A 60-GHz highly reused joint radar– communication transceiver with reconfigurable dual-mode gilbert cells in 65-nm CMOS
Résumé
A 60-GHz joint radar-communication (JRC) transceiver is introduced in this paper. Benefiting from a reconfigurable dual-mode Gilbert cell which could not only operate as an up-conversion mixer for the baseband signal but could also be configured as an amplifier for the LO signal, a highly-reused JRC transceiver architecture is realized. In the radar mode, instead of utilizing the narrow-band IF chirp modulation scheme which is widely adopted in previous JRC systems, in this work a wideband chirp generated directly from the LO chain could be applied for both transmitting and direct RF de-chirping, thereby significantly improving the range resolution and relieving the hardware burden in radar signal processing. Fabricated in a 65-nm CMOS process, this work achieves a 16-dBm saturated TX output power, an 11-dBm OP1dB, and a 5.8-dB minimum RX noise figure (NF). Experiments demonstrate that the proposed JRC transceiver supports >7 Gb/s data rate in the 16-QAM over-the-air (OTA) communication, as well as >4 GHz transmitted chirp bandwidth with <3.75 cm range resolution in the radar mode.
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