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Conference Paper
A Simplified DSP Algorithm in Modified Alamouti-Coded Coherent Signals for High-Speed Optical Access Networks
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- Authors
- Jung-Yeol Oh, Sang-Rok Moon, Jong-Wan Kim, Hun-Sik Kang
- Issue Date
- 2024-07
- Citation
- Opto-Electronics and Communications Conference (OECC) 2024, pp.1-3
- Language
- English
- Type
- Conference Paper
- Abstract
- Alamouti-coded polarization-time block code (APTBC) enables phase-diverse coherent detection without optical polarization tracking when combined with a simple single-polarization coherent receiver. However, this technology requires special digital signal processing (DSP) algorithms for data recovery. In this paper, we propose a Modified Alamouti (MA) coded coherent algorithm that significantly reduces the complexity of the receiver DSP for data recovery. The MA-coded algorithm halves the number of required equalizers compared to conventional methods. We validate its performance through simulations and experimental demonstration of a 100 Gbps 16 QAM single-carrier MA-coded coherent system over 20 km of standard single-mode fiber (SMF). Performance verification shows that the MA-coded system achieves comparable results to conventional methods, achieving a power budget of 34 dB for 0-20 km fiber transmission.
- KSP Keywords
- 100 Gbps, 16-ary quadrature amplitude modulation(16QAM), Block codes, Coherent Detection, Coherent receiver, Coherent signals, Coherent system, Conventional methods, DSP algorithm, Data recovery, Digital Signal Processing