurality of signal processing units, which are used to determine a modulation mode according to the modulation-related parameters represented by the control instruction, and call the signal processing units according to the calling 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;

[0027] The carrier-related signal generating module is configured to obtain the carrier signal by phase-modulating the phase-delayed signal, and output the carrier signal to the RF module;

[0028] The modulation-related signal generating 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.

[0029] 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;

[0030] The signal processing module is used to call the delay unit to adjust and delay the phase signal to obtain the phase delay 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.

[0031] In combination with the first aspect, in a possible implementation manner, the modulation module includes: a rectifier, a modulator, and a filter;

[0032] The rectifier is connected to the power supply, and is used to filter out noise in the power supply and provide a DC level for the modulation module;

[0033] The modulator is used to divide the DC level into a plurality of step levels, and superimpose the step levels according to a modulation reference level to obtain a step reference signal;

[0034] The filter is used to filter out the step ripple in the step reference signal to obtain an amplitude modulated signal, and output the amplitude modulated signal to the radio frequency module.

[0035] In combination with the first aspect, in a possible implementation, the radio frequency module includes: a carrier signal processing link and a signal output link;

[0036] 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 output the carrier signal to the signal output link after rectifying, filtering and amplifying the carrier signal;

[0037] The carrier signal processing link is further configured to, when the signal processing module outputs the carrier signal to the radio frequency module, rectify, filter and amplify the carrier signal and then output the carrier signal to the signal output link;

[0038] The signal output link is used to modulate the amplitude of the carrier signal based on the amplitude modulation signal to obtain the target signal and output it to the antenna end of the signal transmitter.

[0039] In a second aspect, an embodiment of the present disclosure provides an electronic device, including: the signal transmitter described in the first aspect or in combination with any possible implementation of the first aspect.

[0040] The beneficial effects of the embodiments of the present disclosure include:

[0041] The embodiment of the present disclosure provides a signal transmitter and electronic device, including: a control module, a radio frequency module and a modulation module; the control module is used 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 used 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 used to modulate the amplitude of a carrier signal using 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 control instructions, thereby selecting an appropriate 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 shortwave transmitter with a single modulation mode in the related art, the signal transmitter can flexibly change the modulation mode, thereby improving the integration, convenience and modulation accuracy of the transmitter. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the structure of a signal transmitter provided in an embodiment of the present disclosure;

[0043] Figure 2 A schematic diagram of a control module structure provided in an embodiment of the present disclosure;

[0044] Figure 3 A schematic diagram of another control module structure provided in an embodiment of the present disclosure;

[0045] Figure 4 A logic diagram of calling the double-sideband modulation mode provided in an embodiment of the present disclosure;

[0046] Figure 5 A logic diagram of calling the floating carrier modulation mode provided in an embodiment of the present disclosure;

[0047] Figure 6 A logic diagram of the amplitude companding modulation mode call provided in an embodiment of the present disclosure;

[0048] Figure 7A schematic diagram of another control module structure provided in an embodiment of the present disclosure;

[0049] Figure 8 A logic diagram of a digital broadcast modulation mode call provided by an embodiment of the present disclosure;

[0050] Figure 9 A schematic diagram of the modulation module structure provided in an embodiment of the present disclosure;

[0051] Figure 10 A schematic diagram of a stepped reference signal waveform provided in an embodiment of the present disclosure;

[0052] Figure 11 A schematic diagram of the radio frequency module structure provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0053] The present disclosure provides a signal transmitter and electronic device. Preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are intended only to illustrate and explain the present disclosure and are not intended to limit the present disclosure. Furthermore, the embodiments and features of the embodiments in this application may be combined with each other unless there is a conflict.

[0054] The present disclosure provides a signal transmitter, such as Figure 1 As shown, it includes: a control module 1, a radio frequency module 2 and a modulation module 3;

[0055] Control module 1, used to receive the original signal and the control instruction, generate the 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;

[0056] Modulation module 3, used to generate an amplitude modulated signal according to the modulation-related signal and send the amplitude modulated signal to the radio frequency module 2;

[0057] The RF module 2 is used to modulate the amplitude of the carrier signal using an amplitude modulation signal to obtain a target signal; the carrier signal is generated based on carrier-related parameters represented by the control instruction.

