Digitally-controlled RF self-interference canceller for full-duplex radios

Tamminen, Joose; Turunen, Matias; Korpi, Dani; Huusari, Timo; Choi, Yang-Seok; Talwar, Shilpa; Valkama, Mikko

doi:10.1109/eusipco.2016.7760355

Cited by 46 publications

(20 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, for a transmit power of P s = 1 W = 0 dBW, the Rayleigh fading channels have variances -20 dB and -80 dB for the S-R and R-D channel respectively. The loopback self-interference link is assumed to have Rician fading with shape parameter or K-factor = 30 dB and effective channel gain, including the effect of path loss/passive physical isolation between the transmit and receive chains sharing antennas at the relay through a circulator device, as Ω = −20dB [27] [28]. The Rician channel F is modeled as the sum of a fixed component and a variable (or scattered) component as below…”

Section: Numerical Results and Analysismentioning

confidence: 99%

Optimal Transmission Using a Self-Sustained Relay in a Full-Duplex MIMO System

Malik

2019

IEEE J. Select. Areas Commun.

View full text Add to dashboard Cite

This paper 1 investigates wireless information and power transfer in a full-duplex MIMO relay channel where the self-sustained relay harvests energy from both source transmit signal and self-interference signal to decode and forward source information to a destination. We formulate a new problem to jointly optimize power splitting at the relay and precoding design for both the source and relay transmissions. Using duality theory, we establish closed-form optimal primal solutions in terms of the dual variables, based on which we then design a customized and efficient primal-dual algorithm to maximize the achievable throughput. Numerical results demonstrate the rate gains from using multiple transmit and receive antennas in both information decoding and energy harvesting, and the significant benefit of harvesting energy from self-interference signals. We also extend our analysis to the case when channel state information is only available at receiving nodes and show how our algorithm can optimize the power splitting at the relay for it to remain self-sustained. Through analysis and simulation, we demonstrate that an optimal combination of non-uniform power splitting, variable power allocation, and self-interference power harvesting can effectively exploit a full-duplex MIMO system to achieve significant performance gains over existing uniform power splitting and half-duplex transmissions.

show abstract

Section: Numerical Results and Analysismentioning

confidence: 99%

Optimal Transmission Using a Self-Sustained Relay in a Full-Duplex MIMO System

Malik

2019

IEEE J. Select. Areas Commun.

View full text Add to dashboard Cite

show abstract

“…Ideally, this SI signal should be cancelled to below the original noise floor at the point of receiver decoding so that the SNR is not deteriorated from it. For example, if a TX signal in a WiFi network has an output power of 20 dBm and the receiver noise floor is -90 dBm, it follows that over 110 dB of SI cancellation is necessary for a FD radio to have good performance [5]. There has been a lot of research recently into different techniques to achieve this desired cancellation and they can be divided into three categories: passive suppression, digital cancellation, and analog cancellation depending on which section of the radio that the cancellation occurs.…”

Section: Self Interference Cancellationmentioning

confidence: 99%

“…Alternatively, an RF-VM is used in [5] to replace the tunable attenuator [4]. The use of an RF-VM enabled finer resolution in controlling the magnitude and phase of each tap and an adaptive algorithm is developed to accurately adjust each of them.…”

Section: Analog Cancellationmentioning

confidence: 99%

Digitally Assisted RF-Analog Self Interference Cancellation for Wideband Full-Duplex Radios

