CN110198195B - System and method for detecting transmission medium channel loss - Google Patents
System and method for detecting transmission medium channel loss Download PDFInfo
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- CN110198195B CN110198195B CN201910349132.8A CN201910349132A CN110198195B CN 110198195 B CN110198195 B CN 110198195B CN 201910349132 A CN201910349132 A CN 201910349132A CN 110198195 B CN110198195 B CN 110198195B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/391—Modelling the propagation channel
- H04B17/3911—Fading models or fading generators
Abstract
The invention is suitable for the technical field of communication, and provides a system and a method for detecting transmission medium channel attenuation parameters.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a system and a method for detecting transmission medium channel loss.
Background
With the development of communication technology, the existing communication technology frequency band is mainly focused on the microwave frequency band of 300MHz to 30GHz, so that the frequency band becomes very crowded.
Currently, the research direction of the communication technology is mainly a communication scheme of a low terahertz frequency band, for example, the fifth generation mobile communication technology is a research hotspot in academic circles and industrial circles in recent years. In the field of communication technology, no matter which frequency band a signal is transmitted in, a propagation characteristic test needs to be performed on the frequency band, and reference data is provided for equipment deployment. However, the millimeter wave spectrum of 30GHz to 300GHz is adopted in the fifth generation mobile communication technology, but the existing channel test scheme only aims at the channel test scheme of the frequency band lower than 60GHz, so that the channel test cannot be provided for the low terahertz frequency band, and further the reference data cannot be provided for the equipment deployment of the low terahertz frequency band.
Disclosure of Invention
In view of this, embodiments of the present invention provide a system and a method for detecting transmission medium channel loss, which can provide channel testing for a low terahertz frequency band and provide reference data for device deployment of the low terahertz frequency band.
A first aspect of an embodiment of the present invention provides a system for detecting a channel loss of a transmission medium, including:
the signal generation unit is used for generating an analog signal and obtaining a target signal with the frequency within a low terahertz frequency band based on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal;
the signal sending unit is used for radiating the target signal to a transmission medium, so that the target signal is attenuated when penetrating through the transmission medium to obtain an attenuated signal;
the distance control unit is used for adjusting and recording the receiving and transmitting distance value of the attenuation signal;
and the signal receiving and processing unit is used for receiving the attenuation signal and measuring and calculating the channel loss of the transmission medium based on the attenuation signal and the transceiving distance value.
A second aspect of the embodiments of the present invention provides a method for detecting a channel loss of a transmission medium, including:
generating an analog signal, and obtaining a target signal with the frequency within a low terahertz frequency band based on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal;
radiating the target signal to the position of a transmission medium, so that the target signal is attenuated when penetrating through the transmission medium to obtain an attenuated signal;
adjusting and recording the receiving and transmitting distance value of the attenuation signal;
and receiving the attenuation signal, and measuring and calculating the channel loss of the transmission medium based on the attenuation signal and the transceiving distance value.
The embodiment of the invention provides a system and a method for detecting transmission medium channel loss, wherein an analog signal is generated by a signal generating unit, a target signal with the frequency within a low terahertz frequency band is obtained based on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal, the target signal is radiated to a transmission medium by a signal sending unit, the target signal is attenuated when penetrating through the transmission medium to obtain an attenuation signal, a distance control unit is used for adjusting and recording a receiving and transmitting distance value of the attenuation signal, finally the attenuation signal is received by a signal receiving and processing unit, and the channel loss of the transmission medium is measured and calculated based on the attenuation signal and the receiving and transmitting distance value, so that a channel test is provided for the low terahertz frequency band, and reference data is provided for equipment deployment of the low terahertz frequency band.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a system for detecting a channel loss of a transmission medium according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an implementation of a method for detecting a channel loss of a transmission medium according to an embodiment of the present invention;
fig. 3 is a schematic view of the overall scheme of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, a schematic structural diagram of a system for detecting a channel loss of a transmission medium according to an embodiment of the present invention is shown.
