© The Institution of Engineering and Technology
A self-tuned surface acoustic wave (SAW)-less global navigation satellite system (GNSS) receiver is proposed. In the self-tuning mode, the radio-frequency amplifier (RFA) is configured as an oscillator and the receiver chain is reused to realise a simple self-calibration. In the normal operation, the RFA works as a Q-enhanced radio-frequency filter to remove the out-of-band blockers. A gain-irrelevant DC offset cancellation is also presented. This GNSS receiver achieves 4.8 dB noise figure and a rejection of 25.8 and 31.8 dB for DCS (1710 MHz) and PCS (1850 MHz) blockers, while consuming <5 mA current from a 1.7 V supply.
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A blocker filtering technique for SAW-less wireless receivers.
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2015.0170
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Self-tuned SAW-less GNSS receiver front end with blocker filtering and gain-irrelevant DC offset cancellation