- 期刊
- OpenAccess
Amended (Wavelet) Multiband OFDM Cognitive Radio System
並列摘要
This study focuses on improving the functioning of multiband Orthogonal Frequency Division Multiplexing (OFDM) system by utilizing wavelet transform as a substitute to Fast Fourier Transform (FFT). The performance is further refined by apt inclusion of modulation technique. Error control codes are utilized which aims at the removal of error from the transmitted bits. In addition to attain diversity Alamouti code is concatenated with error control codes. OFDM is the best fit for cognitive radio and sensing the free holes is the key task of any cognitive system. This study additionally also analyses the performance of energy detection based spectrum sensing in the presence of various noise models.
延伸閱讀
- Chiu, T. S. (2010). An Optimal Multiband Spectral Detector in Cognitive Radios [master's thesis, National Tsing Hua University]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0016-2203201110481217
- Raghave, S., Saravanan, R., & Muthaiah, R. (2014). Continuous Wavelet Transform Based Spectrum Sensing in Cognitive Radio. Research Journal of Applied Sciences, Engineering and Technology, 7(5), 986-988. https://www.airitilibrary.com/Article/Detail?DocID=20407467-201402-201506290029-201506290029-986-988
- Yang, C. K. (2011). Energy-Saving Discrete Wavelet Packet Transform Based Processor for Spectrum Sensing in Cognitive Radio [master's thesis, National Tsing Hua University]. Airiti Library. https://www.airitilibrary.com/Article/Detail?DocID=U0016-1908201112580607
- Tu, S. Y. (2007). Spectrum Sensing of OFDMA Systems for Cognitive Radios [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2007.01907
- Lai, G. L. (2009). A Spectrum Sensing Scheme in Wideband OFDM Cognitive Radios [master's thesis, National Tsing Hua University]. Airiti Library. https://doi.org/10.6843/NTHU.2009.00573