A system 100 for detecting transmission medium channel loss, as shown in fig. 1, includes: a signal generating unit 10, a signal transmitting unit 20, a distance control unit 30, and a signal receiving and processing unit 40. Specifically, the method comprises the following steps:
and the signal generating unit 10 is used for generating an analog signal and obtaining a target signal with the frequency within the low terahertz frequency band based on the analog signal, and a preset radio frequency signal and an intermediate frequency suppression signal.
In this embodiment, the analog signals may be generated by one or more analog signal generators. And performing mixing processing and amplification processing on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal to obtain a target signal in a low terahertz frequency band.
In all embodiments of the present application, the analog signal generated by the signal generating unit 10 is a sine wave signal, which may carry information for the number of times of detection of the mark or the detection period, and by receiving and analyzing the attenuated signal, data samples of different detection periods can be distinguished or identified according to the information carried therein for the number of times of detection of the mark or the detection period, thereby improving the accuracy of the detection of the channel loss of the transmission medium.
It should be noted that, the analog signal is mixed with a preset radio frequency signal and an intermediate frequency suppression signal, specifically, the analog signal, the radio frequency signal and the intermediate frequency suppression signal may be mixed by a mixer, where a frequency of a signal obtained by the mixing process may be equal to a sum or a difference between a frequency of the analog signal and a frequency of the radio frequency signal, or a frequency obtained by combining the frequency of the analog signal and the frequency of the radio frequency signal in other manners.
Since the range of the electromagnetic spectrum that can be recognized and used is an electromagnetic signal between 3kHz and 300GHz, the frequency band can be divided into 8 bands of a very low frequency band, a middle frequency band, a high frequency band, a very high frequency band, an ultra high frequency band, and a terahertz radiation band. The frequency spectrum range of the very high frequency band, also called low terahertz frequency band, is between 30GHz and 300GHz, and the frequency spectrum range of the terahertz radiation frequency band is between 300GHz and 3 THz. Therefore, in this embodiment, the target signal with a frequency in the low terahertz frequency band obtained based on the analog signal and the radio frequency signal is a signal with a frequency spectrum range of 30GHz to 300 GHz.
The signal transmitting unit 20 is configured to radiate a target signal to a transmission medium, and attenuate the target signal when the target signal penetrates through the transmission medium to obtain an attenuated signal.
In this embodiment, the signal transmitting unit 20 may be a radio frequency signal radiator, and the transmission medium may be any one of gas, solid, or liquid.
It should be noted that, when the transmission medium is a gas, such as air, it means that there is no shielding object between the signal sending unit 20 (radio frequency signal radiator) and the signal receiving and processing unit 40. When the transmission medium is liquid or solid, it means that there is a shield between the signal transmitting unit 20 (radio frequency signal radiator) and the signal receiving and processing unit 40.
When there is a shielding object between the signal sending unit 20 (radio frequency signal radiator) and the signal receiving and processing unit 40, the signal sending unit 20 (radio frequency signal radiator) is in contact with the transmission medium, that is, the target signal radiated by the signal sending unit 20 (radio frequency signal radiator) is shielded by the transmission medium.
It should be noted that the target signal is attenuated when transmitted in any transmission medium, that is, no matter whether the target signal is shielded by a shielding object, the target signal is attenuated when transmitted through the transmission medium to obtain an attenuated signal, and the attenuated signal can be detected by a peripheral device for acquiring signals.
And a distance control unit 30 for adjusting and recording the transmitting and receiving distance value of the attenuation signal.
In the present embodiment, the distance control unit 30 adjusts and records the transmission/reception distance value of the obtained attenuated signal to be equal to the distance value between the signal transmitting unit 20 and the signal receiving and processing unit 40.
The distance control unit 30 may be disposed on the signal transmitting unit 20 and/or the signal receiving and processing unit 40, and may adjust and record the transmitting and receiving distance value of the attenuated signal by controlling the distance between the signal transmitting unit 20 and the signal receiving and processing unit 40.
In practical applications, the distance control unit 30 may include an infrared ranging unit, which includes a signal transmitting end and a signal receiving end, the signal transmitting end and the signal receiving end are respectively disposed on the control signal transmitting unit 20 and the signal receiving and processing unit 40, and the infrared signal is transmitted to the signal receiving end through the signal transmitting end, so as to measure and calculate the distance between the control signal transmitting unit 20 and the signal receiving and processing unit 40, that is, obtain the transceiving distance value of the attenuated signal.
