Comparison of Nonquiet Spectrum Sensing in Filter Bank Multicarrier and OFDM Based Cognitive Radio Systems
Publish place: 21th Iranian Conference on Electric Engineering
Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ICEE21_674
تاریخ نمایه سازی: 27 مرداد 1392
Abstract:
Filter bank multicarrier (FBMC) and orthogonal frequency division multiplexing (OFDM) have been recognized as two physical layer (PHY) candidates for Cognitive Radio(CR) systems. Spectrum sensing plays an important role in a CR in order to detect spectrum opportunities. It is usually moredesirable to perform spectrum sensing without additional hardware. In this paper, a comparison between performance of filter bank-based (FB-based) and fast Fourier transform-based (DFT-based) energy detectors (EDs) is presented. These methods are used in FBMC and OFDM PHYs with a slight modificationto the hardware, respectively. For this comparison the area under the receiver operating characteristic (ROC) curve namelyAUC is considered as a criterion. Moreover, the performance comparison is conducted under the condition that secondary users (SUs) continue their transmission even in the sensing period. As a result, the SU which is performing primary user (PU) detection receives the interference from SUs. This is callednonquiet sensing. The results indicate that although DFT-based ED is less complex, FB-based ED's performance is much better than DFT-based ED in heavy interference environment
Authors
Afrooz Jalali
Isfahan University of Technology
Hamid Saeedi-Sourck
Yazd University