NDLI: Blind joint estimation of channel order and the number of active users in direct sequence code-division multiple-access multi-path channels

Content Provider	IET Digital Library
Author	Khodadad, Farid Samsami Hodtani, Ghosheh Abed
Abstract	A new, reliable and computationally efficient blind method is proposed for joint estimation of channel order and number of active users in a direct sequence code-division multiple-access system with multi-path fading channel. The proposed method (i) exploits a parametric model used for equalisation of multi-path channels in finite impulse response multi-input multi-output systems, (ii) first, estimates rank of correlation matrix of observation, by combining the subspace method and information-theoretic criteria, (iii) then, estimates simultaneously channel order and number of active users, by using the estimated rank and the model parameter, without any prior information, (iv) uses only a single antenna, in contrast to the previous methods, while having the ability to jointly estimate higher numbers of active users and channel order in lower signal-to-noise ratios. Numerical results show that the proposed method can estimate higher number of users and also has higher detection probability when using minimum mean square error algorithm.
Starting Page	158
Ending Page	166
Page Count	9
ISSN	17519675
Volume Number	8
e-ISSN	17519683
Issue Number	Issue 2, Apr (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/8/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2012.0296
Journal	IET Signal Processing
Publisher Date	2013-08-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Blind Joint Estimation Channel Order Code Division Multiple Access Direct Sequence Code-division Multiple-access Multi-path Channel Equalisation Estimation Theory Finite Impulse Response Least Mean Squares Method MIMO Communication Minimum Mean Square Error Algorithm Multi-input Multi-output System Multipath Channel Multiple Access Communication Parametric Model Radio Link And Equipment Statistics
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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