In this work we investigate the possibilities of combining diversity techniques with a Single Carrier System with Frequency Domain Equalization (SC/FDE), as future transmission concepts will also be judged by their possibilities to be combined with multiple antennas. Concepts of multiple antennas allow either a significant performance gain through diversity or significant higher capacity based ...

Multiple-input multiple-output (MIMO) wireless systems are of interest due to their ability to provide substantial gains in capacity and quality. This paper proposes equal gain transmission (EGT) to provide diversity advantage in MIMO systems experiencing Rayleigh fading. The applications of EGT with selection diversity combining, equal gain combining, and maximum ratio combining are addressed....

In this contribution the performance of wideband code-division multiple-access (W-CDMA) systems using spacetime spreading (STS) based transmit diversity is investigated, when frequency-selective Nakagami-m fading channels, multiuser interference and background noise are considered. The analysis and numerical results suggest that significant diversity gain can be achieved by employing several tr...

biodiversity/biological diversity Species, genetic, and ecosystem diversity in an area, sometimes including associated abiotic components such as landscape features, drainage systems, and climate. diversity indices Measures that describe the different components of biodiversity, such as species richness (alpha diversity), beta and gamma diversity, endemicity, and higher taxon richness. ecosyste...

In this paper, we deene and formalize the concept of software diversity, which characterizes N-Version Software (NVS) from four diierent points of view that are designated as: structural diversity, fault diversity, tough-spot diversity, and failure diversity. Our goals are to nd a way to quantify software diversity and to investigate the measurements which can be applied during the life cycle o...

The joint optimization scheme that combined asymmetric modulation with modulation diversity in bitinterleaved space-time coded modulation system (BI-STCM) was proposed. The upper pairwise error possibility was analyzed in BI-STCM under Rayleigh fading channels. The method of achieving modulation diversity and the optimal rotated angle of the constellation to achieve the maximum diversity gain w...

Space diversity is one of the important techniques of overcoming the influence of atmospheric turbulence on laser communication. Having analyzed the theory of diversity technique, the paper has focused on researching the space diversity technique and established the joint probability density function of the threshold value. Outage probability is studied in laser communication and get the variat...

1 this work has been supported by Airtel company (Spain) Abstract: This work summarizes the results of a measurement campaign undertaken to evaluate the performance of two branch space and polarization diversity schemes at 900 MHz in different environments (urban, suburban, rural flat and rural hilly). A total number of 783 runs were made covering these sites and using different transmitter ant...

This paper proposes high-rate full-diversity spacefrequency trellis code (SFTC) designs, which achieve the full diversity advantage at high transmission rate, for frequency selective fading channels. The proposed SFTC are derived based on the concept of concatenated space-time block code (STBC) and multiple trellis coded modulation (MTCM) encoder constructions. The existing SFTC designs only pr...

Efficient bandwidth utilization is paramount in wireless communication systems, particulary in fading environments, since fading is one of the major constraints that impair communication in wireless systems. The bandwidth efficiency of a wireless communication system can be enhanced significantly by employing power and modulation adaptation policies with diversity combining gain. In this work, ...