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

Shi, Fangjing; Fan, Yangyu; Wang, Xinyuan; Tan, Qinggui; Gao, Yongsheng

doi:10.1109/jphot.2021.3063787

Cited by 11 publications

(3 citation statements)

References 30 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also the cancellation depth is upgraded to 72.23 dB, and minimum value of SFDR is reduced respectively to −29.46 dBm and 82.51 dB [32]. With SOA [14] With HDC [20] With loop [1] With…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Non-linear photonic loop mirror based co-site interference canceller

Chandrasenan¹,

Zacharias²

2022

Laser Phys. Lett.

View full text Add to dashboard Cite

Full duplex-in band (FDIB) is a well-established solution for increasing the data rate and spreading the link range for future communication systems. FDIB systems need no additional bandwidth requirement. However, they are confronted with a major interference challenge on the same site, called co-site interference (CSI). Long-established co-site interference cancellation (CSIC) methods achieve a cancellation depth upto 35 dB, conversely it has space containments, manufacturing imperfections, induces noise penalties and limits isolation bandwidth. To overcome these problems, RF photonic CSIC methods have been developed, which have produced 30 dB wide-band interference suppression. They also increase bandwidth, have a flexible structure, minimize losses and prevent periodic power fading. But these systems have a problem of inherent DC drift, low maintenance of coherence, and low isolation at low transmission power. Thus, there is a high need for photonic CSIC designs of FDIB systems that operate over wider bandwidths and at higher transmission powers. Here, a newfangled CSIC system based on a non-linear photonic loop and frequency down-conversion is proposed. It shows excellent CSIC suppression of greater than 61 dB, for a single frequency signal of interest (SOI) with maximum RF power of 13 dBm. Without frequency down-conversion, the system maintains an average cancellation depth of 62.541 dB for single frequency SOI. After frequency down conversion, the system maintains an average cancellation depth of 61.208 dB for narrow band SOI. The system attains 18% error vector magnitude at −20 dB RF output power, which confirms the comprehensive quality of the system.

show abstract

“…Also the cancellation depth is upgraded to 72.23 dB, and minimum value of SFDR is reduced respectively to −29.46 dBm and 82.51 dB [32]. With SOA [14] With HDC [20] With loop [1] With…”

Section: Resultsmentioning

confidence: 99%

“…spectrum for 5G. Any approach that proposes a progress in the potent use of available spectrum is credited for closer inspection [1]. In wireless communication networks, usage of relay nodes is one technique of spreading the signal coverage area [2].…”

Section: Introductionmentioning

confidence: 99%

Non-linear photonic loop mirror based co-site interference canceller

Chandrasenan¹,

Zacharias²

2022

Laser Phys. Lett.

View full text Add to dashboard Cite

show abstract

“…Adjust the tap coefficient of the fiber optic network communication system, use blind equalization method for multipath suppression, and improve the output fidelity of the signal [4,11].…”

Section: Communication Channel Model and Relay Protection Signal Anal...mentioning

confidence: 99%

Linear Anti-interference Algorithm for Digital Signal Transmission in Fiber Optic Communication Networks based on Link Analysis

Wu,

Jin,

Wang

2024

SCPE

View full text Add to dashboard Cite

In order to achieve accurate transmission of protection signals in fiber optic communication networks, it is necessary to perform channel balancing configuration of fiber optic communication networks and adaptive forwarding control processing of relay protection signals, the author proposes an accurate transmission method for relay protection signals in fiber optic communication networks based on time-varying multipath fading suppression and adaptive beamforming. The system analyzes the sources of wireless long-distance pain signal interference signals, introduces anti-interference technologies such as two-dimensional joint processing (STAP), provides anti-interference algorithms and related gain analysis, and conducts signal processing gain simulation using MATLAB. Based on the analysis of comprehensive simulation results, at a given symbol length, the signal bandwidth increases, and the processing gain infinitely approaches the given theoretical limit value, rather than increasing nonlinearly. The reason is that the channel is affected by noise, and the channel estimation value and signal conjugate multiplication produce a noise quadratic term. At this point, the estimated value of the coherent region channel is reduced by the influence of noise, and the signal-to-noise ratio loss caused by the noise quadratic term is reduced, so the processing gain increases. During the process of infinite increase in signal bandwidth, the input signal-to-noise power ratio of the receiver tends to decrease towards an infinite value, limited by the size of the coherent region. The channel estimation value increases under the influence of noise, and the noise quadratic term is the main factor affecting the output noise power. When the symbol length is greater than the coherent time, the smaller the maximum Doppler frequency shift and the larger the coherent detection area, the greater the processing gain.

show abstract

Photonic self-interference cancellation for RoF-based in-band full-duplex link in wireless fronthaul access network

Ma,

Wang

2024

Optical Fiber Technology

View full text Add to dashboard Cite

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

Cited by 11 publications

References 30 publications

Non-linear photonic loop mirror based co-site interference canceller

Non-linear photonic loop mirror based co-site interference canceller

Linear Anti-interference Algorithm for Digital Signal Transmission in Fiber Optic Communication Networks based on Link Analysis

Photonic self-interference cancellation for RoF-based in-band full-duplex link in wireless fronthaul access network

Contact Info

Product

Resources

About