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Publications
Publications (32)
The integration of photonic terahertz (THz) wireless and optical fiber links combines the advantages of ultra-long distance, low-loss, and high-capacity transmission of fiber link with the advantages of flexible, seamless transmission of THz wireless link. Compared with single-carrier (SC) modulation, orthogonal frequency division multiplexing (OFD...
We experimentally demonstrate 56-GBaud PS-64QAM signal fiber-THz-fiber seamless communication by employing photonic up-/down-conversion technique and cascaded MIMO equalization algorithms, achieving a record-breaking single-carrier line rate of 616 Gbit/s.
We experimentally demonstrate the robustness of autoencoder-based constellation shaping against semiconductor laser noise and nonlinearity. Up to 46% lower BER and 1.5 dB gain are achieved in the fiber-THz system at 320 GHz.
In this Letter, we propose a novel, to the best of our knowledge, adaptive feedback-driven probabilistic constellation-shaping (FBD-PCS) method based on the robustness evaluation criteria and employ variational autoencoder (VAE)-based equalizers to implement polarization demultiplexing and nonlinear equalization for the recovery of high-order PCS-Q...
The coexistence needs of sensing and communication in millimeter-wave (mmW) bands have urgently driven the seamless integration of sensing and communication in the upcoming mmW era. However, the time-frequency competition between the two functions makes it difficult to accommodate both high sensing resolution and large communication capacity. In th...
The optical transport network (OTN) encryption technology is attractive to solve the physical-layer security in services for the light-path provision process. This paper mainly explores the security-aware 5G radio access network (RAN) slice mapping problem with the tiered isolation (TI) policy, which decides the solution for aggregating service int...
Air interface user rate (AIUR) of 1-Tbps is one of the most important key performance indicators (KPIs) for the future 6G extreme connectivity. In this study, we have proposed an efficient vector-quantized variational autoencoder (VQ-VAE) framework with a classical complex-valued 2×2 MIMO equalizer, which can implement the polarization demultiplexi...
In fiber-wireless integration systems, it is valuable to investigate whether digital subcarrier multiplexing (SCM) signal is effective in improving nonlinear tolerance against photodiode (PD) saturation compared to single-carrier (SC) signal. For a fair comparison, the mitigation of linear impairments especially for IQ mixing effects become signifi...
We propose and experimentally demonstrate an intelligent nonlinear compensation method using a stacked autoencoder (SAE) model in conjunction with principal component analysis (PCA) technology and a bidirectional long-short-term memory coupled with ANN (BiLSTM-ANN) nonlinear equalizer for an end-to-end (E2E) fiber-wireless integrated system. The SA...
The high spectrum efficiency of massive multiple input multiple output (mMIMO)-enabled beamforming is attractive for solving the massive number of connections in next-generation radio access networks (NG-RANs). However, the beamforming based on multiple antenna sub-arrays to support multi-connections would introduce extra 2D antenna sub-array selec...
With the rapid development of new services such as 5G mobile Internet and Internet of Things, the transmission capacity, transmission speed and bit error rate of future communication system are required to be higher. Terahertz(THz) band, which is between millimeter wave and far-infrared light, has the advantages of both microwave and light wave lik...
We proposed and experimentally demonstrate the first real-time transparent point-to- multipoint photonics-assisted MMW-over-fiber passive optical network transmission scheme with a record line rate of 4×125.516 Gbit/s at W-band based on optical wavelength routing scheme.
We experimentally demonstrate a rate-flexible point-to-multipoint 100G coherent PON with downlink and uplink using digital subcarrier multiplexing to simultaneously support up to 64 nodes for fixed broadband and W-band mmWave wireless access.
We propose and experimentally demonstrate a novel nonlinear constellation shape auto optimization method with a complex-valued 2D-ANN equalizer. Up to 70% lower BER compared with the conventional format is achieved at 50 Gbps in fiber-MMW system.
To relieve network resource pressure and avoid network congestion, the adoption of a sliding scheduling traffic model is crucial to achieve flexible radio access network (RAN) function deployment and provide customized services. In this paper, we investigate the problem of dynamic RAN slicing mapping under the sliding scheduled traffic model in met...
The evolution of mobile communications towards millimeter-wave (mmW) bands provides a strong opportunity for the seamless integration of radar and wireless communications. We present a photonics-aided mmW integrated sensing and communications (ISAC) system constructed by photonic up-conversion using a coherent optical frequency comb, which facilita...
The THz wireless transmission system based on photonics has been a promising candidate for further 6G communication, which can provide hundreds of Gbps or even Tbps data capacity. In this paper, 144-Gbps dual polarization quadrature-phase-shift-keying (DP-QPSK) signal generation and transmission over a 20-km SSMF and 3-m wireless 2 × 2 multiple-inp...
We propose and experimentally demonstrate a real-time fiber-THz-fiber 2 × 2 multiple-input multiple-output (MIMO) seamless integration system at 340-510 GHz using commercial digital coherent optics (DCO) modules for baseband signals processing, which realizes a record net rate of 103.125 Gb/s dual polarization quadrature-phase-shift-keying (DP-QPSK...
We proposed a novel equalizer structure to compensate transmitter IQ imbalance for single-lane 800G coherent optical transmission system. The performances of equalizer are extensively validated using M-QAM modulation with single-wavelength 800Gbit/s net rate.
We have intensively simulated PAM-4 signal transmission at 100 GHz using intensity modulation and phase-insensitive heterodyne coherent detection. This comprehensive simulation can provide significant guidance for photonics-aided THz-wave electro-optical components design.
We experimentally demonstrated the first cost-efficient flexible-rate THz wireless transmission system at 101 GHz based on multi-band CAP-PAM modulation and envelope detection. The aggregate data rate of 8.49 Gb/s can be obtained with 4-sub-bands CAP-PAM modulation.
Artificial Neural networks-based geometric shaping is proposed that includes Gray-like mappings. Over 0.2dB gain in GMI and BER improvement is achieved over a wide range of SNRs without requiring any presumed model for the channel.