[0058] In the embodiment of the present disclosure, the signal transmitter may be a shortwave transmitter, and the frequency range of the target signal outputted by the signal transmitter may be in the range of It can be applied to fields such as international broadcasting and long-distance communication.

[0059] The control module 1 can be an electronic device composed of a field-programmable gate array (FPGA) chip, 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, and has functions such as analog-to-digital / digital-to-analog conversion, signal sampling, data storage, data calculation, communication, and signal generation.

[0060] The control module 1 can pre-store modulation-related parameters corresponding to a variety of modulation modes, each corresponding to a different control instruction. Based on the received control instruction, the control module 1 can call on different modulation-related parameters 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 a command signal transmitted from the signal transmitter's host computer to change the signal transmitter's modulation module 3; it can also be a command signal transmitted to the control module 1 by other modules within the signal transmitter.

[0061] The modulation module 3 may be a pulse step modulation (PSM) device, which amplitude modulates the modulation-related signal by a pulse step modulation method and provides carrier power and modulation power for the signal to obtain an amplitude modulated signal.

[0062] RF module 2 modulates the amplitude of a carrier signal according to the amplitude modulation signal to generate the target signal for transmission. The carrier signal in RF module 2 can be generated based on the corresponding carrier signal parameters (including the frequency, amplitude, and phase) provided by control module 1. Alternatively, control module 1 can directly generate the corresponding carrier signal and output it to RF module 2.

[0063] The signal transmitter provided by this disclosure can change the modulation mode through control commands, thereby selecting the appropriate modulation mode to adapt to the current communication scenario in different communication environments, achieving higher modulation accuracy and improving communication quality. Compared with traditional shortwave transmitters with a single modulation method in related technologies, this signal transmitter can flexibly change the modulation mode, improving the transmitter's integration, convenience, and modulation accuracy.

[0064] In another embodiment provided by the present disclosure, the original signal includes: a first audio signal;

[0065] Control module 1, such as Figure 2 As shown, it includes: an audio processing module 11, a signal processing module 12 and a modulation-related signal generating module 13;

[0066] The audio processing module 11 is used to digitally convert the input first audio signal to obtain a second audio signal;

[0067] The signal processing module 12 includes a plurality of signal processing units, configured to determine a modulation mode according to the 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 the relevant modules to generate a carrier signal;

[0068] The modulation-related signal generating module 13 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 .

[0069] In the disclosed embodiments, the first audio signal can be an electrical signal (i.e., an analog audio signal) converted from an acoustic signal captured by a microphone or sensor, or a digital audio signal. The audio processing module 11 can sample and quantize the analog audio signal according to a preset sampling rate and quantization bit depth, and after preprocessing (e.g., digital filtering and gain control), obtain a second audio signal. The second audio signal can be a baseband AC signal without a DC component. If the first audio signal is a digital audio signal, preprocessing can be performed directly on the first audio signal to obtain the second audio signal.

[0070] The signal processing module 12 includes multiple signal processing units, each of which can perform different signal processing tasks, such as processing signals using a modulation algorithm, adjusting the signal's phase, rectifying the signal, and detecting the signal waveform. Based on received control instructions, the signal processing module 12 can select different modulation modes, each corresponding to different call logic. Based on the call logic, the signal processing module 12 calls the corresponding signal processing unit to participate in the corresponding signal processing flow. For signal processing units that require modulation algorithm calculations, the module calls the modulation algorithm corresponding to the modulation mode to convert the second audio signal into a third audio signal.

[0071] Different modulation modes can correspond to different carrier signals. The carrier signal parameters corresponding to each modulation mode can be carried by the control instructions input to the signal processing module 12, or pre-stored carrier signal parameters can be retrieved according to the control instructions. The signal processing module 12 can generate corresponding carrier-related parameters based on different modulation modes and send them to the relevant module for generating the carrier signal, which then generates the corresponding carrier signal. The carrier-related parameters can include information that characterizes the signal, such as the carrier frequency, amplitude, and phase.

