CN116436490A - Single-channel half-duplex soft non-equipment rapid receiving and transmitting method, medium, equipment and system - Google Patents
Single-channel half-duplex soft non-equipment rapid receiving and transmitting method, medium, equipment and system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application relates to a single-channel half-duplex soft non-equipment rapid transceiving method, medium, equipment and system, which optimize a software radio equipment driving layer, a radio frequency software layer and an application software layer, separate relevant working parameters for changing a receiving/transmitting mode from a link for opening/closing the transceiving equipment by initializing the working parameters and running a receiving/transmitting flow diagram program, realize the non-transceiving division of the opening/closing equipment, greatly reduce the time delay of the single-channel half-duplex soft non-equipment in the communication process, improve the signal transmission efficiency, avoid the crosstalk between two equipment antennas and greatly save the cost.
Description
Technical Field
The application relates to the field of software radio equipment communication, in particular to a single-channel half-duplex soft non-equipment rapid receiving and transmitting method, medium, equipment and system.
Background
Along with the development of the communication technology of the software radio equipment, single-channel half-duplex software radio equipment appears, and the single-channel half-duplex software radio equipment has the advantages of low price, perfect functions, high cost performance and the like, is very suitable for educational scientific research institutions, and can be used for realizing digital voice communication by taking single-channel half-duplex soft non-equipment and an antenna as soft non-radio frequency platforms at present.
However, the single-channel half-duplex software radio device only has a single channel and can only work in a half-duplex mode, and the relevant working parameters of the receiving and transmitting processes of the device are different, such as center frequency, gain and the like, so that to realize the switching between the receiving mode and the transmitting mode, the device needs to be restarted to reset the parameters, so that when the single-channel half-duplex soft radio platform performs the receiving and transmitting switching, the switching delay of more than 2 seconds exists, and sometimes the switching is performed again due to one switching failure, so that the delay reaches more than 6 seconds, which results in poor real-time voice communication effect and easy damage to the device in the actual communication process of the single-channel half-duplex soft radio platform. The use of two single channel half duplex software radio devices, one for transmitting and the other for receiving, can solve the delay problem of the handover, but the two devices are prone to mutual interference, making the communication effect unstable and increasing the cost.
Disclosure of Invention
Based on the above, it is necessary to provide a method, medium, device and system for fast receiving and transmitting of single-channel half-duplex soft non-equipment, so as to optimize the receiving and transmitting conversion problem of the single-channel half-duplex soft non-radio frequency platform.
In order to achieve the above object, the embodiment of the present invention adopts the following technical scheme:
in one aspect, the embodiment of the invention provides a single-channel half-duplex soft non-equipment rapid receiving and transmitting method, which comprises the following steps:
starting a single-channel half-duplex soft non-equipment;
initializing a receiving mode working parameter;
starting a data receiving mode and running a receiving flow chart program; the receiving flow graph program is used for receiving and playing external analog audio signals;
stopping the data reception mode;
initializing a transmission mode working parameter;
starting a data transmission mode, and running a transmission flow chart program; the transmission flow graph program is used for transmitting the local analog audio signal;
stopping the data transmission mode;
repeating the step of initializing the working parameters of the receiving mode to stop the data sending mode, and executing the voice communication task of the single-channel half-duplex soft non-equipment;
and after the voice communication task is finished, closing the single-channel half-duplex soft non-equipment.
In one embodiment, a process for running a receive flowsheet program includes:
receiving an external analog audio signal, and converting the external analog audio signal into an external digital audio signal;
filtering the extraneous digital audio signal;
resampling the filtered digital signal to obtain a low sampling rate audio signal;
taking the modulus value of the low sampling rate audio signal to obtain a real number audio signal;
removing the direct current component of the real audio signal to obtain a direct current-removed real audio signal;
removing the high-frequency component of the DC real number audio signal to obtain a restored external analog audio signal, and playing the restored external analog audio signal.
In one embodiment, the process of removing the dc component of the real audio signal to obtain a dc-free real audio signal includes:
the real audio signal subtracts the self average value to obtain the DC-free real audio signal.
