64APSK constellation scheme for short-reach DMT with ISDD enabled SFO compensation

Liu, Yi; He, Jing; Chen, Ming; Xiao, Yaoqiang; Cheng, Yun

doi:10.1016/j.optcom.2020.125689

Cited by 4 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CP/CS is added to eliminate ISI. Besides, one training sequence is inserted in front of each precoded DMT frame to facilitate timing synchronization and zero-forcing channel equalization [24] . Finally, the DMT signal is digitally clipped to combat the DAC-induced quantization noise [25] and reduce the PAPR At the receiver, after 1.9 m free-space transmission, the optical precoded DMT signals are detected by a photodiode (PD) and captured by a digital storage oscilloscope (DSO, Lecroy Wavemaster 820-Zi-A).…”

Section: Fdspmentioning

confidence: 99%

OCT-based partial data-carrying subcarriers precoding and ISFA-enabled DMT-VLC system

et al. 2023

View full text Add to dashboard Cite

To overcome the unbalanced signal-to-noise ratio (SNR) among data-carrying subcarriers (SCs) induced by the imperfect frequency response of optoelectronic devices and various interferences, a channel-independent partial data-carrying SCs precoding (PDSP) method based on orthogonal circular matrix transform (OCT) is proposed and experimentally investigated in an intra-symbol frequency average (ISFA)-enabled discrete multi-tone (DMT) visible light communication (VLC) system. After transmission over 1.9 m free space, at the optimal bias current of 100 mA, the experimental results show that the bit error ratio (BER) performance can be improved by up to an order of magnitude with conventional full data-carrying SCs precoding (FDSP) and PDSP scheme, compared to that without a precoding scheme. Moreover, the BER performance can further be enhanced when the ISFA algorithm with optimal taps is employed. Compared with the FDSP scheme, the proposed PDSP scheme owns a similar BER performance and a significant reduction in required multiplication and addition operations, and it may be a good option to efficiently combat the unbalanced impairments of DMT-VLC transmission systems.

show abstract

Section: Fdspmentioning

confidence: 99%

OCT-based partial data-carrying subcarriers precoding and ISFA-enabled DMT-VLC system

et al. 2023

View full text Add to dashboard Cite

show abstract

“…After the HS operation, the cyclic prefix (CP) with a length of eight points is added for each 256-point inverse fast Fourier transform (IFFT) output to resist ISI. Additionally, one training symbol (TS) is inserted in the front of each PS-DMT frame to realize both timing synchronization and channel estimation [22]. Finally, the precoded PS-DMT signal is digitally clipped to combat the digital-to-analog converter (DAC)-induced quantization noise [23] and reduce PAPR.…”

Section: Setupmentioning

confidence: 99%

Probabilistically-Shaped DMT for IM-DD Systems with Low-Complexity Fast WHT-Based PDSP

et al. 2022

Self Cite

View full text Add to dashboard Cite

Transmission capacity and receiver sensitivity of an intensity-modulation direct detection (IM-DD) optical discrete multi-tone (DMT) system can be improved by using the probabilistically shaping (PS) technique. However, different probabilistic distributions will be required owing to the unbalanced signal-to-noise ratio (SNR) among data-carrying subcarriers (SCs) induced by the imperfect frequency response of optical/electrical devices, which can increase the implementation complexity of the PS-DMT transceiver. In this work, different signal pre-processing schemes including pre-equalization, Walsh–Hadamard transform (WHT)-based full data-carrying SCs precoding (FDSP) and fast WHT-based partial data-carrying SCs precoding (PDSP) are investigated for SNR equalization in a short-reach PS-DMT transmission system. After transmission over 50 km single-mode fiber, the experimental results indicated that three pre-processed signals have almost the same generalized mutual information (GMI) performance and receiver sensitivity improvements. The proposed fast WHT-based PDSP scheme may be a good option for the implementation of the PS-DMT transmission systems with a large SC SNR fluctuation regarding computational complexity.

show abstract

Circular Constellation Method for OFDM-VLC System with ISDD Enabled SFO

Long

2023

Lecture Notes in Electrical Engineering

View full text Add to dashboard Cite

64APSK constellation scheme for short-reach DMT with ISDD enabled SFO compensation

Cited by 4 publications

References 13 publications

OCT-based partial data-carrying subcarriers precoding and ISFA-enabled DMT-VLC system

OCT-based partial data-carrying subcarriers precoding and ISFA-enabled DMT-VLC system

Probabilistically-Shaped DMT for IM-DD Systems with Low-Complexity Fast WHT-Based PDSP

Circular Constellation Method for OFDM-VLC System with ISDD Enabled SFO

Contact Info

Product

Resources

About