An Efficient Filter Banks Based Multicarrier System in Cognitive Radio Networks
In cognitive radio techniques, OFDM is usually regarded as the physical layer candidate. However, the weaknesses of the OFDM technique, i.e., using plain FFT for spectral analysis, decreased bandwidth efficiency due to CP (Cyclic Prefix), high out-of-band emission, have been pointed out and the introduction of Filter Banks Based Multicarrier (FBMC) system has been advocated by a number of authors. In this paper, the authors propose an efficient FBMC system for cognitive radio network. At the transmitter, they propose decimation transform decomposition method to eliminate the unnecessary zero operations.