CN114785434B - Method, device, equipment, system and medium for detecting availability of S-band channel - Google Patents

Method, device, equipment, system and medium for detecting availability of S-band channel Download PDF

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CN114785434B
CN114785434B CN202210290712.6A CN202210290712A CN114785434B CN 114785434 B CN114785434 B CN 114785434B CN 202210290712 A CN202210290712 A CN 202210290712A CN 114785434 B CN114785434 B CN 114785434B
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communication channel
detected
communication
detection
value
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CN114785434A (en
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武昕坤
刘兵
刘懿
谢翔
王浩
徐龙
李洋
郭黎明
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Ruixinfeng Aerospace Technology Beijing Co ltd
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Beijing Rinfon Technology Co ltd
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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
    • 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
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/203—Details of error rate determination, e.g. BER, FER or WER
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0894—Packet rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

The application relates to a method, a device, equipment, a system and a medium for detecting the availability of S-band channels, wherein the method comprises the following steps: responding to a current detection starting instruction issued by communication equipment, and calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band; calculating and demodulating a judgment value of the signal-to-noise ratio sampling amplitude based on the theoretical background noise; acquiring signal amplitude module values of a plurality of sampling points of a communication channel, and comparing the mean value of the signal amplitude module values with a judgment value to obtain an availability detection result of the communication channel to be detected; and transmitting the availability detection result of the communication channel of the current frequency band which is detected to the communication equipment. The detection equipment detects the availability of all communication channels, so that the communication equipment can use the channels with good availability in the interference avoidance technology, and continuously and dynamically corrects the judgment value, so that the available level of the communication channels is in dynamic detection and adjustment, and the accuracy of the detection result of the communication channels in the electromagnetic environment is improved.

Description

Method, device, equipment, system and medium for detecting availability of S-band channel
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, a system, and a medium for detecting availability of an S-band channel.
Background
With the continuous development of communication technology, the electronic countermeasure field has also made great progress, and how to ensure the stability of link communication under the electronic countermeasure is another hot issue in the communication field at present. Most communication devices currently use a fixed frequency channel for communication, and in such a communication mechanism, once the communication frequency channel is interfered, the whole communication network is in a failure.
In order to ensure link communication in electronic countermeasure, interference avoidance techniques are used in the related art, and in the application of the interference avoidance techniques, the availability detection of the S-band channel is particularly important.
In view of the above-mentioned related art, a solution for detecting the availability of S-band channels is needed.
Disclosure of Invention
In order to detect channel availability, the application provides a method, a device, equipment, a system and a medium for detecting availability of S-band channels.
In a first aspect, the present application provides a method for detecting availability of an S-band channel, which adopts the following technical scheme:
a method for detecting availability of S-band channels comprises the following steps:
responding to a current detection starting instruction issued by communication equipment, and calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band;
calculating a judgment value of sampling amplitude values based on the theoretical background noise, wherein the judgment value comprises a first threshold value and a second threshold value, the first threshold value is the sampling amplitude values corresponding to the theoretical background noise and a demodulation signal-to-noise ratio, the second threshold value is a signal of the theoretical background noise plus idb and a sampling amplitude value corresponding to the demodulation signal-to-noise ratio, i is a positive value, and the second threshold value is larger than the first threshold value;
acquiring signal amplitude module values of a plurality of sampling points of a communication channel, and comparing the mean value of the signal amplitude module values with the first threshold value and the second threshold value to obtain an availability detection result of the communication channel to be detected;
within a current detection time period corresponding to the current detection starting instruction, if the communication channels to be detected are all detected, transmitting an availability detection result of the communication channels of which the detection is completed in the current frequency band to the communication equipment;
if the communication channel to be detected is not detected completely, taking the communication channel which is not detected completely as the communication channel to be detected, and waiting for receiving a next detection starting instruction issued by the communication equipment;
and responding to a next detection starting instruction issued by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band.
By adopting the technical scheme, the detection equipment detects the availability of all communication channels, so that the communication equipment can use the channels with good availability in the interference avoidance technology.
Optionally, the comparing the mean value of the signal amplitude modulus values with the first threshold value and the second threshold value to obtain the availability of the communication channel to be detected includes:
if the average value of the signal amplitude module values of the plurality of sampling points is smaller than a first threshold value, the available level of the communication channel is one level;
if the average value of the signal amplitude module values of the plurality of sampling points is between the first threshold value and the second threshold value, the available level of the communication channel is two levels;
if the average value of the signal amplitude module values of the plurality of sampling points is greater than the second threshold value, the available grade of the communication channel is three grades;
the channel quality of the communication channel with the first available level is better than that of the channel with the second available level, the channel quality of the communication channel with the second available level is better than that of the channel with the third available level, and the communication channel with the third available level is an unavailable channel.
By adopting the technical scheme, the availability of the communication channels corresponding to the available levels from the first level to the third level is gradually reduced, and in the interference avoidance technology, the channel with better availability is preferably selected according to the available level corresponding to the communication channel.
Optionally, after the transmitting the result of detecting the availability of the communication channel of the current frequency band, to the communication device, the method further includes:
receiving an error rate when a communication channel is communicated;
and correcting the judgment value of the communication channel based on the error rate, and taking the corrected judgment value as the judgment value of the communication channel.
