Precoding with interference suppression sequence scheme for OFDM-based cognitive radio systems |
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| Authors: | ZHAO Cheng-lin ZHANG Kun SUN Xue-bin JIANG Ting Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts Telecommunications Beijing China |
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| Affiliation: | ZHAO Cheng-lin,ZHANG Kun,SUN Xue-bin,JIANG Ting Key Laboratory of Universal Wireless Communication,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,China |
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| Abstract: | Orthogonal frequency division multiplexing(OFDM)is considered to be one of the promising schemes for cognitive radios(CR)systems,due to its flexibility in spectrum shaping.However,the traditional way of spectrum-notching failed to suppress out-of-band leakage enough,resulting in interference with licensed users(LUs).A novel spectrum shaping scheme is proposed in this article,where a precoder with interference suppression sequence(ISS)is for the first time introduced for shaping the spectrum of OFDM signals ... |
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| Keywords: | OFDM cognitive radio precoding spectrum shaping |
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