Matches in SemOpenAlex for { <https://semopenalex.org/work/W69393118> ?p ?o ?g. }
Showing items 1 to 67 of
67
with 100 items per page.
- W69393118 abstract "The application of space-time coding in wireless communication systems has shown to improve the quality of the received signal at the mobile user by placing the spatial diversity at the base station. In this thesis, we propose a simple space-time spreading scheme for code-division multiple-access (CDMA) systems over fast-fading channels. The proposed transmit diversity scheme is based on two transmit and M receive antennas and is suitable for Rayleigh fast-fading channels. In this we employ orthogonal spreading codes to exploit the time diversity introduced by the channel, and hence a two-fold of the diversity order obtained using existing spacetime spreading schemes is achieved. Nevertheless, for slowly-fading channels, we show that the proposed coding scheme reduces to existing schemes introduced in the literature with no performance degradation. Then, we examine the effect of using nonorthogonal spreading codes on the receiver performance. Our results show that using a simple adaptive decoder, based on the minimum mean-squared error (MMSE) criterion, the diversity order is still maintained and only a small loss in the signal-to noise ratio (SNR) is incurred relative to the ideal case with orthogonal codes." @default.
- W69393118 created "2016-06-24" @default.
- W69393118 creator A5015681180 @default.
- W69393118 date "2006-01-01" @default.
- W69393118 modified "2023-09-27" @default.
- W69393118 title "Space-time spreading and transmit diversity for DS-CDMA systems over fading channels" @default.
- W69393118 hasPublicationYear "2006" @default.
- W69393118 type Work @default.
- W69393118 sameAs 69393118 @default.
- W69393118 citedByCount "1" @default.
- W69393118 crossrefType "dissertation" @default.
- W69393118 hasAuthorship W69393118A5015681180 @default.
- W69393118 hasConcept C11413529 @default.
- W69393118 hasConcept C117218131 @default.
- W69393118 hasConcept C127413603 @default.
- W69393118 hasConcept C132778218 @default.
- W69393118 hasConcept C198746922 @default.
- W69393118 hasConcept C24326235 @default.
- W69393118 hasConcept C41008148 @default.
- W69393118 hasConcept C47696715 @default.
- W69393118 hasConcept C555944384 @default.
- W69393118 hasConcept C56985126 @default.
- W69393118 hasConcept C57273362 @default.
- W69393118 hasConcept C60069766 @default.
- W69393118 hasConcept C76155785 @default.
- W69393118 hasConcept C81978471 @default.
- W69393118 hasConceptScore W69393118C11413529 @default.
- W69393118 hasConceptScore W69393118C117218131 @default.
- W69393118 hasConceptScore W69393118C127413603 @default.
- W69393118 hasConceptScore W69393118C132778218 @default.
- W69393118 hasConceptScore W69393118C198746922 @default.
- W69393118 hasConceptScore W69393118C24326235 @default.
- W69393118 hasConceptScore W69393118C41008148 @default.
- W69393118 hasConceptScore W69393118C47696715 @default.
- W69393118 hasConceptScore W69393118C555944384 @default.
- W69393118 hasConceptScore W69393118C56985126 @default.
- W69393118 hasConceptScore W69393118C57273362 @default.
- W69393118 hasConceptScore W69393118C60069766 @default.
- W69393118 hasConceptScore W69393118C76155785 @default.
- W69393118 hasConceptScore W69393118C81978471 @default.
- W69393118 hasLocation W693931181 @default.
- W69393118 hasOpenAccess W69393118 @default.
- W69393118 hasPrimaryLocation W693931181 @default.
- W69393118 hasRelatedWork W145885974 @default.
- W69393118 hasRelatedWork W1484098127 @default.
- W69393118 hasRelatedWork W1566544339 @default.
- W69393118 hasRelatedWork W1688394494 @default.
- W69393118 hasRelatedWork W1984808467 @default.
- W69393118 hasRelatedWork W2003445032 @default.
- W69393118 hasRelatedWork W2086769486 @default.
- W69393118 hasRelatedWork W2091343073 @default.
- W69393118 hasRelatedWork W2095598449 @default.
- W69393118 hasRelatedWork W2098114195 @default.
- W69393118 hasRelatedWork W2103877308 @default.
- W69393118 hasRelatedWork W2108516959 @default.
- W69393118 hasRelatedWork W2132328582 @default.
- W69393118 hasRelatedWork W2186632010 @default.
- W69393118 hasRelatedWork W2349190594 @default.
- W69393118 hasRelatedWork W2591821083 @default.
- W69393118 hasRelatedWork W2167669923 @default.
- W69393118 hasRelatedWork W2183882320 @default.
- W69393118 hasRelatedWork W2185272632 @default.
- W69393118 hasRelatedWork W2291087444 @default.
- W69393118 isParatext "false" @default.
- W69393118 isRetracted "false" @default.
- W69393118 magId "69393118" @default.
- W69393118 workType "dissertation" @default.