By adopting the technical scheme, after the communication equipment uses the detected communication channel for communication, the communication equipment feeds back the error rate of the communication channel as a parameter to the detection equipment, and after the detection equipment receives the error rate parameter of the communication channel used by the communication equipment connected with the detection equipment, the judgment value of the corresponding communication channel is modified, so that the calibration of the available level of the communication channel is more accurate.
Optionally, after the modifying the determination value of the communication channel based on the bit error rate, the method further includes:
responding to a current detection starting instruction issued by the communication equipment, and acquiring the available level of the last detection of the communication channel to be detected of the current frequency band;
when the available level of the last detection of the communication channel to be detected is one level, acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected, wherein the number of the sampling points is a first numerical value;
when the available level of the last detection of the communication channel to be detected is three levels, acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected, wherein the number of the sampling points is a second numerical value, and the second numerical value is larger than the first numerical value;
comparing the average value of the signal amplitude values of the plurality of sampling points with the corrected judgment value to obtain the availability of the communication channel to be detected;
within a current detection period corresponding to the current detection start instruction, if the communication channels to be detected are all detected, transmitting an availability detection result of the communication channels of which the detection is completed in the current frequency band to the communication equipment, and executing a step of receiving an error rate when the communication channels are communicated;
if the communication channel to be detected is not detected completely, the communication channel which is not detected completely is used as the communication channel to be detected, and a next detection starting instruction issued by the communication equipment is waited to be received;
and responding to a next detection starting instruction issued by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of acquiring the available grade of the last detection of the communication channel to be detected of the current frequency band.
By adopting the technical scheme, the communication equipment and the detection equipment continuously and dynamically correct the judgment value according to the detection result of the last available level of the channel and the error rate parameter, so that the available level of the communication channel is in dynamic detection and adjustment, and the accuracy of the detection result of the communication channel in the electromagnetic environment is improved.
Optionally, the modifying the determination value of the communication channel based on the bit error rate includes:
if the error rate is lower than the error code threshold value, the correction quantity of the judgment value is zero;
if the error rate is higher than the error code threshold value, acquiring the current available grade of the communication channel;
if the current available level of the communication channel is one level, taking a first threshold value in the last detection as a second threshold value of the current detection, and taking a signal of actual background noise reduction idb of the first threshold value in the last detection and a sampling amplitude value corresponding to a demodulation signal-to-noise ratio as a first threshold value of the current detection;
if the current available level of the communication channel is three levels, taking the average value of the signal amplitude module values of a plurality of sampling points detected last time as a first threshold value of current detection, calculating actual background noise according to the first threshold value of current detection, and taking the signal of the actual background noise plus idb and a sampling amplitude value corresponding to a demodulation signal-to-noise ratio as a second threshold value of current detection.
Optionally, after the detection of the communication channels to be detected is completed, the method further includes:
acquiring the change times of the available level of the communication channel, and comparing the change times with a time threshold;
and if the change times are higher than the time threshold value, calibrating the available grade of the communication channel into three grades.
By adopting the technical scheme, when the change times are higher than the time threshold value, the electromagnetic environment fluctuation of the communication channel is large and the communication channel is not suitable for being used as the communication channel in the interference avoidance technology,
in a second aspect, the present application provides an apparatus for detecting availability of an S-band channel, which adopts the following technical solutions:
an apparatus for detecting availability of S-band channels, comprising:
the first response module is used for responding to a current detection starting instruction sent by the communication equipment and calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band;
the calculation module is used for calculating a judgment value of sampling amplitude values based on the theoretical background noise, the judgment value comprises a first threshold value and a second threshold value, the first threshold value is the sampling amplitude values corresponding to the theoretical background noise and a demodulation signal-to-noise ratio, the second threshold value is a signal of the theoretical background noise plus idb and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio, i is a positive value, and the second threshold value is larger than the first threshold value;
the first acquisition module is used for acquiring signal amplitude module values of a plurality of sampling points of a communication channel, and comparing the mean value of the signal amplitude module values with the first threshold value and the second threshold value to obtain an availability detection result of the communication channel to be detected;
a first output module, configured to transmit, to the communication device, an availability detection result of a communication channel of the current frequency band, where detection of the communication channel is completed, if the detection of the communication channel is completed in a current detection time period corresponding to the current detection start instruction;
the first waiting receiving module is used for taking the communication channel which is not detected as the communication channel to be detected when the communication channel to be detected is not detected, and waiting for receiving a next detection starting instruction sent by the communication equipment;
and the second response module is used for responding to a next detection starting instruction sent by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band.
In a third aspect, the present application provides an S-band channel availability detection device, which adopts the following technical solution:
an S-band channel availability detection device includes a housing, where the housing is provided with a radio frequency connector for receiving a radio frequency signal and an interaction interface for performing data interaction with a communication device to be detected, the housing is provided with a sampling module and a signal processing module, the signal processing module includes a chip and a memory, and the memory stores a computer program that can be loaded by the chip and execute the S-band channel availability detection method according to any of the first aspects.
