Angle Partition-Based TDMA for VDES Satellite Multiuser Downlink Communications

Zheng, Beixiong; Yang, Kai; Peng, Xiaoming; Zhang, Rui

doi:10.1109/globecom42002.2020.9322170

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…Only when more than one path with the same distance is founded during traversal, backtracking is performed to compare the number of nodes that pass through and select the path with fewer nodes. However, this situation is very rare and can almost be ignored [18,19].…”

Section: Algorithm Complexity Analysismentioning

confidence: 99%

Research on Routing Equalization Algorithm of Inter-Satellite Partition for Low-Orbit Micro-Satellites

Cheng

Guo

et al. 2022

Future Internet

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Low-orbit micro-satellite technology has developed rapidly in recent years due to its advantages of low time delay, low cost and short research period. However, among the existing inter-satellite routing algorithms, the classical flooding and greedy algorithms and their derivatives also have some limitations. The path delay calculated by the flooding algorithm is small but the calculation is large, while the greedy algorithm is the opposite. In this paper, a balanced inter-satellite routing algorithm based on partition routing is proposed. This paper presents the simulation experiments for the following indexes of the classic inter-satellite routing algorithms and the balanced partition routing algorithm: computation complexity, single-node computation pressure, routing path delay, path delay variance (data in Topo table satisfy μ =5, σ2=10). The results reveal that the balanced partition routing algorithm achieves better performance. In this paper, two optimization directions of the balanced partition routing algorithm are simulated under conditions that the data in the Topo table satisfy μ =5, σ2= 6, σ2=10 and σ2=15, respectively, when comparing their performance indicators. The experiments show that these two optimization methods can be adapted to various application scenarios and can further reduce the hardware cost of satellite nodes.

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Section: Algorithm Complexity Analysismentioning

confidence: 99%

Research on Routing Equalization Algorithm of Inter-Satellite Partition for Low-Orbit Micro-Satellites

Cheng

Guo

et al. 2022

Future Internet

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“…TDMA has the advantages of large communication capacity, high frequency efficiency and compatibility between prime station and slave station. It has been widely used in various civil and military communication systems, such as very small aperture terminal (VSAT) satellite systems, international maritime satellite systems, iridium satellite systems and unmanned aerial vehicle communication systems [1][2][3][4]. TDMA signal usually has the characteristics of burst and transient.…”

Section: Introductionmentioning

confidence: 99%

Robust Burst Detection Algorithm for Distributed Unique Word TDMA Signal

et al. 2021

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In recent years, distributed unique word (DUW) has been widely used in satellite single carrier TDMA signals, such as very small aperture terminal (VSAT) satellite systems. Different from the centralized structure of traditional unique word, DUW is uniformly dispersed in a burst signal, where the traditional unique word detection methods are not applicable anymore. For this, we propose a robust burst detection algorithm based on DUW. Firstly, we allocated the sliding detection windows with the same structures as DUW in order to effectively detect it. Secondly, we adopt the method of time delay conjugate multiplication to eliminate the influence of frequency offset on detection performance. Due to the uniform dispersion of DUW, it naturally has two different kinds of time delays, namely the delay within the group and the delay between the two groups. So, we divide the traditional dual correlation formula into two parts to calculate them separately and obtain a dual correlation detection algorithm, which is suitable for DUW. Simulation and experimental results demonstrate that when the distribution structure of DUW changes, detection probability of the proposed algorithm fluctuates little, and its variance is 1.56×10−5, which is 99.83% lower than the existing DUW detection algorithms. In addition, its signal to noise ratio (SNR) threshold is about 1 dB lower than the existing algorithms under the same circumstance of the missed detection probability.

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