Real time adaptive RF and digital self-interference cancellation for full-duplex transceivers

Tapio, Visa; Juntti, Markku; Pärssinen, Aarno; Rikkinen, Kari

doi:10.1109/acssc.2016.7869640

Cited by 9 publications

(10 citation statements)

References 14 publications

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“…The DSIC performance of this scheme is optimal among LS estimation-based DSIC schemes, at the expense of high computational complexity resulting from the use of a pseudo inverse of the training matrix. In [12], an iterative DSIC scheme based on the least-mean-square (LMS) algorithm has been proposed, in which the DSIC performance converges to that proposed in [11], despite its lower computational complexity. In addition, another DSIC scheme has been proposed in [13], which is based on the minimum-meansquare-error estimation of the SI channel to improve DSIC performance at the cost of exploiting the statistical information of the SI channel.…”

Section: Novel Digital Cancelation Methods Inmentioning

confidence: 99%

Novel Digital Cancelation Method in Presence of Harmonic Self-Interference

Gwak

Lee

et al. 2017

ETRI Journal

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In‐band full‐duplex (IFD) communication has recently attracted a great deal of interest because it potentially provides a two‐fold spectral efficiency increase over half‐duplex communications. In this paper, we propose a novel digital self‐interference cancelation (DSIC) algorithm for an IFD communication system in which two nodes exchange orthogonal frequency‐division multiplexing (OFDM) symbols. The proposed DSIC algorithm is based on the least‐squares estimation of a self‐interference (SI) channel with block processing of multiple OFDM symbols, in order to eliminate the fundamental and harmonic components of SI induced through the practical radio frequency devices of an IFD transceiver. In addition, the proposed DSIC algorithm adopts discrete Fourier transform processing of the estimated SI channel to further enhance its cancelation performance. We provide a minimum number of training symbols to estimate the SI channel effectively. The evaluation results show that our proposed DSIC algorithm outperforms a conventional algorithm.

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Section: Novel Digital Cancelation Methods Inmentioning

confidence: 99%

Novel Digital Cancelation Method in Presence of Harmonic Self-Interference

Gwak

Lee

et al. 2017

ETRI Journal

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“…Antenna design is based on the characteristic modes theory [12], [13]. The same antenna model was used also in [14], [15]. The RF canceller is is shown in Fig.…”

Section: Transceiver and Self-interference Cancellationmentioning

confidence: 99%

“…is a threshold power for preventing ADC overload. It was shown in [14] that using a variable step size in the SD algorithm can improve the convergence rate. In this case, the step is chosen based on the AGC value using Algorithm 2.…”

Section: Transceiver and Self-interference Cancellationmentioning

confidence: 99%

“…The maximum values of the integral (INL) and differential (DNL) non-linearity to least significant bit of the AD converters are 5.0 and 0.7, respectively. The phase and amplitude imbalance of the transceivers are 0.5 • and 0.1 dB, respectively, and the phase noise dat is taken from [18], [14]. Case 1: No Reflections from the Environment Firstly, the SI consists of only the signal leaking through the antenna from the transmitter to the receiver.…”

Section: Numerical Examplesmentioning

confidence: 99%

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Analog Self-Interference Cancellation with Automatic Gain Control for Full-Duplex Transceivers

Tapio

Sonkki

Juntti

2018

2018 IEEE 87th Vehicular Technology Conference (VTC Spring)

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The main challenge in full-duplex transceiver design is the self-interference (SI). Analog SI isolation is performed at radio frequency (RF) by using an antenna design based on the characteristic modes theory and using active cancelation principle. Two different structures based on using a vector downconverter and a complex multiplier are used for analog baseband SI cancellation. Cancellers are tuned using a automatic gain control (AGC) enhanced variable-step steepest descent algorithm while transmitting a data signal to a distant node in half-duplex mode. Simulations show that the inclusion of AGC into the tuning process speeds up the convergence significantly.

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“…Antenna design is based on the characteristic modes theory [13], [14]. The same antenna model was used also in [9], [15], [16]. The RF canceler is shown in Fig.…”

Section: Transceiver and Self-interferencementioning

confidence: 99%

Performance of a Full-Duplex System in Non-Linear and Time-Varying Self-Interference Channel

Tapio

Sonkki

Juntti

2018

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

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The main challenge in full-duplex transceiver design is the self-interference (SI). Analog SI isolation is performed at radio frequency (RF) signal by using an antenna design based on the characteristic modes theory and using active cancelation processing. The RF canceler is tuned using an automatic gain control (AGC) enhanced variable-step steepest descent algorithm while transmitting a data signal. The inclusion of a non-linear power amplifier does not affect the tuning performance, when realistic adjacent channel power ratio cases are considered. However, the changes in the SI channel can have a major impact on the full-duplex link due to need to re-tune the canceler repeatedly. Index terms-Full-duplex, self-interference, link capacity, non-linearity

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Real time adaptive RF and digital self-interference cancellation for full-duplex transceivers

Cited by 9 publications

References 14 publications

Novel Digital Cancelation Method in Presence of Harmonic Self-Interference

Novel Digital Cancelation Method in Presence of Harmonic Self-Interference

Analog Self-Interference Cancellation with Automatic Gain Control for Full-Duplex Transceivers

Performance of a Full-Duplex System in Non-Linear and Time-Varying Self-Interference Channel

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