CN112383323B - Satellite spread spectrum parameter selection method, device, equipment and storage medium - Google Patents
Satellite spread spectrum parameter selection method, device, equipment and storage medium Download PDFInfo
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- CN112383323B CN112383323B CN202011239622.1A CN202011239622A CN112383323B CN 112383323 B CN112383323 B CN 112383323B CN 202011239622 A CN202011239622 A CN 202011239622A CN 112383323 B CN112383323 B CN 112383323B
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- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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- H—ELECTRICITY
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- H04B7/15—Active relay systems
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- H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
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Abstract
The application relates to a satellite spread spectrum parameter selection method, a satellite spread spectrum parameter selection device, a satellite spread spectrum parameter selection equipment and a storage medium. The method comprises the following steps: acquiring interference information corresponding to an available frequency band of a satellite; adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters; and broadcasting the target spread spectrum parameter to a terminal. The method can improve the anti-interference capability of the satellite uplink, thereby ensuring the reliability of data transmission.
Description
Technical Field
The present application relates to the field of satellite communications, and in particular, to a method, an apparatus, a device, and a storage medium for selecting a satellite spread spectrum parameter.
Background
As an effective complement to the terrestrial communication method, satellite mobile communication has been widely used in daily life. Generally, a satellite can communicate with a terminal by using a spread spectrum technique, that is, spread spectrum processing of data is performed between the satellite and the terminal by using a spread spectrum parameter. Therefore, proper selection of spreading parameters is critical for satellite communications. In order to improve the interference resistance of data transmitted between a terminal and a satellite, how to select a satellite spreading parameter is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the application provides a method, a device, equipment and a storage medium for selecting satellite spread spectrum parameters, so as to improve the anti-interference capability of a satellite uplink.
In a first aspect, an embodiment of the present application provides a method for selecting a satellite spreading parameter, including:
acquiring interference information corresponding to an available frequency band of a satellite;
adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters;
and broadcasting the target spread spectrum parameter to a terminal.
In a second aspect, an embodiment of the present application provides a satellite spreading parameter selection apparatus, including:
the first acquisition module is used for acquiring interference information corresponding to an available frequency band of a satellite;
the first adjusting module is used for adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters;
and the broadcasting module is used for broadcasting the target spread spectrum parameters to the terminal.
In a third aspect, an embodiment of the present application provides a spread spectrum device, installed in a satellite, and including a memory and a processor, where the memory stores a computer program, and the processor implements, when executing the computer program, the steps of the method for selecting a satellite spread spectrum parameter provided in the first aspect of the embodiment of the present application.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the satellite spreading parameter selection method provided in the first aspect of the embodiment of the present application.
According to the satellite spread spectrum parameter selection method, device, equipment and storage medium provided by the embodiment of the application, the spread spectrum equipment acquires the interference information corresponding to the available frequency band of the satellite, adjusts the initial spread spectrum parameter of the available frequency band according to the interference information to obtain the target spread spectrum parameter, and broadcasts the target spread spectrum parameter to the terminal. The spread spectrum equipment can adjust the initial spread spectrum parameters of the available frequency band of the satellite through the interference information corresponding to the available frequency band of the satellite, so that the anti-interference capability corresponding to the obtained target spread spectrum parameters is stronger, and therefore, when the uplink of the satellite is subjected to spread spectrum processing based on the target spread spectrum parameters, the anti-interference capability of the uplink can be improved, and the reliability of data transmission is improved.
Drawings
Fig. 1 is a schematic flowchart of a satellite spreading parameter selection method according to an embodiment of the present application;
fig. 2 is a schematic flowchart of another method for selecting a satellite spreading parameter according to an embodiment of the present application;
fig. 3 is a schematic flowchart of another method for selecting a satellite spreading parameter according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a satellite spreading parameter selection apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a spectrum spreading device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application are further described in detail by the following embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that the execution subject of the following method embodiments may be a satellite spread spectrum parameter selection apparatus, which may be implemented by software, hardware, or a combination of software and hardware to become part or all of spread spectrum equipment installed in a satellite. The following method embodiments are described by taking the example where the execution subject is a spreading device.
Fig. 1 is a schematic flowchart of a method for selecting a satellite spreading parameter according to an embodiment of the present disclosure. The embodiment relates to a specific process of how the spread spectrum device selects the satellite spread spectrum parameters. As shown in fig. 1, the method may include:
s101, acquiring interference information corresponding to an available frequency band of a satellite.
The available frequency band refers to a frequency band in which a terminal and a satellite can communicate with each other. Typically, the available frequency bands are one or more, represented by a set of available frequency bands. For example, the available band set of the satellite { BW } ═ BW }, is1,BW2,K,BWnIn which BW1、BW2、…、BWnRespectively, representing the available frequency bands of the satellite. The interference information refers to description information of an interference signal existing in an available frequency band, and may include a frequency band in which the interference signal interferes (i.e., an interference frequency band) and a power of the interference signal (i.e., an interference power). In general, the interference bands may also include one or more, represented by a set of interference bands. For example, the available frequency band set of the satellite corresponds to the interference frequency band set BWJ}＝{BW1 J,BW2 J,K,BWn JIn which BW1 J、BW2 J、…、BWn JRespectively representing the interference frequency band corresponding to each available frequency band of the satellite.
