Local Oscillator Phase Noise Model for EVM Estimation and Optimization

Vitor Fialho, Fernando Fortes, Manuela Vieira

Research output: Contribution to journalReview articlepeer-review


This work presents a local oscillator (LO) phase noise model and its experimental validation for carrier to phase noise ratio (CPNR) and error vector magnitude (EVM) evaluation on a radio frequency (RF) transceiver. The proposed LO model is based on a type II charge pump phase locked loop with a combined phase noise source from the voltage controlled oscillator and input reference with a low pass characteristic. The obtained results of CPNR and signal to phase noise ratio are based on numerical simulations and validated with experimental measurements based on a commercial RF transceiver chip. The EVM of the transmitted RF channel is also measured and compared with CPNR.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalIETE Journal of Research
Issue number1
Publication statusPublished - 2017


  • Carrier to phase noise ratio
  • Charge pump phase lock loop
  • Error vector magnitude
  • Local oscillator
  • Phase noise
  • Signal to phase noise ratio


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