Design and Evaluation of a Multilevel Decoder for Satellite Communications

Vargas, Aharon; Breiling, Marco; Gerstacker, Wolfgang H.

doi:10.1109/icc.2009.5198899

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…Other works improve the performance of relay communication system [10] or OFDMA-based networks [11]. Finally, multilevel codes are another way to deal with broadcast channels using hierarchical transmission [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Combining Adaptive Coding and Modulation With Hierarchical Modulation in Satcom Systems

Meric

Lacan

Arnal

et al. 2013

IEEE Trans. on Broadcast.

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We investigate the design of a broadcast system in order to maximize throughput. This task is usually challenging due to channel variability. Forty years ago, Cover introduced and compared two schemes: time sharing and superposition coding. Even if the second scheme was proved to be optimal for some channels, modern satellite communications systems such as DVB-SH and DVB-S2 rely mainly on a time sharing strategy to optimize the throughput. They consider hierarchical modulation, a practical implementation of superposition coding, but only for unequal error protection or backward compatibility purposes. In this article, we propose to combine time sharing and hierarchical modulation together and show how this scheme can improve the performance in terms of available rate. We introduce a hierarchical 16-APSK to boost the performance of the DVB-S2 standard. We also evaluate various strategies to group the receivers in pairs when using hierarchical modulation. Finally, we show in a realistic case, based on DVB-S2, that the combined scheme can provide throughput gains greater than 10% compared to the best time sharing strategy.

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Section: Introductionmentioning

confidence: 99%

Combining Adaptive Coding and Modulation With Hierarchical Modulation in Satcom Systems

Meric

Lacan

Arnal

et al. 2013

IEEE Trans. on Broadcast.

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“…An MLC scheme suitable for satellite broadcasting communications has been proposed in [7] and further investigated in [8], where a typical bit-interleaved coded modulation (BICM) [9] scheme and an MLC scheme are compared. The MLC approach presents more flexibility when setting different levels of QoS, and the highly protected levels can operate at lower signal-to-noise ratios (SNRs) than the BICM approach.…”

Section: Introductionmentioning

confidence: 99%

“…SYSTEM MODEL MLC has been proposed for satellite broadcasting systems in [6] and [7], where only the effect of an AWGN channel has been analyzed. A more accurate channel description, based on 978-1-4244-8331-0/11/$26.00 ©2011 IEEE an LMS channel model [10], is considered in [8] to obtain more realistic performance results for MLC in a satellite broadcasting system.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Satellite System Impairments on a Multilevel Coding System for Satellite Broadcasting

Vargas

Keip

Gerstacker

et al. 2011

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)

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In this paper, we evaluate a multilevel coding (MLC) scheme with multistage decoding (MSD) designed for satellite broadcasting communications. The impact of three different satellite system impairments on the decoding performance is analyzed. First, the influence of errors introduced by the channel estimation is discussed, assuming a typical data-aided (DA) channel estimator with different pilot lengths. Second, the impact of the residual phase noise present after the phase recovery is investigated using a model based on a normal distribution. Finally, the degradation introduced by the non-linearities of the satellite power amplifiers is also analyzed. The impact of these effects is investigated via the mutual information. Besides, bit error rate (BER) simulations are performed for each impairment effect. The considered MLC scheme is compared to a classical bit-interleaved coded modulation (BICM) scheme, showing that the MLC scheme provides different grades of robustness for each level.

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Multidimensional Multilevel Coding for Satellite Broadcasting with Highly Flexible QoS

Vargas

Gerstacker

Breiling

et al. 2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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Abstract-We introduce the use of multidimensional (MD) constellations in a multilevel coding (MLC) scheme with multistage decoding (MSD) designed for broadcasting communications, where services with different quality of service (QoS) are desirable. We show that the number of different protection levels increases when using MD constellations. Besides, the appropriate block labeling (BL) partitioning for an MD constellation is found by applying the binary switching algorithm (BSA) as an efficient search algorithm. Two cost functions for the BSA are proposed based on the BL criterion. Some methods to construct an appropriate MD constellation are presented, including the use of uniform and non-uniform component constellations. The viability of the proposed MD constellations approach for broadcasting with different protection levels is evaluated analyzing the mutual information (MI) of each level. Finally, we present a comparison between a unidimensional and a multidimensional scheme which again demonstrates the benefits of the proposed scheme.

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Design and Evaluation of a Multilevel Decoder for Satellite Communications

Cited by 6 publications

References 12 publications

Combining Adaptive Coding and Modulation With Hierarchical Modulation in Satcom Systems

Combining Adaptive Coding and Modulation With Hierarchical Modulation in Satcom Systems

Effect of Satellite System Impairments on a Multilevel Coding System for Satellite Broadcasting

Multidimensional Multilevel Coding for Satellite Broadcasting with Highly Flexible QoS

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