In a fourth aspect, the present application provides a system for detecting availability of an S-band channel, which adopts the following technical solutions:
an S-band channel availability detection system includes the channel availability detection device of the third aspect, a receiving antenna, a communication device, and an upper computer connected to the communication device.
In a fifth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solutions:
a computer readable storage medium storing a computer program that can be loaded by a processor and executed to perform the S-band channel availability detection method according to any one of the first aspect.
Drawings
Fig. 1 is a block diagram of a detection apparatus 100 according to an embodiment of the present application.
Fig. 2 is a block diagram of an internal circuit of the detection apparatus 100 embodying an embodiment of the present application.
Fig. 3 is a block diagram of a detection system 200 according to an embodiment of the present disclosure.
Fig. 4 is a schematic flow chart of a detection method according to an embodiment of the present application.
Fig. 5 is a block diagram of a detection apparatus 400 according to an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the present application provides an S-band channel availability detection device 100, where the detection device 100 may be applied to channel availability detection in any frequency band, and the embodiment takes an S-band as an example. The detection device comprises a housing 101, and the upper part of the housing 101 is provided with an SMA radio frequency connector 102 for receiving radio frequency signals in an S frequency band.
The bottom of the housing 101 is provided with an interaction interface, the interaction interface includes a PCIE communication interface 103, the detection device 100 can perform data interaction with a communication device to be detected through the PCIE communication interface 103, the interactive data includes configuration parameters and a demodulation signal-to-noise ratio of the communication device, and meanwhile, the communication device supplies power to the detection device 100 through the PCIE communication interface 103. In this embodiment, the demodulation signal-to-noise ratio is +1.
The interactive interface further comprises a D89 communication interface 104 which is arranged on the side wall of the housing 101 and is used for performing data interaction with the communication device, wherein the D89 communication interface 104 comprises two SPI interfaces, when the communication device does not have the PCIE communication interface 103, the D89 communication interface 104 can perform data interaction with the communication device, and the interactive data comprises configuration parameters of the communication device.
A power interface 105 is further disposed on a sidewall of the housing 101, and when the PCIE communication interface 103 does not have a power supply condition, the detection apparatus 100 can be powered through the power interface 105. For example, when power using the power interface 105 is required, the power interface 105 may provide 15V-30V DC power to the detection device 100.
The detection device 100 further comprises a power module 106, a filtering module 107, a sampling module 108 and a signal processing module 109 arranged within the housing 101. The power module 106 may be configured to filter a power provided by the PCIE communication interface 103 and supply power to the filtering module 107, the sampling module 108, the signal processing module 109, and the like, and the power module 106 may further convert a voltage provided by the power interface 105 and supply power to the filtering module 107, the sampling module 108, the signal processing module 109, and the like.
The filtering module 107 comprises a filter, and after the rf connector 102 receives the rf signal in the S frequency band, the filtering module 107 filters the rf signal in the S frequency band, so that interference of other frequency signals is reduced, and accuracy of detection is improved. The sampling module 108 includes a high sampling rate AD9364 chip and its peripheral circuits, and the sampling module 108 is configured to convert a received radio frequency analog signal into a digital signal.
The signal processing module 109 includes a chip for driving a circuit of the communication interface, and in this embodiment, the chip is an FPGA chip, and the FPGA chip performs frequency conversion and filtering on the input digital signal. The signal processing module 109 further comprises a memory connected to the FPGA chip, the memory having stored thereon a computer program that can be loaded by the FPGA chip and that performs any of the S-band channel availability detection methods
The memory may be used to store an instruction, a program, code, a set of codes, or a set of instructions. The memory may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function, and instructions for implementing an S-band channel availability detection method, etc.; the storage data area may store data and the like involved in the S-band channel availability detection method.
The outer wall of the casing 101 is provided with a power supply indicator lamp 1011, and when the detection device 100 is powered on, the power supply indicator lamp 1011 is turned on. After the power is turned on, the detection device 100 starts to perform self-test, and the outer wall of the casing 101 is further provided with a work indicator 1012, and when the detection device 100 completes the self-test, the work indicator 1012 is turned on. In this embodiment, the number of the power supply indicator lamps 1011 is one, and the number of the operation indicator lamps 1012 is one.
Based on the same technical concept, the embodiment of the present application further provides an S-band channel availability detection system 200, which includes the detection device 100, the communication device 201, the receiving antenna 202, and the upper computer 203, where the detection device 100 is connected to a receiving end of the communication device 201, the receiving antenna 202 is connected to the communication device 201 through an antenna port of the communication device 201, and the communication device 201 is connected to the upper computer 203 through a serial port, a network port, or a fiber port.
As an optional implementation manner of this embodiment, a PCIE slot is disposed inside the communication device 201, and the detection device is connected to the PCIE slot through a PCIE communication interface. A power divider is arranged inside the communication device 201, a signal received by the communication device 201 is connected to the radio frequency connector of the detection device 100 after being divided by the power divider, and meanwhile, the communication device 201 supplies power to the detection device 100 through the PCIE communication interface.
As another optional implementation manner of this embodiment, the communication device 201 includes two D89 communication interfaces of the SPI, and a communication line is connected between the D89 communication interface of the communication device 201 and the D89 communication interface of the detection device 100.
