DocumentCode :
1715738
Title :
Adaptive SIMO and SDMA transmission mode for single carrier FDMA uplink
Author :
Wu, Hanguang ; Haustein, Thomas ; Venkatasubramanian, Venkatkumar
Author_Institution :
Nokia Siemens Networks, Munich
fYear :
2008
Firstpage :
1
Lastpage :
5
Abstract :
This paper is dedicated to better understanding of the achievable sum rate in the single carrier FDMA (SC-FDMA) system. We investigate the achievable sum rate in a two-user SC-FDMA system, where a mix of SIMO (single input multiple output) and SDMA (space division multiple access) transmission mode is assumed for the wideband communication. The problem is formulated which appears to be non-convex. Relation to the conventional waterfilling solution is pointed out for single mode (SIMO or SDMA) transmission. We show that a mix of SIMO and SDMA transmission mode in the wideband is not favorable for any pair of the user equipments. A better strategy would be to switch to SIMO mode or SDMA mode adaptively. We also propose a simple algorithm to find the group of users for SDMA mode based on the wideband average spatial correlation. Performance improvement is shown by combining adaptive SIMO mode and SDMA mode selection with our proposed user grouping algorithm.
Keywords :
broadband networks; frequency division multiple access; space division multiple access; adaptive single input multiple output; single carrier FDMA uplink; space division multiple access transmission mode; user grouping algorithm; waterfilling solution; wideband communication; Bandwidth; Binary phase shift keying; Discrete Fourier transforms; Diversity reception; Frequency division multiaccess; Multiaccess communication; Peak to average power ratio; Quadrature phase shift keying; Switches; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
Type :
conf
DOI :
10.1109/PIMRC.2008.4699821
Filename :
4699821
Link To Document :
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