Local Oscillator Phase Noise Impact on M-ary Modulation Schemes
Vítor Fialho1, Fernando Fortes2

1Vitor Fialho, DEETC, Instituto Superior de Engenharia de Lisboa and Centre of Technology and Systems, Lisbon, Portugal.
2Fernando Fortes, DEETC, Instituto Superior de Engenharia de Lisboa and Instituto de Telecomunicações, Lisbon, Portugal.
Manuscript received on 30 September 2022 | Revised Manuscript received on 05 October 2022 | Manuscript Accepted on 15 October 2022 | Manuscript published on 30 October 2022 | PP: 41-46 | Volume-11 Issue-11, October 2022 | Retrieval Number: 100.1/ijitee.K930210111122 | DOI: 10.35940/ijitee.K9302.10111122
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Abstract: This paper presents the impact of a local oscillator phase noise on digital modulation schemes based on bit error rate and error vector magnitude. The adopted methodology enables base band metrics estimation which is dependent of a specific communication standard. A generic local oscillator phase noise model is presented to evaluate the impact of different phase noise values on error vector magnitude and bit error rate. For a phase noise of -65dBc @ 1kHz the error vector magnitude changes from 7% to 12.8%. Increasing the modulation order leads to bit error rate increment for the same phase noise value. 
Keywords: Phase Noise, Digital Modulation, IQ Scatter, BER, EVM. 
Scope of the Article: Digital Modulation