Paper Title :Bit Error Rate (BER) Performance Analysis Of Carrier Interferometry Codes In A Cognitive Radio (Cr) Environment
Author :Anupama Ramesh Hegde
Article Citation :Anupama Ramesh Hegde ,
(2014 ) " Bit Error Rate (BER) Performance Analysis Of Carrier Interferometry Codes In A Cognitive Radio (Cr) Environment " ,
International Journal of Advance Computational Engineering and Networking (IJACEN) ,
pp. 10-15,
Volume-2,Issue-7
Abstract : Multi Carrier Code Division Multiple Access (MC-CDMA) and Orthogonal Frequency Division Multiplexing
(OFDM) are the two most efficient multiple access techniques in a multiuser environment. However, Multiuser Interference
(MUI) and Co-Space Interference (CSI) are the two major challenges when multiple antennas are deployed at the transmitter
and receiver ends. Moreover, in a Cognitive Radio (CR) system, the secondary users that use MC-CDMA technique must
deactivate the sub carriers used by the primary users resulting in the loss of orthogonality of the conventional spreading
codes such as Hadamard Walsh codes. To solve the resultant non-orthogonality problem, the Complex Carrier
Interferometry (CI) codes are utilized that exist for any length. The method of Total Interference Cancellation (TIC) in
combination with Singular Value Decomposition (SVD) helps to combat the problem of MUI and CSI. However, the
performance of these CI codes deteriorates due to small singular values of the channel matrix. To enhance the performance
of CI-TIC, Minimum Output Energy (MOE) error criterion is employed to reduce the noise.
Type : Research paper
Published : Volume-2,Issue-7
DOIONLINE NO - IJACEN-IRAJ-DOIONLINE-976
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Copyright: © Institute of Research and Journals
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Published on 2014-07-01 |
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