Abstract In a frequency-selective fading channel, the performance of single-carrier (SC) transmission significantly degrades due to severe inter-symbol-interference (ISI). In this paper, delay transmit diversity and space-time transmit diversity (STTD) as transmit diversity are combined with minimum mean square error (MMSE) frequency-domain equalization achieving frequency diversity effect whil...

Given the scarcity of empirical research on the impact of diversity on organizational performance, we used longitudinal data for 100 firms to test hypotheses related to the effects of diversity reputation and leader racial diversity on firm financial outcomes. The results showed a positive relationship between diversity reputation and book-to-market equity, and a curvilinear U-shaped relationsh...

It is well known that the third generation partnership project (3GPP) for WCDMA FDD has chosen Space Time Transmit Diversity (STTD) (known also as open loop transmit diversity) and Feedback Mode Transmit Diversity (FBTD) (known also as closed loop transmit diversity) as transmit diversity techniques for two transmit antennas. In this paper, we look into the performance of closed loop transmit d...

While plant diversity is well known to increase primary productivity, whether these bottom-up effects are enhanced by reciprocal top-down effects from the third trophic level is unknown. We studied whether pine tree species diversity, aphid-tending ants and their interaction determined plant performance and arthropod community structure. Plant diversity had a positive effect on aphids, but only...

Decreased plant diversity is expected to reduce ecosystem function. Although many studies have examined eff ects of plant species on trophic interactions, information regarding eff ects of native or non-native plant diversity on performance of individuals of higher trophic levels is limited. We reared larval American toad Anaxyrus americanus tadpoles in outdoor mesocosms containing litter of 1,...

Article history: Received 19 June 2012 Received in revised form 8 March 2013 Accepted 16 August 2013 Available online xxxx This study conducts a 9-year longitudinal analysis on the effects of diversity of R&D sources, diversity of human capital, innovation infrastructure and academic knowledge on industrial performance. Here, I suggest there is an inverse U-shaped relationship between diversity...

One of the main design challenges in wireless sensor networks (WSNs) is achieving a high-data-rate transmission for individual sensor devices. The high altitude platform (HAP) is an important communication relay platform for WSNs and next-generation wireless networks. Multiple-input multiple-output (MIMO) techniques provide the diversity and multiplexing gain, which can improve the network perf...