Based on the same technical concept, an embodiment of the present invention further provides a method for detecting availability of an S-band channel, and the following detailed description is provided for a processing flow shown in fig. 2, including:
step S301: responding to a current detection starting instruction issued by communication equipment, and calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band;
the communication system presets the communication gap time of the communication equipment, the communication gap time is a period of time when the communication equipment does not transmit signals in communication, and the starting time of the communication gap time is the current detection starting instruction issued by the communication equipment.
In one embodiment, in order to enable the detecting device and the communication device to have the same communication parameters, step S301 further includes: configuring a second parameter based on the first parameter of the communication equipment, wherein the second parameter comprises the center frequency, the signal bandwidth and the detection duration of a frequency channel; and generating a baseband signal after mixing and filtering the frequency band radio frequency signal, wherein the baseband signal is the same as the baseband signal of the receiving end of the communication equipment.
After the detection device is powered on and self-detects, parameters such as the center frequency, the signal bandwidth, the detection time length, the demodulation signal-to-noise ratio and the like of a channel to be detected are configured through the PCIE communication interface or the D89 communication interface, for example, the center frequency of the channel is 3Ghz, the signal bandwidth is 8Mhz, the detection time length is 600us, and the demodulation signal-to-noise ratio is +1.
The detection equipment pre-configures the radio frequency signal to a corresponding mixing local oscillator through a digital DDS according to the configured central frequency of the channel, and then filters the mixed signal through a filter to generate a baseband signal which is the same as that of an actual receiving end of the communication equipment. Because the ratio of the transmitting frequency to the signal bandwidth may be higher, the frequency mixing processing is performed before the signal is filtered, so that the filtering effect is improved, and the accuracy of the subsequent detection result is improved.
Step S302: calculating a judgment value of the sampling amplitude based on the theoretical background noise, wherein the judgment value comprises a first threshold value and a second threshold value, the first threshold value is the sampling amplitude corresponding to the theoretical background noise and the demodulation signal-to-noise ratio, the second threshold value is a signal of the theoretical background noise plus idb and the sampling amplitude corresponding to the demodulation signal-to-noise ratio, i is a positive value, and the second threshold value is larger than the first threshold value;
after a current detection starting instruction sent by communication equipment is received, judging whether the detection equipment is subjected to first power-on detection or not, if the detection equipment is subjected to the first power-on detection, the first threshold values of the communication channels are both the theoretical background noise and default threshold values corresponding to the demodulation signal-to-noise ratio, wherein the theoretical background noise is calculated through a calculation formula of the thermal noise spectral density;
the thermal noise spectral density calculation formula is as follows: pn =10 log10 (K × T × W) + NF;
wherein K is Boltzmann constant =1.38 x 10^ -23J/K;
t is the Kelvin temperature, and the normal temperature is 290K;
w is signal bandwidth, unit hz;
NF is the noise coefficient of the receiver.
Pn =10 log10 (K T W) + NF is calculated in dbw, which needs to pass Pn +30 when converting dbw to dbm. In this embodiment, the bandwidth is 8Mhz, the noise coefficient of the receiver is generally 2-5, where 4 is taken, then: pn =10 log10 (1.38 × 10^ -23 × 290 × 8 × 1024) +30+4= -101.7dbm, and the theoretical noise floor is-101.7 dbm.
According to the AD configuration, the theoretical background noise and the judgment value corresponding to the demodulation signal-to-noise ratio are calculated, in the embodiment, the AD9364 internal gain is configured to be 70db, and the AD9364 internal configurable sampling range is-12 dbm-78 dbm.
The value of abs is calculated by 20 × log10 (abs) = noise floor value + internal gain + demodulation signal-to-noise ratio- (minimum value of sampling range), where abs is the modulus of the sampled amplitude value, and since the sampled amplitude value is a vector value, the modulus needs to be calculated.
In this embodiment, if the noise floor is-101.7, the internal gain is 70, the demodulation snr is +1, and the minimum value of the sampling range is-78, then 20 log10 (abs) = -101.7+70+1- (-78), and the value of abs is 231 according to the formula 10 ((((-30.7 + 78)/20)), and then the first threshold is 231.
The value of i is determined according to an empirical value, and is generally a positive value, in this embodiment, if the value of i is 3, the second threshold value is a signal of-98.7 dbm and a sampling amplitude corresponding to a demodulation signal-to-noise ratio of +1, the-98.7 dbm is taken as a background noise value and is substituted into the formula 20 × log10 (abs) = background noise value + internal gain + demodulation signal-to-noise ratio- (minimum value of sampling range), and if the sampling amplitude corresponding to the signal of-98.7 dbm and the demodulation signal-to-noise ratio of +1 is 327, the second threshold value is 327.
Step S303: acquiring signal amplitude module values of a plurality of sampling points of a communication channel, and comparing the mean value of the signal amplitude module values with a first threshold value and a second threshold value to obtain an availability detection result of the communication channel to be detected;
the detected communication channels are all provided with a plurality of sampling points, if the detection device is powered on for the first time for detection, the number of the sampling points of each communication channel is precisely detected according to a second value, and the second value can be set manually according to detection experience, for example, the second value can be 512. After the signal amplitude module values of the digital signals of the plurality of sampling points of the communication channel are sampled, calculating the mean value of the signal amplitude module values of the plurality of sampling points, and comparing the calculated signal amplitude module values with the first threshold value and the second threshold value to obtain the usability of the communication channel to be detected.