And the signal receiving and processing unit 40 is used for receiving the attenuation signal and measuring and calculating the channel loss of the transmission medium based on the attenuation signal and the transceiving distance value.
In this embodiment, the channel loss of the transmission medium is measured and calculated based on the attenuation signal and the transceiving distance value, and specifically, the channel loss of the transmission medium is measured and calculated based on the attenuation degrees of the attenuation signals in a plurality of different transmission media and by combining the transceiving distance value.
In practical application, the attenuation degree of the attenuation signal can be detected by setting a power meter to perform signal intensity value detection on the received attenuation signal, taking the signal intensity value of the target signal as a reference intensity value, and comparing the signal intensity value of the attenuation signal with the reference intensity value to obtain the attenuation degree of the attenuation signal.
According to the system for detecting the channel loss of the transmission medium, provided by the embodiment of the invention, the signal generation unit is used for generating the analog signal, the target signal with the frequency within the low terahertz frequency band is obtained based on the analog signal, the preset radio frequency signal and the preset intermediate frequency suppression signal, the signal sending unit is used for radiating the target signal to the transmission medium, the target signal is attenuated when penetrating through the transmission medium to obtain the attenuation signal, the distance control unit is used for adjusting and recording the receiving and sending distance value of the attenuation signal, the signal receiving and processing unit is used for receiving the attenuation signal, the channel loss of the transmission medium is measured and calculated based on the attenuation signal and the receiving and sending distance value, the channel test for the low terahertz frequency band is realized, and the reference data is provided for the equipment deployment of the low terahertz frequency band.
As a possible implementation manner of this embodiment, the signal generating unit 10 may include:
and the local oscillation unit is used for generating an original analog signal.
And the frequency amplification unit is used for carrying out frequency amplification on the original analog signal to obtain an analog signal with the frequency within a low terahertz frequency band.
And the frequency mixing unit is used for carrying out frequency mixing processing on the analog signal, the radio frequency signal and the intermediate frequency suppression signal to obtain a frequency mixing signal with the frequency within a low terahertz frequency band.
And the power amplification unit is used for carrying out power amplification on the mixing signal to obtain a target signal with the frequency within a low terahertz frequency band.
Fig. 3 shows a schematic diagram of the overall scheme of the present invention, and in practical application, the local oscillation unit may use an analog signal generator with an operating frequency of 15.5GHz and a power of 3 dBm. The frequency amplification unit may be a 6-multiplier with a frequency band of 90GHz to 98GHz and an input power of 5 dBm. The frequency band field of the mixing unit is 75GHz to 110GHz, the intermediate frequency suppression signal can be a signal of 35GHz, the power of the analog signal is limited to 13dBm, and the power of the mixing signal is less than <18 dBm. The power amplifying unit may be a power amplifier, and the power amplifier may be a power amplifier having an operating frequency of 90GHz to 98GHz and a gain of 25 dB.
As a possible implementation manner of this embodiment, the signal sending unit 20 may include: and the transmitting antenna is used for radiating the target signal to the transmission medium according to the preset working frequency, so that the target signal is attenuated when passing through the shielding, and the attenuated signal is obtained.
As a possible implementation manner of this embodiment, it can be understood that, corresponding to the transmitting antenna, the signal receiving and processing unit 40 may include a device for acquiring the attenuated signal, that is, may include a receiving antenna for receiving the attenuated signal according to the preset operating frequency.
In practical application, the transmitting antenna and the receiving antenna can be antennas with working frequency of 75GHz to 110GHz, gain of 23dBi, main lobe width of E-plane 11 degrees and H-plane 12 degrees.
In addition, the signal receiving and processing unit 40 further includes:
and the low-noise amplification unit is used for carrying out low-noise amplification on the attenuation signal to obtain the amplified attenuation signal.
And the processing unit is used for measuring and calculating the channel loss of the transmission medium according to the amplified attenuation signal and the distance value.
