Satellite frequency plan arrangement method

Abstract

The invention provides a satellite frequency plan arrangement method. The method comprises the following steps: acquiring beam target parameters; respectively calculating an uplink bandwidth demand and a downlink bandwidth demand corresponding to each beam; calculating a beam uplink allocation bandwidth combination and a beam downlink allocation bandwidth combination; determining an uplink allocation bandwidth and a downlink allocation bandwidth corresponding to each beam; performing letter coding on the uplink and downlink selectable frequency bands of each wave beam according to a preset coding rule; constructing a beam uplink topological matrix and a beam downlink topological matrix; wherein elements in the matrix are respectively used for representing an uplink topological relation and a downlink topological relation between beams; sequentially allocating corresponding uplink frequency bands and downlink frequency bands to the beams; and performing reverse decoding on the frequency band codes of the allocated uplink frequency band and the downlink frequency band based on a preset coding rule to obtain a corresponding uplink real frequency band and a corresponding downlink real frequency band. Thus, the user demand matching rate is improved, the user service quality is guaranteed, and meanwhile the better satellite resource utilization rate is achieved.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication technology, and in particular to a satellite frequency plan arrangement method. Background Art

[0002] Frequency resources are one of the most valuable resources on board. Their planning and management is a key issue in the design and on-orbit application of multi-beam satellites. The application scenarios of frequency planning are reflected in two aspects.

[0003] First, during the multi-beam satellite design phase, the frequency plan arrangement determines the core performance indicators of the satellite system, such as carrier-to-interference ratio and effective capacity. In addition, it also affects the number of payload system channels, the type and number of active / passive units, etc., which in turn affects the system weight, power consumption, and heat consumption.

[0004] Secondly, during the on-orbit application phase of multi-beam satellites, due to the continuous diversification of user needs and the dynamic changes in time and space throughout the life cycle, a frequency plan arrangement scheme that better matches user needs must be dynamically generated (determined by the granularity of the adjustment cycle) and uploaded to the onboard payload. Otherwise, it will lead to "uneven busy and idle" satellite resources, affecting satellite resource utilization and user service quality.

[0005] Traditional multi-beam satellite frequency planning arrangements mostly adopt a uniform multi-color frequency reuse strategy, and the determination of whether the beams can be co-frequency depends entirely on the spatial distance. Therefore, the existing methods have two important defects:

[0006] (1) Poor versatility. It is only applicable to scenarios where user demands are balanced and bandwidth demands are uniform between beams. However, in actual scenarios, user demands generally vary with geographical locations, and flexible bandwidth allocation is mostly required between beams.

[0007] (2) Relying only on spatial distance to determine whether the beams are co-frequency ignores the contour characteristics of the actual radiation pattern. In other words, the contour of the beam pattern is irregular, and the interference between a group of beams with a longer spatial distance is not necessarily less than that between another group of beams with a closer spatial distance.

[0008] Therefore, there is an urgent need for a method that can effectively solve the above-mentioned prior art problems. Summary of the invention

[0009] The purpose of the present invention is to provide a satellite frequency plan arrangement method, which can improve the user demand matching rate, ensure the user service quality, and achieve better satellite resource utilization in scenarios with flexible bandwidth requirements and strict carrier-to-interference ratio requirements.

[0010] In order to achieve the above object, the present invention provides a satellite frequency plan arrangement method, comprising the steps of:

[0011] Obtaining beam target parameters; wherein the beam target parameters include the number of beams, the downlink capacity requirement of each beam, the uplink capacity requirement of each beam, the downlink available frequency band, the uplink available frequency band, the carrier-to-interference ratio index, the downlink gain contour line set of each beam, and the uplink gain contour line set of each beam;

[0012] According to the uplink capacity requirement and the downlink capacity requirement, respectively calculating the uplink bandwidth requirement and the downlink bandwidth requirement corresponding to each beam;

[0013] Calculating a beam uplink allocated bandwidth combination according to the uplink bandwidth requirement and the uplink available frequency band, and calculating a beam downlink allocated bandwidth combination according to the downlink bandwidth requirement and the downlink available frequency band;

[0014] Based on the uplink bandwidth requirement and the downlink bandwidth requirement, determine the uplink allocated bandwidth and the downlink allocated bandwidth corresponding to each beam from the beam uplink allocated bandwidth combination and the beam downlink bandwidth combination respectively;

