Proactive Sensing and Interference Mitigation in Multi-Link Satellite Networks

Aykin, Irmak; Krunz, Marwan

doi:10.1109/glocom.2016.7842175

Cited by 6 publications

(7 citation statements)

References 12 publications

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“…MF‐TDMA sets a fixed FH pattern for each transmission and sticks to it for the rest of the operation. Although this approach tends to work well under random interference, it performs poorly in the presence of persistent interference over specific channels . In contrast, our approach allows the FH sequence to be dynamically adjusted according to channel quality and interference conditions.…”

Section: System Modelmentioning

confidence: 99%

“…Although this approach tends to work well under random interference, it performs poorly in the presence of persistent interference over specific channels. 5,7 In contrast, our approach allows the FH sequence to be dynamically adjusted according to channel quality and interference conditions. Note that we still assume that before any transmission takes place, the NCC assigns a predefined FH sequence to each LEO satellite to communicate with the GEO satellite.…”

Section: (A)mentioning

confidence: 99%

“…DFH was also used in Abdel‐Rahman et al to combat interference in a single bent‐pipe satellite link. The same approach was extended in Aykin and Krunz to multi‐link scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive frequency‐hopping schemes for CR‐based multi‐link satellite networks

Aykin

Krunz

Xiao

2018

Satell Commun Network

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Summary In this paper, we study two dynamic frequency hopping (DFH)–based interference mitigation approaches for satellite communications. These techniques exploit the sensing capabilities of a cognitive radio to predict future interference on the upcoming frequency hops. We consider a topology where multiple low Earth orbit satellites transmit packets to a common geostationary equatorial orbit satellite. The FH sequence of each low Earth orbit–geostationary equatorial orbit link is adjusted according to the outcome of out‐of‐band proactive sensing scheme, performed by a cognitive radio module in the geostationary equatorial orbit satellite. On the basis of sensing results, new frequency assignments are made for the upcoming slots, taking into account the transmit powers, achievable rates, and overhead of modifying the FH sequences. In addition, we ensure that all satellite links are assigned channels such that their minimum signal‐to‐interference‐plus‐noise ratio requirements are met, if such an assignment is possible. We formulate two multi‐objective optimization problems: DFH‐Power and DFH‐Rate. Discrete‐time Markov chain analysis is used to predict future channel conditions, where the number of states are inferred using k‐means clustering, and the state transition probabilities are computed using maximum likelihood estimation. Finally, simulation results are presented to evaluate the effects of different system parameters on the performance of the proposed designs.

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Section: System Modelmentioning

confidence: 99%

Section: (A)mentioning

confidence: 99%

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Adaptive frequency‐hopping schemes for CR‐based multi‐link satellite networks

Aykin

Krunz

Xiao

2018

Satell Commun Network

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“…Similar to the above systems, NGSO satellites of constellations and clusters will suffer the mutual interference when the NGSO satellites share the limited spectrum resource. Considering a scenario of several NGSO satellites and one receiving GSO satellite, an interference mitigation scheme based on dynamic frequency hopping was proposed to avoid interference among GSO satellites 21 . A risk assessment framework for NGSO–NGSO interference was presented by the Federal Communications Commission (FCC), in which the FCC made an analysis of co‐channel and adjacent‐channel interference among NGSO systems, and they summarized the potential schemes for NGSO–NGSO interference risk management 10 .…”

Section: Introductionmentioning

confidence: 99%

Interference management via cooperative beam biasing and power control for mmWave satellite clusters

Zhang

Cui

Li³

et al. 2021

Satell Commun Network

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Summary In order to tackle the problem of spectrum scarcity, spectrum sharing among satellite communication systems becomes a common phenomenon. Due to the spectrum sharing, mmWave satellite cluster, which is considered as a prominent part of the space information networks, may suffer severe mutual interference among inter‐satellite data links. In this paper, we firstly conduct the interference analysis for satellite clusters. Then, we formulate the interference problem as a constrained optimization problem in the performance metric of the total achievable data rate. To alleviate the interference between satellite clusters, a particle swarm optimization (PSO)‐based cooperative beam biasing and power control scheme (CBP‐PSO) from the perspectives of the joint beam domain and power domain is proposed. And the interference management problem is transformed to find the best combination of the boresight direction and transmission power based on the improved PSO algorithm. Specially, in the interference analysis and proposed scheme, different satellite cluster formations and antenna configurations are taken into account. Finally, simulation results show that the proposed CBP‐PSO scheme based on cooperative beam biasing and power control can effectively improve the achievable data rate of the interfered data links, even for the severe in‐line interference.

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“…However, the performances of these receivers are still degraded significantly because they cannot mitigate the interference in multipath channel. Moreover, in multi-user systems, especially in multi-link systems where there are multiple transceivers in [10] and [11], the receiver performances are severely affected by multi-link interference.…”

Section: Introductionmentioning

confidence: 99%

A New Multi-Link Time-Reversal Prefilter Design for Indoor Wireless Communications

2020

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A prefilter based on the time-reversal (TR) is proposed to control the multi-link interference (MLI) and the inter-symbol interference (ISI) for multi-link system. At first, we define a new parameter signal-to-sidelobe-plus-leakage ratio (SSLR) to represent the performance of the multi-link system. To improve the bit error rate (BER) performance, the proposed prefilter minimizes the MLI and the ISI and maximizes the peak power of received signal at the same time by maximization of the SSLR. We set an optimization problem to maximize the SSLR which is a quadratically constrained fractional quadratic problem. To solve the optimization problem, we use the epigraph form and the bisection method. Therefore, we find an ε-optimal solution which is a global optimal solution. Simulation results show that link interference power is reduced by the MLI-TR prefilter and the SSLR of the MLI-TR prefilter is higher than that of the conventional TR prefilter. Moreover, the BER performance of the MLI-TR prefilter is improved in overall signal-to-noise ratio range. INDEX TERMS Time-reversal prefilter, indoor radio communication, interference channels, signal processing, optimization.

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Proactive Sensing and Interference Mitigation in Multi-Link Satellite Networks

Cited by 6 publications

References 12 publications

Adaptive frequency‐hopping schemes for CR‐based multi‐link satellite networks

Adaptive frequency‐hopping schemes for CR‐based multi‐link satellite networks

Interference management via cooperative beam biasing and power control for mmWave satellite clusters

A New Multi-Link Time-Reversal Prefilter Design for Indoor Wireless Communications

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