In one embodiment, a process for running a send flow graph program includes:
inputting a local analog audio signal, and converting the local analog audio signal into a local digital audio signal;
removing high-frequency components of the local digital audio signal to obtain a low-pass real audio signal;
converting the low-pass real audio signal into a low-pass complex audio signal;
resampling the low-pass complex audio signal to obtain a high-sampling-rate audio signal;
modulating the high sampling rate audio signal and transmitting the modulated high sampling rate audio signal to the antenna.
In one embodiment, the process of resampling the low-pass complex audio signal to obtain a high-sampling-rate audio signal includes:
and performing two-stage resampling on the low-pass complex audio signal through an embedded constant coefficient multiplier to obtain a high-sampling-rate audio signal.
In one embodiment, the operating parameters of the receive mode and the transmit mode include: center frequency, sample rate, bandwidth, gain value, and offset value.
In one embodiment, the initialization is performed by calling an initialization function during the process of initializing the receive mode operating parameter and initializing the transmit mode operating parameter.
In one aspect, an embodiment of the present invention provides a readable storage medium, where a driver is stored, where the driver, when executed by a processor, implements the steps of any one of the foregoing single-channel half-duplex soft non-device fast transceiving methods.
In one aspect, the embodiment of the invention provides a single-channel half-duplex soft non-equipment, which comprises a switch component, an initialization component, a mode switching component, a receiving flow chart program operation component and a sending flow chart program operation component;
the switch assembly is used for starting and closing the single-channel half-duplex soft non-equipment;
the initialization component is used for initializing the working parameters of the receiving mode and the working parameters of the transmitting mode, and the working parameters of the receiving mode and the transmitting mode comprise: center frequency, sampling rate, bandwidth, gain value, and offset value;
a mode switching component for starting and stopping a data receiving mode and a data transmitting mode;
a receive flowsheet program execution component for executing a receive flowsheet program; the receiving flow graph program is used for receiving and playing external analog audio signals;
a send flow graph program running component for executing the send flow graph program; the transmit flow graph program is used to transmit the local analog audio signal.
In one embodiment, a receive flowsheet program execution component comprises: the system comprises an open source mobile communication protocol information source module, an FIR filter, a reasonable resampling module, a complex modulus function module, an isolated direct current module, a low-pass filtering module and an audio information sink module;
the open source mobile communication protocol information source module is used for receiving external analog audio signals and converting the external analog audio signals into external digital audio signals;
an FIR filter for filtering the extraneous digital audio signal;
the reasonable resampling module is used for resampling the filtered digital signal to obtain a low sampling rate audio signal;
the complex modulus function module is used for modulus value of the low sampling rate audio signal to obtain a real number audio signal;
the isolation direct current module is used for removing direct current components of the real audio signal by subtracting the self average value to obtain a DC-removed real audio signal;
the low-pass filtering module is used for removing high-frequency components of the direct-current real number audio signals to obtain restored external analog audio signals;
and the audio signal sink module is used for playing the restored external analog audio signals.
In one embodiment, the send flow graph program run component comprises: the system comprises an audio signal source module, a low-pass filter, a real signal to complex signal conversion module, a reasonable resampling module and an open source mobile communication protocol information sink module;
the audio signal source module is used for inputting local analog audio signals and converting the local analog audio signals into local digital audio signals;
the low-pass filter is used for removing high-frequency components of the local digital audio signal to obtain a low-pass real audio signal;
the real signal-to-complex signal module is used for converting the low-pass real audio signal into a low-pass complex audio signal;
the reasonable resampling module is used for carrying out two-stage resampling on the low-pass complex audio signal through an embedded constant coefficient multiplier to obtain a high-sampling-rate audio signal;
and the open source mobile communication protocol information sink module is used for modulating the high sampling rate audio signal and transmitting the modulated high sampling rate audio signal to the antenna.
On the other hand, the embodiment of the invention provides a radio frequency platform test system based on the single-channel half-duplex soft non-equipment in any embodiment, which comprises the following components: the system comprises an interference console, a software radio interference environment construction platform, an analog operation console receiving end, an analog operation console transmitting end and any single-channel half-duplex soft non-equipment;
the single-channel half-duplex soft wireless device comprises a software radio frequency platform receiving end and a software radio frequency platform transmitting end;
the interference console is used for controlling the software to radio an interference environment construction platform through a network;
the software radio interference environment construction platform is used for transmitting interference signals and testing interference effects, and the interference signals are used for interfering a software radio frequency platform receiving end and a software radio frequency platform transmitting end;
the receiving end of the simulation operation platform controls the receiving end of the software radio frequency platform through a network;
the simulation operation platform transmitting end controls the software radio frequency platform transmitting end through the network.