[0015] According to the preset coding rules, the uplink and downlink selectable frequency bands of each beam are coded with letters;

[0016] Constructing a beam uplink topology matrix and a beam downlink topology matrix for representing the topological relationship between beams; wherein the elements in the beam uplink topology matrix and the beam downlink topology matrix are 0 and 1, 0 indicates that the two relative beams are not adjacent or do not meet the preset conditions, and 1 indicates that the two relative beams meet the preset conditions, and the preset conditions are min(-3-x, -3-y)<η+2, wherein x is the contour line tangent to the -3dB contour line of beam a and beam b, y is the contour line tangent to the -3dB contour line of beam b and beam a, and η is the carrier-to-interference ratio indicator;

[0017] Based on the uplink topology matrix and the downlink topology matrix, sequentially allocating corresponding uplink frequency bands and downlink frequency bands to each beam by ensuring that the frequency band codes between the beams to be allocated whose element values ​​are 1 are not equal and do not contain each other;

[0018] The frequency band codes of the allocated uplink frequency band and the downlink frequency band are reversely decoded based on the preset coding rule to obtain a corresponding uplink real frequency band and a downlink real frequency band.

[0019] Furthermore, the uplink bandwidth requirement is calculated based on the following formula:

[0020] The downstream bandwidth requirement is calculated based on the following formula:

[0021] Where i is the beam index, i∈{1,2,…,m}, Ui is the uplink capacity requirement, D i is the downlink capacity requirement.

[0022] Further, the calculating the beam downlink allocation bandwidth combination according to the downlink bandwidth requirement and the downlink available frequency band includes:

[0023] According to the downlink bandwidth requirement and the downlink available frequency band, the formula Calculate the number of frequency blocks; wherein the downlink available frequency band is [d1, d2];

[0024] According to the number of frequency blocks, the first-level bandwidth is calculated by formula B1=(d2-d1) / c; and by formula B k =B k-1 / 2, calculate the bandwidth of each level until the p-th level bandwidth p is an integer greater than or equal to 2;

[0025] A beam downlink allocation bandwidth combination consisting of the bandwidths of each level is generated.

[0026] Further, the calculating the beam uplink allocation bandwidth combination according to the uplink bandwidth requirement and the uplink available frequency band includes:

[0027] According to the uplink bandwidth requirement and the uplink available frequency band, the formula Calculate the number of frequency blocks; wherein the uplink available frequency band is [u1, u2];

[0028] According to the number of frequency blocks, the first-level bandwidth is calculated by formula B1′=(u2-u1) / c′; and by formula B k ′=B k-1 ′ / 2, calculate the bandwidth of each level until the qth level bandwidth q is an integer greater than or equal to 2;

[0029] A beam uplink allocation bandwidth combination consisting of the bandwidths of each level is generated.

[0030] Furthermore, the preset coding rule of the downlink selectable frequency band is:

[0031] The left polarization frequency band of the first level bandwidth d1+(c-1)×B1~d2 is coded as F c , the right polarization frequency band d1+(c-1)×B1~d2 is encoded as -F c , where c is the number of frequency blocks, the downlink available frequency band is [d1, d2]; the left polarization frequency band of the second-level bandwidth d1+(c-1)×B1~d1+(c-1)×B1+B2 is encoded as F c_A, right polarization frequency band d1+(c-1)×B1~d1+(c-1)×B1+B2 is encoded as -F c _A, left polarization frequency band d1+(c-1)×B1+B2~d2 is coded as F c _B, right polarization frequency band d1+(c-1)×B1+B2~d2 is encoded as -F c _B; Similarly, the left polarization frequency band of the p-th level bandwidth is coded as F c _(z), the right polarization frequency band of the p-th bandwidth is coded as -F c _(z), where (z) = z1_..._z p , z p is the letter A or the letter B;

[0032] And the uplink selectable frequency band has the same preset coding rule as the downlink selectable frequency band.

