نتایج جستجو برای: diversity gain
تعداد نتایج: 350487 فیلتر نتایج به سال:
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 ...
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...
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...
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...
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 ...
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...
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...
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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