One of the above technical solutions has the following advantages and beneficial effects:
according to the single-channel half-duplex soft non-equipment rapid receiving and transmitting method, medium, equipment and system, the software radio equipment driving layer, the radio frequency software layer and the application software layer are optimized, and related working parameters for changing a receiving/transmitting mode are separated from a receiving/transmitting equipment opening/closing link by initializing the working parameters and running a receiving/transmitting flow diagram program, so that the non-receiving and transmitting of the receiving/transmitting equipment opening/closing link is realized, the time delay of the single-channel half-duplex soft non-equipment in the communication process is greatly reduced, the signal transmission efficiency is improved, and the crosstalk between two equipment antennas is avoided. Compared with the traditional multichannel full duplex equipment, the single-channel half duplex soft equipment-free cost is about 1/30 of the cost of the traditional multichannel full duplex equipment, and the effect of greatly reducing the equipment cost is achieved.
Drawings
FIG. 1 is a flow chart of steps of a method for single channel half duplex soft non-device fast transceiving in one embodiment;
FIG. 2 is a schematic diagram of a receive flowsheet program operational component operational flow in one embodiment;
FIG. 3 is a schematic diagram of a flow diagram of the send-flowsheet program operational component operational flow in one embodiment;
FIG. 4 is a schematic diagram of a system for testing a radio frequency platform based on single-channel half-duplex soft non-equipment in one embodiment;
fig. 5 is a schematic diagram of a single channel half duplex soft wireless communication network system in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, it should be considered that the technical solutions are not combined, and are not within the scope of protection claimed by the present invention.
The application provides a single-channel half-duplex soft non-equipment rapid receiving and transmitting method, which is shown in fig. 1 and comprises the following steps:
102: starting a single-channel half-duplex soft non-equipment;
104: initializing a receiving mode working parameter;
106: starting a data receiving mode and running a receiving flow chart program; the receiving flow graph program is used for receiving and playing external analog audio signals;
108: stopping the data reception mode;
110: initializing a transmission mode working parameter;
112: starting a data transmission mode, and running a transmission flow chart program; the transmission flow graph program is used for transmitting the local analog audio signal;
114: stopping the data transmission mode;
116: repeating the step of initializing the working parameters of the receiving mode to stop the data sending mode, and executing the voice communication task of the single-channel half-duplex soft non-equipment;
118: and after the voice communication task is finished, closing the single-channel half-duplex soft non-equipment.
It will be appreciated that single-channel Half Duplex soft wireless devices, referred to as single-channel Half Duplex software radio devices, are used in this embodiment for transmitting audio signals, single channel means that there is only a single communication channel between transmission and reception, half Duplex (Half Duplex) means that data transmission can be transmitted in both directions on one signal carrier, but cannot be transmitted simultaneously.
It will be appreciated that the operating parameters of the transmit mode and the receive mode may be the same type, e.g., parameters such as center frequency, sample rate, bandwidth, gain value, and offset value, but may be different in size.
In one embodiment, a process of running a receive flowsheet program includes: receiving an external analog audio signal, and converting the external analog audio signal into an external digital audio signal; filtering the extraneous digital audio signal; resampling the filtered digital signal to obtain a low sampling rate audio signal; taking the modulus value of the low sampling rate audio signal to obtain a real number audio signal; removing the direct current component of the real audio signal to obtain a direct current-removed real audio signal; removing the high-frequency component of the DC real number audio signal to obtain a restored external analog audio signal, and playing the restored external analog audio signal.
It will be appreciated that the higher the sampling rate, the more sampling points per unit time, and that resampling of this embodiment is the process of extracting the low sampling rate signal from the signal.
In one embodiment, the step of removing the dc component of the real audio signal to obtain a dc-free real audio signal comprises: the real audio signal subtracts the self average value to obtain the DC-free real audio signal.
It will be appreciated that the dc component of the signal is the mean value of the signal, and thus the removal of the dc component of the real audio signal can be achieved by subtracting the mean value of the audio signal in the time domain.