In one embodiment, step S302 further comprises: if the average value of the signal amplitude module values of the plurality of sampling points is smaller than a first threshold value, the available level of the communication channel is one level; if the average value of the signal amplitude module values of the plurality of sampling points is between a first threshold value and a second threshold value, the available level of the communication channel is two levels; if the average value of the signal amplitude module values of the plurality of sampling points is greater than a second threshold value, the available level of the communication channel is three levels; the channel quality of the communication channel with the available level of the first level is better than that of the channel with the available level of the second level, the channel quality of the communication channel with the available level of the second level is better than that of the channel with the available level of the third level, and the communication channel with the available level of the third level is an unavailable channel. In this embodiment, when the average value of the signal amplitude modulus values of the sampling points is less than 231, the available level of the communication channel is one level; when the average value of the signal amplitude module values of the sampling points is more than 231 and less than 327, the available grade of the communication channel is one grade; when the average value of the signal amplitude modulus of the sampling point is larger than 327, the available grade of the communication channel is three levels. Wherein, the availability of the first level to the third level is gradually reduced, and in the interference avoidance technology, a channel with better availability is preferentially selected according to the availability grade corresponding to the communication channel.
Step S304: within a current detection time period corresponding to a current detection starting instruction, if the communication channels to be detected are all detected, transmitting an availability detection result of the communication channels of the current frequency band, which are detected completely, to the communication equipment;
step S305: if the communication channel to be detected is not detected completely, the communication channel which is not detected completely is used as the communication channel to be detected, and a next detection starting instruction issued by the communication equipment is waited to be received;
step S306: and responding to a next detection starting instruction issued by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of calculating the theoretical background noise of the bandwidth of the communication channel to be detected of the current frequency band.
In one embodiment, step S304 is followed by: receiving the error rate when the communication channel is communicated; and correcting the judgment value of the communication channel based on the error rate, and taking the corrected judgment value as the judgment value of the communication channel.
As an optional implementation manner of this embodiment, the modifying the determination value of the communication channel based on the bit error rate includes: if the error rate is lower than the error code threshold, the correction of the judgment value is zero; if the error rate is higher than the error code threshold value, acquiring the current available grade of the communication channel; if the current available level of the communication channel is one level, taking a first threshold value in the last detection as a second threshold value of the current detection, and taking a signal of the actual bottom noise reduction idb of the first threshold value in the last detection and a sampling amplitude value corresponding to the demodulation signal-to-noise ratio as the first threshold value of the current detection; if the current available level of the communication channel is three levels, taking the average value of the signal amplitude module values of a plurality of sampling points detected last time as a first threshold value of current detection, calculating the actual background noise according to the first threshold value of current detection, and taking the signal of the actual background noise plus idb and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio as a second threshold value of current detection.
When the communication equipment uses the detected communication channel for communication, the communication equipment feeds back the error rate of the communication channel as a parameter to the detection equipment, and the detection equipment modifies the judgment value of the corresponding communication channel after receiving the error rate parameter of the communication channel used by the communication equipment connected with the detection equipment.
An error code threshold value is preset in the detection equipment, when the error code rate is below the error code threshold value, the communication requirement is met, and when the error code rate is above the error code threshold value, the communication requirement is not met. In this embodiment, the error threshold is e ^ -5.
For example, if the quality level of the communication channel is determined as three levels, and the average value of the signal amplitude modulus values of the sampling points is 400, the bit error rate is lower than e ^ -5 after the communication device uses the communication channel, and the communication channel is stable through long-time communication, the detection device increases the first threshold value from 231 to 400, abs is 400, and substitutes the formula 20 log10 (abs) = bottom noise value + internal gain + demodulation signal-to-noise ratio- (minimum sampling range), so that the signal of the AD sampling amplitude value is-25.6 dBm, i.e., -95.6dBm, the sampling amplitude value corresponding to the demodulation of +1 is the first threshold value, -92.6dBm, and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio of +1 is the second threshold value.
When the quality level of the communication channel is judged to be one level, the error rate is higher than e ^ -5 after the communication equipment uses the communication channel, the second threshold value is corrected from the signal of-98.7 dbm, the sampling amplitude value corresponding to the demodulation signal-to-noise ratio of +1 to the signal of-101.7 dbm and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio of +1, and the first threshold value is corrected from the signal of-101.7 dbm and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio of +1 to the sampling amplitude value corresponding to the demodulation signal-to-noise ratio of-104.7 dbm and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio of +1.
The first threshold value and the second threshold value are adjusted according to the error rate, the deviation of the detection result is reduced, and the judgment value is continuously and dynamically corrected through the communication equipment and the detection equipment according to the detection result of the last available channel level and the error rate parameter, so that the detection results of the communication equipment and the detection equipment in the electromagnetic environment are more accurate.
