Interference-Minimizing Code Assignment for Cognitive Underlay CDMA Systems
Mon, 04/10/2010 - 15:36 | 
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Thesis Title:
Interference-Minimizing Code Assignment for Cognitive Underlay CDMA Systems
Name:
Mohamed Tawfeek Kashef Hany
Date of Birth:
Sat, 01/09/1984
Nationality:
Egyptian
E-mail:
Degree:
Master
Previous Degrees:
B.Sc. (ELC) 2006 - Cairo
Registration Date:
Sun, 01/10/2006
Awarding Date:
Tue, 14/07/2009
Supervisors:
External Supervisors:
Dr. El-Ezabi, A. Y.
Examiners:
Dr. Sourour, E. A.
Dr. Nafie, M. H.
Dr. Khairy, M. M.
Key Words:
CDMA, Underlay, Cognitive radio, Code assignment, IMCA
Summary:
In this thesis we propose a code-division multiple-access (CDMA) secondary
network to operate cognitively as an underlay for a primary network. A novel
interference-minimizing code assignment (IMCA) for secondary users is
proposed such that the interference from existing primary and secondary users is
minimized. We propose a method for blind epoch acquisition by processing the
covariance matrix of the received signal. Also, we propose a framework for
designing an underlay secondary CDMA network. We propose a slightly
modified minimum-output energy receiver that operates semi-blindly.
