A 0.3 GHz to 1.4 GHz N-path mixer-based code-domain RX with TX self-interference rejection

@article{Agrawal2017A0G,
  title={A 0.3 GHz to 1.4 GHz N-path mixer-based code-domain RX with TX self-interference rejection},
  author={Abhishek Agrawal and Arun S. Natarajan},
  journal={2017 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)},
  year={2017},
  pages={272-275}
}
A code-domain N-path RX is proposed based on PN-code modulated LO pulses for concurrent reception of two code-modulated signals. Additionally, a combination of Walsh-Function and PN sequence is proposed to translate in-band TX self-interference (SI) to out-of-band at N-path RX output enabling frequency filtering for high SI rejection. A 0.3 GHz–1.4 GHz 65-nm CMOS implementation has 35 dB gain for desired signals and concurrently receives two RX signals while rejecting mismatched spreading codes… CONTINUE READING

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