[0072] The modulation-related signal generation module 13 can be used to set and control the reference voltage or current during the modulation process, which can 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, providing a predetermined reference level for the third audio signal. This standardizes the generated signal and ensures that the signal matches the input dynamic range of subsequent devices during the modulation process, making the entire process controllable and distortion-free.

[0073] In another embodiment provided by the present disclosure, Figure 2 As shown, the control module 1 further includes: a carrier-related signal generating module 14; the related module is the carrier-related signal generating module 14;

[0074] The carrier-related signal generating module 14 is used to generate a carrier signal according to the carrier-related parameters and output the carrier signal to the RF module 2;

[0075] In the disclosed embodiment, the carrier-related signal generation module 14 may be a circuit composed of components including a frequency synthesizer, which can generate a corresponding carrier signal based on carrier-related parameters. The frequency synthesizer can generate the corresponding signal using direct digital synthesis (DDS). DDS is a method for generating signals through signal processing technology. Its core concept is to use digital circuits to generate a phase sequence, then map the phase to a corresponding amplitude value, and ultimately generate a corresponding signal waveform based on this phase sequence to obtain the target carrier signal.

[0076] In another embodiment provided by the present disclosure, Figure 3 As shown, the relevant module is the radio frequency module 2;

[0077] The radio frequency module 2 is further configured to generate a carrier signal according to carrier-related parameters.

[0078] In the disclosed embodiment, the RF module 2 may include a frequency synthesizer for generating a carrier signal based on carrier-related parameters. The frequency synthesizer may be provided at the input stage of a carrier signal processing chain within the RF module. The frequency synthesizer generates a corresponding carrier signal based on the carrier-related parameters using a DDS method, and inputs the signal into a subsequent carrier signal processing chain for signal processing.

[0079] The signal processing module 12 can generate carrier-related parameters according to the received control instruction and send the carrier-related parameters directly to the radio frequency module 2. The radio frequency module 2 can directly generate a carrier signal according to the received carrier-related parameters.

[0080] In another embodiment provided by the present disclosure, the modulation mode is a double-sideband mode; Figure 4 As shown, the signal processing unit includes: a calculation unit 121; the signal processing module 12 also includes: a storage module 122;

[0081] The signal processing module 12 is configured to call the calculation unit 121 to obtain a double-sideband mode modulation algorithm from the storage module 122; generate a first carrier level using the double-sideband mode modulation algorithm according to a preset carrier power; and add the first carrier level to the second audio signal to obtain a third audio signal.

[0082] In the disclosed embodiments, double-sideband (DSB) mode is an amplitude modulation technique that modulates the carrier amplitude with a baseband signal to generate signals carrying upper and lower sidebands. DSB mode is suitable for communication scenarios requiring high-power transmission but with low signal bandwidth requirements.

[0083] When the signal transmitter needs to communicate, the operator or the host computer can issue a control instruction and the audio signal to be sent (i.e., the first audio signal). 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 may include parameters such as the configuration carrier frequency and the 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 the DC component superimposed on the signal during the modulation process. The third audio signal can be obtained by adding the obtained first carrier level and the second audio signal. The expression of the third audio signal can be: .in is the second audio signal, is the third audio signal, The obtained third audio signal is sent to the modulation-related signal generating module 13.

[0084] The signal processing module 12 can also generate the required carrier signal parameters according to the control instructions, and send the corresponding carrier signal parameters to the carrier-related signal generation module 14 or directly transmit them to the radio frequency module 2, which generates the carrier signal. The carrier signal generated for the double-sideband mode can be This carrier signal is processed by the subsequent link of the RF module 2 and is used to match the target band (the transmitter provided by the present disclosure can be ) to match the RF excitation signal.

