首页|Low-resolution Kramers-Kronig detection system with error-feedback noise shaping

Low-resolution Kramers-Kronig detection system with error-feedback noise shaping

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In this paper,we investigated the effects of error-feedback noise shaping(EFNS)on a low-resolution Kramers-Kronig(KK)detection system for the first time.Both 16-ary quadrature amplitude modulation(16-QAM)and 64-ary quadrature amplitude modulation(64-QAM)were considered in the ex-periment.The carrier tone was added on the transmitter side using the virtual carrier-assisted single sideband(VCA-SSB)method to meet the minimum phase(MP)condition.Under the MP condition,KK detection only needs the intensity of the optical signal to be detected by one photodiode(PD)to retrieve the phase information.However,the virtual carrier tone increases the carrier-to-signal power ratio(CSPR),which results in a high peak-to-average power ratio(PAPR)at the transmitter,causing an increase in quantization noise.To mitigate quantization noise in the low-resolution KK detection system,EFNS was applied.The application of EFNS increased the optimal CSPR of the KK detection system and improved receiver sensi-tivity.Using a 4-bit DAC and the EFNS,80 km transmission was achieved in the 60-Gbit/s 64-QAM KK detection system.

optical fiber communicationsKramers-Kronig receivererror-feedback noise shapingquanti-zation noisecarrier-to-signal power ratio

Xiangyong DONG、Zhenming YU、Hongyu HUANG、Kaixuan SUN、Kun XU

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State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Beijing 100876,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaFund of State Key Laboratory of Information Photonics and Optical Communication BUPT

6182100162371056IPOC2021ZT18

2024

10.1007/s11432-023-3912-0

中国科学:信息科学(英文版)
中国科学院

中国科学:信息科学(英文版)

CSTPCDEI
影响因子：0.715
ISSN：1674-733X
年,卷(期)：2024.67(5)
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