In a specific implementation, the spread spectrum device may periodically acquire an available frequency band set of the satellite, and an interference frequency band set and an interference power corresponding to the available frequency band set. Optionally, the interference detection device scans each available frequency band in the available frequency band set of the satellite to obtain an interference signal existing in the available frequency band set, and measures power and bandwidth of the interference signal, so as to obtain an interference frequency band set and an interference power corresponding to each available frequency band, and transmits the detected interference frequency band set and the detected interference power to the spread spectrum device. The interference detection device may be a device separate from the spread spectrum device, or may be an integrated device integrated with the spread spectrum device. The method and the device for acquiring the interference information corresponding to the available frequency band set by the spread spectrum equipment are not limited, and the corresponding acquisition mode can be selected based on actual requirements.
S102, adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters.
After the interference information corresponding to the available frequency band of the satellite is obtained, the spread spectrum device can obtain the interference condition existing in the available frequency band based on the interference information, and therefore the initial spread spectrum parameter of the available frequency band is adjusted based on the interference condition. In spread spectrum communication, the higher the spread spectrum parameter is, the smaller the original data is affected by the outside, and the stronger the anti-interference capability is. Therefore, when the interference of the interference signal to the available frequency band is known to be serious through the range of the interference frequency band and the magnitude of the interference power, the spread spectrum equipment can increase the initial spread spectrum parameters of the available frequency band so as to improve the anti-interference capability of the available frequency band. Alternatively, the spreading parameter may be a spreading factor.
As an alternative implementation, the process of S102 may be: and adjusting the initial spreading factor of the available frequency band or the available frequency band according to the interference information.
Specifically, after obtaining the interference information corresponding to the available frequency band, the spreading device may determine the type of the interference signal in the available frequency band based on the interference information, and adjust the initial spreading factor of the available frequency band or adjust the available frequency band based on the type of the interference signal. The types of the interference signals may include a narrowband interference signal and a wideband interference signal, where generally, the interference power of the narrowband interference signal is larger and the interference power of the wideband interference signal is smaller. Thus, when it is determined that the interference signal in the available frequency band is a wideband interference signal with a small interference power, the spreading device may adjust the initial spreading factor of the available frequency band, for example, increase the initial spreading factor of the available frequency band. When it is determined that the interference signal in the available frequency band is a narrowband interference signal with a large interference power, the spread spectrum device may adjust the available frequency band to avoid the interference frequency band.
S103, broadcasting the target spread spectrum parameter to the terminal.
The target spreading parameter refers to frequency band information of an uplink that can be communicated between a satellite and a terminal, and includes a target available frequency band and a target spreading factor corresponding to the target available frequency band. In the above S102, when the initial spreading parameter adjusted by the spreading device based on the interference information is the available frequency band of the satellite, the target available frequency band refers to the adjusted available frequency band. When the initial spreading parameter adjusted by the spreading device based on the interference information is the initial spreading factor corresponding to the available frequency band of the satellite, the target available frequency band refers to an unadjusted available frequency band.
After the target available frequency band and the target spreading factor corresponding to the target available frequency band are obtained, the spreading equipment broadcasts the target available frequency band and the target spreading factor corresponding to the target available frequency band to the terminal, so that the terminal performs spreading processing on the original data through the target available frequency band and the target spreading factor.
In order to adjust the initial spreading factor of the available frequency band, the spreading device needs to acquire the initial spreading factor of the available frequency band in advance. Meanwhile, in spread spectrum communication, when the spreading factor is larger, the stronger the anti-interference capability of data is, but the lower the data transmission speed is; conversely, the weaker the data interference resistance, but the higher the data transmission speed. Therefore, it is important for satellite communication to select the initial spreading factor of the available frequency band reasonably. Optionally, the process of obtaining the initial spreading factor may be: acquiring the minimum receiving power of a satellite; and selecting the minimum spreading factor meeting preset conditions from a preset mapping relation table according to the available frequency band and the minimum receiving power, and determining the minimum spreading factor as the initial spreading factor corresponding to the available frequency band.
The preset condition is that the minimum receiving power is greater than or equal to a target receiving sensitivity of the satellite, the target receiving sensitivity is obtained based on the minimum spreading factor, the available frequency band and the mapping relation table, and the mapping relation table includes corresponding relations among different frequency bands, different spreading factors and receiving sensitivities of the satellite.
The spread spectrum device may periodically select a minimum signal strength as a minimum received power of the satellite according to the signal strengths received on all available frequency bands, and select a minimum spreading factor, which makes the minimum received power greater than or equal to the reception sensitivity of the satellite, from the mapping table as an initial spreading factor corresponding to the available frequency band based on the minimum received power and the available frequency band. In spread spectrum communication, as the spreading factor is larger, the number of chips included in one symbol is larger, and accordingly, the data transmission rate is slower. Therefore, on the premise of ensuring that the satellite can correctly demodulate the data transmitted by the terminal, the minimum receiving power is selected to be larger than or equal to the minimum spreading factor of the receiving sensitivity of the satellite, and the highest data transmission rate can be ensured.
For example, the mapping relationship table may be as shown in table 1 below (where SF is spreading factor and BW is available frequency band):
TABLE 1
Assuming that the minimum received power of the satellite is-130 dBm and the available frequency band is 125kHz, the spreading device queries the minimum spreading factor, which makes the minimum received power of the satellite greater than or equal to the target receiving sensitivity of the satellite, from table 1 according to the available frequency band and the minimum received power, and the minimum spreading factor is 8 by table lookup. Thus, the spreading device can set the initial spreading factor corresponding to the available frequency band to 8.
