R&amp;D Directions for Next Generation Broadband Multimedia Systems: An ESA Perspective

Arbesser‐Rastburg, B.; Bellini, R.; Coromina, F.; Gaudenzi, R. De; Rio, O. del; Hollreiser, M.; Rinaldo, Rita; Rinous, P.; Rœderer, A.

doi:10.2514/6.2002-1851

Cited by 26 publications

(30 citation statements)

References 7 publications

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“…The discussion above reveals that the proposed TMUX can be designed by determining and such that for for (4) where , and denotes the zeroth polyphase component of . In addition, the Farrow-based filter in the synthesis/analysis FB, i.e., should be designed such that for…”

Section: Filter Designmentioning

confidence: 99%

“…1, the TMUX generates a granularity band through upsampling by followed by a low-pass filter. As users can have bandwidths that are rational multiples of the granularity band, the Farrow-based filter 4 performs decimation by rational values . To place the users in appropriate positions in the frequency spectrum, variable frequency shifters are utilized.…”

Section: Proposed Multimode Tmux Structurementioning

confidence: 99%

“…This means that each user occupies a specific portion of the channel and this portion may vary with time. Examples of such dynamic communications systems are the network topologies proposed by the European Space Agency (ESA) for broadband satellite-based systems which aim to provide a global coverage for dynamic multistandard communications [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Multimode Transmultiplexer Structure

Eghbali

Johansson

Lowenborg

2008

IEEE Trans. Circuits Syst. II

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Abstract-This paper introduces a multimode transmultiplexer (TMUX) structure capable of generating a large set of user-bandwidths and center frequencies. The structure utilizes fixed integer sampling rate conversion (SRC) blocks, Farrow-based variable interpolation and decimation structures, and variable frequency shifters. A main advantage of this TMUX is that it needs only one filter design beforehand. Specifically, the filters in the fixed integer SRC blocks as well as the subfilters of the Farrow structure are designed only once. Then, all possible combinations of bandwidths and center frequencies are obtained by properly adjusting the variable delay parameter of the Farrow-based filters and the variable parameters of the frequency shifters. The paper includes examples for demonstration. It also shows that, using the rational SRC equivalent of the Farrow-based filters, the TMUX can be described in terms of conventional multirate building blocks which may be useful in further analysis of the overall system.

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Section: Filter Designmentioning

confidence: 99%

Section: Proposed Multimode Tmux Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Multimode Transmultiplexer Structure

Eghbali

Johansson

Lowenborg

2008

IEEE Trans. Circuits Syst. II

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“…Digital signal processing on-board communication satellites (OBP) is an active field of research where, in conjunction with frequency division multiplex (FDMA) systems, presently two trends and challenges are observed, respectively: i) The need of an ever-increasing number of user channels makes it necessary to digitally process, i.e. to demultiplex, cross-connect and remultiplex, ultra-wideband FDM signals requiring high-end sampling rates that range considerably beyond 1GHz [Arbesser-Rastburg et al (2002);Maufroid et al (2004;2003); Rio-Herrero & Maufroid (2003); Wittig (2000)], and ii) the desire of flexibility of channel bandwidth-to-user assignment calling for simply reconfigurable OBP systems [Abdulazim & Göckler (2005); Göckler & Felbecker (2001);Johansson & Löwenborg (2005); Kopmann et al (2003)]. Yet, overall power consumption must be minimum demanding highly efficient FB for FDM demultiplexing (FDMUX) and remultiplexing (FMUX).…”

Section: Parallelisation Of Tree-structured Filter Banks Composed Of mentioning

confidence: 99%

Most Efficient Digital Filter Structures: The Potential of Halfband Filters in Digital Signal Processing

Gockler¹

2011

Applications of Digital Signal Processing

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“…to demultiplex, crossconnect and remultiplex, ultra-wideband FDM signals requiring high end sampling rates that range considerably beyond 1GHz [1], [2], [3], [4], [5], and ii) the desire of flexibility of channel bandwidth-to-user assignment calling for simply reconfigurable OBP systems [6], [7], [8], [9]. Yet, overall power consumption must be minimum demanding highly efficient filter banks for FDM demultiplexing (FDMUX) and remultiplexing (FMUX).…”

Section: Introductionmentioning

confidence: 99%

Parallelisation of Digital Signal Processing in Uniform and Reconfigurable Filter Banks for Satellite Communications

Gockler

Groth

Abdulazim

2006

APCCAS 2006 - 2006 IEEE Asia Pacific Conference on Circuits and Systems

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Abstract-Modern satellite communication calls for novel and flexible concepts for de-and remultiplexing of wide-band FDM-signals in conjunction with beam switching on-board a satellite. For this application, two highly efficient approaches to uniform and yet reconfigurable digital filter banks are known: i) the complex-modulated polyphase filter bank, and ii) the treestructured filter bank.Channelising and remultiplexing of (ultra-)wide-band FDMsignals require high end sample rates that, often, range beyond technological limit (e.g. > 1GHz). A remedy is to process the signals at a lower rate in a parallel manner. While the polyphase approach i) applying one-step sample rate alteration (down/upsampling) inherently operates in parallel, the hierarchical approach ii) being based on stepwise sample rate alteration calls for the parallelisation of, at least, the high rate stages.In this contribution, the systematic sample-by-sample processing procedure for parallelisation of multirate systems by Groth is recalled. It is applied to the parallelisation of a novel class of treestructured filter banks: The various steps towards parallelisation of the high rate front end of the FDM-demultiplexer part of the filter bank are described in detail.

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R&D Directions for Next Generation Broadband Multimedia Systems: An ESA Perspective

Cited by 26 publications

References 7 publications

A Multimode Transmultiplexer Structure

A Multimode Transmultiplexer Structure

Most Efficient Digital Filter Structures: The Potential of Halfband Filters in Digital Signal Processing

Parallelisation of Digital Signal Processing in Uniform and Reconfigurable Filter Banks for Satellite Communications

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