Nonlinear Digital Cancellation in Full-Duplex Devices Using Spline-Based Hammerstein Model

Campo, Pablo Pascual; Korpi, Dani; Anttila, Lauri; Valkama, Mikko

doi:10.1109/glocomw.2018.8644362

Cited by 24 publications

(39 citation statements)

References 13 publications

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“…The most problematic RF impairments are the IQ mixer imbalance and PA nonlinearity [31]. To deal with these impairments, Hammerstein cancellers [12], [16], [23]- [30] have been developed. This type of canceller estimates channel responses for all nonlinear basis functions by applying a least-squares estimation.…”

Section: B Review Of Previous Research: Digital Approachmentioning

confidence: 99%

“…In [51], a transmission power optimization technique was proposed for full-duplex multi-antenna relay systems. In [52], the conditions under which half-duplex or full-duplex mode have higher spectral efficiency and an opportunistic [13] Widely Linear [22] Hammerstein [12], [16], [23]- [30] Auxiliary Receiver [31]- [33] [34] [35] [36] Volterra Series [37]- [39] Our Proposed mode selection scheme were studied. Precoding techniques of MIMO systems and power optimization techniques of relays are used in conjunction with digital self-interference cancellers.…”

Section: B Review Of Previous Research: Digital Approachmentioning

confidence: 99%

“…Detailed derivations of (26)- (30) are provided in Appendix A. We also define the operator F, which denotes cyclic prefix (CP) removal and discrete Fourier transform for each OFDM symbol, and an operator F −1 , which denotes the inverse discrete Fourier transform of each OFDM symbol.…”

Section: A Definitions Of Operatorsmentioning

confidence: 99%

“…A. Derivations of (26)- (30) The relation of the input x and output y of an estimated nonlinear amplifier ∈ {tx, rx} can be written as…”

Section: Appendixmentioning

confidence: 99%

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Iterative Nonlinear Self-Interference Cancellation for In-Band Full-Duplex Wireless Communications Under Mixer Imbalance and Amplifier Nonlinearity

Komatsu

Miyaji

Uehara

2020

IEEE Trans. Wireless Commun.

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This paper presents an iterative estimation and cancellation technique for nonlinear in-band full-duplex transceivers with IQ imbalances and amplifier nonlinearities. The estimation process of the proposed scheme consists of three stages, namely, the channel response estimation, IQ imbalance estimation, and power amplifier and low-noise amplifier (LNA) nonlinearities estimation. For the estimation of the parameters and improvement of the accuracy, distortions are compensated by cancellation or inversion with the latest estimated parameters. On the one hand, the channel response is estimated on the time domain; on the other hand, the IQ imbalance and nonlinearities are estimated on the frequency domain for a more straightforward estimation and superior accuracy. In the cancellation process of the proposed scheme, the received signal is compensated with the estimated parameters of the LNA and receiver IQ imbalance before cancellation because the desired signal is received with a high-power self-interference and is distorted by the radiofrequency receiver impairments. Simulation results show that the proposed technique can achieve higher cancellation performance compared with the Hammerstein canceller when the LNA is saturated by the self-interference. Additionally, the performance of the proposed canceller converges much faster than that of the Hammerstein canceller.

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Section: B Review Of Previous Research: Digital Approachmentioning

confidence: 99%

Section: B Review Of Previous Research: Digital Approachmentioning

confidence: 99%

Section: A Definitions Of Operatorsmentioning

confidence: 99%

“…A. Derivations of (26)- (30) The relation of the input x and output y of an estimated nonlinear amplifier ∈ {tx, rx} can be written as…”

Section: Appendixmentioning

confidence: 99%

See 2 more Smart Citations

Iterative Nonlinear Self-Interference Cancellation for In-Band Full-Duplex Wireless Communications Under Mixer Imbalance and Amplifier Nonlinearity

Komatsu

Miyaji

Uehara

2020

IEEE Trans. Wireless Commun.

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“…Digital cancellation algorithms accounting for these impairments have been proposed in earlier literature [8], [15]- [26]. The works in [8], [17], [26] focused on the power amplifier induced nonlinear distortion and its digital cancellation; [20]- [22] opted to linearize the PA with digital predistortion, and utilized simpler SI models in digital cancellation; in [18], [19], receiver LNA distortions were considered; [15], [27] studied the effects of I/Q mismatches on both TX and RX sides, and proposed cancellation algorithms for them. Some works have also considered multiple impairments [16], [23]- [25].…”

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.

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A Real-Time Wideband Subband LMS Algorithm for Full-Duplex Communications

et al. 2022

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In-band full-duplex (IBFD) communications has the potential to nearly double the spectrum efficiency of existing 5G communications. Digital signal processing to mitigate self-interference is one way to realize this full-duplex capability. However, the aggregated wideband nature of 5G coupled with the potential for large delay spreads and short coherence times makes the realistic implementation of such an IBFD processor challenging. In this paper, we address the architectural considerations and describe the practical implementation of a real-time IBFD digital processor and its performance when operating on wideband data collected in a highly dynamic environment.INDEX TERMS Adaptive filters, least mean square methods, radio transceivers, radio communication.

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Nonlinear Digital Cancellation in Full-Duplex Devices Using Spline-Based Hammerstein Model

Cited by 24 publications

References 13 publications

Iterative Nonlinear Self-Interference Cancellation for In-Band Full-Duplex Wireless Communications Under Mixer Imbalance and Amplifier Nonlinearity

Iterative Nonlinear Self-Interference Cancellation for In-Band Full-Duplex Wireless Communications Under Mixer Imbalance and Amplifier Nonlinearity

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

A Real-Time Wideband Subband LMS Algorithm for Full-Duplex Communications

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