In one embodiment, a process for running a send flow graph program includes: inputting a local analog audio signal, and converting the local analog audio signal into a local digital audio signal; removing high-frequency components of the local digital audio signal to obtain a low-pass real audio signal; converting the low-pass real audio signal into a low-pass complex audio signal; resampling the low-pass complex audio signal to obtain a high-sampling-rate audio signal; modulating the high sampling rate audio signal and transmitting the modulated high sampling rate audio signal to the antenna.
It will be appreciated that resampling of this embodiment is the process of extracting a high sample rate signal from a signal.
In one embodiment, the process of resampling a low-pass complex audio signal to obtain a high-sample-rate audio signal comprises: and performing two-stage resampling on the low-pass complex audio signal through an embedded constant coefficient multiplier to obtain a high-sampling-rate audio signal.
It will be appreciated that the multiplier may perform multiplication of two mutually uncorrelated digital signals for modulation, demodulation, mixing, phase demodulation, filtering, automatic gain control, etc. of the signals. A constant coefficient multiplier is a digital signal processing hardware component for performing multiplication of fixed coefficients with an input signal, and in a signal processing and control system, a digital filter and a transform algorithm multiply the input data with a predefined constant, which can be implemented efficiently, thereby reducing the power consumption of the overall system. In the embodiment, a constant coefficient multiplier is embedded, so that two-stage resampling can be realized, and the sampling rate conversion accuracy is improved.
In one embodiment, the operating parameters of the receive mode and the transmit mode include: center frequency, sample rate, bandwidth, gain value, and offset value.
It will be appreciated that when the on/off device is completely separated from the receiving and transmitting steps, a centralized initialization parameter common to the receiving process and the transmitting process may be set, for example: center frequency, sample rate, bandwidth, gain value, and offset value.
In one embodiment, the initialization is accomplished by invoking an initialization function during the process of initializing the receive mode operating parameters and initializing the transmit mode operating parameters.
It will be appreciated that the initialization function is self-written and may initialize centralized initialization parameters such as center frequency, sampling rate, bandwidth, gain values, offset values, etc.
The application also provides a readable storage medium, on which a driver is stored, which when executed by a processor, implements the steps of the single-channel half-duplex soft non-device fast transceiving method of any of the above embodiments.
It will be appreciated that the implementation of the driver need not alter the hardware devices, but rather need only be designed and modified at the software level.
The application also provides a single-channel half-duplex soft non-equipment, which comprises a switch component, an initialization component, a mode switching component, a receiving flow chart program operation component and a sending flow chart program operation component; the switch assembly is used for starting and closing the single-channel half-duplex soft non-equipment; the initialization component is used for initializing the working parameters of the receiving mode and the working parameters of the transmitting mode, and the working parameters of the receiving mode and the transmitting mode comprise: center frequency, sampling rate, bandwidth, gain value, and offset value; a mode switching component for starting and stopping a data receiving mode and a data transmitting mode; a receive flowsheet program execution component for executing a receive flowsheet program; the receiving flow graph program is used for receiving and playing external analog audio signals; a send flow graph program running component for executing the send flow graph program; the transmit flow graph program is used to transmit the local analog audio signal.
It will be appreciated that the single-channel half-duplex soft wireless device, together with the antenna, may be a communicable software radio-frequency platform, and that communication between different software radio-frequency platforms may be performed over a wired or wireless network.
In one embodiment, as shown in FIG. 2, the receive flowsheet program execution component comprises: an open Source mobile communication protocol Source module 201 (osmocom Source), an FIR Filter 202 (Frequency xlating FIR Filter), a rational resampling module 203 (Rational Resampler), a Complex modulo function module 204 (Complex to Mag), an isolated DC module 205 (DC block), a Low Pass Filter module 206 (Low Pass Filter) and an Audio Sink module 207 (Audio Sink).
The open source mobile communication protocol source module 201 is a soft non-signal source for receiving external analog audio signals, and converts the demodulated external analog audio signals into external digital audio signals; an FIR filter 202 for filtering the extraneous digital audio signal; a reasonable resampling module 203, configured to resample the filtered digital signal to obtain a low sampling rate audio signal; a complex modulo function 204 for modulo the low sample rate audio signal to obtain a real audio signal; the isolated direct current module 205 is configured to remove a direct current component by subtracting the self average value from the real audio signal to obtain a dc-removed real audio signal; the low-pass filtering module 206 is configured to remove a high-frequency component of the direct current real number audio signal, and obtain a restored external analog audio signal; the audio sink module 207 is configured to play the restored external analog audio signal.
