Title :
Interference reduction in CDMA channels: A statistical-mechanics approach
Author :
Tanaka, Toshiyuki ; Kitagawa, Kouichiro
Author_Institution :
Grad. Sch. of Inf., Kyoto Univ., Kyoto
Abstract :
Statistical mechanics-based approach to studying wireless communication systems is useful not only in analyzing theoretical performance of a given model, but also in optimizing design of a class of system models. In this paper, we demonstrate usefulness of statistical-mechanics approach in the problem of optimizing a spreading sequence set of randomly-spread code-division multiple-access (CDMA) communication systems. It has been shown that the optimal spreading sequences of a randomly spread CDMA channel in the large-system limit are Welch-bound-equality sequence sets, even when a non-Gaussian input distribution is assumed.
Keywords :
Gaussian distribution; code division multiple access; interference suppression; optimisation; random sequences; set theory; statistical mechanics; wireless channels; CDMA channel; Welch-bound-equality sequence set; interference reduction; nonGaussian input distribution; randomly-spread code-division multiple-access communication system; spreading sequence set optimization; statistical-mechanics approach; wireless communication system; AWGN; Communication systems; Electromagnetic scattering; Femtocell networks; Interference; Mathematical model; Mobile communication; Multiaccess communication; Vectors; Wireless communication;
Conference_Titel :
Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks and Workshops, 2008. WiOPT 2008. 6th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
978-963-9799-18-9
Electronic_ISBN :
978-963-9799-18-9
DOI :
10.1109/WIOPT.2008.4586145
