Asymptotic bounds on the Optimum Multiuser Efficiency of randomly spread CDMA
Sedaghat MA, Müller R, Marvasti F (2014)
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2014
Publisher: IEEE Computer Society
Pages Range: 599-603
Article Number: 6850353
Event location: Hammamet
ISBN: 9783901882630
DOI: 10.1109/WIOPT.2014.6850353
Abstract
We derive some bounds on the Optimum Asymptotic Multiuser Efficiency (OAME) of randomly spread CDMA as extensions of the result by Tse and Verdú. To this end, random Gaussian and random binary antipodal spreading are considered. Furthermore, the input signal is assumed to be Binary Phase Shift Keying (BPSK). It is shown that in a CDMA system with K-user and N chips when K and N → 8 and the loading factor, K over N, grows logarithmically with K, the OAME converges to 1 almost surely under some condition. It is also shown that a Gaussian randomly spread CDMA system has a performance close to the single user system at high Signal to Noise Ratio (SNR) when the loading factor is kept less than log K over 2. Moreover, for random binary antipodal matrices, we show that the loading factor cannot grow faster than equation. © 2014 IFIP.
Authors with CRIS profile
Involved external institutions
NTNU Trondheim - Norwegian University of Science and Technology
Norway (NO)
Sharif University of Technology / دانشگاه صنعتی شریف (SUT)
Iran, Islamic Republic of (IR)
Norway (NO)
Sharif University of Technology / دانشگاه صنعتی شریف (SUT)
Iran, Islamic Republic of (IR)
How to cite
APA:
Sedaghat, M.A., Müller, R., & Marvasti, F. (2014). Asymptotic bounds on the Optimum Multiuser Efficiency of randomly spread CDMA. In Proceedings of the 2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014 (pp. 599-603). Hammamet: IEEE Computer Society.
MLA:
Sedaghat, Mohammad A., Ralf Müller, and Farokh Marvasti. "Asymptotic bounds on the Optimum Multiuser Efficiency of randomly spread CDMA." Proceedings of the 2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks, WiOpt 2014, Hammamet IEEE Computer Society, 2014. 599-603.
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