As another optional implementation manner of this embodiment, after correcting the determination value of the communication channel based on the bit error rate, the method further includes: responding to a current detection starting instruction issued by the communication equipment, and acquiring the available level of last detection of a communication channel to be detected of the current frequency band; when the available level of the last detection of the communication channel to be detected is one level, acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected, wherein the number of the sampling points is a first numerical value; when the available level of the last detection of the communication channel to be detected is three levels, acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected, wherein the number of the sampling points is a second numerical value, and the second numerical value is larger than the first numerical value; comparing the average value of the signal amplitude values of the plurality of sampling points with the corrected judgment value to obtain the availability of the communication channel to be detected; within the current detection time period corresponding to the current detection starting instruction, if the communication channels to be detected are all detected, transmitting the availability detection result of the communication channels of the current frequency band, which are detected, to the communication equipment, and executing the step of receiving the error rate when the communication channels are communicated; if the communication channel to be detected is not detected completely, the communication channel which is not detected completely is used as the communication channel to be detected, and a next detection starting instruction issued by the communication equipment is waited to be received; and responding to a next detection starting instruction issued by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of acquiring the available level of the last detection of the communication channel to be detected of the current frequency band.
When a next detection starting instruction is received, the corrected first threshold value and the corrected second threshold value are used as judgment values of communication channels, and all the communication channels are detected again, wherein the available level of the last detection judgment is three levels and unavailable, the fine detection of a second numerical value sampling point is carried out on the communication channels, the available level of the last detection judgment is one level, the coarse detection of a first numerical value sampling point is carried out on the available communication channels, the specific values of the first numerical value and the second numerical value can be set according to actual conditions, the first numerical value can be 125, the second numerical value can be 512, and the total detection time of all the communication channels is shortened by reducing the detection number of the available communication channels of the last detection judgment.
In one embodiment, after the detection of all the communication channels to be detected is completed, the method further includes: acquiring the change times of the available grade of the communication channel, and comparing the change times with a time threshold; if the number of changes is higher than the number threshold, the available level of the communication channel is calibrated to three levels.
If the number of times of changing the available level of the communication channel is higher than the number threshold, namely the first threshold and the second threshold of the communication channel are always in dynamic adjustment and are unstable for a long time, the electromagnetic environment of the communication channel fluctuates greatly and is not suitable for being used as the communication channel, and the available level of the communication channel is calibrated to be three levels representing unavailability.
The demodulation signal-to-noise ratio can enable the detection equipment to detect the influence of the current electromagnetic environment on each communication channel more quickly, if the parameter value of the demodulation signal-to-noise ratio is not available, each detection equipment can detect the influence by using the theoretical noise floor as a judgment value, and the accuracy of an accurate result is low.
Based on the same technical concept, the embodiment of the present invention further provides an apparatus 400 for detecting availability of S-band channels, the apparatus comprising:
a first response module 401, configured to respond to a current detection start instruction issued by a communication device, and calculate a theoretical noise floor of a bandwidth of a to-be-detected communication channel of a current frequency band;
a calculating module 402, configured to calculate a decision value of the sampling amplitude based on the theoretical background noise, where the decision value includes a first threshold and a second threshold, the first threshold is a sampling amplitude corresponding to the theoretical background noise and a demodulation signal-to-noise ratio, the second threshold is a signal of the theoretical background noise plus idb and a sampling amplitude corresponding to the demodulation signal-to-noise ratio, and i is a positive value, and the second threshold is greater than the first threshold;
the first obtaining module 403 is configured to obtain signal amplitude module values of multiple sampling points of a communication channel, and compare a mean value of the signal amplitude module values with a first threshold and a second threshold to obtain an availability detection result of the communication channel to be detected;
a first output module 404, configured to transmit, to the communication device, an availability detection result of a communication channel of a current frequency band, where detection of the communication channel is completed, if detection of the communication channel to be detected is completed in a current detection time period corresponding to the current detection start instruction;
a first waiting receiving module 405, configured to, when a communication channel to be detected is not detected completely, use the communication channel that is not detected completely as the communication channel to be detected, and wait for receiving a next detection start instruction issued by the communication device;
the second response module 406 is configured to, in response to a next detection start instruction issued by the communication device, take the next detection start instruction as a current detection start instruction, and perform a step of calculating a theoretical background noise of a bandwidth of a communication channel to be detected in a current frequency band.
As an optional implementation manner of this embodiment, the apparatus further includes:
the receiving module is used for receiving the error rate when the communication channel is communicated;
and the correcting module is used for correcting the judgment value of the communication channel based on the error rate and taking the corrected judgment value as the judgment value of the communication channel.
