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Cognitive-engined spectrum-fragmented synchronous MC-CDMA based on generalized hadamard codes
, Article 2015 IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2015, 9 March 2015 through 12 March 2015 ; March , 2015 , Pages 159-163 ; 9781479987603 (ISBN) ; Khojasteh, M. J ; Poursaeed, O ; Salehi, J. A ; Sharif University of Technology
Institute of Electrical and Electronics Engineers Inc
2015
Abstract
In Cognitive Radio (CR), in order to avoid interference in the Primary Users (PU), some subcarriers need to be deactivated. In systems based on Multicarrier Code Division Multiple Access (MC-CDMA), this causes losing orthogonality among different spreading codes, leading to poor Bit Error Rate (BER) performance. The performance of such system can be improved by using Generalized Hadamard Codes (GHC) instead of conventional Hadamard codes which avoids the loss of orthogonality. This is due to the fact that unlike conventional Hadamard codes, GHC are conjectured to exist for any arbitrary length. In this paper, we propose using a novel spreading code, namely, GHC for synchronous MC-CDMA in CR...