An oversampled filter bank multicarrier system for Cognitive Radio

Due to small sideband power leakage, filter bank multicarrier techniques are considered as interesting alternatives to traditional OFDMs for spectrum pooling cognitive radio. In this paper, we propose an oversampled filter bank multicarrier system for cognitive radio. The increased spacing between adjacent subcarriers in the oversampled filter bank multicarrier system largely reduce the intercarrier interference, the key limitation of the OFDM based cognitive radio. The proposed multicarrier system is compared with OFDM for BER performance and sideband power rejection. Design tradeoffs of the major parameters of the oversampled filter bank will be discussed. We also suggest a fast implementation of the proposed filter bank modulation based on generalized DFT filter bank model, followed by a computational complexity analysis.