[0085] In another embodiment provided by the present disclosure, the modulation mode is a floating carrier mode; Figure 5 As 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 also includes: a storage module 122;

[0086] 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 value of the second audio signal based on the amplitude of the second audio signal; call the calculation unit 121 to retrieve the floating carrier mode modulation algorithm from the storage module 122; and generate a second carrier level based on the peak value of the second audio signal using the floating carrier mode modulation algorithm; and add the second audio signal, after delaying by the delay unit 124, to the second carrier level to obtain a third audio signal.

[0087] In the disclosed embodiments, the floating carrier (DCC) mode is a modulation method that controls the carrier level. This modulation method adjusts the carrier signal power based on the strength of the audio signal, significantly reducing the carrier power when there is no audio signal activity. The main advantages of the floating carrier mode are power and cost savings, and its applicability to complex communication environments.

[0088] After the control instruction is input into the signal processing module 12, the signal processing module 12 calls the floating carrier mode according to the control instruction to modulate the second audio signal. After the second audio signal is input into the signal processing module 12, it is divided into two paths, one of which is first input into 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. Rectification can be achieved by taking the absolute value of each sample value. Assume that the original digital audio signal is , the rectified signal It can be expressed as ,in The rectified signal can be used to determine the amplitude of the signal by using the mean value method or the root mean square value method, and the detected amplitude is sent to the calculation unit 121.

[0089] Furthermore, the detection unit 125 can detect the peak value of the second audio signal and send the detected signal peak value to the calculation unit 121. The calculation unit 121 can determine the peak-to-average ratio of the second audio signal based on the amplitude and peak value, and determine the characteristics of the second audio signal based on the peak-to-average ratio, thereby dynamically generating a corresponding second carrier level, so that the subsequently generated signal matches the dynamic range of the device, avoiding excessive compression or clipping of the audio signal, and ensuring that the signal does not exceed the quantization range of the device.

[0090] The second audio signal on the other hand enters the delay unit 124. Since there is a delay between the second audio signal and the second carrier level due to the signal transmission path, the time difference between the two is made up by the delay unit 124 to ensure that the two remain synchronized when added, maintain phase consistency, and avoid waveform distortion caused by phase inconsistency.

[0091] Finally, the second audio signal obtained after adjusting the delay is added to the second carrier signal to obtain a third audio signal, and the third audio signal is output to .Here, the third audio signal can be an amplitude-compressed audio signal.

[0092] Similarly, the signal processing module 12 can also generate carrier signal parameters including amplitude, frequency, phase and other information for the floating carrier mode according to the control instruction, and the carrier-related signal generation module 14 or the radio frequency module 2 generates the carrier signal. The carrier signal for the floating carrier mode can be ,in, Representative Moment 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.

[0093] In another embodiment provided by the present disclosure, when the modulation mode is the amplitude compression and expansion mode; Figure 6 As 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 also includes: a storage module 122;

[0094] 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 based on the amplitude of the second audio signal; call the calculation unit 121 to call the modulation algorithm of the amplitude compression and expansion mode from the storage module 122; and obtain a third carrier level based on the peak data of the second audio signal through the modulation algorithm of the amplitude compression and expansion mode; wherein the third carrier level is inversely proportional to the peak data; and multiply the second audio signal, which is added to the DC level in the control instruction and delayed by the delay unit, by the third carrier level signal filtered by the filtering unit 126 to obtain the third audio signal.

[0095] In the disclosed embodiments, Amplitude Companding (AMC) is an amplitude modulation technique that combines compression and expansion. It aims to optimize the signal's dynamic range and improve transmission quality. It can be applied to communications scenarios with high signal-to-noise ratio requirements. For the transmitter, the transmitted signal must first be nonlinearly compressed (small signals amplified and large signals reduced) before amplitude modulation is applied.

[0096] After the control instruction is input into the signal processing module 12, the signal processing module 12 calls the amplitude compression and expansion mode according to the control instruction to modulate the second audio signal. After the second audio signal is input into the signal processing module 12, it is divided into two paths, one of which is rectified, the amplitude is determined, and the peak value is determined by the rectification unit 123 and the detection unit 125. Then, the calculation unit 121 selects the corresponding carrier level value in the preset compression and expansion 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 small signal anti-noise performance; for large signals, a low level can be output to avoid overmodulation and reduce the peak-to-average power ratio. The compression and expansion curve can be similar to or The generated third carrier level is input to the filter unit 126, which may be a low-pass filter that can smooth the sudden change in the third carrier level to prevent the introduction of modulation distortion.

