Smart Diversity Through MIMO Satellite $Q/V$-Band Feeder Links

Delamotte, Thomas; Knopp, Andreas

doi:10.1109/taes.2019.2914535

Cited by 21 publications

(11 citation statements)

References 32 publications

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“…Finally, P N out = P sys out (L, N ) = P(S N ≥ L) and P N ∪K out = P sys out (L , N + K) = P(S N ∪K ≥ L ) stand for the SOP of the N -GW and (N + K)-GW diversity systems, respectively. Now, by virtue of the law/theorem of total probability, we get: (10) As a result, P N ∪K out ≤ P N out . In view of this fact, we can generalize the notion of SOP-improvement factor.…”

Section: Sop-improvement Factormentioning

confidence: 98%

“…Specifically, in nominal clear-sky conditions all GWs are active and operate using a maximum fraction of their full capacity, while if some GWs experience heavy rain attenuation then their traffic is served by the remaining GWs using their extra capacity. Finally, an extension of the well-known N -active and N + P diversity schemes to multiple-inputmultiple-output (MIMO) architectures is presented in [10].…”

Section: A Related Workmentioning

confidence: 99%

See 1 more Smart Citation

On the Computation and Approximation of Outage Probability in Satellite Networks with Smart Gateway Diversity

Efrem,

Panagopoulos

2020

Preprint

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The utilization of extremely high frequency (EHF) bands can achieve very high throughput in satellite networks (SatNets). Nevertheless, the severe rain attenuation at EHF bands imposes strict limitations on the system availability. Smart gateway diversity (SGD) is considered indispensable in order to guarantee the required availability with reasonable cost. In this context, we propose and examine a new SGD architecture, namely, load-sharing SGD (LS-SGD). For this diversity scheme, we define the system outage probability (SOP) using a rigorous probabilistic analysis based on the Poisson binomial distribution (PBD), and taking into consideration the traffic demand as well as the gateway (GW) capacity. Furthermore, we provide several methods for the exact and approximate calculation of SOP. As concerns the exact computation of SOP, a closed-form expression and an efficient algorithm based on a recursive formula are given, both with quadratic worst-case complexity in the number of GWs. Finally, the proposed approximation methods include probability-distribution approximations and Chernoff bounds.

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Section: Sop-improvement Factormentioning

confidence: 98%

Section: A Related Workmentioning

confidence: 99%

On the Computation and Approximation of Outage Probability in Satellite Networks with Smart Gateway Diversity

Efrem,

Panagopoulos

2020

Preprint

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“…The development of such systems is a burdensome and costly task. Recent works proposed multiple-input multiple-output (MIMO) feeder links as a candidate to overcome several implementation bottlenecks that multiple-gateway architectures face 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Time and Phase Alignment of Distributed Gateways: Theoretical Analysis and Experimental Demonstration

Mollaymeri

Delamotte

Knopp

2022

Preprint

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Very high throughput satellite systems have recently been developed to offer high-speed connectivity, especially in remote areas, planes and ships. The high data rates can be achieved by using a multibeam approach with an aggressive reuse of the available frequency resources. Due to the high number of user beams, the system must support a large aggregated bandwidth. Multiple-gateway architectures are a necessary solution to sustain the immense bandwidth requirements. Multiple-input multiple-output (MIMO) feeder links have been proposed to address the ground segment design challenges of multiple-gateway architectures. The deployment costs and the link availability performance can in particular benefit from this approach. However, to coordinate the operation of multiple gateways, high precision time and phase synchronization is necessary. In this paper, the effect of time and phase misalignment in MIMO feeder links is studied. Mathematical models that describe the performance limitation due to imperfect time and phase distribution for a 2x2 MIMO feeder link are introduced. Time and phase dissemination via optical fiber is considered for the synchronization of the ground stations. The ability of such systems for time distribution was tested through experiments. The bandwidth that can be supported is evaluated based on the measured residual timing error. Results showed that the achieved synchronization supports channel bandwidths of several GHz. On the other hand, a recently proposed phase synchronization approach is considered as a promising candidate for MIMO feeder links. Its phase stability performance is assessed and it is emphasized that requirements in terms of link outage are fulfilled.

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“…In this paper, a 0.15 µm pHEMT process is used to design a reception examines selection respecting the Access Networks design procedures for the Section III. The system high teledensity and interference contributions constraints; consumption [10], [11]. Specifically, the X is for space research, deep space operations, and environmental and military communica This paper examines the relationship between the mm wave receiver sensitivity and the noise floor over the X band for Fiber Architecture Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Data communication reliability is a function of the subsystems' adaptation stochastic nature of the channel. Consequently, the space and the terrestrial environments are different and both pose peculiar data transmission challenges proposed reconfigurable ubiquitous seamless [3] requires a base station The system-level design high teledensity and interference contributions constraints; requirement; and sensitivities [10], [11]. Specifically, the X is for space research, deep space operations, and environmental and military communica This paper examines the relationship between the mm wave receiver sensitivity and the noise floor over the X Integrated Satellite Communication (FISCA) applications (Fig.…”

Section: Introductionmentioning

confidence: 99%

8-12 GHz pHEMT MMIC Low-Noise Amplifier for 5G and Fiber-Integrated Satellite Applications

Uko

Ekpo

2020

IREASE

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The fifth-generation (5G) radio access technology promises to revolutionise integrated earth-space communications applications for ubiquitous, seamless and broadband services. The assigned sub-6 GHz and millimetre-wave 5G frequencies require the sensitivity of the receiver front-end subsystem(s) to detect and amplify the desired signal at a noise floor of less than -90 dBm for a cost-effective infrastructure deployment. This paper presents a broadband Monolithic Microwave Integrated Circuit (MMIC) Low-Noise Amplifier (LNA) design based on a 0.15 µm gate length Indium Gallium Arsenide (InGaAs) pseudomorphic high electron mobility transistor (pHEMT) technology for 5G and fiber-integrated satellite communications applications. The designed three-stage 8-12 GHz LNA implements a common-source topology. The MMIC LNA subsystem performance demonstrates an industry-leading in-band gain response of 40 dB; a noise figure of 1.0 dB; and a power dissipation of 43 mW. For a constant bandwidth receiver, the sensitivity changes by approximately 1.5 dB over the operating satellite signal frequency. Similarly, for a variable bandwidth receiver, the sensitivity changes by approximately 1.5 dB over the channel bandwidth. Moreover, the sensitivity margin of the designed LNA is 40 dB and this holds a great promise for real-time radio access component-level reconfiguration applications.

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Smart Diversity Through MIMO Satellite $Q/V$-Band Feeder Links

Cited by 21 publications

References 32 publications

On the Computation and Approximation of Outage Probability in Satellite Networks with Smart Gateway Diversity

On the Computation and Approximation of Outage Probability in Satellite Networks with Smart Gateway Diversity

Time and Phase Alignment of Distributed Gateways: Theoretical Analysis and Experimental Demonstration

8-12 GHz pHEMT MMIC Low-Noise Amplifier for 5G and Fiber-Integrated Satellite Applications

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