[0033] The satellite frequency plan arrangement method of the present invention can be applied to scenarios involving multiple bandwidth requirements in multi-beam satellite systems, and the bandwidth allocation is more flexible. In addition, the co-frequency relationship between beams can be determined by simply observing whether the letter codes are equal or contain each other, which is more convenient for designers to manually review the frequency plan arrangement scheme; the present invention also quantifies the true isolation between beams through actual gain contours, and judges beams with isolation less than the carrier-to-interference ratio threshold plus 2dB as adjacent, and cannot be allocated the same frequency band. Compared with the method of judging proximity by beam spacing, the method takes into account the actual characteristics of the antenna, and the result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flowchart showing the steps of the satellite frequency plan arrangement method provided by one embodiment of the present invention is shown;

[0035] Figure 2 A schematic diagram showing a set of downlink gain contour lines of a beam in a specific application example of the satellite frequency plan arrangement method provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram showing the allocation of downlink frequencies to each beam in a specific application example of the satellite frequency plan arrangement method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] It should be noted that references to "one embodiment", "embodiment", "example embodiment", etc. in this specification refer to the embodiment described, which may include specific features, structures or characteristics, but not every embodiment must include these specific features, structures or characteristics. In addition, such expressions do not refer to the same embodiment. Furthermore, when describing specific features, structures or characteristics in conjunction with an embodiment, whether or not there is an explicit description, it has been shown that it is within the knowledge of those skilled in the art to combine such features, structures or characteristics into other embodiments.

[0039] In addition, certain words are used in the specification and subsequent claims to refer to specific components or parts. Those with ordinary knowledge in the relevant field should understand that manufacturers can use different nouns or terms to refer to the same component or part. This specification and subsequent claims do not use differences in names as a way to distinguish components or parts, but use differences in the functions of components or parts as the criteria for distinction. "Including" and "including" mentioned throughout the specification and subsequent claims are open-ended terms and should be interpreted as "including but not limited to". In addition, the word "connected" here includes any direct and indirect electrical connection means. Indirect electrical connection means include connection through other devices.

[0040] The present invention provides a satellite frequency plan arrangement method, which utilizes the letter coding method for selectable frequency bands and the carrier-to-interference ratio guarantee method based on isolation constraints to improve the user demand matching rate, ensure the user service quality, and achieve better satellite resource utilization.

[0041] Figure 1 A satellite frequency plan arrangement method provided by an embodiment of the present invention is shown, comprising the following steps:

[0042] S101: Obtain beam target parameters; wherein the beam target parameters include the number of beams, the downlink capacity requirement of each beam, the uplink capacity requirement of each beam, the downlink available frequency band, the uplink available frequency band, the carrier-to-interference ratio index, the downlink gain contour set of each beam, and the uplink gain contour set of each beam; step S101 is an initialization input, and the target parameters of each beam can be obtained by manual input, such as manually inputting the number of beams m, where m is a positive integer; manually inputting the downlink capacity requirement D of each beam i , D i is a positive number in Mbps, i∈{1,2,…,m}; manually input the uplink capacity requirement U of each beam i , U iis a positive number in Mbps, i∈{1,2,…,m}; manually input the available downlink frequency band [d1, d2], d1, d2 are positive numbers in MHz and d2 is greater than d1; manually input the available uplink frequency band [u1, u2], u1, u2 are positive numbers in MHz and u2 is greater than u1; manually input the carrier-to-interference ratio index η, η is a positive number in dB; manually input the downlink gain contour set V of each beam i ,i∈{1,2,…,m};Manually input the uplink gain contour set W of each beam i , i∈{1,2,…,m}.

[0043] In a specific application example, taking the beam downlink as an example, the manually input number of beams m=16, the downlink capacity requirements of each beam are 482Mbps, 985Mbps, 476Mbps, 261Mbps, 502Mbps, 263Mbps, 252Mbps, 492Mbps, 514Mbps, 265Mbps, 483Mbps, 515Mbps, 1004Mbps, 479Mbps, 260Mbps, 986Mbps; the downlink available frequency band is [19200MHz, 20200MHz]; the carrier-to-interference ratio index η is 12dB, and the downlink gain contour line set of each beam, taking beam 1 as an example, is as follows: Figure 2 shown.

[0044] S102: Calculate the uplink bandwidth requirement and the downlink bandwidth requirement corresponding to each beam according to the uplink capacity requirement and the downlink capacity requirement.