As an optional implementation manner of this embodiment, the apparatus further includes:
the third response module is used for responding to a current detection starting instruction issued by the communication equipment and acquiring the available level of the last detection of the communication channel to be detected of the current frequency band;
the second acquisition module is used for acquiring the signal amplitude values of a plurality of sampling points of the communication channel to be detected when the available level of the last detection of the communication channel to be detected is one level, wherein the number of the sampling points is a first numerical value;
the third acquisition module is used for acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected when the available level of the last detection of the communication channel to be detected is three levels, wherein the number of the sampling points is a second numerical value, and the second numerical value is larger than the first numerical value;
the comparison obtaining module is used for comparing the average value of the signal amplitude values of the plurality of sampling points with the corrected judgment value to obtain the availability of the communication channel to be detected;
a second output module, configured to transmit, in a current detection period corresponding to the current detection start instruction, an availability detection result of a communication channel of the current frequency band, for which detection is completed, to the communication device if all communication channels to be detected are detected, and perform a step of receiving an error rate when the communication of the communication channel is received;
the second waiting receiving module is used for taking the communication channel which is not detected as the communication channel to be detected when the communication channel to be detected is not detected, and waiting for receiving a next detection starting instruction sent by the communication equipment;
and the fourth response module is used for responding to a next detection starting instruction sent by the communication equipment, taking the next detection starting instruction as the current detection starting instruction, and executing the step of acquiring the available level of the last detection of the communication channel to be detected of the current frequency band.
As an optional implementation manner of this embodiment, the modification module includes:
the first correction submodule is used for judging that the correction quantity of the value is zero when the error rate is lower than the error code threshold value;
the obtaining submodule is used for obtaining the current available grade of the communication channel when the error rate is higher than the error code threshold value;
a second correction sub-module, configured to, when the current available level of the communication channel is one level, use a first threshold in a last detection as a second threshold of the current detection, and use a signal of an actual background noise subtraction idb of the first threshold in the last detection and a sampling amplitude corresponding to a demodulation signal-to-noise ratio as a first threshold of the current detection;
and the third correction sub-module is used for taking the average value of the signal amplitude module values of a plurality of sampling points detected last time as a first threshold value of the current detection when the current available level of the communication channel is three levels, calculating the actual background noise according to the first threshold value of the current detection, and taking the signal of the actual background noise plus idb and the sampling amplitude value corresponding to the demodulation signal-to-noise ratio as a second threshold value of the current detection.
As an optional implementation manner of this embodiment, the apparatus further includes:
the acquisition and comparison module is used for acquiring the change times of the available level of the communication channel and comparing the change times with a time threshold;
and the calibration module is used for calibrating the available grade of the communication channel into three grades when the change times are higher than the time threshold value.
Based on the same technical concept, embodiments of the present invention further provide a computer-readable storage medium storing a computer program capable of being loaded by a processor and executing the S-band channel availability detection method provided by the above embodiments.
In this embodiment, the computer readable storage medium may be a tangible device that retains and stores instructions for use by an instruction execution device. The computer readable storage medium may be, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination of the foregoing. In particular, the computer readable storage medium may be a portable computer diskette, a hard disk, a U-disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a podium random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a Digital Versatile Disc (DVD), a memory stick, a floppy disk, an optical disk, a magnetic disk, a mechanical coding device, and any combination thereof.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing description is only exemplary of the preferred embodiments of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application referred to in the present application is not limited to the embodiments in which the above-mentioned features are combined in particular, and also encompasses other embodiments in which the above-mentioned features or their equivalents are combined arbitrarily without departing from the concept of the application. For example, the above features may be replaced with (but not limited to) features having similar functions as those described in this application.

Claims (10)

1. A method for detecting availability of S-band channels, comprising:
responding to a current detection starting instruction issued by communication equipment, and calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band;
calculating a judgment value of sampling amplitude values based on the theoretical background noise, wherein the judgment value comprises a first threshold value and a second threshold value, the first threshold value is the sampling amplitude values corresponding to the theoretical background noise and a demodulation signal-to-noise ratio, the second threshold value is a signal of the theoretical background noise plus idb and a sampling amplitude value corresponding to the demodulation signal-to-noise ratio, i is a positive value, and the second threshold value is larger than the first threshold value; the described
The sampling amplitude is calculated by a formula 20 × log10 (modulus of the sampling amplitude) = bottom noise value + internal gain of the sampling chip + demodulation signal-to-noise ratio- (minimum value of sampling range configured inside the sampling chip);
acquiring signal amplitude module values of a plurality of sampling points of a communication channel, and comparing the mean value of the signal amplitude module values with the first threshold value and the second threshold value to obtain an availability detection result of the communication channel to be detected;
within a current detection time period corresponding to the current detection starting instruction, if the communication channels to be detected are all detected, transmitting the availability detection result of the communication channels of which the detection is finished in the current frequency band to the communication equipment;
if the communication channel to be detected is not detected completely, taking the communication channel which is not detected completely as the communication channel to be detected, and waiting for receiving a next detection starting instruction issued by the communication equipment;
and responding to a next detection starting instruction issued by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band.
2. The method according to claim 1, wherein the comparing the mean value of the signal amplitude modulus values with the first threshold value and the second threshold value to obtain the availability of the communication channel to be detected comprises:
if the average value of the signal amplitude module values of the plurality of sampling points is smaller than a first threshold value, the available grade of the communication channel is one grade;
if the average value of the signal amplitude module values of the plurality of sampling points is between the first threshold value and the second threshold value, the available level of the communication channel is two levels;
if the average value of the signal amplitude module values of the plurality of sampling points is greater than the second threshold value, the available grade of the communication channel is three grades;
the channel quality of the communication channel with the first available level is better than that of the channel with the second available level, the channel quality of the communication channel with the second available level is better than that of the channel with the third available level, and the communication channel with the third available level is an unavailable channel.