In practical application, the low-noise amplification unit can be a low-noise amplifier with an operating frequency of 80GHz to 100GHz and a gain of 20 dB.
In all embodiments of the present application, the system 100 for detecting a channel loss of a transmission medium may further include a placement component, such as a placement stage or a clamping component, for disposing the transmission medium.
To improve the accuracy of the channel loss of the transmission medium, the transmission medium may be considered as a signal blockage when the transmission medium is liquid or solid. The liquid or solid transmission medium, that is, the shield, can also be hermetically arranged in the insulating container together with the transmitting antenna and the receiving antenna, wherein the transmission medium is arranged between the transmitting antenna and the receiving antenna, and the transmitting antenna and the receiving antenna can only transmit and receive signals from one direction.
As a possible implementation manner of this embodiment, the processing unit is specifically configured to measure and calculate, according to the amplified attenuation signal and the transceiving distance value, a channel loss of the transmission medium by using the following formula;
where PL is the channel loss of the transmission medium, A is the target signal attenuation rate, and A > 0, d is the distance value, d0 is a unit distance value, and d0 > 0, B is an environmental compensation constant, Σ γiN (0, σ) being the sum of the attenuation of the target signal through a plurality of said transmission media2) The standard deviation σ is 0.17dB for gaussian distributed random variables.
It should be noted that, in all embodiments of the present application, a is a target signal attenuation rate that is greater than 0, the target signal attenuation rate is related to the type of the transmission medium, target signal attenuation rates corresponding to different transmission media are different, and the larger the degree that the transmission medium blocks the target signal, the larger the target signal attenuation rate corresponding to the transmission medium is. And B is an environment compensation constant used for characterizing the influence degree of the property difference of the transmission medium on the channel loss, wherein the property of the transmission medium may include temperature, humidity, solid crystal structure and the like. N (0, sigma)2) The Gaussian distribution random variable is related to the attribute of the transmission medium and is used for distinguishing the Gaussian distribution condition of the transmission medium under different attribute differences.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for detecting a channel loss of a transmission medium according to an embodiment of the present invention.
As shown in fig. 2, a method for detecting a channel loss of a transmission medium includes:
step S10: and generating an analog signal, and obtaining a target signal with the frequency in a low terahertz frequency band based on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal.
In step S10, the analog signals may be generated by one or more analog signal generators. And performing mixing processing and amplification processing on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal to obtain a target signal in a low terahertz frequency band.
It should be noted that, the analog signal is mixed with a preset radio frequency signal and an intermediate frequency suppression signal, specifically, the analog signal, the radio frequency signal and the intermediate frequency suppression signal may be mixed by a mixer, where a frequency of a signal obtained by the mixing process may be equal to a sum or a difference between a frequency of the analog signal and a frequency of the radio frequency signal, or a frequency obtained by combining the frequency of the analog signal and the frequency of the radio frequency signal in other manners.
Step S20: and radiating the target signal to the position of the transmission medium, so that the target signal is attenuated when penetrating through the transmission medium, and obtaining an attenuated signal.
In step S20, the transmission medium may be any one of gas, solid, or liquid.
It should be noted that the target signal is attenuated in any transmission medium, and when the transmission medium is a gas, the target signal is not shielded by the shielding object, and when the transmission medium is a solid or a liquid, the target signal is shielded by the shielding object.
It can be understood that no matter whether the target signal is shielded by a shielding object, the signal attenuation phenomenon occurs when the target signal is transmitted through the transmission medium, so as to obtain an attenuated signal, and the attenuated signal can be detected by a surrounding device for acquiring signals.
Step S30: and adjusting and recording the transceiving distance value of the attenuation signal.
Step S40: and receiving the attenuation signal, and measuring and calculating the channel loss of the transmission medium based on the attenuation signal and the transceiving distance value.
In this embodiment, the channel loss of the transmission medium is measured and calculated based on the attenuation signal and the transceiving distance value, and specifically, the channel loss of the transmission medium is measured and calculated based on the attenuation degrees of the attenuation signals in a plurality of different transmission media and by combining the transceiving distance value.