According to the satellite spread spectrum parameter selection method provided by the embodiment of the application, the spread spectrum equipment acquires the interference information corresponding to the available frequency band of the satellite, adjusts the initial spread spectrum parameter of the available frequency band according to the interference information to obtain the target spread spectrum parameter, and broadcasts the target spread spectrum parameter to the terminal. The spread spectrum equipment can adjust the initial spread spectrum parameters of the available frequency band of the satellite through the interference information corresponding to the available frequency band of the satellite, so that the anti-interference capability corresponding to the obtained target spread spectrum parameters is stronger, and therefore, when the uplink of the satellite is subjected to spread spectrum processing based on the target spread spectrum parameters, the anti-interference capability of the uplink can be improved, and the reliability of data transmission is improved.
In an embodiment, a specific process of adjusting, by the spreading device, the initial spreading factor of the available frequency band or the available frequency band according to the interference information corresponding to the available frequency band is further provided. Based on the foregoing embodiment, optionally, as shown in fig. 2, the above process of adjusting the initial spreading factor or the available frequency band of the available frequency band according to the interference information may be:
s201, judging whether the interference frequency band exceeds a bandwidth threshold of the available frequency band.
The bandwidth threshold is used to represent the percentage of the interference frequency band occupying the available frequency band, and may be set according to actual requirements. The spread spectrum device can calculate the interference band BWi JOccupying available band BWiComparing the actual ratio with a preset bandwidth threshold, if the actual ratio is greater than or equal to the judgment bandwidth threshold (i.e. the interference frequency band exceeds the bandwidth threshold of the available frequency band), considering the interference signal in the available frequency band as a broadband interference signal, and executing the following step S202, if the actual ratio is less than the judgment bandwidth threshold (i.e. the interference frequency band does not exceed the bandwidth threshold of the available frequency band), considering the interference signal in the available frequency band as a narrowband interference signalAnd performs the following S203.
And S202, increasing the initial spreading factor corresponding to the available frequency band.
In particular, the initial interference tolerance is related to the initial spreading factor. Generally, a broadband interference signal occupies more bandwidth of an available frequency band, but its interference power is generally smaller, and for this situation, the spread spectrum device may increase an initial spreading factor corresponding to the available frequency band to improve the interference rejection capability of the available frequency band. Alternatively, the spreading device may increase the initial spreading factor SF corresponding to the available frequency band based on the following formula 1 or a variation of formula 11：
Equation 1: SF1＝SF1+n1；
Wherein n is1Is a positive integer, n1The settings may be based on actual needs. Optionally, n1May have a value of 1.
Since the power of the interference signal in the available frequency band is still high, the interference rejection capability of the available frequency band is still not required. Therefore, in order to further improve the anti-interference capability of the available frequency band, the initial spreading factor corresponding to the available frequency band may be adjusted multiple times. On the basis of the foregoing embodiment, optionally, the step of increasing the initial spreading factor corresponding to the available frequency band may include: and when the interference power is determined to exceed the updated initial interference tolerance, continuing to increase the adjusted initial spreading factor.
Wherein the initial interference tolerance is related to the initial spreading factor and is smaller than the interference power detection threshold mentioned in S203, and the initial interference tolerance may be understood as the maximum interference resistance that can be provided by the available frequency band at the initial spreading factor. Therefore, after the spreading factor corresponding to the available frequency band is changed, the interference tolerance corresponding to the available frequency band is also changed. Thus, after the initial spreading factor corresponding to the available frequency band is adjusted, the spreading device can re-adjust the initial spreading factor based on the adjusted initial spreading factorAnd calculating the interference tolerance corresponding to the available frequency band, and updating the initial interference tolerance corresponding to the available frequency band based on the calculated interference tolerance. Alternatively, the spread spectrum device may calculate the interference tolerance M corresponding to the available frequency band by using the following formula 2 or a modification of the following formula 2i：
Equation 2: mi＝Gp-(Ls+(S/N)O)；
Wherein G ispFor spreading gain (spreading gain is the same size as spreading factor), LsFor system loss, (S/N)OThe signal-to-noise ratio required for the baseband demodulator.
After updating the initial interference tolerance corresponding to the available frequency band, in order to further improve the anti-interference capability of the satellite uplink, the spread spectrum device continues to determine whether the interference power corresponding to the available frequency band exceeds the updated initial interference tolerance, and if so (i.e., when it is determined that the interference power exceeds the updated initial interference tolerance), continues to adjust the adjusted initial spreading factor according to the above formula 1 or the variant of the formula 1. In practical application, the adjustment times of the spreading factor may be set, and if the interference power of the interference signal still exceeds the updated interference tolerance of the available frequency band after the adjustment times, it is determined that the available frequency band has very serious interference, and the frequency band is determined as an unfit frequency band. Certainly, in practical applications, the spreading factor supported by hardware in the spreading device also has an upper limit value, and therefore, the spreading device needs to compare the initial spreading factor after each adjustment with the upper limit value, and if the initial spreading factor is greater than the upper limit value, determine that the frequency band is a non-communicable frequency band.
S203, when the interference power is determined not to exceed the interference power detection threshold of the available frequency band, increasing an initial spreading factor corresponding to the available frequency band; or, when it is determined that the interference power exceeds the interference power detection threshold of the available frequency band, adjusting the available frequency band.
