A four-channel CMOS front-end for interference-robust GNSS receiver

Fang Han, Jian Gao, Xiaoran Li*, Zhiming Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A four-channel receiver front-end is designed and implemented for interference-and jamming-robust global navigation satellite system (GNSS) in a 0.18-μm CMOS technology. The front-end consists of four identical RF-to-IF signal paths including low-noise amplifiers (LNAs), mixers and IF amplifiers. In addition, it also includes a phase-locked loop (PLL), which synthesizes the local oscillator (LO) signal, and a serial peripheral interface (SPI) for parameter adjustment. To improve the interference and jamming robustness, a novel linearity improvement technology and LO duty cycle adjustment method are applied in LNA and mixer design, respectively. The receiver achieves a gain of 40 dB, an input-referred third-order intercept point (IIP3) of −8 dBm and a jammer-to-signal power ratio (JSR) of 72 dB under 1.8-V and 3.3-V supply, while occupying a 4 × 5 mm2 die area including the electrostatic discharge (ESD) I/O pads.

Original languageEnglish
Article number291
JournalElectronics (Switzerland)
Volume9
Issue number2
DOIs
Publication statusPublished - Feb 2020

Keywords

  • CMOS
  • Duty cycle adjustment
  • GNSS
  • Wide-range derivative superposition

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Han, F., Gao, J., Li, X., & Chen, Z. (2020). A four-channel CMOS front-end for interference-robust GNSS receiver. Electronics (Switzerland), 9(2), Article 291. https://doi.org/10.3390/electronics9020291