It can be understood that in this embodiment, the sampling rate is set to 400ksps and the frequency is set to 26.9MHz in the open source mobile communication protocol source module 201, so that accurate frequency calibration is not required, two paths of digital signals with IQ balance are decoded by the channel after a/D conversion, the DC offset cancellation function is enabled, and the gain mode is not adopted; setting the center frequency as 100kHz and the sampling rate as 400ksps in the FIR filter 202, and changing the sampling rate through signal extraction is not needed; setting an interpolation value of 3 and then an extraction value of 25 in a reasonable resampling module 203 so as to reduce the sampling rate without setting passband bandwidth; no setup is required in the complex modulo function 204; setting the length to be 3.2k in the isolated direct current module 205, namely setting the length of each isolated direct current signal to be 3.2k; setting gain to 3 in the low-pass filtering module 206, no signal extraction, sampling rate to 48kHz, cut-off frequency to 24kHz, and cut-off transition band width to 400; the sampling rate is set to 48kHz in the audio sink module 207.
In one embodiment, as shown in FIG. 3, the send flow graph program execution component includes: an Audio Source module 301 (Audio Source), a Low Pass Filter 302 (Low Pass Filter), a real signal To Complex signal module 303 (flow To Complex), a first rational resampling module 304 (Rational Resampler), a constant coefficient multiplier 305 (multiple Const), a second rational resampling module 306 (Rational Resampler), and an open Source mobile communication protocol Sink module 307 (osmocom Sink).
An audio source module 301, configured to input a local analog audio signal, and convert the local analog audio signal into a local digital audio signal; a low-pass filter 302 for removing high-frequency components of the local digital audio signal to obtain a low-pass real audio signal; a real signal to complex signal module 303 for converting the low-pass real audio signal into a low-pass complex audio signal; a first rational resampling module 304, a constant coefficient multiplier 305 and a second rational resampling module 306, which are used for two-stage resampling of the low-pass complex audio signal to obtain a high-sampling rate audio signal with higher precision; the open source mobile communication protocol sink module 307 is a soft non-sink for transmitting analog audio signals, for converting digital audio signals into analog audio signals and modulating the analog audio signals, and transmitting the modulated high sample rate analog audio signals to the antenna.
It will be appreciated that in this embodiment, the sampling rate is set to 48kHz in the audio source module 301; setting gain to 1 in the low-pass filter 302, no signal extraction, sampling rate to 48kHz, cut-off frequency to 24kHz, and cut-off transition band width to 400; no setting is required in the real signal to complex signal module 303; setting an interpolation value of 25 and then a decimation value of 3 in the first reasonable resampling module 304 so as to improve the sampling rate without setting passband bandwidth; setting a constant coefficient to 400m in the constant coefficient multiplier 305; setting an interpolation value of 4 and then a decimation value of 1 in the second reasonable resampling module 306 so as to increase the sampling rate again without setting passband bandwidth; the open source mobile communication protocol sink module 307 has a sampling rate of 1.6Msps, a frequency of 27MHz (0.1 MHz worse than the previous source module is the calibration offset), no need for accurate frequency calibration, a radio frequency gain of 14dB, an intermediate frequency gain of 25dB, and a baseband gain of 10dB.
The application also provides a radio frequency platform test system based on the single-channel half-duplex soft non-equipment in any embodiment, as shown in fig. 4, including: an interference console 401, a software radio interference environment configuration platform 402, an analog console receiving end 403, an analog console transmitting end 404 and a single-channel half-duplex soft non-equipment; the single-channel half-duplex soft wireless device comprises a software radio frequency platform receiving end 405 and a software radio frequency platform transmitting end 406; the interference console 401 radio interference environment construction platform through network control software; the software radio interference environment configuration platform 402 is used for transmitting interference signals and testing interference effects, and the interference signals are used for interfering a software radio frequency platform receiving end and a software radio frequency platform transmitting end; the receiving end 403 of the analog console controls the receiving end 405 of the software radio frequency platform through a network; analog console transmitter 404 is configured to control software over the network to radio platform transmitter 406.
