Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm

Jie Su; Xinying Li; Jianjun Yu

doi:doi:10.3788/COL201614.050608

Chinese Optics Letters, 2016, 14 (5): 050608, Published Online: Aug. 6, 2018

Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm Download： 836次

Jie Su ^*Xinying Li Jianjun Yu

Author Affiliations

Education Ministry Key Laboratory of Electromagnetic Wave Information Science, Information Science and Engineering School, Fudan University, Shanghai 200433, China

Figures & Tables

Fig. 1. System structure of conventional DD-OFDM (Tx, transmitter, Rx, receiver; PRBS, pseudo random bit sequence; DAC, digital-to-analogue conversion; LPF, low-pass filter; EDFA, erbium-doped fiber amplifier).

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Fig. 2. Principle of DFT-spread OFDM modulation and demodulation.

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Fig. 3. Experimental setup for a 32 Gbaud OFDM-QPSK signal with 7 km SMF-28 transmission utilizing single-arm MZM in DD system (EA, electrical amplifier; OSC, oscilloscope).

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Fig. 4. Constellation comparison of a 32 Gbaud QPSK after 7 km SMF-28 transmission when the input power into the PD is −6.5 dBm.

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Fig. 5. Constellation comparison of a 32 Gbaud QPSK after 7 km SMF-28 transmission when the input power into the PD is −8.7 dBm utilizing different technologies.

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Fig. 6. Curves of BER versus input power into a PD utilizing different techniques.

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Jie Su, Xinying Li, Jianjun Yu. Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm[J]. Chinese Optics Letters, 2016, 14(5): 050608.

Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm Download： 836次

Fig. 1. System structure of conventional DD-OFDM (Tx, transmitter, Rx, receiver; PRBS, pseudo random bit sequence; DAC, digital-to-analogue conversion; LPF, low-pass filter; EDFA, erbium-doped fiber amplifier).

Fig. 2. Principle of DFT-spread OFDM modulation and demodulation.

Fig. 3. Experimental setup for a 32 Gbaud OFDM-QPSK signal with 7 km SMF-28 transmission utilizing single-arm MZM in DD system (EA, electrical amplifier; OSC, oscilloscope).

Fig. 4. Constellation comparison of a 32 Gbaud QPSK after 7 km SMF-28 transmission when the input power into the PD is −6.5 dBm.

Fig. 5. Constellation comparison of a 32 Gbaud QPSK after 7 km SMF-28 transmission when the input power into the PD is −8.7 dBm utilizing different technologies.

Fig. 6. Curves of BER versus input power into a PD utilizing different techniques.

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Direct-detection OFDM-QPSK system performance improvement enabled by DFT spread and receiver-based ISFA algorithm Download： 836次

Fig. 1. System structure of conventional DD-OFDM (Tx, transmitter, Rx, receiver; PRBS, pseudo random bit sequence; DAC, digital-to-analogue conversion; LPF, low-pass filter; EDFA, erbium-doped fiber amplifier).

Fig. 2. Principle of DFT-spread OFDM modulation and demodulation.

Fig. 3. Experimental setup for a 32 Gbaud OFDM-QPSK signal with 7 km SMF-28 transmission utilizing single-arm MZM in DD system (EA, electrical amplifier; OSC, oscilloscope).

Fig. 4. Constellation comparison of a 32 Gbaud QPSK after 7 km SMF-28 transmission when the input power into the PD is −6.5 dBm.

Fig. 5. Constellation comparison of a 32 Gbaud QPSK after 7 km SMF-28 transmission when the input power into the PD is −8.7 dBm utilizing different technologies.

Fig. 6. Curves of BER versus input power into a PD utilizing different techniques.

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