Seamlessly merging radar ranging/imaging, wireless communications, and spectrum sensing, for 6G empowered by microwave photonics

no code implementations • 8 Apr 2024 • Taixia Shi, Yang Chen, Jianping Yao

Integration of radar, wireless communications, and spectrum sensing is being investigated for 6G with an increased spectral efficiency.

Channelized analog microwave short-time Fourier transform in the optical domain with improved measurement performance

no code implementations • 25 May 2023 • Xiaowei Li, Taixia Shi, Dong Ma, Yang Chen

For the first time, channelization measurement technology is introduced in the STFT system based on frequency sweeping and FTTM, greatly reducing the frequency-sweep range of the required frequency-sweep signal to the analysis bandwidth divided by the number of channels.

Photonics-assisted analog wideband self-interference cancellation for in-band full-duplex MIMO systems with adaptive digital amplitude and delay pre-matching

no code implementations • 3 Aug 2022 • Taixia Shi, Yang Chen

A photonics-assisted analog wideband RF self-interference (SI) cancellation and frequency downconversion approach for in-band full-duplex (IBFD) multiple-input multiple-output (MIMO) systems with adaptive digital amplitude and delay pre-matching is proposed based on a dual-parallel Mach-Zehnder modulator (DP-MZM).

Photonics-based de-chirping and leakage cancellation for frequency-modulated continuous-wave radar system

no code implementations • 12 Nov 2021 • Taixia Shi, Dingding Liang, Moxuan Han, Yang Chen

The leakage cancellation scheme is used in a radar system.

Digital-assisted photonic analog wideband multipath self-interference cancellation

no code implementations • 12 Nov 2021 • Moxuan Han, Taixia Shi, Yang Chen

The proposed method can solve the performance limitation in the previously reported SIC methods of constructing the multipath SI signal using a single reference caused by the limited dynamic range of the digital-to-analog converter when the direct-path SI signal is much stronger than the sub-weak reflection-path SI signals.

Photonics-assisted wideband RF self-interference cancellation with digital domain amplitude and delay pre-matching

no code implementations • 7 Sep 2021 • Taixia Shi, Moxuan Han, Yang Chen

One dual-drive Mach-Zehnder modulator is used to implement the analog self-interference cancellation by pre-adjusting the delay and amplitude of the reference signal applied to the dual-drive Mach-Zehnder modulator in the digital domain.

Photonic-enabled radio-frequency self-interference cancellation incorporated in an in-band full-duplex radio-over-fiber system

no code implementations • 1 Sep 2021 • Taixia Shi, Yu Chen, Yang Chen

A photonic approach for radio-frequency (RF) self-interference cancellation (SIC) incorporated in an in-band full-duplex radio-over-fiber system is proposed.

Multiple radio frequency measurement with an improved frequency resolution based on stimulated Brillouin scattering with a reduced gain bandwidth

no code implementations • 23 Apr 2021 • Taixia Shi, Yang Chen

The unknown RF signal is also SSB modulated on a carrier that has been modulated by a sweep signal, thus the unknown RF signal is converted to a sweep optical signal along with the sweep optical carrier.