IET Signal Processing, ( ISI ), Volume (8), No (2), Year (2014-2) , Pages (158-166)

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

Authors: Farid Samsami Khodadad , Ghosheh Abed Hodtani ,

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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.

Keywords

, channel order, the number of active users , code, division multiple, access multi, path
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@article{paperid:1038214,
author = {Samsami Khodadad, Farid and Abed Hodtani, Ghosheh},
title = {Blind joint estimation of channel order and the number of active users in direct sequence code-division multiple-access multi-path channels},
journal = {IET Signal Processing},
year = {2014},
volume = {8},
number = {2},
month = {February},
issn = {1751-9675},
pages = {158--166},
numpages = {8},
keywords = {channel order-the number of active users - code-division multiple-access multi-path channels},
}

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%0 Journal Article
%T Blind joint estimation of channel order and the number of active users in direct sequence code-division multiple-access multi-path channels
%A Samsami Khodadad, Farid
%A Abed Hodtani, Ghosheh
%J IET Signal Processing
%@ 1751-9675
%D 2014

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