[0045] In specific implementation, the uplink bandwidth requirement is calculated based on the following formula:

[0046] The downstream bandwidth requirement is calculated based on the following formula:

[0047] Where i is the beam index, i∈{1,2,…,m}, U i is the uplink capacity requirement, D i is the downlink capacity requirement.

[0048] Combined with the above example, substitute the downlink capacity requirement of 16 beams into the above It can be calculated that the downlink bandwidth requirements of each beam are: 241MHz, 492.5MHz, 238MHz, 130.5MHz, 251MHz, 131.5MHz, 126MHz, 246MHz, 257MHz, 132.5MHz, 241.5MHz, 257.5MHz, 502MHz, 239.5MHz, 130MHz, and 493MHz; of course, the uplink bandwidth requirements of each beam are calculated based on the same method.

[0049] S103: Calculate a beam uplink allocation bandwidth combination according to the uplink bandwidth requirement and the uplink available frequency band, and calculate a beam downlink allocation bandwidth combination according to the downlink bandwidth requirement and the downlink available frequency band.

[0050] In a specific implementation, the calculating of the beam downlink allocation bandwidth combination according to the downlink bandwidth requirement and the downlink available frequency band includes:

[0051] According to the downlink bandwidth requirement and the available downlink frequency band, the formula The number of frequency blocks is calculated; wherein the available downlink frequency band is [d1, d2]; in the calculation formula of the number of frequency blocks, max represents a maximum value operation, and [] represents a rounding operation;

[0052] According to the number of frequency blocks, the first-level bandwidth is calculated by formula B1=(d2-d1) / c; and by formula B k =B k-1 / 2, calculate the bandwidth of each level until the p-th level bandwidth p is an integer greater than or equal to 2; that is:

[0053] First level bandwidth B1 = (d2-d1) / c;

[0054] The second level bandwidth B2 = B1 / 2;

[0055] The third level bandwidth B3 = B2 / 2;

[0056] And so on, until the p-th level bandwidth p is an integer greater than or equal to 2;

[0057] Generate a beam downlink allocation bandwidth combination consisting of each level of bandwidth, assuming that the beam downlink allocation bandwidth combination is G, then G = {B1, B2, ..., B p}.

[0058] The calculating, according to the uplink bandwidth requirement and the uplink available frequency band, a beam uplink allocation bandwidth combination comprises:

[0059] According to the uplink bandwidth requirement and the uplink available frequency band, the formula Calculate the number of frequency blocks; wherein the uplink available frequency band is [u1, u2];

[0060] According to the number of frequency blocks, the first-level bandwidth is calculated by formula B1′=(u2-u1) / c′; and by formula B k ′=B k-1 ′ / 2, calculate the bandwidth of each level until the qth level bandwidth q is an integer greater than or equal to 2;

[0061] Generate a beam uplink allocation bandwidth combination consisting of bandwidths at each level. The generation method of the beam uplink allocation bandwidth combination is the same as the generation method of the beam downlink allocation bandwidth combination described above, which will not be repeated here.

[0062] In combination with the above-mentioned specific application example, it can be calculated that the beam downlink allocation bandwidth combination G is {500MHz, 250MHz, 125MHz}.

[0063] S104: Based on the uplink bandwidth requirement and the downlink bandwidth requirement, determine the uplink allocated bandwidth and the downlink allocated bandwidth corresponding to each beam from the beam uplink allocated bandwidth combination and the beam downlink bandwidth combination. Specifically, analyze the element value closest to the uplink bandwidth requirement and the downlink bandwidth requirement from the beam uplink allocated bandwidth combination and the beam downlink allocated bandwidth combination, and use them as the uplink allocated bandwidth and the downlink allocated bandwidth respectively; for example, calculate the downlink allocated bandwidth of each beam When the downlink bandwidth requirement is closest to the downlink bandwidth requirement, the downlink bandwidth allocation combination G is selected. The element value of , i is the beam index, i∈{1,2,…,m}.

[0064] Based on the above specific application examples, it can be calculated that the downlink allocated bandwidth of each beam is 250MHz, 500MHz, 250MHz, 125MHz, 250MHz, 125MHz, 125MHz, 250MHz, 250MHz, 125MHz, 250MHz, 250MHz, 500MHz, 250MHz, 125MHz, and 500MHz respectively.

