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학술지 Digital Radio-over-fiber System with Multi-pulse Manchester Encoding-assisted Delta-sigma Modulation
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저자
장승현, 박봉혁, 홍성철
발행일
201704
출처
Optics Express, v.25 no.7, pp.8336-8349
ISSN
1094-4087
출판사
Optical Society of America(OSA)
DOI
https://dx.doi.org/10.1364/OE.25.008335
협약과제
16MF1200, (통합)초연결 스마트 서비스를 위한 5G 이동통신 핵심기술개발, 정현규
초록
Two ?붞?-modulated digital radio-over-fiber (DRoF) transmission systems that employ a multi-pulse Manchester encoder are proposed and experimentally evaluated. With a two-step modulation process comprised of ?붞? modulation and multi-pulse Manchester encoding, a high frequency replica or image of a ?붞?-digitized analog communication signal can be transmitted without significant power loss. This is achieved by exploiting the spectral characteristics of the modified Manchester code. For comparative analysis, a conventional ?붞?-modulation-based DRoF system is also evaluated. Based on the evaluation results, the proposed DRoF systems more significantly improve the reliability and flexibility of the RoF system by providing higher power margins or by making the DRoF system implementation more cost-effective and easier to perform on account of the low-frequency requirement for electronics and optical transceivers.
KSP 제안 키워드
Comparative analysis, Delta-Sigma Modulation, Digital radio, High Frequency(HF), Manchester code, Manchester encoder, Manchester encoding, Multi-pulse, Radio over fiber(ROF), Radio-over-fiber system, RoF system