Performance analysis of overlap FFT filter-bank for dynamic spectrum access applications

An OFDMA-based channel access scheme for dynamic spectrum access has drawbacks of large PAPR (Peak to Average Power Ratio) and large ACI (Adjacent Channel Interference). To solve these problems, a new flexible channel access scheme using overlap FFT filter-bank was proposed based on single carrier modulation for dynamic spectrum access. It is necessary to establish the design methodology of the overlap FFT filter-bank since ACI is critical for dynamic spectrum access. This paper analyzes the performance of the overlap FFT filter-band for dynamic spectrum access applications and confirms it by computer simulations. Furthermore, ACI performance of the overlap FFT filter-bank is evaluated.