[0065] S105: performing letter coding for the uplink and downlink selectable frequency bands of each beam according to a preset coding rule.

[0066] Preferably, a preset coding rule of the downlink selectable frequency band in this embodiment is:

[0067] The left polarization frequency band of the first level bandwidth d1+(c-1)×B1~d2 is coded as F c , the right polarization frequency band d1+(c-1)×B1~d2 is encoded as -F c, where c is the number of frequency blocks, the downlink available frequency band is [d1, d2]; the left polarization frequency band of the second-level bandwidth d1+(c-1)×B1~d1+(c-1)×B1+B2 is encoded as F c _A, right polarization frequency band d1+(c-1)×B1~d1+(c-1)×B1+B2 is encoded as -F c _A, left polarization frequency band d1+(c-1)×B1+B2~d2 is coded as F c _B, right polarization frequency band d1+(c-1)×B1+B2~d2 is encoded as -F c _B; Similarly, the left polarization frequency band of the p-th level bandwidth is coded as F c _(z), the right polarization frequency band of the p-th bandwidth is coded as -F c _(z), where (z) = z1_..._z p , z p is the letter A or the letter B;

[0068] In specific implementation, the frequency band coding corresponding to the first-level bandwidth of this embodiment is: the left polarization frequency band d1~d1+B1 is coded as F1, and the right polarization frequency band d1~d1+B1 is coded as -F1; the left polarization frequency band d1+B1~d1+2B1 is coded as F2, and the right polarization frequency band d1+B1~d1+2B1 is coded as -F2; and so on, the left polarization frequency band d1+(c-1)×B1~d2 is coded as F c , the right polarization frequency band d1+(c-1)×B1~d2 is encoded as -F, where c is the number of frequency blocks.

[0069] The frequency band coding corresponding to the second-level bandwidth is as follows: the left polarization frequency band d1~d1+B2 is coded as F1_A, and the right polarization frequency band d1~d1+B2 is coded as -F1_A; the left polarization frequency band d1+B2~d1+B1 is coded as F1_B, and the right polarization frequency band d1+B2~d1+B1 is coded as -F1_B; and so on, the left polarization frequency band d1+(c-1)×B1~d1+(c-1)×B1+B2 is coded as F c _A, right polarization frequency band d1+(c-1)×B1~d1+(c-1)×B1+B2 is encoded as -F c _A, left polarization frequency band d1+(c-1)×B1+B2~d2 is coded as F c _B, right polarization frequency band d1+(c-1)×B1+B2~d2 is encoded as -F c _B.

[0070] By analogy, the frequency band codes corresponding to the third-level bandwidth are: F1_A_A, -F1_A_A, F1_A_B, -F1_A_B, F1_B_A, -F1_B_A, F1_B_B, -F1_B_B, ..., F c_A_A, -F c _A_A, F c _A_B, -F c _A_B, F c _B_A, -F c _B_A, F c _B_B, -F c _B_B.

[0071] And so on, until the frequency band encoding corresponding to the p-th level bandwidth is completed.

[0072] In combination with the above-mentioned specific application examples, the letter codes of the selectable downlink frequency bands are shown in the following Table 1;

[0073] Table 1:

[0074]

[0075]

[0076] Correspondingly, the uplink selectable frequency band has the same preset coding rule as the downlink selectable frequency band, which will not be described in detail here.

[0077] Of course, in other examples, similar coding rules may be used to perform letter coding on the uplink and downlink selectable frequency bands. As long as the coding rules can be used to distinguish the various parts of the frequency bands at various levels of bandwidth in the frequency band, they can be applied to the method of the present invention.

[0078] S106: Construct a beam uplink topology matrix and a beam downlink topology matrix for representing the topological relationship between beams; wherein the elements in the beam uplink topology matrix and the beam downlink topology matrix are 0 and 1, 0 indicates that the two relative beams are not adjacent or do not meet the preset conditions, and 1 indicates that the two relative beams meet the preset conditions, and the preset conditions are min(-3-x, -3-y)<η+2, wherein x is the contour line tangent to the -3dB contour line of beam a and beam b, y is the contour line tangent to the -3dB contour line of beam b and beam a, and η is the carrier-to-interference ratio indicator.

