標題: Design of reduced-rank MMSE combiner in asynchronous MC-DS-CDMA
作者: Hwang, Chien-Hwa
Chien, Feng-Tsun
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 2008
摘要: In this paper, we consider the design of a reduced-rank minimum mean-squared error (MMSE) combiner in an asynchronous multicarrier-direct sequence-code division multiple access (MC-DS-CDMA) system. It is shown that the combiner weights are related to quantities whose expressions resembles the eigenvalue moments of the interference autocorrelation matrix. To lift the burden of recomputing the weights from time to time, the weights are evaluated in a large system regime and averaged over random parameters including asynchronous delays, correlated fading coefficients and spreading sequences. Explicit expressions for the asymptotic weights of the MMSE combiner are derived. The large system setting is with the spreading gain N and user number K approaching infinity, but K/N = beta and the number of sub-carriers both finite.
URI: http://dx.doi.org/10.1109/ICC.2008.269
http://hdl.handle.net/11536/135048
ISBN: 978-1-4244-2074-2
ISSN: 1550-3607
DOI: 10.1109/ICC.2008.269
期刊: 2008 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, PROCEEDINGS, VOLS 1-13
起始頁: 1388
結束頁: +
Appears in Collections:Conferences Paper