[0097] The second audio signal is first added to the DC level in the control command. This addition prevents the audio signal's amplitude from crossing zero or being too negative, prevents linear distortion, and optimizes the audio signal's dynamic range. The signal is then input to delay unit 124, where it undergoes delay adjustment before being multiplied by the filtered third audio signal to generate a third audio signal.

[0098] Similarly, the signal processing module 12 can also generate carrier signal parameters including amplitude, frequency, phase and other information for the compression and expansion mode according to the control instruction, and the carrier-related signal generation module 14 or the radio frequency module 2 generates the carrier signal. The carrier signal for the compression and expansion mode can be generated as follows: ,in, is the signal amplitude; is the signal frequency; is the time variable.

[0099] In another embodiment provided by the present disclosure, the original signal includes: an orthogonal signal;

[0100] Control module 1, such as Figure 7 As shown, it includes: an orthogonal signal decoupling module 15, a signal processing module 12, a carrier-related signal generating module 14 and a modulation-related signal generating module 13;

[0101] The orthogonal signal decoupling module 15 is used to separate the phase and amplitude of the received orthogonal signal to obtain an amplitude signal and a phase signal respectively;

[0102] The signal processing module 12 includes multiple 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 calling 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;

[0103] The carrier-related signal generating module 14 is used to obtain a carrier signal after phase modulation of the phase-delayed signal, and output the carrier signal to the radio frequency module;

[0104] The modulation-related signal generating 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.

[0105] In the embodiment of the present disclosure, the original signal may also be an I / Q (In-phase signal / Quadrature signal) signal sent by an external Digital Radio Mondiale (DRM) modulator.

[0106] The control module 1 for orthogonal signal processing may include an orthogonal signal decoupling module 15, which can separate the phase and amplitude of the orthogonal signal to obtain a phase signal and an amplitude signal respectively. The phase signal and the amplitude signal are input to the signal processing module 12 respectively. Assuming that the orthogonal signal ,in, is the in-phase component, corresponding to the cosine component of the orthogonal signal; is the orthogonal component, corresponding to the sinusoidal component of the orthogonal signal. Then the amplitude signal of the orthogonal signal is ; The phase signal is .

[0107] The signal processing module 12 may convert the phase signal into a phase-delayed signal and the amplitude signal into an amplitude-modulated signal.

[0108] The modulation-related signal generation module 13 can provide a predetermined reference level for the amplitude modulation signal to standardize the generated signal to ensure that the signal matches the input dynamic range of subsequent devices during the modulation process, making the entire process controllable and distortion-free.

[0109] The carrier-related signal generating module 14 can convert the phase-delayed signal into a carrier signal according to a phase modulation method, and output the carrier signal to the RF module 2 .

[0110] In another embodiment provided by the present disclosure, the modulation mode is a digital broadcast mode; Figure 8 As shown, the signal processing unit includes: a calculation unit 121 and a delay unit 124; the signal processing module 12 also includes: a storage module 122;

[0111] The signal processing module 12 is used 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.

[0112] In the embodiment of the present disclosure, after the control instruction is input into the signal processing module 12 , the signal processing module 12 calls the digital broadcast mode to modulate the amplitude signal and the phase signal according to the control instruction.

[0113] After the phase signal is input into the signal processing module 12 , the delay unit 124 performs delay processing, adjusts the delay, aligns the time difference of the phase signal relative to the amplitude signal, obtains the phase delay signal, and then inputs the phase delay signal into the carrier-related signal generation module 14 .

[0114] After the amplitude signal is input into the signal processing module 12 , the calculation unit 121 uses the corresponding digital broadcasting 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 .