It will be appreciated that the receive flow graph program runs on the software radio platform receiver 405 in fig. 4; and the transmit flow graph program runs on the software radio platform transmitter 406 in fig. 4. The analog console operates the software radio frequency platform back end in a front end mode through a network cable. And a set of analog operation table and soft radio frequency-free platform can be used as a transmitting end and a receiving end. When the transmitting and receiving mode is switched, the receiving end and the transmitting end are switched.
As shown in fig. 5, a single-channel half-duplex soft wireless communication network system can be formed by a plurality of soft wireless platforms and analog operation platforms, wherein the network between the soft wireless platforms and the analog operation platforms in the system is usually directly connected by a network cable or can be connected by a local area network; the large network in fig. 5 may be a wired network or a wireless network, and the local area network data delay is typically less than 1 millisecond, and the wide area network data delay is typically only tens of milliseconds.
It can be understood that the single-channel half-duplex soft non-equipment in the system can be connected with the analog operation desk in an internal or external mode, wherein the internal mode comprises a card inserting mode and the like, and the external mode comprises a network cable mode, a USB mode and the like.
In order to more intuitively and comprehensively explain the utility of the single-channel half-duplex soft non-equipment communication network system and the single-channel half-duplex soft non-equipment, experimental verification is performed on the single-channel half-duplex soft non-equipment communication network system: after the soft non-equipment driver program of the single-channel half-duplex soft non-equipment is modified and recompiled, the test of the multi-time receiving and transmitting switching time is carried out, and the receiving and transmitting switching time delay is lower than 200 milliseconds. The test of actual voice is carried out, and the receiving end receives the voice and the sending end has 6 seconds delay, because the sending end Audio Source has previous noise data, the receiving end receives the voice delay caused by the noise data before receiving the effective voice, and the sending end Audio Source buffer area is emptied before sending and then starts sending. At this time, the delay between the receiving end and the transmitting end of the test real-time voice is controlled to be about 1 second, and the transmit-receive switching delay is tested again and is still lower than 200 milliseconds.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (12)
1. A single-channel half-duplex soft non-equipment rapid receiving and transmitting method is characterized by comprising the following steps:
starting a single-channel half-duplex soft non-equipment;
initializing a receiving mode working parameter;
starting a data receiving mode and running a receiving flow chart program; the receiving flow graph program is used for receiving and playing external analog audio signals;
stopping the data reception mode;
initializing a transmission mode working parameter;
starting a data transmission mode, and running a transmission flow chart program; the transmission flow graph program is used for transmitting local analog audio signals;
stopping the data transmission mode;
repeating the step of initializing the working parameters of the receiving mode to stop the data sending mode, and executing the voice communication task of the single-channel half-duplex soft non-equipment;
and after the voice communication task is finished, closing the single-channel half-duplex soft non-equipment.
2. The method for single-channel half-duplex soft non-equipment rapid transceiving according to claim 1, wherein the process of running a receive flowsheet program comprises the following steps:
receiving an external analog audio signal, and converting the external analog audio signal into an external digital audio signal;
filtering the extraneous digital audio signal;
resampling the filtered digital signal to obtain a low sampling rate audio signal;
taking a modulus value of the low sampling rate audio signal to obtain a real number audio signal;
removing the direct current component of the real audio signal to obtain a direct current-removed real audio signal;
and removing the high-frequency component of the DC-free real number audio signal to obtain a restored external analog audio signal, and playing the restored external analog audio signal.
3. The method for single-channel half-duplex soft non-equipment fast transceiving according to claim 2, wherein said removing a direct current component of said real audio signal to obtain a de-direct current real audio signal comprises:
and subtracting the self average value from the real audio signal to obtain the DC-free real audio signal.
4. The method for single-channel half-duplex soft non-equipment rapid transceiving according to claim 1, wherein the process of running a transmission flow graph program comprises the following steps:
inputting a local analog audio signal, and converting the local analog audio signal into a local digital audio signal;
removing high-frequency components of the local digital audio signal to obtain a low-pass real audio signal;
converting the low-pass real audio signal into a low-pass complex audio signal;
resampling the low-pass complex audio signal to obtain a high-sampling-rate audio signal;
modulating the high sampling rate audio signal, and transmitting the modulated high sampling rate audio signal to an antenna.
