CPFSK Scheme With Multiple Modulation Indices in Optical OFDM Communication System

Zhanyu Yang; Song Yu; Longquan Chen; Jian Li; Yaojun Qiao; Wanyi Gu

doi:10.1109/JPHOT.2013.2287563

IEEE Photonics Journal (Jan 2013)

CPFSK Scheme With Multiple Modulation Indices in Optical OFDM Communication System

Zhanyu Yang,
Song Yu,
Longquan Chen,
Jian Li,
Yaojun Qiao,
Wanyi Gu

Affiliations

Zhanyu Yang: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
Song Yu: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
Longquan Chen: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
Jian Li: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
Yaojun Qiao: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China
Wanyi Gu: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, China

DOI: https://doi.org/10.1109/JPHOT.2013.2287563
Journal volume & issue: Vol. 5, no. 6
pp. 7902607 – 7902607

Abstract

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To improve spectrum efficiency (SE) of minimum-shift keying (MSK) in orthogonal frequency-division multiplexing (OFDM) system, MSK is extended to a continuous-phase frequency-shift-keying (CPFSK) scheme with multiple modulation indices h in this paper. We theoretically prove that the available h for the proposed multiple- h OFDM-CPFSK scheme is only the multiple of 1/2. Subsequently, a simple triple- h OFDM-CPFSK scheme with h = 0, 1/2, 1 is demonstrated as an example of the proposed multiple- h OFDM-CPFSK scheme. In our proof-of-concept experiment, a 10-Gb/s triple- h OFDM-CPFSK signal and a 10-Gb/s OFDM-MSK signal are successfully transported over 1000-km standard single-mode fiber. Electrical spectrum shows that the SE of the triple- h OFDM-CPFSK scheme is about twice as much as that of OFDM-MSK. Bit-error-rate performance of the 10-Gb/s triple- h OFDM-CPFSK signal and the 10-Gb/s OFDM-MSK signal after 300- and 1000-km transmissions demonstrates a robust performance of the triple- h OFDM-CPFSK scheme in long-haul high-speed transmission.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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