Specifically, the interference power detection threshold is associated with the initial spreading factor, and the interference power is not adjusted without limit because the initial spreading factor cannot be adjusted without limitThe detection threshold may be understood as the maximum interference rejection capability that the available frequency band can provide after the initial spreading factor is maximally adjusted. The spread spectrum device may calculate the interference power detection threshold η by the following equation 3 or a variation of equation 3L：
Equation 3: etaL＝(Gp+n2)-(Ls+(S/N)O)；
Wherein n is2Is a positive integer (n)2Can be set based on actual needs), GpFor spreading gain (spreading gain is the same size as spreading factor), LsFor system loss, (S/N)OThe signal-to-noise ratio required for the baseband demodulator. Optionally, n is2The value of (d) may be 2.
Generally, a narrow-band interference signal occupies a small bandwidth of an available frequency band, but its interference power is generally large, and for a narrow-band interference signal with a large interference power, if only a spreading factor corresponding to the available frequency band is adjusted, a data transmission rate of a terminal may be greatly reduced. In order to achieve the purpose of improving the anti-interference capability of an uplink and ensuring that the data transmission rate cannot be greatly reduced, for the situation, the spread spectrum device can further determine whether the interference power of the interference signal exceeds the interference power detection threshold of the available frequency band, so as to determine whether the anti-interference capability of the available frequency band can be improved by adjusting the initial spreading factor corresponding to the available frequency band. If the frequency band exceeds the preset frequency band, the initial spreading factor corresponding to the available frequency band is not recommended to be adjusted, and at the moment, a bandwidth adjustment strategy can be adopted to avoid the interference frequency band of the interference signal. If not, it indicates that there is an adjustment space for the spreading factor, and at this time, the initial spreading factor corresponding to the available frequency band may be increased.
In practical application, the narrowband interference signal may be distributed in a front part, a middle part or a rear part of the available frequency band, the front part may be understood as an initial frequency point close to the available frequency band, the middle part may be understood as an initial frequency point neither close to the available frequency band nor a termination frequency point close to the available frequency band, and the rear part may be understood as a termination frequency point close to the available frequency band. The adjustment strategies for the available frequency bands are also different for different distribution situations of the narrowband interference signals. For this case, the adjustment of the available frequency band may be performed with reference to the procedure of the following embodiment. Based on the above embodiments, optionally, the spread spectrum device may adjust the available frequency band based on the distribution of the narrowband interference signal in the available frequency band.
In one embodiment, as shown in fig. 3, the process of the spreading device adjusting the available frequency band may be:
s301, acquiring a first difference value between a first initial frequency point of the available frequency band and a second initial frequency point of the interference frequency band, and acquiring a second difference value between a first termination frequency point of the available frequency band and a second termination frequency point of the interference frequency band.
Wherein the available band BW is assumediIs [ f ]start,fend]Available band BWiCorresponding interference band BWJ iIs [ f ]J start,fJ end]The spread spectrum equipment is according to the first initial frequency point fstartAnd a second initial frequency point fJ startCalculating a first difference value according to the first termination frequency point fendAnd a second termination frequency point fJ endA second difference is calculated. Then, the spread spectrum device compares the first difference and the second difference with the minimum channel bandwidth, and executes S302 when both the first difference and the second difference are greater than or equal to the minimum channel bandwidth (i.e. in the first case: the interference signal is located in the middle of the available frequency band); when the first difference is greater than or equal to the minimum channel bandwidth and the second difference is less than the minimum channel bandwidth (i.e. in the second case: the interference signal is located in the rear part of the available frequency band), S303 is executed; when the first difference is smaller than the minimum channel bandwidth (i.e., the third case where the interference signal is located in the front portion of the available frequency band), S304 is performed.
S302, dividing the available frequency band into a first target available frequency band and a second target available frequency band.
Wherein the range of the first target available frequency band is [ the first initial frequency point, the second initial frequency point ]]The range of the second target available frequency band is [ the second termination frequency point, the first termination frequency point ]]. Since the interference signal is located in the middle of the available frequency band, in order to avoid the interference frequency band, the spread spectrum device divides the available frequency band into a first target available frequency band and a second target available frequency band with the interference frequency band as a boundary. Continuing with the example in S301, the range of the divided first target available frequency band is [ fstart,fJ strat]The second target available frequency band is in the range of [ fJ end,fend]。
S303, dividing the available frequency band into a third target available frequency band.
Wherein the third target available frequency range is [ the first initial frequency point, the second initial frequency point ]]. Since the interference signal is located in the rear portion of the available frequency band, in order to avoid the interference frequency band, the spread spectrum device divides the available frequency band into a third target available frequency band with the second initial frequency band of the interference frequency band as a boundary. Continuing with the example in S301, the range of the divided third target available frequency band is [ fstart,fJ strat]。
S304, the available frequency band is divided into a fourth target available frequency band.
Wherein the range of the fourth target available frequency band is [ the second termination frequency point, the first termination frequency point ]]. Since the interference signal is located in the front part of the available frequency band, in order to avoid the interference frequency band, the spread spectrum device divides the available frequency band into a fourth target available frequency band with the second termination frequency band of the interference frequency band as a boundary. Continuing with the example in S301, the range of the divided fourth target available frequency band is [ fJ end,fend]。
In spread spectrum communication, the larger the spreading factor, the larger the number of chips contained in one symbol, and the slower the data transmission rate. Therefore, in order to improve the data interference resistance and also consider the data transmission rate, on the basis of the above embodiment, optionally, after the available frequency band is adjusted, the spreading device may further determine an initial spreading factor corresponding to the adjusted available frequency band, and reduce the initial spreading factor corresponding to the adjusted available frequency band.
