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Performance Analysis of Fractional Bandwidth Mode Detection for a Cognitive Radio Based OFDM System  

Lee, Ji-Hye (경희대학교 전자전파공학과)
Wang, Jin-Soo (경희대학교 전자전파공학과)
Kim, Yun-Hee (경희대학교 전자전파공학과)
Yoon, Seok-Ho (성균관대학교 정보통신공학부)
Song, Lick-Ho (한국과학기술원 전기 및 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.2C, 2010 , pp. 238-245 More about this Journal
Abstract
For orthogonal frequency division multiplexing (OFDM) systems sharing the spectrum with narrow band primary devices, a fractional bandwidth (FBW) mode has been proposed recently to reduce the interference to the primary users. The FBW mode divides the total OFDM bandwidth into subbands and activates (or deactivates) a subset of the subbands according to the result of spectrum sensing. In this paper, we analyze the detection error probability of FBW mode information which is delivered by the sequence embedded in the preamble and evaluate the performance in wireless regional area network environments. The results show that the detection probability derived analytically estimates the actual value from simulation adequately and that a low detection error probability less than $10^{-3}$ is obtained at a low signal-to-noise power ratio.
Keywords
Detection probability; OFDM; Fractional bandwidth mode; Cognitive radio; WRAN;
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Times Cited By KSCI : 1  (Citation Analysis)
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