Multirate systems and filter banks
Multirate systems and filter banks
Multirate Signal Processing for Communication Systems
Multirate Signal Processing for Communication Systems
On Detecting White Space Spectra for Spectral Scavenging in Cognitive Radios
Wireless Personal Communications: An International Journal
Generic Software Framework for Adaptive Applications on FPGAs
FCCM '09 Proceedings of the 2009 17th IEEE Symposium on Field Programmable Custom Computing Machines
Multicarrier communication techniques for spectrum sensing and communication in cognitive radios
IEEE Communications Magazine
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This paper presents a brief tutorial and background on implementing filter banks for spectrum sensing. It discusses the advantages of this approach over standard FFT-based spectral estimation. A general architecture for implementation of filter banks on FPGAs is then presented, exploiting heterogeneous resources. It takes advantage of the fact that subband filters run at a reduced sample rate, and hence can share the same computational resources. We show how to facilitate this sharing of resources by saving state for each subband. The architecture is fully reconfigurable, allowing sensing parameters to be changed at runtime. Resource usage figures are given, showing the efficiency of the architecture. We finally discuss how this architecture can be adapted to signal reception.