Time Frequency Slicing for Future Digital Terrestrial Broadcasting Networks

Giménez, Jordi Joan; Stare, Erik; Bergsmark, Staffan; Gómez-Barquero, David

doi:10.1109/tbc.2014.2315766

Cited by 10 publications

(16 citation statements)

References 15 publications

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“…This effect can be maximised by interleaving a service across the total used spectrum, e.g. by using frequency-hopping techniques like Time-Frequency Slicing (TFS), see (2) and Giménez et al (4).…”

Section: Peak Service Data Rate and Tuner Bandwidthmentioning

confidence: 99%

WIB: a new system concept for digital terrestrial television (DTT)

Stare

Giménez²,

Klenner³

2016

IBC 2016 Conference

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A new system concept for DTT, called "WiB", is presented, where potentially all frequencies within the Ultra High Frequency (UHF) band are used on all transmitter (TX) sites (i.e. reuse-1). The interference, especially from neighbouring transmitters operating on the same frequency while transmitting different information, is handled by a combination of a robust transmission mode, directional discrimination of the receiving antenna and interference cancellation methods. With this approach, DTT may be transmitted as a single wideband signal, covering potentially the entire UHF band, from a single wideband transmitter via the TX site. Thanks to a higher spectrum, utilisation, the approach allows for a dramatic reduction in fundamental power/cost and approximately a 37-60% capacity increase for the same coverage as with current DTT. High speed mobile reception as well as fine granularity local services would also be supported, without any loss of capacity. The paper also outlines further possible developments of WiB, e.g. doubling the capacity via cross-polar Multiple In Multiple Out (MIMO), backward-compatible with existing receiving antennas, and adding a second, WiB-mobile, Layer Division Multiplexing (LDM) layer within the same spectrum, either as a mobile broadcast or as a mobile broadband.

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Section: Peak Service Data Rate and Tuner Bandwidthmentioning

confidence: 99%

WIB: a new system concept for digital terrestrial television (DTT)

Stare

Giménez²,

Klenner³

2016

IBC 2016 Conference

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“…Regions 1 (Europe and Africa) and 3 (Asia) allocated the 800 MHz band (790-862 MHz, channels [61][62][63][64][65][66][67][68][69] for fourth generation (4G) LTE services, and Region 2 (America) allocated the 700 MHz band (698-806 MHz, channels [52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69]. In the WRC-12, the ITU concluded with a decision to allocate additional UHF spectrum to mobile services.…”

Section: First and Second Digital Dividendsmentioning

confidence: 99%

“…For most countries, releasing the 700 MHz band will require a new re-tune of existing DTT networks. Implementing the DD2 within ITU Region 1 affects up to eleven more DTT channels (49)(50)(51)(52)(53)(54)(55)(56)(57)(58)(59)(60), creating a number of challenges. Since cellular terminals are closer to the DTT receivers than base stations, interference issues may be relevant in the 700 MHz band [4].…”

Section: First and Second Digital Dividendsmentioning

confidence: 99%

“…Simulation results and theoretical analysis also show the potential gains and limits of TFS. The use of this multi-RF technique is also studied in [60]. The papers investigate the potential advantages of TFS by means of field measurements as well as simulations and discusses practical implementation aspects and requirements regarding transmission and reception.…”

Section: Combination With Advanced Signal Processing Techniquesmentioning

confidence: 99%

“…In such case, it is desirable that each component is transmitted in a different RF channel using a proper CIL, which must be redesigned. Results can be also extended to any multi-RF technology, such as Time-Frequency Slicing (TFS) [60]. TFS was proposed in DVB-T2 and adopted in DVB-NGH (Next-Generation Handheld) [14].…”

Section: Non-uniform Rotated Constellationsmentioning

confidence: 99%

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Non-Uniform Constellations for Next-Generation Digital Terrestrial Broadcast Systems

Muela¹

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Nowadays, the digital terrestrial television (DTT) market is characterized by the high capacity needed for high definition TV services, and the limited spectrum available. There is a need for an efficient use of the broadcast spectrum, which requires new technologies to guarantee increased capacities. NonUniform Constellations (NUC) arise as one of the most innovative techniques to approach those requirements. These constellations have been implemented in next-generation broadcast systems such as DVB-NGH (Digital Video Broadcasting -Next Generation Handheld) or ATSC 3.0 (Advanced Television Systems Committee -Third Generation). NUCs reduce the gap between uniform Gray-labelled Quadrature Amplitude Modulation (QAM) constellations and the theoretical unconstrained Shannon limit. With these constellations, symbols are optimized in both in-phase (I) and quadrature (Q) components by means of signal geometrical shaping, considering a certain signal-to-noise ratio (SNR) and channel model.There are two types of NUC, depending on the number of real-valued dimensions considered in the optimization process, i.e. one-dimensional and two dimensional NUCs (1D-NUC and 2D-NUC, respectively). 1D-NUCs maintain the squared shape from QAM, but relaxing the distribution between constellation symbols in a single component, with non-uniform distance between them. These constellations provide better SNR performance than QAM, without any demapping complexity increase. 2D-NUCs also relax the square shape constraint, allowing to optimize the symbol positions in both dimensions, thus achieving higher capacity gains and lower SNR requirements. However, the use of 2D-NUCs implies a higher demapping complexity, since a 2D-demapper is needed, i.e. I and Q components cannot be separated.In this dissertation, NUCs are analyzed from both transmit and receive point of views, using either single-input single-output (SISO) or multiple-input multiple-output (MIMO) antenna configurations. In SISO transmissions, 1D-NUCs and 2D-NUCs are optimized for a wide range of SNRs, several channel models and different constellation orders, using the Nelder-Mead optimization 3 ABSTRACT algorithm. The optimization of rotated 2D-NUCs is also investigated, including the rotation angle as an additional variable in the optimization. Even though the demapping complexity is not increased, the SNR gain of these constellations is not significant. The highest rotation gain is obtained for low-order constellations and high SNRs. However, with multi-RF techniques such as Channel Bonding (CB) or Time-Frequency Slicing (TFS), the SNR gain is drastically increased, since I and Q components are transmitted in different RF channels. In this thesis, multi-RF gains of NUCs with and without rotation are provided for some representative scenarios.At the receiver, two different implementation bottlenecks are explored. First, the demapping complexity of all considered constellations is analyzed. Afterwards, two complexity reduction algorithms for 2D-NUCs are proposed. Both algor...

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