{"id":639,"date":"2019-12-09T14:41:56","date_gmt":"2019-12-09T22:41:56","guid":{"rendered":"https:\/\/www.ece.ucdavis.edu\/hsics\/?page_id=639"},"modified":"2019-12-09T14:41:56","modified_gmt":"2019-12-09T22:41:56","slug":"rfic-combating-interference-and-self_interference","status":"publish","type":"page","link":"https:\/\/www.ece.ucdavis.edu\/hsics\/rfic-combating-interference-and-self_interference\/","title":{"rendered":"RFIC Combating Interference and Self_Interference"},"content":{"rendered":"

Simultaneous Transmitting and Receiving (STAR) operations will benefit a variety of applications and boost communication efficiency. To enable STAR operations, one of the key enabling components is a highly linear transmitter with low noise and leakage to other channels and the receiving band. Besides, system robustness over PVTs are also highly demanded, which impedes the wide deployment of a majority of existing lineariztion technologies for STAR operations.\u00a0 To enable STAR operations, we are investigating a new linearization scheme, Cartesian Error Feedback Transmitter (CEFTx) architecture by introducing a feed-forward path to cancel the signal before feedback, therefore alleviating the linearity-noise trade-offs inherent in conventional Cartesian Feedback Transmitters.<\/p>\n

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Figure above presents some of the work related to this research effort, with the particular highlight of the first presentation of low noise Cartesion loop transmitter which demonstrates better than -131 dBm\/Hz noise density at 100 MHz offset while enjoying the high linearity and robustness versus PVT changes.<\/p>\n

Publications<\/b><\/span><\/p>\n

    \n
  1. J. Li, R. Shu, Z. Xu, and Q. J. Gu, \u201cA 21dm-OP1dB 20.3%-Efficiency -131.8dBm\/Hz-Noise X-band Cartesian-Error-Feedback Transmitter with Fully Integrated Power Amplifier in 65nm CMOS,\u201d Accept JSSC, Nov. 2019<\/li>\n
  2. J. Li, R. Shu, Q. J. Gu, \u201cAn 8.5-11 GHz CMOS Transmitter with >19 dBm OP1dB and 24 % Efficiency,\u201d IEEE CICC 2019<\/li>\n
  3. Jinbo Li, Zhiwei Xu, Q. J. Gu, \u201cA 21-dBm OP1dB 20.3%-Efficiency -131.8dBm\/Hz-Noise X-band Cartesian Error Feedback Transmitter with Fully Integrated Power Amplifier in 65nm CMOS,\u201d IEEE ISSCC2019<\/li>\n
  4. J. Li, and Q. J. Gu, \u201cHarmonic-Based Nonlinearity Factorization of Switching Behavior in Up-Conversion Mixers,\u201d IEEE Transactions on Circuits and Systems I, March 2019<\/li>\n
  5. M. N. Hasan, S. Saeedi, Q J Gu, H. H. Sigmarsson, and X. Liu \u201cDesign Methodology of N-Path Filters With Adjustable Frequency, Bandwidth, and Filter Shape\u201d IEEE Transactions on Microwave Theory and Techniques, March 2018<\/li>\n
  6. Jinbo Li and Q. J. Gu \u201cA 10 GHz Up-conversion Mixer with 13.6 dBm OIP3 Using Regulator-based Constant Gm Stage and Harmonic Nulling,\u201d 2018 IMS Student Paper Finalist<\/strong><\/li>\n
  7. J. Li, Z. Xu,W. Hong, and Q. J. Gu, \u201cA Cartesian Error Feedback Architecture\u201d IEEE IEEE Transactions on Circuits and Systems I, November 2017<\/li>\n
  8. J. Li and Q. J. Gu, \u201cA Low-Noise Cartesian Feedback Architecture,\u201d 2017 IEEE International Symposium on Circuits and Systems ISCAS2017<\/li>\n
  9. J. Li and Q. J. Gu, \u201cA Systematic Coupling Balance Scheme to Enhance Amplitude and Phase Matches for Long Traveling N-Pair Differential Signals,\u201d IEEE International Microwave Symposium IMS2017<\/li>\n
  10. J. Li, R. Shu, and Q. J. Gu, \u201cA Fully-Integrated Cartesian Feedback Loop Transmitter in 65nm CMOS,\u201d IEEE International Microwave Symposium IMS2017 Advanced Practice Paper Finalist<\/strong><\/li>\n
  11. M. Naimul Hasan, Q. J. Gu, and X. Liu, \u201cTunable Blocker-Tolerant On-chip RF Front-end Filter with Dual Adaptive Transmission Zeros for Software Defined Radio Applications,\u201d IEEE Transactions on Microwave Theory and Techniques, pp. 4419-4533, vol.64, no. 12, Dec. 2016<\/li>\n
  12. M. Naimul Hasan, Q. J. Gu, and X. Liu, \u201cTunable Blocker-Tolerant RF Front-end Filter with Dual Adaptive Notches for Reconfigurable Receiver, \u201c IEEE International Microwave Symposium 2016<\/li>\n
  13. J. Li, R. Shu and Q. J. Gu, “10GHz CMOS Hybrid Reflective Type Phase Shifter with Enhanced Phase Shifting Range,” IET Electronic Letters, vol. 51, no. 23, pp. 1935-1937, November 2015<\/li>\n
  14. J. Li, R. Shu, and Q. J. Gu, \u201cPassive Interferometer for Wideband and Linear Transmitter Leakage Cancellation,\u201d 2015 IEEE Asian Pacific Microwave Conference APMC Best Student Paper Award<\/strong><\/li>\n
  15. Md. N. Hasan, Q. J. Gu, and X. Liu, \u201cReconfigurable Blocker-Tolerant RF Front-end Filter with Tunable Notch for Active Cancellation of Transmitter Leakage in FDD Receivers,\u201d 2016 IEEE International Symposium on Circuits and Systems (ISCAS), Student Paper Finalist<\/strong><\/li>\n
  16. Z. Xu, D. Winklea, T. C. Oh, S. Kim, S. T.W. Chen, Y. Royter, M. Lau, I. Valles, D. A. Hitko, J. C. Li, Q. J. Gu, \u201c0.8\/2.4 GHz Programmable Active Band Pass Filters in InP\/Si BiCMOS Technology,\u201d IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 4, pp. 1219-1227, April 2015<\/li>\n
  17. Q. J. Gu and Z. Gao, \u201cA CMOS High Speed Multi-Modulus Divider with Retiming for Jitter Suppression,\u201d IEEE Microwave and Wireless Components Letters, vol. 23, no.10, pp.554-556, October 2013<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Simultaneous Transmitting and Receiving (STAR) operations will benefit a variety of applications and boost communication efficiency. To enable STAR operations, one of the key enabling components is a highly linear transmitter with low noise and leakage to other channels and the receiving band. Besides, system robustness over PVTs are also \u2026 Continue reading → <\/span><\/a><\/p>\n","protected":false},"author":13,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-639","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/pages\/639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/comments?post=639"}],"version-history":[{"count":0,"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/pages\/639\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ece.ucdavis.edu\/hsics\/wp-json\/wp\/v2\/media?parent=639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}