Specifically, for the first case in the bandwidth adjustment policy: when the spread spectrum device divides the available frequency band into a first target available frequency band and a second target available frequency band, the spread spectrum device determines an initial spreading factor SF corresponding to the first target available frequency band and the second target available frequency band2And reducing the initial spreading factor SF corresponding to the first target available frequency band and the second target available frequency band2。
After dividing the available frequency band into a first target available frequency band and a second target available frequency band, the spread spectrum device uses the initial spreading factors corresponding to the available frequency bands as initial spreading factors SF corresponding to the first target available frequency band and the second target available frequency band, respectively2And reducing the initial spreading factor SF corresponding to the first target available band and the second target available band according to the following formula 4 or a modification of formula 42。
Equation 4: SF2＝SF2-n3；
Wherein n is3Is a positive integer, n3The settings may be based on actual needs. Optionally, n3May have a value of 1.
For a second case of the above bandwidth adjustment policy: when the spreading device divides the available frequency band into a third target available frequency band, the spreading device may determine an initial spreading factor SF corresponding to the third target available frequency band2And reducing the initial spreading factor SF corresponding to the third target available frequency band2。
After dividing the available frequency band into a third target available frequency band, the spread spectrum device uses the initial spreading factors corresponding to the available frequency band as initial spreading factors SF corresponding to the third target available frequency band respectively2And reducing the initial spreading factor SF corresponding to the third target available frequency band according to the above equation 4 or the variation of equation 42。
For the third case in the above bandwidth adjustment strategy: when the spread spectrum equipment divides the available frequency band into the fourth orderWhen the available frequency band is marked, the spread spectrum equipment determines the initial spread spectrum factor SF corresponding to the fourth target available frequency band2And reducing the initial spreading factor SF corresponding to the third target available frequency band2。
After dividing the available frequency band into a fourth target available frequency band, the spreading equipment uses the initial spreading factors corresponding to the available frequency band as initial spreading factors SF corresponding to the fourth target available frequency band respectively2And reducing the initial spreading factor SF corresponding to the fourth target available frequency band according to the above equation 4 or the variation of equation 42。
Certainly, in practical applications, the spreading factor supported by hardware in the spreading device also has a lower limit value, so that after the initial spreading factor corresponding to the adjusted available frequency band is reduced, the spreading device may further compare the reduced initial spreading factor with the lower limit value, and if the reduced initial spreading factor is smaller than the lower limit value, update the reduced initial spreading factor to the lower limit value.
In this embodiment, the spread spectrum device may determine the specific type of the interference signal by comparing the interference frequency band with the bandwidth threshold of the available frequency band, and select to adjust the initial spreading factor of the available frequency band or adjust the available frequency band based on the specific type of the interference signal, so that the adjusted spreading parameters have pertinence, and the interference rejection capability of the uplink is further improved. Meanwhile, after the available frequency band is adjusted, the initial spreading factor corresponding to the adjusted available frequency band can be reduced, the anti-interference capability of the uplink is improved, the data transmission rate can be considered, and the balance between the improvement of the anti-interference capability of the uplink and the guarantee that the data transmission rate cannot be greatly reduced is realized.
Fig. 4 is a schematic structural diagram of a satellite spreading parameter selection apparatus according to an embodiment of the present application. As shown in fig. 4, the apparatus may include: a first obtaining module 40, a first adjusting module 41 and a broadcasting module 42;
specifically, the first obtaining module 40 is configured to obtain interference information corresponding to an available frequency band of a satellite;
the first adjusting module 41 is configured to adjust the initial spreading parameter of the available frequency band according to the interference information, so as to obtain a target spreading parameter;
the broadcasting module 42 is configured to broadcast the target spreading parameter to the terminal.
According to the satellite spread spectrum parameter selection device provided by the embodiment of the application, the spread spectrum equipment acquires the interference information corresponding to the available frequency band of the satellite, adjusts the initial spread spectrum parameter of the available frequency band according to the interference information to obtain the target spread spectrum parameter, and broadcasts the target spread spectrum parameter to the terminal. The spread spectrum equipment can adjust the initial spread spectrum parameters of the available frequency band of the satellite through the interference information corresponding to the available frequency band of the satellite, so that the anti-interference capability corresponding to the obtained target spread spectrum parameters is stronger, and therefore, when the uplink of the satellite is subjected to spread spectrum processing based on the target spread spectrum parameters, the anti-interference capability of the uplink can be improved, and the reliability of data transmission is improved.
On the basis of the foregoing embodiment, optionally, the first adjusting module 41 is specifically configured to adjust the initial spreading factor of the available frequency band or the available frequency band according to the interference information.
On the basis of the above embodiment, optionally, the first adjusting module 41 includes: the device comprises a judging unit, a first adjusting unit and a second adjusting unit;
specifically, the determining unit is configured to determine whether the interference frequency band exceeds a bandwidth threshold of the available frequency band;
the first adjusting unit is used for increasing an initial spreading factor corresponding to the available frequency band when the judging unit judges that the interference frequency band exceeds the bandwidth threshold of the available frequency band;
the second adjusting unit is configured to increase an initial spreading factor corresponding to the available frequency band when the determining unit determines that the interference frequency band does not exceed the bandwidth threshold of the available frequency band and when it is determined that the interference power does not exceed the interference power detection threshold of the available frequency band; or, when it is determined that the interference power exceeds the interference power detection threshold of the available frequency band, adjusting the available frequency band; wherein the interference power detection threshold is related to the initial spreading factor.
