By Topic

Semi-definite programming (SDP) relaxation based semi-blind channel estimation for frequency-selective MIMO MC-CDMA systems

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Venkategowda, N.K.D. ; Dept. of Electr. Eng., Indian Inst. of Technol. Kanpur, Kanpur, India ; Jagannatham, A.K.

In this paper, we propose a semi-definite programming (SDP) relaxation based semi-blind (SRSB) channel estimation scheme for frequency-selective multiple-input multiple-output (MIMO) multi-carrier code division for multiple access (MC-CDMA) systems. The SRSB scheme is derived from the multi-path multi-carrier decorrelator (MMD) based robust channel estimation framework developed for MIMO MC-CDMA. We formulate the semi-blind channel estimation scenario for MIMO MC-CDMA systems as a convex quadratic programming (QP) problem. Subsequently with an approximate rank relaxation this is recast as an equivalent SDP problem. Hence, the SDP solvers utilized in maximum likelihood MIMO symbol detection can be utilized to obtain the semi-blind channel estimate, thereby potentially enhancing the estimation performance without the need for additional computational resources. Simulation results demonstrate that the mean-squared error (MSE) performance of the SDP relaxation based semi-blind estimation is significantly superior compared to that of the conventional training based least-squares estimator.

Published in:

Signal Processing and Communications (SPCOM), 2012 International Conference on

Date of Conference:

22-25 July 2012