To MIMO or Not To MIMO in Mobile Satellite Broadcasting Systems

Arapoglou, Pantelis-Daniel; Burzigotti, P.; Bertinelli, Massimo; Alamanac, Ana Bolea; Gaudenzi, R. De

doi:10.1109/twc.2011.071411.101599

Cited by 57 publications

(46 citation statements)

References 15 publications

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“…MILSATCOM links at X and Ka bands consist primarily of line-of-sight (LOS) signal paths with no scatterers or multi-path effects. A general conclusion from the literature is that, in LOS channels, polarization diversity can readily benefit from MIMO techniques [3], [4] compared to benefits obtained from spatial diversity. On the other hand, spatial diversity can offer more degrees of freedom (>2) to increase the channel capacity.…”

Section: Introductionmentioning

confidence: 99%

Dual Polarization Frequency Reuse in SATCOM: A Method to Counter Poor Cross-Polar Isolation

Ramamurth

Cowle

Davis

et al. 2014

2014 IEEE Military Communications Conference

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Utilizing orthogonal polarizations is a well-known frequency reuse technique in satellite communications (SAT-COM) to provide additional spectrum in a given geographical region. However, in practice there will be a link degradation due to cross talk between the two polarization channels. The cross talk results from the combined effects of the antenna's imperfect ability to distinguish between the two polarizations and channel depolarization effects. Greater cross-polar isolation (XPI) reduces the link degradation in terms of the received signal to noise plus interference ratio (SNIR). The effect of cross talk can be significant, limiting the benefits of using orthogonal polarizations. In this paper we evaluate the XPI impact in terms of received SNIR when using orthogonal polarizations. We then propose the use of a multiple input multiple output (MIMO) singular value decomposition technique (SVD) to mitigate the XPI impact.

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Section: Introductionmentioning

confidence: 99%

Dual Polarization Frequency Reuse in SATCOM: A Method to Counter Poor Cross-Polar Isolation

Ramamurth

Cowle

Davis

et al. 2014

2014 IEEE Military Communications Conference

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“…A dual polarization per beam paradigm is introduced in [9]. The beams of the MSS serve as the cells of the terrestrial cellular system, signals from different beams will meet together at the satellite transponder.…”

Section: Introductionmentioning

confidence: 99%

Pilot sequence design for GEO multi-beam MIMO satellite communication system

Qiang

Jiang

Gao

2014

2014 Sixth International Conference on Wireless Communications and Signal Processing (WCSP)

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The inter-beam interference has been shown to be a critical factor in multi-beam satellite communication systems. This paper proposes a novel pilot sequence design criterion aiming at mitigating the inter-beam interferences. The proposed multi-beam optimality criterion is to minimize the worst-case mean square error (MSE) of an least square (LS) based channel estimator. It is shown that we can obtain the optimal pilots eliminating the inter-beam interference on certain condition. To enlarge the size of available pilot sequence set, we give a suboptimal pilot design guideline. Multi-beam pilot sequence design for code division multiplexing (CDM) pilot types is proposed by adopting Chu sequences. Simulation results are presented to verify the theoretical analysis.

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“…A number of possibilities for applying MIMO to the LMS channel exist, multiple satellite systems (satellite diversity) and multiple antennas on a single satellite (polarisation diversity) being the two most promising implementations. Of the two, polarisation diversity is currently the most appealing and has prompted a wealth of research into the statistical channel modelling of the dual polarised MIMO LMS channel [3] and the possible benefits of incorporating such a system into current MSB systems [4], [5]. It has been presented in [5] that incorporating a 2x2 dual polarised beams increases the detrimental effects of the carrier-to-interference ratio.…”

Section: Introductionmentioning

confidence: 99%

A comparison of precoding techniques for the dual polarised land mobile satellite channel

Mhearain

Sellathurai

Masouros³

2014

2014 7th Advanced Satellite Multimedia Systems Conference and the 13th Signal Processing for Space Communications Workshop (ASM

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The dual polarised MIMO land mobile satellite channel offers spatial multiplexing gain for mobile broadcasting systems. Antenna diversity in satellite systems is difficult to obtain, due to the nature of the satellite channel and the absence of scatterers in the vicinity of the satellite transmitter; therefore dual polarisation offers a potential solution in achieving diversity. Receiver based equalisation has been explored for the LMS channel to date; this paper aims to explore the potential of transmitter based equalisation by investigating existing precoders and their performance in the dual polarised MIMO LMS channel. The case of a single-user is considered in which interference arises from cross-polarisation effects caused by propagation between two orthogonally circularly polarised transmit and receive antennas. To mitigate the effects of interference on the performance of the channel, precoding algorithms are implemented on the data to be transmitted whilst assuming channel state information at the transmitter is available. Linear precoding techniques, i.e. channel inversion, regularised channel inversion, selective channel inversion & correlation rotation, in addition to the nonlinear precoding technique, Tomlinson-Harashima Precoding, are implemented and the error performance is investigated in three user environments; open rural, suburban and urban. The effects of the power loss and the increased dynamic range of the signal associated with each precoder are explored. The precoding analysis has been conducted using channel measurements recently obtained during the MIMOSA campaign conducted by the European Space Agency (ESA).

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To MIMO or Not To MIMO in Mobile Satellite Broadcasting Systems

Cited by 57 publications

References 15 publications

Dual Polarization Frequency Reuse in SATCOM: A Method to Counter Poor Cross-Polar Isolation

Dual Polarization Frequency Reuse in SATCOM: A Method to Counter Poor Cross-Polar Isolation

Pilot sequence design for GEO multi-beam MIMO satellite communication system

A comparison of precoding techniques for the dual polarised land mobile satellite channel

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