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학술대회 Impact of Non-idealities on the Performance of Delta-Sigma/Manchester-modulated Microwave Signals
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장승현, 공선우, 이희동, 박지훈, 김광선, 이광천
European Microwave Conference (EuMC) 2019, pp.1040-1043
19HH3200, 5G 이동통신용 밀리미터파(40GHz 이하) 빔포밍 부품 개발, 김광선
The effects of non-idealities including clock jitter, rise/fall-time mismatch of a pulse, and pulse-amplitude-level nonlinearity on conventional delta-sigma-only and Manchester/delta-sigma-modulated microwave signals are studied. According to the experimental and simulation results, the Manchester/delta-sigma scheme is more vulnerable to jitter than the conventional delta-sigma scheme due to the higher number of pulse transitions by Manchester codes. It is found that, however, because of the repetitive (or multi-pulse) nature, the Manchester/delta-sigma system shows better signal quality performance against a rise and fall time asymmetry. This is mainly because the Manchester pulse waveform is more similar to a return-to-zero format where every encoded bit has both rising and falling edges and is therefore immune to the waveform asymmetry.
KSP 제안 키워드
Microwave signal, Multi-pulse, Number of pulse, Signal quality, clock jitter, delta-sigma, fall time, non-idealities, pulse waveform, quality performance, return-to-zero(RZ)