Precoding in Multigateway Multibeam Satellite Systems

Joroughi, Vahid; Vázquez, Miguel Ángel; Pérez-Neira, Ana I.

doi:10.1109/twc.2016.2550023

Cited by 52 publications

(43 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the first hop, the satellite‐to‐relay channels are assumed to be Gaussian. The Gaussian channel model assumption is valid for clear sky conditions . On the other hand, for relay‐to‐user links, small scale fading needs to be taken into account.…”

Section: Relay‐assisted Dual Satellite Systemmentioning

confidence: 99%

Terrestrial Relay‐Aided Cooperative High Throughput Satellite Systems

Sirigina

Madhukumar

Bowyer

2020

Satell Commun Network

View full text Add to dashboard Cite

Summary Full frequency reuse based dual satellite system (DSS) is investigated in this work. In the case of DSS, user terminals receive inter spot beam and intra spot beam interfering signals due to the simultaneous transmission of data from both satellites. Cooperative precoding algorithm is proposed to mitigate these effects. The achievable data rates with zero‐forcing (ZF) and regularized ZF precoding algorithms are characterized. If the user terminals served by both satellites are colocated, then the proposed cooperative precoding algorithm fails because of correlated channels. To this end, relay‐aided DSS (RA‐DSS) is proposed. The achievable data rates of both full‐duplex and half‐duplex RA‐DSSs are characterized. Through simulations, it is shown that the proposed full‐duplex RA‐DSS achieves better data rate than the DSS, single satellite system, and orthogonal transmission even if the users are closely placed.

show abstract

Section: Relay‐assisted Dual Satellite Systemmentioning

confidence: 99%

Terrestrial Relay‐Aided Cooperative High Throughput Satellite Systems

Sirigina

Madhukumar

Bowyer

2020

Satell Commun Network

View full text Add to dashboard Cite

show abstract

“…The matrix H includes the propagation losses and radiation pattern, and as such is decomposed as [5] …”

Section: A System Modelmentioning

confidence: 99%

“…Moreover, with the SVD of H−mR H m = Ur,−mΣr,−mV H r,−m , the matrix V 0 r,−m refers to the null space of (H−mR H m ). The reader can refer to [5] and [10] for more methodologies to find the null space of a matrix in case of K−m > Nm. It is worth to note here that the rest of the analytic analysis of this section is developed taking into account K−m < Nm degree of freedom at the payload.…”

Section: Precoding and Bfn In Bmgp A Precoding Designmentioning

confidence: 99%

“…Even if the dimension employed in multiple GW architecture leads to drastically increase in the available FL bandwidth resource, however, this dimension limits the effectiveness of the interference mitigation techniques and therefore the system throughput is decreased with respect to the single GW scenario [5], [7]. 2) Lower-bound reference, developing the BFN in BMGP network through the Discrete Fourier Transform (DFT) approach which is detailed in [7].…”

Section: B Fixed Bfn Designmentioning

confidence: 99%

See 1 more Smart Citation

Designing joint precoding and beamforming in a multiple gateway multibeam satellite system

Joroughi

Shankar

Maleki

et al. 2018

2018 IEEE Wireless Communications and Networking Conference (WCNC)

Self Cite

View full text Add to dashboard Cite

Abstract-This paper aims to design joint on-ground precoding and on-board beamforming of a multiple gateway multibeam satellite system in a hybrid space-ground mode where full frequency reuse pattern is considered among the beams. In such an architecture, each gateway serves a cluster of adjacent beams such that the adjacent clusters are served through a set of gateways that are located at different geographical areas. However, such a system brings in two challenges to overcome. First, the inter-beam interference is the bottleneck of the whole system and applying interference mitigation techniques becomes necessary. Second, as the data demand increases, the ground and space segments should employ extensive bandwidth resources in the feeder link accordingly. This entails embedding an extra number of gateways aiming to support a fair balance between the increasing demand and the corresponding required feeder link resources. To solve these problems, this study investigates the impact of employing a joint multiple gateway architecture and onboard beamforming scheme. It is shown that by properly designing the on-board beamforming scheme, the number of gateways can be kept affordable even if the data demand increases. Moreover, Zero Forcing (ZF) precoding technique is considered to cope with the inter-beam interference where each gateway constructs a part of block ZF precoding matrix. The conceived designs are evaluated with a close-to-real beam pattern and the latest broadband communication standard for satellite communications.

show abstract

“…Even though this link is placed at the Q/V band where a large bandwidth is available, the use of multiple gateways is required [7]. Since the data is precoded in isolated geographic areas, the precoding technique shall be reconsidered [8]. Based on the results of [8], even though the gateways exchange all the channel state information, the precoding gains are limited compared to the single gateway case.…”

Section: Introductionmentioning

confidence: 99%