On the basis of the foregoing embodiment, optionally, the first adjusting unit is specifically configured to increase an initial spreading factor corresponding to the available frequency band, update an initial interference tolerance corresponding to the available frequency band according to the adjusted initial spreading factor, and continue to increase the adjusted initial spreading factor when it is determined that the interference power exceeds the updated initial interference tolerance, where the initial interference tolerance is related to the initial spreading factor and is smaller than the interference power detection threshold.
On the basis of the foregoing embodiment, optionally, the second adjusting unit is specifically configured to obtain a first difference between a first initial frequency point of the available frequency band and a second initial frequency point of the interference frequency band, and a second difference between a first termination frequency point of the available frequency band and a second termination frequency point of the interference frequency band; when the first difference and the second difference are both larger than or equal to the minimum channel bandwidth, dividing the available frequency band into a first target available frequency band and a second target available frequency band; wherein the range of the first target available frequency band is [ the first initial frequency point, the second initial frequency point ], and the range of the second target available frequency band is [ the second termination frequency point, the first termination frequency point ]; or, when the first difference is greater than or equal to a minimum channel bandwidth and the second difference is less than the minimum channel bandwidth, dividing the available frequency band into a third target available frequency band; wherein the range of the third target available frequency band is [ the first initial frequency point, the second initial frequency point ]; or when the first difference is smaller than the minimum channel bandwidth, dividing the available frequency band into a fourth target available frequency band; wherein the range of the fourth target available frequency band is [ the second termination frequency point, the first termination frequency point ].
On the basis of the above embodiment, optionally, the apparatus may further include: a determining module and a second adjusting module;
specifically, the determining module is configured to determine an initial spreading factor corresponding to the adjusted available frequency band;
and the second adjusting module is used for reducing the initial spreading factor corresponding to the adjusted available frequency band.
On the basis of the above embodiment, optionally, the apparatus may further include: a second obtaining module and a selecting module;
specifically, the second obtaining module is configured to obtain a minimum received power of the satellite;
the selection module is used for selecting the minimum spreading factor meeting preset conditions from a preset mapping relation table according to the available frequency band and the minimum receiving power, and determining the minimum spreading factor as the initial spreading factor corresponding to the available frequency band;
the preset condition is that the minimum receiving power is greater than or equal to a target receiving sensitivity of the satellite, the target receiving sensitivity is obtained based on the minimum spreading factor, the available frequency band and the mapping relation table, and the mapping relation table includes corresponding relations among different frequency bands, different spreading factors and receiving sensitivities of the satellite.
In one embodiment, a spread spectrum device is provided, and a schematic structural diagram thereof can be shown in fig. 5. The spread spectrum device comprises a processor and a memory which are connected through a system bus. Wherein the processor of the spread spectrum device is configured to provide computational and control capabilities. The memory of the spreading device is used for storing a computer program. The computer program is executed by a processor to implement a method of satellite spreading parameter selection.
It will be understood by those skilled in the art that the structure shown in fig. 5 is a block diagram of only a portion of the structure relevant to the present application, and does not constitute a limitation on the spreading device to which the present application is applied, and a particular spreading device may include more or less components than those shown in the figure, or combine certain components, or have a different arrangement of components.
In one embodiment, there is provided a spread spectrum device installed in a satellite, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the following steps when executing the computer program:
acquiring interference information corresponding to an available frequency band of a satellite;
adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters;
and broadcasting the target spread spectrum parameter to a terminal.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and adjusting the initial spreading factor of the available frequency band or the available frequency band according to the interference information.
In one embodiment, the processor, when executing the computer program, further performs the steps of: judging whether the interference frequency band exceeds a bandwidth threshold of the available frequency band; if yes, increasing the initial spreading factor corresponding to the available frequency band; if not, increasing an initial spreading factor corresponding to the available frequency band when the interference power is determined not to exceed the interference power detection threshold of the available frequency band; or, when it is determined that the interference power exceeds the interference power detection threshold of the available frequency band, adjusting the available frequency band; wherein the interference power detection threshold is related to the initial spreading factor.
In one embodiment, when the interference frequency band exceeds the bandwidth threshold of the available frequency band, the processor executes the computer program to further implement the following steps: and when the interference power is determined to exceed the updated initial interference tolerance, continuing to increase the adjusted initial spreading factor, wherein the initial interference tolerance is related to the initial spreading factor and is smaller than the interference power detection threshold.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring a first difference value between a first initial frequency point of the available frequency band and a second initial frequency point of the interference frequency band, and a second difference value between a first termination frequency point of the available frequency band and a second termination frequency point of the interference frequency band; when the first difference and the second difference are both larger than or equal to the minimum channel bandwidth, dividing the available frequency band into a first target available frequency band and a second target available frequency band; wherein the range of the first target available frequency band is [ the first initial frequency point, the second initial frequency point ], and the range of the second target available frequency band is [ the second termination frequency point, the first termination frequency point ]; or, when the first difference is greater than or equal to a minimum channel bandwidth and the second difference is less than the minimum channel bandwidth, dividing the available frequency band into a third target available frequency band; wherein the range of the third target available frequency band is [ the first initial frequency point, the second initial frequency point ]; or when the first difference is smaller than the minimum channel bandwidth, dividing the available frequency band into a fourth target available frequency band; wherein the range of the fourth target available frequency band is [ the second termination frequency point, the first termination frequency point ].
