A New Flexible Filter Bank for Low Complexity Spectrum Sensing in Cognitive Radios

作者：Lin Mengda; Vinod A P^*; See Chong Meng Samson

来源：Journal of Signal Processing Systems for Signal Image and Video Technology, 2011, 62(2): 205-215.

DOI：10.1007/s11265-008-0329-9

• Spectrum sensing
• Wireless communications
• Discrete fourier transform filter bank
• Coefficient decimation filter bank

Conventional filter bank-based spectrum sensing methods employ uniform discrete Fourier transform filter bank (DFTFB). In this paper, we propose a multi-stage coefficient decimation filter bank (MS-CDFB) for wideband spectrum sensing in cognitive radios. From an initial fixed-coefficient modal filter, a filter bank that has multiple passbands of either uniform or different passband widths can be obtained using coefficient decimation. Design examples show that proposed MS-CDFB offers a complexity reduction of about 30% over the DFTFB while giving a superior sensing accuracy than the latter. The complexity reduction of MS-CDFB over the DFTFB is 85%, if both the spectrum sensors are designed to produce identical sensing accuracies.

• 出版日期2011-2
• 单位南阳理工学院