[0115] In another embodiment provided by the present disclosure, the modulation module 3, such as Figure 9 As shown, it includes: a rectifier 31, a modulator 32 and a filter 33;

[0116] The rectifier 31 is connected to the power supply and is used to filter out noise in the power supply and provide a DC level for the modulation module 3;

[0117] The modulator 32 is used to divide the DC level into multiple step levels and superimpose the step levels according to the modulation reference level to obtain a step reference signal;

[0118] The filter 33 is used to filter out the step ripple in the step reference signal to obtain an amplitude modulated signal, and output the amplitude modulated signal to the RF module 2 .

[0119] In the embodiment 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, and is used to power the modulation module 3 (provide a DC level), and filter out the noise interference in the power supply to maintain the stability of the circuit. The modulator 32 may be composed of a plurality of high-speed switches in parallel, which can divide the input DC level into a plurality of step levels by turning on and off different switches. Here, the input DC level may be the same as the power of the carrier signal. The input signal (which may be a modulation reference level in the present disclosure) is sampled at a fixed frequency, quantized into discrete amplitude levels, and the on and off of the high-speed switch is controlled according to the amplitude level, thereby obtaining a step reference signal. The waveform of the step reference signal may be as follows: Figure 10 shown.

[0120] In the present disclosure, the filter 33 may be a low-pass filter, which may filter out the step ripples in the step reference signal, smooth the step reference signal to obtain an amplitude modulated signal, and output the amplitude modulated signal to the RF module 2 .

[0121] In another embodiment provided by the present disclosure, the radio frequency module 2, such as Figure 11 As shown, it includes: a carrier signal processing link 21 and a signal output link 22;

[0122] 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 output the carrier signal to the signal output link 22 after rectifying, filtering and amplifying the carrier signal;

[0123] The carrier signal processing link 21 is further 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;

[0124] The signal output link 22 is used to modulate the amplitude of the carrier signal based on the amplitude modulation signal to obtain the target signal and output it to the antenna end of the signal transmitter.

[0125] In the disclosed embodiment, the carrier signal processing chain 21 may include components such as a radio frequency (RF) attenuator, a broadband amplifier, a high-frequency preamplifier, a harmonic filter, a balun, and a directional coupler. The RF attenuator may serve as the input stage of the carrier signal processing chain 21. The carrier signal processing chain 21 may perform power attenuation, signal amplification, noise reduction, clutter filtering, and differential to single-ended signal conversion on the carrier signal, ensuring that the carrier signal meets the target transmission signal requirements. The carrier signal is then output to the signal output chain 22.

[0126] The carrier signal processing chain 21 may further include a frequency synthesizer, which is provided at the input stage of the carrier signal processing chain 21 and can generate a carrier signal according to carrier-related parameters.

[0127] The signal output chain 22 may include a driver input network, an RF driver, a final input network, a final output network, and a final amplifier. The final amplifier may be a RF electron tube. The amplitude modulation signal and the carrier signal are high-voltage screen-modulated at the electron tube's screen. Since the DC level used to modulate the step reference signal can have the same power as the carrier signal, the electron tube voltage will vary between zero and twice the carrier signal voltage in the full amplitude modulation state, thus providing both carrier power and modulation power.

[0128] The final stage input network can be connected to the output stage of the carrier signal processing chain 21; the final stage output network can be connected to the antenna end of the signal transmitter.

[0129] An embodiment of the present disclosure further provides an electronic device, comprising: the signal transmitter provided by any one of the above embodiments.

[0130] Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments of the present disclosure can be implemented through hardware or through software plus the necessary general-purpose hardware platform. Based on this 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 (such as a CD-ROM, USB flash drive, or mobile hard drive) and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in the various embodiments of the present disclosure.

[0131] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes in the accompanying drawings are not necessarily required for implementing the present disclosure.

[0132] Those skilled in the art will appreciate that the modules in the devices of the embodiments may be distributed in the devices of the embodiments as described in the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module or further split into multiple submodules.

[0133] The serial numbers of the above-mentioned embodiments of the present disclosure are for description only and do not represent the advantages or disadvantages of the embodiments.

