A Digital-Domain Controlled Nonlinear RF Interference Cancellation Scheme for Co-Site Wideband Radios

Ge, Songhu; Meng, Jin; Xing, Jinling; Liu, Yongcai; Gou, Chuanjie

doi:10.1109/temc.2018.2871129

Cited by 18 publications

(9 citation statements)

References 23 publications

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“…The analog-digital hybrid SIC is thus proposed. This approach is performed by building a digital copy of the self-interference signal from the baseband-transmitted signal and then transmitting the digital copy through an auxiliary analog transmit chain to reconstruct the RF self-interference signal [48][49][50][51][52]. In this approach, a finite impulse response filter is implemented in the digital domain to characterize the self-interference propagation channel to generate a reconstructed self-interference signal of multipath components.…”

Section: Analog-digital Hybrid Sicmentioning

confidence: 99%

“…A typical analog-digital hybrid configuration is shown in Figure 8 [51]. The high speed ADCs are utilized to directly sample the self-interference signal and the error feedback signal.…”

Section: Analog-digital Hybrid Sicmentioning

confidence: 99%

“…From the circuit perspective, the passive SIC is based on the use of passive circuits or components, e.g., resistor, capacitor, inductor, circulator etc. [54][55][56], and active passive SIC always contains active components [29,30,51]. Similar to the adaptive SIC, passive SIC techniques extract the reference signal from the transmitter, and cancel the interference signal at the receiver.…”

Section: Passive Sicmentioning

confidence: 99%

“…The coupling is suppressed, while the radiation patterns are slightly affected when the SIC isolator is introduced. The ICR of [58] is limited compared with many CDSIC [29,30,51], since it is a great challenge to rebuild a perfect copy of the self-interference signals via the simple scatterer.…”

Section: Features Of the Fdsicmentioning

confidence: 99%

See 3 more Smart Citations

Self-Interference Cancellation: A Comprehensive Review from Circuits and Fields Perspectives

Zhang¹,

He²,

Li³

et al. 2022

Electronics

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Increased demand for higher spectrum efficiency, especially in the space-limited chip, base station, and vehicle environments, has spawned the development of full-duplex communications, which enable the transmitting and receiving to occur simultaneously at the same frequency. The key challenge in this full-duplex communication paradigm is to reduce the self-interference as much as possible, ideally, down to the noise floor. This paper provides a comprehensive review of the self-interference cancellation (SIC) techniques for co-located communication systems from a circuits and fields perspective. The self-interference occurs when the transmitting antenna and the receiving antenna are co-located, which significantly degrade the system performance of the receiver, in terms of the receiver desensitization, signal masking, or even damage of hardwares. By introducing the SIC techniques, the self-interference can be suppressed and the weak desired signal from the remote transmitter can be recovered. This, therefore, enables the full-duplex communications to come into the picture. The SIC techniques are classified into two main categories: the traditional circuit-domain SICs and the novel field-domain SICs, according to the method of how to rebuild and subtract the self-interference signal. In this review paper, the field-domain SIC method is systematically summarized for the first time, including the theoretical analysis and the application remarks. Some typical SIC approaches are presented and the future works are outlooked.

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Section: Analog-digital Hybrid Sicmentioning

confidence: 99%

“…A typical analog-digital hybrid configuration is shown in Figure 8 [51]. The high speed ADCs are utilized to directly sample the self-interference signal and the error feedback signal.…”

Section: Analog-digital Hybrid Sicmentioning

confidence: 99%

Section: Passive Sicmentioning

confidence: 99%

Section: Features Of the Fdsicmentioning

confidence: 99%

See 2 more Smart Citations

Self-Interference Cancellation: A Comprehensive Review from Circuits and Fields Perspectives

Zhang¹,

He²,

Li³

et al. 2022

Electronics

Self Cite

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show abstract

“…Adaptive filters are adopted for interference cancellation [ 1 ]. For wideband interference, scholars have adopted multi-tap structures to suppress it, such as digital multi-tap [ 2 , 3 , 4 , 5 ], analog multi-tap [ 6 , 7 , 8 ], and digital–analog hybrid multi-tap [ 9 , 10 , 11 , 12 , 13 ]. However, the taps are coupled with each other, and the matrix dimension is high, so the convergence speed of the multi-tap structure is slow.…”

Section: Introductionmentioning

confidence: 99%

Wideband Interference Cancellation System Based on a Fast and Robust LMS Algorithm

Lu,

Qin,

et al. 2023

Sensors

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The interference cancellation ratio (ICR) is a key performance indicator of digital-to-analog hybrid radio frequency (RF) interference cancellation systems. Aiming at the low convergence speed of a digital-to-analog hybrid RF interference cancellation system based on a multi-tap structure (MDARFICS), a novel, fast, and robust variable-step-size least-mean-square (LMS) algorithm based on an improved hyperbolic tangent function (IHVSS-LMS) is proposed. The IHVSS-LMS algorithm adopts an improved hyperbolic tangent function and uses adjustable parameters and the iteration number to jointly adjust the step size, which improves the convergence speed and reduces the computational complexity. Moreover, by using the prior information of the input signal, the non-linear relationship between the step size and the input signal power is established, which enhances the robustness and the ability to suppress interference with mutable power. The IHVSS-LMS algorithm is applied to the MDARFICS. Through theoretical derivation, the convergence speed and the steady-state expressions of the interference cancellation ratio of the MDARFICS are obtained. The simulation results show that under the conditions of high and low signal-to-noise ratio (SNR), the robustness, convergence speed, and steady-state error performance of the IHVSS-LMS algorithm are better than the existing variable-step-size algorithm. The experimental results show that using the IHVSS-LMS algorithm, the MDARFICS can not only effectively accelerate the convergence speed by at least three times but can also improve the ICR by more than 3 dB.

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Nonlinear Interference Cancellation Technique for Cellular Network with Time Slot Overlap

Tang

Xia

Zhang

et al. 2021

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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A Digital-Domain Controlled Nonlinear RF Interference Cancellation Scheme for Co-Site Wideband Radios

Cited by 18 publications

References 23 publications

Self-Interference Cancellation: A Comprehensive Review from Circuits and Fields Perspectives

Self-Interference Cancellation: A Comprehensive Review from Circuits and Fields Perspectives

Wideband Interference Cancellation System Based on a Fast and Robust LMS Algorithm

Nonlinear Interference Cancellation Technique for Cellular Network with Time Slot Overlap

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