| Title | A Mitigation Technique for Harmonic Downconversion in Wideband Spectrum Sensors |
| Publication Type | Journal Article |
| Year of Publication | 2015 |
| Authors | Khatri, V, Banerjee, G |
| Journal | IEEE Transactions on Instrumentation and Measurement |
| Volume | 64 |
| Pagination | 3226-3238 |
| Date Published | Dec |
| ISSN | 0018-9456 |
| Keywords | Algorithm design and analysis, CMOS integrated circuits, CMOS technology, cognitive radio, Cognitive Radios, Harmonic analysis, harmonic downconversion, integrated spectrum sensors, local oscillator, mitigation technique, Mixers, multiband radio frequency (RF) systems, multiple parallel downconverters, Oscillators, Radio frequency, radio frequency components, size 130 nm, Spectrum sensing receivers, spectrum sensing receivers., system architecture, white space detection, Wideband, wideband spectrum sensors |
| Abstract | The down conversion of radio frequency components around the harmonics of the local oscillator (LO), and its impact on the accuracy of white space detection using integrated spectrum sensors, is studied. We propose an algorithm to mitigate the impact of harmonic downconversion by utilizing multiple parallel downconverters in the system architecture. The proposed algorithm is validated on a test-board using commercially available integrated circuits and a test-chip implemented in a 130-nm CMOS technology. The measured data show that the impact of the harmonic downconversion is closely related to the LO characteristics, and that much of it can be mitigated by the proposed technique. |
| DOI | 10.1109/TIM.2015.2469415 |