[0079] Taking the beam downlink topology matrix I as an example, the matrix I has a dimension of m×m and is a diagonal matrix, where the element value I in the ath row and the bth column is ab Equal to the value of the element I in the bth row and ath column ba , represents the downlink topological relationship between beam a and beam b;

[0080] I ab The value is 0 and 1, and the calculation method is as follows:

[0081] If beam a is not adjacent to beam b, then I ab =0; otherwise:

[0082] According to the downlink gain contour set V of each beam i Find the contour line that is tangent to the -3dB contour line of beam a and beam b, denoted as xdB, x∈{-3,-4,…,-30};

[0083] Use the same method to find the contour line of beam b that is tangent to the -3dB contour line of beam a, denoted as ydB, y∈{-3,-4,…,-30};

[0084] Then make a judgment based on x and y:

[0085] If min(-3-x, -3-y)<η+2, then I ab =1; if min(-3-x, -3-y)≥η+2, then I ab =0; where min represents the minimum value operation.

[0086] Combined with the above specific application example, the calculated beam downlink topology matrix is:

[0087]

[0088] The beam uplink topology matrix of this embodiment is also obtained in the same manner as above.

[0089] S107: Based on the uplink topology matrix and the downlink topology matrix, the corresponding uplink frequency band and downlink frequency band are allocated to each beam in turn by ensuring that the frequency band codes between the beams to be allocated with the element value of 1 are not equal and do not contain each other; in specific implementation, in step S107, a frequency band code is allocated to each beam to ensure that the frequency band codes between the beams with the topological relationship equal to 1 are not equal and do not contain each other. Specifically, equal frequency band codes refer to that the frequency band codes are completely consistent; frequency band code S includes frequency band code T, which means that S is any text connected to T. In the specific application example of this embodiment, the downlink frequency allocated to each beam in turn is as follows: Figure 3 The uplink frequency allocated to each beam is allocated in the same way as the downlink frequency.

[0090] S108: The frequency band codes of the allocated uplink frequency band and downlink frequency band are reversely decoded based on the preset coding rule to obtain the corresponding uplink real frequency band and downlink real frequency band. That is, the downlink frequency band codes of each beam are decoded to obtain the downlink real frequency band and polarization, and the uplink frequency band codes of each beam are decoded to obtain the uplink real frequency band and polarization as the final frequency plan arrangement scheme. The specific decoding process is the inverse process of step S105.

[0091] In combination with the above-mentioned specific application examples, the downlink frequency band coding of each beam is decoded to obtain the downlink real frequency band and polarization as the final downlink frequency plan arrangement scheme, as shown in the downlink frequency plan arrangement scheme of Table 2;

[0092] Table 2:

[0093]

[0094]

[0095] In this way, this embodiment takes into account the actual antenna gain contours under various bandwidth allocation types, and at the same time facilitates designers to intuitively observe the co-channel interference of beams.

[0096] In summary, the satellite frequency plan arrangement method described in the present invention can be applied to scenarios involving multiple bandwidth requirements in multi-beam satellite systems, and bandwidth allocation is more flexible. In addition, the co-frequency relationship between beams can be determined by simply observing whether the letter codes are equal or contain each other, which makes it easier for designers to manually review the frequency plan arrangement scheme. The present invention also quantifies the true isolation between beams through actual gain contours, and judges beams with isolation less than the carrier-to-noise ratio threshold plus 2dB as adjacent, and cannot be allocated the same frequency band. Compared with the method of judging proximity by beam spacing, the method takes into account the true characteristics of the antenna, and the result is more accurate.

