Photonics-Assisted Ultrawideband RF Self-Interference Cancellation With Signal of Interest Recovery and Fiber Transmission

Zhu, Zihang; Gao, Congrui; Zhao, Shanghong; Zhou, Tao; Wang, Guodong; Li, He; Tan, Qinggui

doi:10.1109/jlt.2021.3124084

Cited by 16 publications

(2 citation statements)

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“…Table 1 provides a performance comparison between this work and other reported methods in terms of functions, main components, cancellation bandwidth, cancellation depth, and fiber transmission capability. To date, photonic-assisted RF SIC schemes have shown wide bandwidth with a large cancellation depth [ 12 , 13 , 14 , 16 ], a combination of frequency conversion functions [ 15 , 17 , 18 , 19 , 20 ], or long-distance fiber transmission [ 13 , 14 , 15 , 16 , 17 , 18 , 20 ]. Nevertheless, compared with the proposed scheme, the scheme in Refs.…”

Section: Simulation and Discussionmentioning

confidence: 99%

“…Previously, considerable efforts have been devoted to solving the above three problems. To date, the reported works based on microwave photonic technology have shown the potential for deep self-interference cancellation (SIC) over a wide frequency band [ 12 , 13 , 14 ], good compatibility with fiber transmission [ 15 , 16 , 17 ], and high-performance frequency conversion [ 18 , 19 , 20 ]. All three kinds of schemes feature broad instantaneous bandwidth, high operation frequency, electromagnetic interference immunes, and compact configuration compared with their electrical counterparts [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Photonic-Assisted Scheme for Simultaneous Self-Interference Cancellation, Fiber Dispersion Immunity, and High-Efficiency Harmonic Down-Conversion

Zhu

Gao

et al. 2023

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A photonic approach to the cancellation of self-interference in the optical domain with fiber dispersion immunity and harmonic frequency down-conversion function is proposed based on an integrated, dual-parallel, dual-drive Mach–Zehnder modulator (DP-DMZM). A dual-drive Mach–Zehnder modulator (DMZM) is used as an optical interference canceller, which cancels the self-interference from the impaired signal before fiber transmission to avoid the effect of fiber transmission on the cancellation performance. Another DMZM is used to provide carrier-suppressed, local-oscillation (LO)-modulated, high-order double optical sidebands for harmonic frequency down-conversion to release the strict demand for high-frequency LO sources. By regulating the DC bias of the main modulator, the signal of interest (SOI) can be down-converted to the intermediated frequency (IF) band after photoelectric conversion with improved frequency-conversion efficiency, immunity to the fiber-dispersion-induced power-fading (DIPF) effect, and effective signal recovery. Theoretical analyses and simulation results show that the desired SOI in the X and K bands with a bandwidth of 500 MHz and different modulation formats can be down-converted to the IF frequency. The self-interference noise with the 2 GHz bandwidth is canceled, and successful signal recovery is achieved after a 10 km fiber transmission. The recovery performance of down-converted signals and the self-interference cancellation depth under different interference-to-signal ratios (ISRs) is also investigated. In addition, the compensation performance of DIPF is verified, and a 6 dB improvement in frequency conversion gain is obtained compared with previous work. The proposed scheme is compact, cost-effective, and thus superior in wideband self-interference cancellation, long-range signal transmission, and effective recovery of weak desired signals.

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