3. The method according to claim 2, wherein after said transmitting the result of detecting the availability of the communication channel of the current frequency band, further comprising:
receiving an error rate when a communication channel is communicated;
and correcting the judgment value of the communication channel based on the error rate, and taking the corrected judgment value as the judgment value of the communication channel.
4. The method of claim 3, further comprising, after said modifying the decision value of the communication channel based on the bit error rate:
responding to a current detection starting instruction issued by the communication equipment, and acquiring the available level of the last detection of the communication channel to be detected of the current frequency band;
when the available level of the last detection of the communication channel to be detected is one level, acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected, wherein the number of the sampling points is a first numerical value;
when the available level of the last detection of the communication channel to be detected is three levels, acquiring signal amplitude values of a plurality of sampling points of the communication channel to be detected, wherein the number of the sampling points is a second numerical value, and the second numerical value is larger than the first numerical value;
comparing the average value of the signal amplitude values of the plurality of sampling points with the corrected judgment value to obtain the availability of the communication channel to be detected;
within a current detection time period corresponding to the current detection start instruction, if the communication channels to be detected are all detected, transmitting an availability detection result of the communication channels of which the detection is completed in the current frequency band to the communication equipment, and executing a step of receiving an error rate when the communication channels are communicated;
if the communication channel to be detected is not detected completely, taking the communication channel which is not detected completely as the communication channel to be detected, and waiting for receiving a next detection starting instruction issued by the communication equipment;
and responding to a next detection starting instruction issued by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of acquiring the available grade of the last detection of the communication channel to be detected of the current frequency band.
5. The method of claim 3, wherein modifying the decision value for the communication channel based on the bit error rate comprises:
if the error rate is lower than the error code threshold value, the correction quantity of the judgment value is zero;
if the error rate is higher than the error code threshold value, acquiring the current available grade of the communication channel;
if the current available level of the communication channel is one level, taking a first threshold value in the last detection as a second threshold value of the current detection, and taking a signal of the actual bottom noise reduction idb of the first threshold value in the last detection and a sampling amplitude value corresponding to a demodulation signal-to-noise ratio as the first threshold value of the current detection;
if the current available level of the communication channel is three levels, taking the average value of the signal amplitude module values of a plurality of sampling points detected last time as a first threshold value of current detection, calculating actual background noise according to the first threshold value of current detection, and taking the signal of the actual background noise plus idb and a sampling amplitude value corresponding to a demodulation signal-to-noise ratio as a second threshold value of current detection.
6. The method according to claim 4, further comprising, after the detection of all the communication channels to be detected is completed:
acquiring the change times of the available level of the communication channel, and comparing the change times with a time threshold;
and if the change times are higher than the time threshold value, calibrating the available grade of the communication channel into three grades.
7. An apparatus for detecting availability of S-band channels, comprising:
the first response module is used for responding to a current detection starting instruction sent by the communication equipment and calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band;
a calculation module, configured to calculate a decision value of a sampling amplitude based on the theoretical background noise, where the decision value includes a first threshold and a second threshold, the first threshold is a sampling amplitude corresponding to the theoretical background noise and a demodulation signal-to-noise ratio, the second threshold is a signal of the theoretical background noise plus idb and a sampling amplitude corresponding to the demodulation signal-to-noise ratio, and i is a positive value, and the second threshold is greater than the first threshold; the sampling amplitude is calculated by a formula 20 × log10 (modulus of the sampling amplitude) = bottom noise value + chip internal gain + demodulation signal-to-noise ratio- (minimum value of sampling range configured inside the chip);
the first acquisition module is used for acquiring signal amplitude module values of a plurality of sampling points of a communication channel, and comparing the mean value of the signal amplitude module values with the first threshold value and the second threshold value to obtain an availability detection result of the communication channel to be detected;
a first output module, configured to transmit, to the communication device, an availability detection result of a communication channel of the current frequency band, where detection of the communication channel is completed, if the detection of the communication channel is completed in a current detection time period corresponding to the current detection start instruction;
the first waiting receiving module is used for taking the communication channel which is not detected as the communication channel to be detected when the communication channel to be detected is not detected, and waiting for receiving a next detection starting instruction sent by the communication equipment;
and the second response module is used for responding to a next detection starting instruction sent by the communication equipment, taking the next detection starting instruction as a current detection starting instruction, and executing the step of calculating the theoretical background noise of the bandwidth of the communication channel to be detected in the current frequency band.
8. An S-band channel availability detection device, comprising a housing, wherein the housing is provided with a radio frequency connector for receiving a radio frequency signal and an interaction interface for data interaction with a communication device to be detected, the housing is provided with a sampling module and a signal processing module, the signal processing module comprises a chip and a memory, and the memory stores a computer program that can be loaded by the chip and execute the method according to any one of claims 1 to 6.
9. An S-band channel availability detection system comprising the channel availability detection device of claim 8, a receiving antenna, a communication device, and an upper computer connected to the communication device.
10. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 6.
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