[0097] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A satellite frequency planning method, characterized in that: Includes steps: Obtaining beam target parameters; wherein the beam target parameters include the number of beams, the downlink capacity requirement of each beam, the uplink capacity requirement of each beam, the downlink available frequency band, the uplink available frequency band, the carrier-to-interference ratio index, the downlink gain contour line set of each beam, and the uplink gain contour line set of each beam; According to the uplink capacity requirement and the downlink capacity requirement, respectively calculating the uplink bandwidth requirement and the downlink bandwidth requirement corresponding to each beam; Calculating a beam uplink allocated bandwidth combination according to the uplink bandwidth requirement and the uplink available frequency band, and calculating a beam downlink allocated bandwidth combination according to the downlink bandwidth requirement and the downlink available frequency band; Based on the uplink bandwidth requirement and the downlink bandwidth requirement, determine the uplink allocated bandwidth and the downlink allocated bandwidth corresponding to each beam from the beam uplink allocated bandwidth combination and the beam downlink bandwidth combination respectively; According to the preset coding rules, the uplink and downlink selectable frequency bands of each beam are coded with letters; Constructing a beam uplink topology matrix and a beam downlink topology matrix for representing the topological relationship between beams; wherein the elements in the beam uplink topology matrix and the beam downlink topology matrix are 0 and 1, 0 indicates that the two relative beams are not adjacent or do not meet the preset conditions, and 1 indicates that the two relative beams meet the preset conditions, and the preset conditions are min(-3-x, -3-y)<η+2, wherein x is the contour line tangent to the -3dB contour line of beam a and beam b, y is the contour line tangent to the -3dB contour line of beam b and beam a, and η is the carrier-to-interference ratio indicator; Based on the uplink topology matrix and the downlink topology matrix, sequentially allocating corresponding uplink frequency bands and downlink frequency bands to each beam by ensuring that the frequency band codes between the beams to be allocated whose element values ​​are 1 are not equal and do not contain each other; The frequency band codes of the allocated uplink frequency band and the downlink frequency band are reversely decoded based on the preset coding rule to obtain a corresponding uplink real frequency band and a downlink real frequency band.

2. The satellite frequency plan arrangement method according to claim 1, characterized in that: The uplink bandwidth requirement is calculated based on the following formula: The downstream bandwidth requirement is calculated based on the following formula: Where i is the beam index, i∈{1,2,…,m}, U i is the uplink capacity requirement, D i is the downlink capacity requirement.

3. The satellite frequency plan arrangement method according to claim 2, characterized in that: The calculating, according to the downlink bandwidth requirement and the downlink available frequency band, a beam downlink allocated bandwidth combination comprises: According to the downlink bandwidth requirement and the downlink available frequency band, the formula Calculate the number of frequency blocks; wherein the downlink available frequency band is [d1, d2]; According to the number of frequency blocks, the first-level bandwidth is calculated by formula B1=(d2-d1) / c; and by formula B k =B k-1 / 2, calculate the bandwidth of each level until the p-th level bandwidth p is an integer greater than or equal to 2; A beam downlink allocation bandwidth combination consisting of the bandwidths of each level is generated.

4. The satellite frequency plan arrangement method according to claim 2, characterized in that: The calculating, according to the uplink bandwidth requirement and the uplink available frequency band, a beam uplink allocated bandwidth combination comprises: According to the uplink bandwidth requirement and the uplink available frequency band, the formula Calculate the number of frequency blocks; wherein the uplink available frequency band is [u1, u2]; According to the number of frequency blocks, the first-level bandwidth is calculated by formula B1′=(u2-u1) / c′; and by formula B k ′=B k-1 ′ / 2, calculate the bandwidth of each level until the qth level bandwidth q is an integer greater than or equal to 2; A beam uplink allocation bandwidth combination consisting of the bandwidths of each level is generated.

5. The satellite frequency plan arrangement method according to claim 1, characterized in that: The preset coding rule of the downlink selectable frequency band is: The left polarization frequency band of the first level bandwidth d1+(c-1)×B1~d2 is coded as F c , the right polarization frequency band d1+(c-1)×B1~d2 is encoded as -F c , where c is the number of frequency blocks, and the downlink available frequency band is [d1, d2]; The left polarization frequency band of the second-level bandwidth d1+(c-1)×B1~d1+(c-1)×B1+B2 is coded as F c _A, right polarization frequency band d1+(c-1)×B1~d1+(c-1)×B1+B2 is encoded as -F c _A, left polarization frequency band d1+(c-1)×B1+B2~d2 is coded as F c _B, right polarization frequency band d1+(c-1)×B1+B2~d2 is encoded as -F c _B; Similarly, the left polarization frequency band of the p-th level bandwidth is coded as F c _(z), the right polarization frequency band of the p-th bandwidth is coded as -F c _(z), where (z) = z1_..._z p , z p is the letter A or the letter B; And the uplink selectable frequency band has the same preset coding rule as the downlink selectable frequency band.

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