[0134] Obviously, those skilled in the art may make various changes and modifications 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 equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A signal transmitter, characterized in that: include: Control module, radio frequency module and modulation module; The control module includes: a signal processing module; the signal processing module includes a plurality of signal processing units; The control module is configured to receive an original signal and a control instruction, enter a corresponding modulation mode based on the modulation-related parameters represented by the original signal and the control instruction, invoke a signal processing unit to generate a modulation-related signal, and transmit the modulation-related signal to the modulation module; wherein the modulation modes include: double-sideband mode, amplitude companding mode, floating carrier mode, and digital broadcast mode; 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 used to modulate the amplitude of a carrier signal using the amplitude modulation 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, wherein The original signal includes: a first audio signal; The control module further includes: an audio processing module and a modulation-related signal generation module; The audio processing module is configured to digitally convert the input first audio signal to obtain a second audio signal; The signal processing module is configured to determine a modulation mode according to the modulation-related parameters represented by the control instruction, and call the signal processing unit according to the calling 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 a related module to generate a carrier signal; The modulation-related signal generating 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, wherein The control module further includes: a carrier-related signal generation module; the related 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.

4. The transmitter according to claim 2, wherein The relevant module is a 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, wherein The modulation mode is a double-sideband mode; The signal processing unit includes: a calculation unit; the signal processing module also includes: a storage module; The signal processing module is configured to call the calculation unit to obtain a double-sideband mode modulation algorithm from the storage module; generate a first carrier level using the double-sideband mode modulation algorithm 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 also 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 peak data of the second audio signal based on the amplitude of the second audio signal; call the calculation unit to call the floating carrier mode modulation algorithm from the storage module; and generate a second carrier level based on the peak data of the second audio signal using the floating carrier mode modulation algorithm; and add the second audio signal after delay adjusted by the delay unit to the second carrier level to obtain a third audio signal.

7. The transmitter according to claim 2, wherein The modulation mode is an amplitude compression and expansion 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 also 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 based on the amplitude of the second audio signal; call the calculation unit to call the modulation algorithm of the amplitude compression and expansion mode from the storage module; and obtain a third carrier level based on the peak data of the second audio signal using the modulation algorithm of the amplitude compression and expansion mode; wherein the third carrier level is inversely proportional to the peak data; and multiply the second audio signal, which is added to the DC level in the control instruction and delayed by the delay unit, by the third carrier level signal filtered by the filtering unit to obtain a third audio signal.

8. The transmitter according to claim 1, wherein 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 used to separate the phase and amplitude of 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, which are used to determine a modulation mode according to the modulation-related parameters represented by the control instruction, and call the signal processing units according to the calling 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 generating module is configured to obtain the carrier signal by phase-modulating the phase-delayed signal, and output the carrier signal to the RF module; The modulation-related signal generating 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, characterized in that The modulation mode is a digital broadcast mode; The signal processing unit includes: a calculation unit and a delay unit; the signal processing module also includes: a storage module; The signal processing module is used to call the delay unit to adjust and delay the phase signal to obtain the phase delay 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, wherein The modulation module includes: a rectifier, a modulator and a filter; The rectifier is connected to the power supply, and is used to filter out noise in the power supply and provide a DC level for the modulation module; The modulator is used to divide the DC level into a plurality of step levels, and superimpose the step levels according to a modulation reference level to obtain a step reference signal; The filter is used to filter out the step ripple in the step reference signal to obtain an amplitude modulated signal, and output the amplitude modulated signal to the radio frequency module.

11. The transmitter according to claim 4, wherein 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 output the carrier signal to the signal output link after rectifying, filtering and amplifying the carrier signal; The carrier signal processing link is further configured to, when the signal processing module outputs the carrier signal to the radio frequency module, rectify, filter and amplify the carrier signal and then output the carrier signal to the signal output link; The signal output link is used to modulate the amplitude of the carrier signal based on the amplitude modulation signal to obtain the target signal and output it to the antenna end of the signal transmitter.

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

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