نتایج جستجو برای: diversity gain

تعداد نتایج: 350487  

2018
Sonia E Eynard Pascal Croiseau Denis Laloë Sebastien Fritz Mario P L Calus Gwendal Restoux

Genomic selection (GS) is commonly used in livestock and increasingly in plant breeding. Relying on phenotypes and genotypes of a reference population, GS allows performance prediction for young individuals having only genotypes. This is expected to achieve fast high genetic gain but with a potential loss of genetic diversity. Existing methods to conserve genetic diversity depend mostly on the ...

2010
Iván Alfaro

Data from 247 global software development teams were used to examine the impact of temporal dispersion and leadership roles on the relationship between nationality diversity and team performance. Nationality diversity was positively related to team performance when project leaders regularly coordinate and monitor team members’ activities, and acted as mentors and facilitator. However, when nati...

2013
Wei Guan K. J. Ray Liu

Title of dissertation: COOPERATIVE COMMUNICATION WITH WIRELESS NETWORK CODING Wei Guan, Doctor of Philosophy, 2013 Dissertation directed by: Professor K. J. Ray Liu Department of Electrical and Computer Engineering Cooperative communication is a new communication paradigm that allows multiple transceivers to collaborate as a cluster for data transmission, and such clustering could greatly impro...

2013
Wei Guan K. J. Ray Liu

Title of dissertation: COOPERATIVE COMMUNICATION WITH WIRELESS NETWORK CODING Wei Guan, Doctor of Philosophy, 2013 Dissertation directed by: Professor K. J. Ray Liu Department of Electrical and Computer Engineering Cooperative communication is a new communication paradigm that allows multiple transceivers to collaborate as a cluster for data transmission, and such clustering could greatly impro...

Journal: :IEEE Trans. Vehicular Technology 2000
Milica Stojanovic Zoran Zvonar

Performance of differential phase-shift keying (DPSK) is considered for fading channels with nonnegligible time-variation, as well as signal or noise correlation between diversity branches. A differentially coherent maximum-ratio combiner is derived, showing optimal weight dependence on the fading statistics. Bit error rate (BER) is evaluated analytically for Rayleigh fading, and comparison is ...

Journal: :IEEE Trans. Information Theory 2003
Hsiao-feng Lu P. Vijay Kumar

In this correspondence, we show that for any (Q×M) space-time code S having a fixed, finite signal constellation, there is a tradeoff between the transmission rate R and the transmit diversity gain ν achieved by the code. The tradeoff is characterized by R ≤ Q−ν +1, where Q is the number of transmit antennas. When either BPSK or QPSK is used as the signal constellation, a systematic constructio...

Journal: :IEICE Transactions 2012
Jeonghwa Yoo Sangho Choe Nazcar Pine

We present multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) based broadband power line communication (BPLC) using antenna and fading diversity. We evaluate the proposed MIMO-OFDM system over multi-conductor power line channels, with or without cross-talk between the antenna paths. The proposed scheme employs maximum ratio combining (MRC) that effectively com...

1999
Christian Braun Martin Nilsson Claes Beckman

We report an investigation into the interference rejection capabilities of a dual antenna system on a mobile telephone prototype for the 1800 MHz band. The investigation is done by means of narrowband downlink channel measurements in a microcellular-like environment. Complex signal samples are used in order to investigate the interference rejection gain with di erent diversity combining schemes...

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