TY - JOUR
T1 - Building an on-chip spectrum sensor for cognitive radios
AU - Sadhu, Bodhisatwa
AU - Sturm, Martin
AU - Sadler, Brian M.
AU - Harjani, Ramesh
PY - 2014/4
Y1 - 2014/4
N2 - Next generation cognitive radio networks require an RF and mixed signal hardware architecture that can achieve low-energy, very wideband spectrum sensing. We survey state-of-the-art low-power CMOS building blocks as potential candidates for realizing such an architecture. For the critical analog-to-digital converter, we compare time-interleaved and frequency-interleaved architectures, including system-level simulations, and frequency-interleaving is shown to provide significant advantages. Measurement results from a 3.8 mW 5 GHz bandwidth analog domain frequency interleaver are presented to confirm the possibility of a very low-energy frequency domain digitizer. Coupled with DSP for calibration and signal feature extraction, this architecture has significant promise for cognitive spectrum sensing.
AB - Next generation cognitive radio networks require an RF and mixed signal hardware architecture that can achieve low-energy, very wideband spectrum sensing. We survey state-of-the-art low-power CMOS building blocks as potential candidates for realizing such an architecture. For the critical analog-to-digital converter, we compare time-interleaved and frequency-interleaved architectures, including system-level simulations, and frequency-interleaving is shown to provide significant advantages. Measurement results from a 3.8 mW 5 GHz bandwidth analog domain frequency interleaver are presented to confirm the possibility of a very low-energy frequency domain digitizer. Coupled with DSP for calibration and signal feature extraction, this architecture has significant promise for cognitive spectrum sensing.
UR - http://www.scopus.com/inward/record.url?scp=84900431719&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84900431719&partnerID=8YFLogxK
U2 - 10.1109/MCOM.2014.6807952
DO - 10.1109/MCOM.2014.6807952
M3 - Article
AN - SCOPUS:84900431719
SN - 0163-6804
VL - 52
SP - 92
EP - 100
JO - IEEE Communications Magazine
JF - IEEE Communications Magazine
IS - 4
M1 - 6807952
ER -