| IP개요 |
In this paper, the time-interleaved and channelized spectrum sensing receiver employing a reconfigurable doublebalanced and sub-harmonic down-conversion mixer is proposed to reduce the hardware complexity while maintaining fast sensing time. The proposed mixer is the passive type and supports three modes of fIF=|fRF -2fLO| (2fLO down-conversion mode), fIF=|fRF -fLO| (fLO down-conversion mode), and fIF=|fRF| (by-pass mode) according to the digital control signal, where fRF, fLO, and fIF are the frequency of RF, LO, and IF. This operation enables a time-interleaved channelization with fast sensing time by switching the operation modes of the RF circuits instead of varying the LO frequency and as a result simplifies the hardware configuration of the conventional channelized spectrum sensing receiver. |
