3GPP LTE eMBMS release (Rel-) 14, also referred to as further evolved multimedia broadcast multicast service (FeMBMS) or enhanced TV (EnTV), is the first mobile broadband technology standard incorporate a transmission mode designed deliver terrestrial services from conventional high power tower (HPHT) infrastructure. With respect physical layer, main improvements in FeMBMS are support of larger inter-site distance for single frequency networks (SFNs) and ability allocate 100% carrier's...

This paper provides an overview of the optional multiple-input multiple-output (MIMO) antenna scheme adopted in ATSC 3.0 to improve robustness or increase capacity via additional spatial diversity and multiplexing by sending two data streams a single radio frequency channel. Although it is not directly specified, expected practice use cross-polarized 2×2 MIMO (i.e., horizontal vertical polarization) retain capabilities line-of-sight conditions. allows overcoming channel limit wireless...

Rate-Splitting Multiple Access (RSMA) is a powerful and versatile physical layer multiple access technique that generalizes has better interference management capabilities than 5G-based Space Division (SDMA). It also rapidly maturing technology, all of which makes it natural successor to SDMA in 6G. In this article, we describe RSMA's suitability for 6G by presenting: i) link system level simulations performance gains over realistic environments, (ii) pioneering experimental results...

Abstract Mycobacterium tuberculosis ( Mtb ) is a major threat to global health and responsible for over one million deaths each year. To stem the tide of cases maximize opportunities early interventions, there an urgent need affordable simple means diagnosis in under-resourced areas. We sought develop CRISPR-based isothermal assay coupled with compatible, straightforward sample processing technique point-of-care use. Here, we combine Recombinase Polymerase Amplification (RPA) Cas13a Cas12a,...

DVB-NGH (Digital Video Broadcasting - Next Generation Handheld) is the next generation technology for mobile TV broadcasting, which has been developed by DVB project with most advanced transmission technologies. first broadcasting standard to incorporate multiple-input multiple-output (MIMO) as key overcome Shannon limit of single antenna communications. MIMO techniques can be used improve robustness transmitted signal exploiting spatial diversity channel, but also achieve increased data...

Transmit diversity code filter sets (TDCFSs) are a method of predistorting the common waveforms from multiple transmitters in same frequency channel, as single network, order to minimize possibility cross-interference among transmitted signals over entire reception area. This processing is achieved using all-pass linear filters, allowing resulting combination predistortion and multipath be properly compensated part equalization process receiver. The design utilizes an iterative computational...

This work provides a detailed performance analysis of the physical layer two state-of-the-art point-to-multipoint (PTM) technologies: evolved Multimedia Broadcast Multicast Services (eMBMS) and Advanced Television Systems Committee -Third Generation (ATSC 3.0).The these technologies is evaluated compared using link-level simulations, considering relevant identified scenarios.A selection Key Performance Indicators (KPI) for International Mobile Telecommunications 2020 (IMT-2020) evaluation...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBiomimetic Transformations of ParthenolideJosé Castañeda-Acosta, Nikolaus H. Fischer, and David VargasCite this: J. Nat. Prod. 1993, 56, 1, 90–98Publication Date (Print):January 1993Publication History Published online1 July 2004Published inissue 1 January 1993https://pubs.acs.org/doi/10.1021/np50091a013https://doi.org/10.1021/np50091a013research-articleACS PublicationsRequest reuse permissionsArticle Views514Altmetric-Citations46LEARN ABOUT THESE...

Non-uniform constellations (NUCs) have been recently introduced in digital broadcasting systems to close the remaining gap unconstrained Shannon theoretical limit. Compared uniform quadrature amplitude modulation (QAM) constellations, NUCs provide a signal-to-noise ratio (SNR) gain (i.e., reduction required SNR), especially for high-order constellations. One-dimensional (1D-NUC) squared shape with non-uniform distance between constellation symbols. Since I and Q components remain as two...

DVB-T2 implements a very flexible time interleaving that allows multiple tradeoffs in terms of diversity, latency and power saving. In this paper, we study detail these the context mobile reception. Together with also investigate impact reduced de-interleaving memory Alamouti-based MISO reception services. addition, propose utilization upper layer FEC protection order to overcome limitations physical for provision long interleaving, enable fast zapping. The performance is evaluated by means...

