Advanced architectures for self-interference cancellation in full-duplex radios: Algorithms and measurements

Korpi, Dani; Aghababaeetafreshi, Mona; Piililä, Mauno; Anttila, Lauri; Valkama, Mikko

doi:10.1109/acssc.2016.7869639

Cited by 9 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The variance of the parameter also the Cramer-Rao bound of theh at andh bt are the diagonal elements of the inverse Fisher information matrix (19) using (27) are…”

Section: Crlb For the Proposed Methodsmentioning

confidence: 99%

“…Different estimators are proposed for FDX systems to estimate the SI channel and perform cancellation at different stages of data recovery. The suppression of selfinterference is addressed at different stages of processing both in analog [12]- [18], and digital domains [19]- [27]. An additional receiver chain was proposed [12] to obtain a reference signal for digital SI cancellation.…”

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

Channel Estimators for Full-Duplex Communication Using Orthogonal Pilot Sequences

2020

View full text Add to dashboard Cite

Full-duplex communication is desirable to maximize the spectral efficiency, despite the challenges it puts forth. The key challenge inhibiting the operation of radios in full-duplex mode is selfinterference. In this paper, we propose a pilot-based channel estimation to estimate both self-interference and communication channels simultaneously at both ends of a full-duplex link using orthogonal sequences. The Cramer-Rao Lower Bound for estimators of both the channels was determined and compared with the halfduplex channel estimator. We performed simulations varying sequence length and channel taps and studied the performance of the estimators. We also studied the effect of synchronization between the sequences on the performance of the estimators. Thus, providing a solution to balance the trade-off between the accuracy of the channel estimation and the overhead added to the transmissions for full-duplex communication. INDEX TERMS Channel estimation, orthogonal m-sequences, full-duplex (FDX), half-duplex (HDX), self-interference (SI), Cramer-Rao Lower Bound (CRLB).

show abstract

“…The variance of the parameter also the Cramer-Rao bound of theh at andh bt are the diagonal elements of the inverse Fisher information matrix (19) using (27) are…”

Section: Crlb For the Proposed Methodsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Channel Estimators for Full-Duplex Communication Using Orthogonal Pilot Sequences

2020

View full text Add to dashboard Cite

show abstract

“…Combined with a balun, they are In conjunction with their analog suppression, they are able to obtain total isolation of up to 103 dB for a 10 MHz signal. 2016 saw an implementations of nonlinear parallel Hammerstein based model implemented on an FPGA of a NI PXIe-7972R module [31]. This implementation relies on precomputed basis functions stored on a random-access memory (RAM) to reduce implementation complexity, demonstrating nonlinear digital cancellations of up to 35 dB, taking into account the nonlinear behaviour of the PA. On top of that, a total SI isolation of 94.9 dB is reported, utilizing an active RF canceller.…”

Section: A Functional Validation Of the Cancellermentioning

confidence: 99%

“…The only real-time implementations published so far, where actual real-time experiments are conducted, are, to the authors' knowledge, [29]- [33]. Out of these, nonlinear digital SI cancellation has been implemented only in [31]. These papers will be discussed in more details in Section V-A.…”

Section: Introductionmentioning

confidence: 99%

Full-Duplexing With SDR Devices: Algorithms, FPGA Implementation, and Real-Time Results

Anttila

Lampu

Hassani

et al. 2021

IEEE Trans. Wireless Commun.

Self Cite

View full text Add to dashboard Cite

“…After the practical results of the in-band full-duplex (IBFD) system 1,2 were first reported, various approaches to realize IBFD systems have been explored. [3][4][5][6][7][8][9][10][11][12][13][14][15] Compared with the conventional frequency division duplex, the IBFD has a double frequency spectrum efficiency, because it simultaneously transmits and receives signals on the same frequency. As transmitter and receiver use the same frequency, some portion of strong transmitting (Tx) signals is leaked to the receiving (Rx) port and serves as a type of self-interference.…”

Section: Introductionmentioning

confidence: 99%

A magnetic‐free in‐band full‐duplex RF front‐end with antenna balancing structure

Jeong

Chaudhary

Jeong

2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

In this article, a design of magnetic-free in-band full-duplex (IBFD) RF frontend with antenna balancing structure is presented. The proposed magneticfree IBFD RF front-end consists of 3 dB hybrid couplers, a Wilkinson power divider, two transmitter (Tx) antennas, and two receiver (Rx) antennas. The proposed IBFD RF front-end can be implemented and integrated at high frequencies because all the components used in the circuit are non-magnetic devices. Proposed IBFD RF front-end eliminated the 3-dB Tx insertion-loss of the Balun and transformer in conventional IBFD RF front-ends using antenna balancing structure. Moreover, there is no noise figure degradation at Rx because it realized only a passive circuit. The mathematical analysis of the cancellation characteristics between two different signals with magnitude and phase difference variations according to the normalized frequencies is presented. Accordingly, the broadband out-of-phase balancing power splitter and the antenna balancing structure are adopted to achieve broadband SIC. In order to verify the electrical performances of the proposed magnetic-free IBFD RF front-end, it was implemented at the 2.5 GHz WiMax frequency band. When the fabricated IBFD RF front-end was operated with antenna balancing structure, the measurement results show that the 60 dB SIC bandwidth and maximum SIC were 113 MHz (2.446 -2.559 GHz) and 75.6 dB, respectively.

show abstract

Advanced architectures for self-interference cancellation in full-duplex radios: Algorithms and measurements

Cited by 9 publications

References 15 publications

Channel Estimators for Full-Duplex Communication Using Orthogonal Pilot Sequences

Channel Estimators for Full-Duplex Communication Using Orthogonal Pilot Sequences

Full-Duplexing With SDR Devices: Algorithms, FPGA Implementation, and Real-Time Results

A magnetic‐free in‐band full‐duplex RF front‐end with antenna balancing structure

Contact Info

Product

Resources

About