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining an initial spreading factor corresponding to the adjusted available frequency band; and reducing the initial spreading factor corresponding to the adjusted available frequency band.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring the minimum receiving power of a satellite; selecting a minimum spreading factor meeting a preset condition from a preset mapping relation table according to the available frequency band and the minimum receiving power, and determining the minimum spreading factor as an initial spreading factor corresponding to the available frequency band; the preset condition is that the minimum receiving power is greater than or equal to a target receiving sensitivity of the satellite, the target receiving sensitivity is obtained based on the minimum spreading factor, the available frequency band and the mapping relation table, and the mapping relation table includes corresponding relations among different frequency bands, different spreading factors and receiving sensitivities of the satellite.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring interference information corresponding to an available frequency band of a satellite;
adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters;
and broadcasting the target spread spectrum parameter to a terminal.
In one embodiment, the computer program when executed by the processor further performs the steps of: and adjusting the initial spreading factor of the available frequency band or the available frequency band according to the interference information.
In one embodiment, the computer program when executed by the processor further performs the steps of: judging whether the interference frequency band exceeds a bandwidth threshold of the available frequency band; if yes, increasing the initial spreading factor corresponding to the available frequency band; if not, increasing an initial spreading factor corresponding to the available frequency band when the interference power is determined not to exceed the interference power detection threshold of the available frequency band; or, when it is determined that the interference power exceeds the interference power detection threshold of the available frequency band, adjusting the available frequency band; wherein the interference power detection threshold is related to the initial spreading factor.
In one embodiment, the computer program when executed by the processor further performs the steps of, when the interfering frequency band exceeds the bandwidth threshold of the available frequency band: and when the interference power is determined to exceed the updated initial interference tolerance, continuing to increase the adjusted initial spreading factor, wherein the initial interference tolerance is related to the initial spreading factor and is smaller than the interference power detection threshold.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring a first difference value between a first initial frequency point of the available frequency band and a second initial frequency point of the interference frequency band, and a second difference value between a first termination frequency point of the available frequency band and a second termination frequency point of the interference frequency band; when the first difference and the second difference are both larger than or equal to the minimum channel bandwidth, dividing the available frequency band into a first target available frequency band and a second target available frequency band; wherein the range of the first target available frequency band is [ the first initial frequency point, the second initial frequency point ], and the range of the second target available frequency band is [ the second termination frequency point, the first termination frequency point ]; or, when the first difference is greater than or equal to a minimum channel bandwidth and the second difference is less than the minimum channel bandwidth, dividing the available frequency band into a third target available frequency band; wherein the range of the third target available frequency band is [ the first initial frequency point, the second initial frequency point ]; or when the first difference is smaller than the minimum channel bandwidth, dividing the available frequency band into a fourth target available frequency band; wherein the range of the fourth target available frequency band is [ the second termination frequency point, the first termination frequency point ].
In one embodiment, the computer program when executed by the processor further performs the steps of: determining an initial spreading factor corresponding to the adjusted available frequency band; and reducing the initial spreading factor corresponding to the adjusted available frequency band.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the minimum receiving power of a satellite; selecting a minimum spreading factor meeting a preset condition from a preset mapping relation table according to the available frequency band and the minimum receiving power, and determining the minimum spreading factor as an initial spreading factor corresponding to the available frequency band; the preset condition is that the minimum receiving power is greater than or equal to a target receiving sensitivity of the satellite, the target receiving sensitivity is obtained based on the minimum spreading factor, the available frequency band and the mapping relation table, and the mapping relation table includes corresponding relations among different frequency bands, different spreading factors and receiving sensitivities of the satellite.
The satellite spread spectrum parameter selection device, the spread spectrum equipment and the storage medium provided in the above embodiments can execute the satellite spread spectrum parameter selection method provided in any embodiment of the present application, and have corresponding functional modules and beneficial effects for executing the method. For technical details that are not described in detail in the above embodiments, reference may be made to a satellite spreading parameter selection method provided in any embodiment of the present application.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A method for selecting satellite spreading parameters, comprising:
acquiring interference information corresponding to an available frequency band of a satellite;
adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters;
broadcasting the target spread spectrum parameter to a terminal;
adjusting an initial spreading factor of the available frequency band or the available frequency band according to the interference information;
judging whether the interference frequency band exceeds the bandwidth threshold of the available frequency band;
if yes, increasing the initial spreading factor corresponding to the available frequency band;
if not, increasing an initial spreading factor corresponding to the available frequency band when the interference power is determined not to exceed the interference power detection threshold of the available frequency band; or, when it is determined that the interference power exceeds the interference power detection threshold of the available frequency band, adjusting the available frequency band; wherein the interference power detection threshold is related to the initial spreading factor;
acquiring a first difference value between a first initial frequency point of the available frequency band and a second initial frequency point of the interference frequency band, and a second difference value between a first termination frequency point of the available frequency band and a second termination frequency point of the interference frequency band;
when the first difference and the second difference are both larger than or equal to the minimum channel bandwidth, dividing the available frequency band into a first target available frequency band and a second target available frequency band; wherein the range of the first target available frequency band is [ the first initial frequency point, the second initial frequency point ], and the range of the second target available frequency band is [ the second termination frequency point, the first termination frequency point ]; alternatively, the first and second electrodes may be,
when the first difference is greater than or equal to a minimum channel bandwidth and the second difference is less than the minimum channel bandwidth, dividing the available frequency band into a third target available frequency band; wherein the range of the third target available frequency band is [ the first initial frequency point, the second initial frequency point ]; alternatively, the first and second electrodes may be,
when the first difference is smaller than the minimum channel bandwidth, dividing the available frequency band into a fourth target available frequency band; wherein the range of the fourth target available frequency band is [ the second termination frequency point, the first termination frequency point ].