We consider the concept of faster-than-Nyquist rate (FTN) broadcasting, which nonorthogonally multiplexes more than one user message in continuous-time domain for transmission over broadcast channels. Two FTN broadcasting approaches, namely, sub-FTN and full-FTN, are considered K independent messages K-user continuous time Gaussian channel. The derived achievable regions two approaches shown to be, general, greater capacity region optimally coded Nyquist-rate using a same modulating pulse....

A key challenge for policymakers is how to design methods select beneficiaries of social programs when income volatile and the target population dynamic. We evaluate a traditional static proxy-means test (PMT) three policy-relevant alternatives. use unique panel dataset random sample households in Colombia's registry that contains information before, during, after 2020 economic crisis. Updating PMT data does not improve welfare relative PMT. Relaxing eligibility threshold reduces exclusion...

To cope with increasing demands for spectral efficiency, multiple-input multiple-output (MIMO) technology is being considered next generation terrestrial broadcasting television systems. In this paper, we propose a MIMO channel-precoder that utilizes channel statistical structure and suitable systems, while potentially transparent to the receivers. The performance of evaluated in wide set scenarios mismatched conditions, typical situation broadcast setup. Capacity results show improvements...

We study optimal delivery strategies of one common and K independent messages from a source to multiple users in wireless environments. In particular, two-layered superposition broadcast/multicast unicast signals is considered downlink multiuser OFDMA system. the literature industry, two-layer often as pragmatic approach make compromise between simple but suboptimal orthogonal multiplexing (OM) complex fully-layered non-orthogonal multiplexing. this work, we show that only two-layers are...

In this paper, we investigate the combined use of time, frequency, and space diversity in DVB-NGH, next generation mobile broadcasting standard. Compared to current standards like DVB-H or DVB-SH, largest improvement systems is expected be achieved by means better domains. sense, DVB-NGH first system exploit three domains incorporating at physical layer long time interleaving (TI), time-frequency slicing (TFS), multiple-input multiple-output (MIMO). This paper investigates gains using as...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Molecular Structure of 7α-Hydroxy-3-Desoxyzaluzanin C, a Molluscicidal Sesquiterpene LactoneFrank R. Fronczek, David Vargas, Nikolaus H. Fischer, and Kurt HostettmannCite this: J. Nat. Prod. 1984, 47, 6, 1036–1039Publication Date (Print):November 1, 1984Publication History Published online1 July 2004Published inissue 1 November 1984https://pubs.acs.org/doi/10.1021/np50036a026https://doi.org/10.1021/np50036a026research-articleACS...

Coworking space is a recent manifestation of the emerging sharing economy. This largely due to two core driving forces: new working style in creative and knowledge economies, economy, which promotes resource usage efficiency. paper develops an analytical framework for spatial perspectives on coworking spaces according forces at both urban architectural levels, followed by empirical studies practices related Beijing. The results indicate that city scale, tend aggregate clusters large-scale...

The demand for high bit-rate service transmission is increasing digital terrestrial broadcasting just like other technologies. Multiple-input multiple-output (MIMO) one of the most promising techniques to fulfill this rates. This paper introduces enhanced spatial multiplexing (eSM) scheme adopted as technical baseline DVB next generation handheld (DVB-NGH) system. Most challenges MIMO in comes from rate-2 performance degradation correlation channel condition, which frequently happens owing...

The first 5G (5th generation wireless systems) New Radio Release-15 was recently completed. However, the specification only considers use of unicast technologies and extension to point-to-multipoint (PTM) scenarios is not yet considered. To this end, we present in work a technical overview state-of-the-art LTE (Long Term Evolution) PTM technology, i.e., eMBMS (evolved Multimedia Broadcast Multicast Services), investigate physical layer performance via link-level simulations. Then based on...

3GPP Release 14 has further improved eMBMS to enable the provision of television services according requirements commonly found in broadcasting industry. The improvements include several radio interface enhancements such as support for larger inter-site distances SFN deployments, introduction a dedicated carrier with 100% broadcast resource allocation complete new, lower overhead subfrarne, stripping out unicast control region. Studied this paper are main innovations introduced respect...