A Novel Transmitter and Receiver Structure for Cognitive Radio Based OFDM Systems

Jung-Sun UM  Sung-Hyun HWANG  Chang-Joo KIM  Byung Jang JEONG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.4   pp.1070-1071
Publication Date: 2011/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1070
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
WRAN,  cognitive radio,  transmission power,  diversity,  

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Summary: 
Wireless regional area network (WRAN) is intended to offer the fixed wireless access services using cognitive radio technology in the TV white space. Therefore, WRAN shall minimize the transmission power so that harmful interference is not imposed on the licensed users operating in the TV bands. In this paper, we propose a processing block that offers improvements in the SNR and diversity gain using the block to algebraically process two constellation symbols. Thus, the transmission power can be reduced by an amount equal to the gains. The simulation result shows that the proposed scheme has a better bit error performance than the transmission scheme defined in the IEEE 802.22 draft standard.