In practical application, the attenuation degree of the attenuation signal can be detected by setting a power meter to perform signal intensity value detection on the received attenuation signal, taking the signal intensity value of the target signal as a reference intensity value, and comparing the signal intensity value of the attenuation signal with the reference intensity value to obtain the attenuation degree of the attenuation signal.
As a possible implementation manner of this embodiment, step S10 specifically includes:
generating an original analog signal; carrying out frequency amplification on the original analog signal to obtain an analog signal with the frequency within a low terahertz frequency band; carrying out frequency mixing processing on the analog signal, the radio frequency signal and the intermediate frequency suppression signal to obtain a frequency mixing signal with the frequency within a low terahertz frequency band; and performing power amplification on the mixing signal to obtain a target signal with the frequency within a low terahertz frequency band.
As a possible implementation manner of this embodiment, step S20 specifically includes:
and according to the preset working frequency, radiating the target signal to the transmission medium, and attenuating the target signal when the target signal is shielded to obtain an attenuated signal.
As a possible implementation manner of this embodiment, step S30 specifically includes:
receiving an attenuation signal according to a preset working frequency; carrying out low-noise amplification on the attenuation signal to obtain an amplified attenuation signal; and measuring and calculating the channel loss of the transmission medium according to the amplified attenuation signal and the distance value.
As a possible implementation manner of this embodiment, the step of measuring and calculating the channel loss of the transmission medium according to the amplified fading signal and the distance value includes:
according to the amplified attenuation signal and the transceiving distance value, measuring and calculating the channel loss of the transmission medium by the following formula;
where PL is the channel loss of the transmission medium, A is the target signal attenuation rate, and A > 0, d is the distance value, d0 is a unit distance value, and d0 > 0, B is an environmental compensation constant, Σ γiN (0, σ) being the sum of the attenuation of the target signal through a plurality of said transmission media2) The standard deviation σ is 0.17dB for gaussian distributed random variables.
In the present application, it is noted thatIn all embodiments, a is a target signal attenuation rate greater than 0, the target signal attenuation rate is related to the type of the transmission medium, target signal attenuation rates corresponding to different transmission media are different, and the greater the degree of shielding the target signal by the transmission medium, the greater the target signal attenuation rate corresponding to the transmission medium is. And B is an environment compensation constant used for characterizing the influence degree of the property difference of the transmission medium on the channel loss, wherein the property of the transmission medium may include temperature, humidity, solid crystal structure and the like. N (0, sigma)2) The Gaussian distribution random variable is related to the attribute of the transmission medium and is used for distinguishing the Gaussian distribution condition of the transmission medium under different attribute differences.
According to the method for detecting the channel loss of the transmission medium, provided by the embodiment of the invention, the analog signal is generated, the target signal with the frequency within the low terahertz frequency band is obtained based on the analog signal, the preset radio frequency signal and the preset intermediate frequency suppression signal, then the target signal is radiated to the transmission medium, so that the target signal is attenuated when passing through the shielding, and the attenuation signal is obtained, wherein the channel test for the low terahertz frequency band is realized by adjusting and recording the receiving and transmitting distance value of the attenuation signal, and finally, the channel loss of the transmission medium is measured and calculated based on the attenuation signal and the receiving and transmitting distance value, and the reference data is provided for the equipment deployment of the low terahertz frequency band.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A system for detecting transmission medium channel loss, the system comprising:
the signal generation unit is used for generating an analog signal and obtaining a target signal with the frequency within a low terahertz frequency band based on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal;
the signal sending unit is used for radiating the target signal to a transmission medium, so that the target signal is attenuated when penetrating through the transmission medium to obtain an attenuated signal;
the distance control unit is used for adjusting and recording the receiving and transmitting distance value of the attenuation signal;
and the signal receiving and processing unit is used for receiving the attenuation signal and measuring and calculating the channel loss of the transmission medium based on the attenuation signal and the transceiving distance value.
