Photonic-Assisted Reconfigurable LO Harmonic Downconverter With RF Self-Interference Cancellation and Image-Rejection

Yang, Der‐Ching; Wu, Fuzheng; Yang, Feng; Yin, Jing; Wang, Dayong; Wang, Yunxin; Li, Tao; Zhou, Tao

doi:10.1109/jlt.2022.3215176

Cited by 8 publications

(3 citation statements)

References 36 publications

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“…In order to compare with the schemes cited in this manuscript (Refs. [12,13]) using an electric attenuator to achieve amplitude matching, the influence of the electric attenuator tuning accuracy on the performance of SIC performance was also carried out through simulation. Currently, for commonly used commercially available wideband electrical attenuators (DC-18 GHz), the tuning step of the electrical attenuators is 1 dB, and continuous tuning is usually possible [28].…”

Section: The Effect Of Pol Tuning Accuracymentioning

confidence: 99%

“…Previously, several photonics-based schemes to eliminate these two kinds of in-band interference have been demonstrated [12][13][14][15], which are very instructive. However, the SIC function in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…However, the SIC function in Refs. [12,13] was realized by virtue of electrical components to achieve time delay and amplitude matching between SI and reference signals. Since the cancellation depth is greatly affected by the time delay and amplitude matching, the SIC performance based on electrical components lags behind schemes applying optical devices with high tuning precision due to its limited tuning accuracy [16].…”

Section: Introductionmentioning

confidence: 99%

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Photonic-Enabled Image Rejection Mixer with Simultaneous Wideband Self-Interference Cancellation for In-Band Full-Duplex System

Zhu

Gao

et al. 2023

Photonics

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In this paper, a photonic-enabled image rejection mixer (IRM) that features an ultrawideband self-interference cancellation (SIC) function and a compact configuration is proposed. The parameter tuning of SIC is realized in an optical domain, which avoids the use of electrically tuned devices with limited bandwidth and precision, so that high-precision parameter matching can be realized in the optical domain to realize deep and ultrawideband SIC. The key point of image rejection (IR) is to construct a pair of orthogonal local oscillation (LO) signals through DC-bias-induced phase shift. This not only avoids a high-frequency electrical 90-degree hybrid coupler (HC) applied in the traditional Hartley structure, but also compensates the phase deviation in the electrical intermediate frequency (IF) 90-degree HC flexibly, ensuring wideband and deep IR operation. The simulation results show that the proposed IRM can achieve ultrawideband SIC and IR with the simultaneous high-efficiency recovery of useful signals. They also verify that the scheme has good resistance to strong interference, and can cope with the phase imbalance of the IF 90-degree electrical HC, ensuring the good performance of the system, which has a wide application prospect in various in-band full-duplex (IBFD) systems.

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Section: The Effect Of Pol Tuning Accuracymentioning

confidence: 99%