Photonic-assisted wideband frequency downconverter with self-interference cancellation and image rejection

Weng, Beiyue; Yu, Chen; Chen, Yang

doi:10.1364/ao.58.003539

Cited by 21 publications

(5 citation statements)

References 12 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%

See 2 more Smart Citations

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%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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show abstract

“…In addition, it would be interesting that the self-interference cancellation is implemented together with frequency mixing from the practical point of view. Recently, approaches to simultaneously realize the self-interference cancellation and image-reject mixing are demonstrated based on a DP-QPSK modulator [135], or a polarization multiplexed 90°optical hybrid [136]- [137].…”

Section: Photonics-based Self-interference Cancellation Processingmentioning

confidence: 99%

Broadband Cognitive Radio Enabled by Photonics

Zhu

Pan

2020

J. Lightwave Technol.

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Cognitive radio is considered as a possible disruptive force to improve the spectral resource efficiency through sensing and interacting with the environment. Traditional electrical technologies to implement the cognitive radio face challenges in terms of bandwidth, resolution, and speed. In this paper, the concept and architecture of broadband cognitive radio systems enabled by photonics are proposed. Key microwave photonic techniques for the architecture are reviewed, including the photonics-based spectrum sensing, the photonic arbitrary waveform generation, the photonics-based self-interference cancellation processing, and the microwave photonic dechirp processing and radar imaging. A preliminary demonstration of a cognitive radar system enabled by photonics is performed. The future possible research directions on this topic are discussed.

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“…In [20]- [22], SIC is implemented using a dual-parallel Mach-Zehnder modulator (DPMZM) and a dual-parallel polarization modulator (DP-PolM), respectively. In particular, based on the work of reference [21], the research group in [23] has realized the functions of RF image suppression and the SIC. In [24], a polarization division multiplexing Mach-Zehnder modulator (PDM-MZM) with carrier suppressed single-sideband modulation is applied to achieve SIC and improve the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

RF Self-Interference Cancellation for Radio-Over-Fiber Link Based on Dual Phase Modulation in Sagnac Loop

et al. 2021

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The in-band full-duplex (IBFD) systems can send and receive data simultaneously in the same frequency band. Although the electromagnetic interference among RF channels can be released using radio over fiber (RoF) links, the receiving antenna is susceptible to the signal leakage from adjacent transmitting antennas. Due to the electronic bottlenecks, traditional RF selfinterference cancellation (SIC) systems have some problems, such as low operating frequency, narrow transmission bandwidth, and electromagnetic interference, which seriously reduces the communication performance. In this paper, a photonic RF SIC system based on dual-phase modulation in a Sagnac loop is proposed to further increase the resistance to electromagnetic interference of the IBFD systems. Based on the principle of polarization multiplexing, the damaged received signal and local interference signal are modulated on two beams of a light wave with orthogonal polarization states. The received interference signal can be canceled by polarization adjustment. In the experiment, a single-frequency interference cancelation depth of 45 dB is achieved in the proposed photonic SIC system over the operating frequency range of 5-20 GHz. Also, a demonstration of cancellation for modulated interference with a center frequency of 10 GHz and bandwidths of 20, 30, and 50 MHz is carried out.

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Photonic-assisted wideband frequency downconverter with self-interference cancellation and image rejection

Cited by 21 publications

References 12 publications

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

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

Broadband Cognitive Radio Enabled by Photonics

RF Self-Interference Cancellation for Radio-Over-Fiber Link Based on Dual Phase Modulation in Sagnac Loop

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