2. The method of claim 1, wherein when the interference band exceeds a bandwidth threshold of the available band, the increasing the initial spreading factor corresponding to the available band comprises:
and when the interference power is determined to exceed the updated initial interference tolerance, continuing to increase the adjusted initial spreading factor, wherein the initial interference tolerance is related to the initial spreading factor and is smaller than the interference power detection threshold.
3. The method of claim 1, further comprising:
determining an initial spreading factor corresponding to the adjusted available frequency band;
and reducing the initial spreading factor corresponding to the adjusted available frequency band.
4. The method of claim 1, wherein the obtaining of the initial spreading factor comprises:
acquiring the minimum receiving power of a satellite;
selecting a minimum spreading factor meeting a preset condition from a preset mapping relation table according to the available frequency band and the minimum receiving power, and determining the minimum spreading factor as an initial spreading factor corresponding to the available frequency band;
the preset condition is that the minimum receiving power is greater than or equal to a target receiving sensitivity of the satellite, the target receiving sensitivity is obtained based on the minimum spreading factor, the available frequency band and the mapping relation table, and the mapping relation table includes corresponding relations among different frequency bands, different spreading factors and receiving sensitivities of the satellite.
5. A satellite spread spectrum parameter selection apparatus, comprising:
the first acquisition module is used for acquiring interference information corresponding to an available frequency band of a satellite;
the first adjusting module is used for adjusting the initial spread spectrum parameters of the available frequency band according to the interference information to obtain target spread spectrum parameters;
the broadcasting module is used for broadcasting the target spread spectrum parameter to a terminal;
adjusting an initial spreading factor of the available frequency band or the available frequency band according to the interference information;
judging whether the interference frequency band exceeds the bandwidth threshold of the available frequency band;
if yes, increasing the initial spreading factor corresponding to the available frequency band;
if not, increasing an initial spreading factor corresponding to the available frequency band when the interference power is determined not to exceed the interference power detection threshold of the available frequency band; or, when it is determined that the interference power exceeds the interference power detection threshold of the available frequency band, adjusting the available frequency band; wherein the interference power detection threshold is related to the initial spreading factor;
acquiring a first difference value between a first initial frequency point of the available frequency band and a second initial frequency point of the interference frequency band, and a second difference value between a first termination frequency point of the available frequency band and a second termination frequency point of the interference frequency band;
when the first difference and the second difference are both larger than or equal to the minimum channel bandwidth, dividing the available frequency band into a first target available frequency band and a second target available frequency band; wherein the range of the first target available frequency band is [ the first initial frequency point, the second initial frequency point ], and the range of the second target available frequency band is [ the second termination frequency point, the first termination frequency point ]; alternatively, the first and second electrodes may be,
when the first difference is greater than or equal to a minimum channel bandwidth and the second difference is less than the minimum channel bandwidth, dividing the available frequency band into a third target available frequency band; wherein the range of the third target available frequency band is [ the first initial frequency point, the second initial frequency point ]; alternatively, the first and second electrodes may be,
when the first difference is smaller than the minimum channel bandwidth, dividing the available frequency band into a fourth target available frequency band; wherein the range of the fourth target available frequency band is [ the second termination frequency point, the first termination frequency point ].
6. A spread spectrum device, installed in a satellite, comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method according to any one of claims 1 to 4.
7. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997015996A1 (en) * | 1995-10-24 | 1997-05-01 | Motorola Inc. | Method and apparatus for interference suppression in spread spectrum signals |
| CN105790823A (en) * | 2016-04-27 | 2016-07-20 | 中国人民解放军国防科学技术大学 | Micro nano satellite convenient measurement and control communication system based on civil UHF frequency band |
| CN105915264A (en) * | 2016-05-20 | 2016-08-31 | 中国电子科技集团公司第十研究所 | SMA link double spreading code signal multiplexing method |
| CN109495129A (en) * | 2018-12-28 | 2019-03-19 | 四川安迪科技实业有限公司 | A kind of spread spectrum multiple lossless switching method based on satellite communication |
-
2020
- 2020-11-09 CN CN202011239622.1A patent/CN112383323B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997015996A1 (en) * | 1995-10-24 | 1997-05-01 | Motorola Inc. | Method and apparatus for interference suppression in spread spectrum signals |
| CN105790823A (en) * | 2016-04-27 | 2016-07-20 | 中国人民解放军国防科学技术大学 | Micro nano satellite convenient measurement and control communication system based on civil UHF frequency band |
| CN105915264A (en) * | 2016-05-20 | 2016-08-31 | 中国电子科技集团公司第十研究所 | SMA link double spreading code signal multiplexing method |
| CN109495129A (en) * | 2018-12-28 | 2019-03-19 | 四川安迪科技实业有限公司 | A kind of spread spectrum multiple lossless switching method based on satellite communication |
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