An LTV analysis of the frequency translational noise-cancelling receiver

David Murphy, Ahmad Mirzaei, Hooman Darabi, Mau-Chung Chang, Asad Abidi

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The recently proposed Frequency-Translational Noise-Cancelling receiver demonstrates exceptional out-of-band linearity, a low noise factor, and wideband operation. Fundamental to the receiver's performance is the use of two passive-mixer-based downconversion paths, which delays noise-cancelling until after baseband filtering. As a result, voltage gain at blocker frequencies can be avoided, but the benefits of noise cancelling (i.e., wideband operation and low noise) can be retained. Although a simplified LTI analysis is sufficient to understanding the basic noise properties of the system, such an analysis cannot yield accurate closed-form expressions because it neglects the many signal and noise folding terms introduced by the two passive mixers. In this work, a complete LTV analysis is presented, which accurately captures both the gain and noise performance of the noise-cancelling receiver. Simulation results verify the analysis.

Original languageEnglish
Article number6555948
Pages (from-to)266-279
Number of pages14
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number1
StatePublished - 1 Jan 2014


  • Blocker-tolerant
  • CMOS
  • harmonic-rejection
  • highly-linear
  • low-noise
  • noise-cancelling
  • receiver
  • software-defined-radio (SDR)
  • wideband

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