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A channel cognitive wireless sensor system is proposed for low-power sensor network applications. Based on an RF spectrum sensing technology, the proposed receiver system is designed with channel-selective operation only for a valid input RF signal at a designated frequency channel. The new receiver architecture was implemented at the ISM band of 2.4–2.5 GHz. The system performance was evaluated by...
A channel cognitive super-regenerative receiver (SRR) system is proposed for low-power sensor network applications. Since the proposed system is designed based on the super-regeneration concept, the receiver is activated and yields the output demodulated signal only for valid incoming RF signals. While the super-regenerative oscillator (SRO) is designed with frequency tunability by a varactor diode,...
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