Gang Chen, Ming Chen, Wen Chen, Lede Yin, Aitao Deng, Yuxin Cai, Dengqiao Wang. Real-time reception of NHS-OFDM signal with SPA-enhanced channel estimation for intensity-modulated direct-detection systems[J]. Chinese Optics Letters, 2022, 20(5): 050601
- Chinese Optics Letters
- Vol. 20, Issue 5, 050601 (2022)
Fig. 1. Block diagram of (a) C2R operation and (b) NHS-OFDM time-domain frame structure.
Fig. 2. Experimental setup of the real-time NHS-OFDM transmission system with IMDD. Inset (a) is OFDM frame structure, (b), (c) are the baseband transceivers hardware platforms, and (d), (e) are the RTL schematics of the real-time NHS-OFDM transceiver.
Fig. 3. (a)–(c) Normalized AR and (d)–(f) the EVM performance for 64/128/256-point FFTs.
Fig. 4. Recovered constellation diagrams: (a)–(c) LS, (d)–(f) ISFA, and (g)–(i) SPA for different FFT sizes.
Fig. 5. Real-time and offline measured BER performance versus ROP: (a) 64-point and (b) 128-point FFTs.
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Table 1. Some Key Parameters Used in the Experiment
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Table 2. The Device Utilization of the SPA/ISFA Sub-Module in NHS-OFDM with 64/128/256-Point FFT Functionsa
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