5. The method for single-channel half-duplex soft non-equipment fast transceiving according to claim 4, wherein said resampling said low-pass complex audio signal to obtain a high-sampling-rate audio signal comprises:
and performing two-stage resampling on the low-pass complex audio signal through an embedded constant coefficient multiplier to obtain a high-sampling-rate audio signal.
6. The single-channel half-duplex soft non-equipment rapid transceiving method according to claim 1, wherein operating parameters of the receiving mode and the transmitting mode comprise: center frequency, sample rate, bandwidth, gain value, and offset value.
7. The method for rapidly transceiving single-channel half-duplex soft non-equipment according to claim 6, wherein the initialization is realized by calling an initialization function in the process of initializing the receiving mode operation parameter and the initializing the transmitting mode operation parameter.
8. A readable storage medium having stored thereon a driver, wherein the driver, when executed by a processor, implements the steps of the single channel half duplex soft non-device fast transceiving method according to any of claims 1 to 7.
9. The single-channel half-duplex soft non-equipment is characterized by comprising a switch component, an initialization component, a mode switching component, a receiving flow chart program operation component and a sending flow chart program operation component;
the switch assembly is used for starting and closing single-channel half-duplex soft non-equipment;
the initialization component is configured to initialize a receiving mode operation parameter and a transmitting mode operation parameter, where the receiving mode operation parameter and the transmitting mode operation parameter include: center frequency, sampling rate, bandwidth, gain value, and offset value;
the mode switching component is used for starting and stopping a data receiving mode and a data sending mode;
the receiving flow graph program operation component is used for executing the receiving flow graph program; the receiving flow graph program is used for receiving and playing external analog audio signals;
the transmission flow graph program operation component is used for executing the transmission flow graph program; the transmit flowsheet program is for transmitting a local analog audio signal.
10. The single channel half duplex soft powerless device of claim 9, wherein the receive flowsheet program execution component comprises: the system comprises an open source mobile communication protocol information source module, an FIR filter, a reasonable resampling module, a complex modulus function module, an isolated direct current module, a low-pass filtering module and an audio information sink module;
the open source mobile communication protocol information source module is used for receiving external analog audio signals and converting the external analog audio signals into external digital audio signals;
the FIR filter is used for filtering the external digital audio signal;
the reasonable resampling module is used for resampling the filtered digital signal to obtain a low sampling rate audio signal;
the complex modulo function module is used for modulo the low sampling rate audio signal to obtain a real audio signal;
the isolation direct current module is used for removing direct current components of the real audio signal by subtracting the self average value to obtain a DC-removed real audio signal;
the low-pass filtering module is used for removing high-frequency components of the DC-removed real number audio signal to obtain a restored external analog audio signal;
the audio signal sink module is used for playing the restored external analog audio signals.
11. The single channel half duplex soft powerless device of claim 9, wherein the transmit flowsheet program execution component comprises: the system comprises an audio signal source module, a low-pass filter, a real signal to complex signal conversion module, a reasonable resampling module and an open source mobile communication protocol information sink module;
the audio signal source module is used for inputting local analog audio signals and converting the local analog audio signals into local digital audio signals;
the low-pass filter is used for removing high-frequency components of the local digital audio signal to obtain a low-pass real audio signal;
the real signal-to-complex signal module is used for converting the low-pass real audio signal into a low-pass complex audio signal;
the reasonable resampling module is used for carrying out two-stage resampling on the low-pass complex audio signal through an embedded constant coefficient multiplier to obtain a high-sampling-rate audio signal;
the open source mobile communication protocol information sink module is used for modulating the high sampling rate audio signal and sending the modulated high sampling rate audio signal to an antenna.
12. A single-channel half-duplex soft non-equipment-based radio frequency platform test system, comprising: an interference console, a software radio interference environment configuration platform, a simulation console receiving end, a simulation console transmitting end and the single-channel half-duplex soft non-equipment according to any one of claims 9-11;
the single-channel half-duplex soft wireless device comprises a software radio frequency platform receiving end and a software radio frequency platform transmitting end;
the interference console controls the software radio interference environment construction platform through a network;
the software radio interference environment construction platform is used for transmitting interference signals and testing interference effects, and the interference signals are used for interfering the software radio frequency platform receiving end and the software radio frequency platform transmitting end;
the receiving end of the simulation operation platform controls the receiving end of the software radio frequency platform through a network;
and the sending end of the simulation operation platform controls the sending end of the software radio frequency platform through a network.
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