2. The system for detecting transmission medium channel loss according to claim 1, wherein said signal generating unit comprises:
a local oscillation unit for generating an original analog signal;
the frequency amplification unit is used for carrying out frequency amplification on the original analog signal to obtain an analog signal with the frequency within a low terahertz frequency band;
the frequency mixing unit is used for carrying out frequency mixing processing on the analog signal, the radio frequency signal and the intermediate frequency suppression signal to obtain a frequency mixing signal with the frequency within a low terahertz frequency band;
and the power amplification unit is used for carrying out power amplification on the mixing signal to obtain a target signal with the frequency within a low terahertz frequency band.
3. The system for detecting transmission medium channel loss according to claim 1, wherein the signal transmitting unit includes:
and the transmitting antenna is used for radiating the target signal to a transmission medium according to a preset working frequency, so that the target signal is attenuated when penetrating through the transmission medium, and an attenuated signal is obtained.
4. The system for detecting transmission medium channel loss according to claim 1, wherein the signal receiving and processing unit comprises:
the receiving antenna is used for receiving the attenuation signal according to a preset working frequency;
the low-noise amplification unit is used for carrying out low-noise amplification on the attenuation signal to obtain an amplified attenuation signal;
and the processing unit is used for measuring and calculating the channel loss of the transmission medium according to the amplified attenuation signal and the transceiving distance value.
5. The system according to claim 4, wherein the processing unit is specifically configured to measure the channel loss of the transmission medium according to the amplified fading signal and the transceiving distance value by the following formula;
where PL is the channel loss of the transmission medium, A is the target signal attenuation rate, and A > 0, d is the distance value, d0 is a unit distance value, and d0 > 0, B is an environmental compensation constant, Σ γiN (0, σ) being the sum of the attenuation of the target signal through a plurality of said transmission media2) The standard deviation σ is 0.17dB for gaussian distributed random variables.
6. A method of detecting transmission medium channel loss,
generating an analog signal, and obtaining a target signal with the frequency within a low terahertz frequency band based on the analog signal, a preset radio frequency signal and an intermediate frequency suppression signal;
radiating the target signal to the position of a transmission medium, so that the target signal is attenuated when penetrating through the transmission medium to obtain an attenuated signal;
adjusting and recording the receiving and transmitting distance value of the attenuation signal;
and receiving the attenuation signal, and measuring and calculating the channel loss of the transmission medium based on the attenuation signal and the transceiving distance value.
7. The method for detecting the channel loss of the transmission medium according to claim 6, wherein the generating an analog signal and obtaining a target signal with a frequency in a low terahertz frequency band based on the analog signal, and a preset radio frequency signal and an intermediate frequency suppression signal comprises:
generating an original analog signal;
carrying out frequency amplification on the original analog signal to obtain an analog signal with the frequency within a low terahertz frequency band;
performing frequency mixing processing on the analog signal, the radio frequency signal and the intermediate frequency suppression signal to obtain a frequency mixing signal with a frequency within a low terahertz frequency band;
and performing power amplification on the mixing signal to obtain a target signal with the frequency within a low terahertz frequency band.
8. The method of claim 6, wherein said radiating said target signal to a location of a transmission medium to attenuate said target signal as it passes through said transmission medium to obtain an attenuated signal comprises:
and according to a preset working frequency, radiating the target signal to a transmission medium, and attenuating the target signal when the target signal penetrates through the transmission medium to obtain an attenuated signal.
9. The method of claim 6, wherein said receiving said attenuated signal and estimating said channel loss of said transmission medium based on said attenuated signal and said transceive range value comprises:
receiving the attenuation signal according to a preset working frequency;
carrying out low-noise amplification on the attenuation signal to obtain an amplified attenuation signal;
and calculating the channel loss of the transmission medium according to the amplified attenuation signal and the transceiving distance value.
10. The method of claim 9, wherein said estimating the channel loss of the transmission medium based on the amplified fading signal and the transceiving range value comprises:
according to the amplified attenuation signal and the transceiving distance value, measuring and calculating the channel loss of the transmission medium by the following formula;
where PL is the channel loss of the transmission medium, A is the target signal attenuation rate, and A > 0, d is the distance value, d0 is a unit distance value, and d0 > 0, B is an environmental compensation constant, Σ γiN (0, σ) being the sum of the attenuation of the target signal through a plurality of said transmission media2) The standard deviation σ is 0.17dB for gaussian distributed random variables.
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