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We propose and experimentally demonstrate a novel architecture to generate W-band QPSK vector-signal based on photonic-heterodyne-beating, phase-precoding and OCS. For our knowledge, this is the first time to generate W-band vector-signal based on OCS technology.
We experimentally demonstrate a single-carrier 400G solution based on 51.25-GBaud PDM-32QAM signal at 6.15-b/s/Hz SE over 1200-km transmission distance. Training assisted pre-compensations and both transmitter and receiver based look-up table are employed to mitigate channel bandwidth constraint and component nonlinearity impairment.
We experimentally compare OFDM and Single-carrier modulation in a large-capacity optical-wireless signal delivery system at W-band. We conclude that OFDM is more suitable in a scenario of relatively short wireless distance and limited receiver bandwidth.
For the first time, bandwidth-efficient iOÖ+G/λ IMDD optical links based on Nyquist 256QAM is proposed and demonstrated. With innovative fast-converging blind equalization and nonlinearity compensation algorithms, 160-Gbps gross line rate over 2-km SMF is achieved.
We demonstrated 4-channel high level QAM-DMT transmission over 20-km SMF-28 with real-time reception. 58.72-Gb/s 256QAM-DMT and 56.4-Gb/s 128QAM-DMT signal transmission within 25-GHz grid is achieved with the BER under 2.4×10−2 and real-time reception.
We demonstrated four-channel WDM 256.51Gb/s 16QAM-DMT short-reach optical-amplifier-free inter-connection with real-time reception. We achieved highest capacity DMT signal transmission over 2.4-km SMF with the BER under SD-FEC limitation of 2.4×1 0−2.
Signal-carrier PM-256QAM generation at record-breaking line rate of 256 Gb/s and its point-to-point transmission over 20-km SMF are experimentally demonstrated, which is enabled by using a fast-converging polarization-tracking equalizer with coordinated CMA and DD-LMS algorithm.
We review bandwidth constraining and digital signal processing techniques for achieving high spectral efficiency optical fiber transmissions. We discuss advantages and disadvantages of three different combinations of adaptive equalization and sequence detection schemes, and show experimental demonstrations.
We review recent single-carrier 400G schemes based on high baud rate signals with different spectrum efficiency (SE) based on QPSK and 16QAM. The long-haul performances under different transmission conditions and modulation formats are studied. The digital signal processing for 400G signal recovery is also discussed.
This paper presents an X-band chirp radar receiver with bandwidth reduction for range detection. The proposed receiver is composed primarily of a RF front end with reconfigurable bandwidth, a receiver baseband and an ADC. The receiver uses dual down-conversion architecture to convert the X-band chirp signal to the baseband signal, which is further mixed with a replica of the transmitted chirp through...
A novel DSP scheme for spectrum shaped polarization-multiplexed quadrature duobinary signal based on multi-modulus blind equalizations is proposed and demonstrated with simulation and experimental results on 25GHz Nyquist-WDM channels with 112Gb/s PM-QPSK and SE >4bit/s/Hz.
We propose and experimentally investigate digital nonlinear compensation and inter-channel cross talk suppression for 4×160.8Gb/s DWDM PDM-QPSK transmission with simplified heterodyne coherent detection. The BER has been improved from 5.7×10-3 to 3.5×10-4 after 1300km SMF-28.
This paper presents an on-chip jitter measurement technique based on the Vernier ring time-do-digital converter (VRTDC). Vernier delay line is an attractive structure for the implementation of high performance TDC due to its sub-gate-delay resolution and cancellation of the first order process, voltage and temperature (PVT) variations. In order to improve the detectable range, area cost and power...
In this paper, we will report our latest experimental results. These includes 20 times 112-Gb/s PDM-RZ-QPSK transmission over 1540-km of standard single mode fiber (SSMF), a record capacity of 17 Tb/s within the C-band optical bandwidth (4.025 THz) over 660 km of ultra-low-loss fiber using 161 times 114-Gbps PDM-RZ-8PSK formats, and hybrid 10 times 112 Gb/s PDM-RZ-QPSK and 10 times 44 Gb/s PDM-NRZ-QPSK...
A broadband access system with a record bandwidth of 16 Gbit/s radio OFDM signals transmission over 50 m GIPOF at 1310 nm has been designed and experimentally demonstrated for the first time.
Employing PolMux-RZ-8PSK modulation and coherent detection, we demonstrate 25 GHz-spaced, 161times114 Gb/s DWDM transmission through eight spans of ultra-low-loss fiber (average span length/loss of 82.75 km/14.6 dB) with a record capacity of 17 Tb/s (spectral efficiency 4.2 b/s/Hz) within the C-band EDFA bandwidth (4.025 THz).
We demonstrated an optical-wireless testbed delivering wired and wireless services simultaneously in an integrated ROF and WDM-PON access network. It was successfully transmitted 270Mbit/s uncompressed SDTV and 2.5Gbit/s data over 25km fiber and 10.2m wireless link.
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