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Ka multi-beam satellite communication system resource allocation method based on firefly algorithm

A technology of satellite communication system and firefly algorithm, applied in the field of satellite communication

Inactive Publication Date: 2018-03-30
NANJING UNIV OF SCI & TECH
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Problems solved by technology

The FDMA satellite communication system cannot do this, it can only communicate with the link under the same ground station and the link under another ground station

Method used

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  • Ka multi-beam satellite communication system resource allocation method based on firefly algorithm
  • Ka multi-beam satellite communication system resource allocation method based on firefly algorithm
  • Ka multi-beam satellite communication system resource allocation method based on firefly algorithm

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Embodiment 1

[0100] combine figure 1 , the present invention is based on the Ka multi-beam satellite communication system resource allocation optimization method of firefly algorithm, and parameters are as follows in each step:

[0101] Step 1, determine the carrier allocation status information of the link application in each beam.

[0102] frame length T frame is 110ms, the number of carriers N is 4, and the carrier symbol rate S n 64K, 2×64K, 4×64K, 8×128K, each carrier time slot length L n 10, 7, 5.5, 3, the slot header length H n is 128 symbols, the slot tail length T n is 0.1, the modulation and coding modes supported by the system are The maximum bit error rate allowed by the system is e -6 , the threshold bit signal-to-noise ratio during demodulation of the modulation coding mode 3, 4.2, 5.4, 6.5, 7.8, 9.8, the EIRP value of each ground station is 76, 68, 64, 60, 48, 43, the traffic volume of the link application obeys the exponential distribution with a mean value of 60K,...

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Abstract

The invention discloses a Ka multi-beam satellite communication system resource allocation method based on a firefly algorithm. The method includes the following steps: firstly, determining carrier allocation state information of a link application in each beam; and then dynamically adjusting a carrier coding mode of the link application by using the firefly algorithm: collecting coding parametersof the link application and determining objective function values of fireflies; determining the relative brightness and attractiveness of the fireflies in a group, and determining the location of thefirefly with the maximum objective function value; updating a control position vector of the firefly; verifying whether a newly-generated firefly position satisfies a limiting condition, if yes, entering the next step, and otherwise, returning to the previous step; repeating the operation for multiple times to obtain an optimal coding mode of an link application code; and finally, allocating thelink application to a carrier through time slot encapsulation, and completing the link application allocation in the beams. According to the scheme of the invention, the efficient allocation of multi-beam satellite system resources can be achieved according to the constraint conditions of an MF-TDMA satellite communication system from two dimensions of time slots and carriers.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, in particular to a Ka multi-beam satellite communication system resource allocation method based on firefly algorithm. Background technique [0002] In the MF-TDMA satellite communication system, the system resources to be allocated are two-dimensional frequency domain and time domain resources. NCC divides frequency domain and time domain resources in the form of carriers and time slots, and encapsulates different time slots on different carriers to different users to meet their service requirements. Compared with the one-dimensional resource allocation problem in the SCPC system, the MF-TDMA two-dimensional resource allocation strategy is more flexible, but it is this flexibility that increases the difficulty of resource allocation. In addition, compared with SCPC technology, MF-TDMA technology requires multiple carriers to be synchronized in time, which increases the complexit...

Claims

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Application Information

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IPC IPC(8): H04W52/26H04W72/04H04L1/00
CPCH04L1/0003H04W52/262H04W72/0446H04W72/0453H04W72/046H04W72/0473H04W72/52
Inventor 徐雷涂亮潘小飞张勇邹刚王恒
Owner NANJING UNIV OF SCI & TECH
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