King

Xia

Boumaiza

2018

IEEE Trans. Circuits Syst. II

View full text Add to dashboard Cite

The ever-increasing demand for more data from users is pushing the development of alternative wireless technologies to improve upon network capacity. Full-Duplex radios provide an exciting opportunity to theoretically double the available spectral efficiency of wireless networks by simultaneously transmitting and receiving signals in the same frequency band.The main challenge that is presented in the implementation of a full-duplex radio is the high power transmitter leaking to the sensitive receiver chain and masking the desired receive signal to be decoded. This transmitter leakage is referred to as self interference and it is required that this self interference signal be cancelled below the receiver noise floor to achieve the full benefits of a full-duplex radio. Cancellation of the self interference signal is realized through several techniques, categorized as passive suppression, digital cancellation, and analog cancellation. These methods all have their challenges in achieving the full amount of cancellation necessary and therefore all three techniques are typically employed in the system.In this thesis, a novel digitally assisted radio frequency (RF) analog self interference canceller is proposed to suppress the self interference signal before the receiver chain for wide modulation bandwidth signals. This canceller augments minimum complexity RFanalog interference cancellation hardware that uses an RF vector multiplier in combination with a flexible digital rational function finite impulse response filter. The simple topology reduces the number of impairments added to the system through the analog components and identifies the parameters of the proposed filter in a deterministic and single iteration algorithm.The hardware proof-of-concept prototype is built using off-the-shelf RF-analog components and demonstrates excellent cancellation performance. Using four TX test signals with modulation bandwidths of 20 MHz, 40 MHz, 80 MHz, and 120 MHz, the self interference canceller achieves a minimum of 50 dB, 47 dB, 42 dB, and 40 dB of cancellation respectively. This thesis reviews the previously proposed self interference cancellation topologies, system non-idealities that provide challenges for full-duplex implementation, and the realization of the proposed RF-analog self interference canceller.iii Acknowledgements I would like to thank my supervisor, Dr. Slim Boumaiza, for giving me guidance, advice, and confidence throughout my Masters process. He has taught me how to properly conduct research, approach problems and allowed me to pursue a topic that suited my interests. The entire Emerging Radio Systems Group (EmRG) consists of intelligent, kind and helpful members who I have also learned a lot from and enjoyed working with.I would also like to acknowledge my incredible family and friends who have offered continuous love and support throughout this lengthy Masters process.Finally, I would like to dedicate this thesis to my husband, Michael, for his love, patience, and calming influence while pushing ...

show abstract

“…A received SI signal is canceled by a radio-frequency (RF) analog SI canceller. The balun canceller [3] reduces a line of sight (LOS) component of the SI signal, and the multi-tap RF canceller [4] can reduce several delayed SI signals. Digital SI cancellers are necessary to eliminate long delayed and remained SI signals since RF cancellers cannot reduce the power of the SI signal to the noise floor.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Domain Hammerstein Self-Interference Canceller for In-Band Full-Duplex OFDM Systems

Komatsu

Miyaji

Uehara

2017

2017 IEEE Wireless Communications and Networking Conference (WCNC)

View full text Add to dashboard Cite

In-band full-duplex communications have been spotlighted because they can double the spectral efficiency of the current wireless communication systems. However, it is necessary to mitigate the self-interference (SI). Currently, several time-domain and frequency-domain SI cancellers have been proposed. Timedomain SI cancellers are based on the parallel Hammerstein (PH) model, and they have good flexibility with high computational cost. In contrast, frequency-domain SI cancellers can achieve high cancellation performance with low computational cost but they have less flexibility than time-domain PH based SI cancellers. In this paper, we propose a frequency-domain SI canceller based on the PH model. The proposed scheme estimates the frequency response of the SI channel and regenerates SI signals by the overlap-save method. Therefore, the computational complexity of the proposed scheme is less than time-domain PH based SI canceller. The performance of the proposed scheme is assessed by equivalent baseband signal simulations of a fullduplex transceiver. As a result, the proposed scheme achieves high SI cancellation as the time-domain PH based SI canceller with low computational cost. In addition, the convergence performance of the proposed scheme is faster than the time-domain scheme.

show abstract

Digitally-controlled RF self-interference canceller for full-duplex radios

Cited by 46 publications

References 12 publications

Optimal Transmission Using a Self-Sustained Relay in a Full-Duplex MIMO System

Optimal Transmission Using a Self-Sustained Relay in a Full-Duplex MIMO System

Digitally Assisted RF-Analog Self Interference Cancellation for Wideband Full-Duplex Radios

Frequency-Domain Hammerstein Self-Interference Canceller for In-Band Full-Duplex OFDM Systems

Contact Info

Product

Resources

About