Design and Implementation of Full‐duplex Transceivers

Haneda, Katsuyuki; Valkama, Mikko; Riihonen, Taneli; Antonio-Rodríguez, Emilio; Korpi, Dani

doi:10.1002/9781119116493.ch17

Cited by 4 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7) Derive the first order scattered paths from the mobile scatterers using their current position. 8) Calculate the channel transfer function as (12) combining all the paths depending on the desired system bandwidth and frequency spacing. 9) Update the position of the mobile scatterers for the next timestep.…”

Section: Implementation Recipementioning

confidence: 99%

“…7 shows an exemplary geometry for a single time instant, where the diffuse scatterers are located adjacent to the smooth walls. The channel transfer functions (12) are derived for the same frequency band as measurements, i.e., between 2.45 and 2.75 GHz with 0.5 MHz resolution. The IFFT of the transfer function results in the band-limited CIRs.…”

Section: Channel Model Validationmentioning

confidence: 99%

“…I N-BAND FULL-DUPLEX (IBFD) transceivers [1]- [12], which can simultaneously transmit and receive radio frequency (RF) signals in the same frequency band, have the potential to provide as much as double the capacity compared to traditional half-duplex systems, and reduce latency in wireless networks [6]. Transmitting and receiving on the same time-frequency resource results in strong co-channel selfinterference (SI), which can be over 100 dB more powerful than the desired receive signal.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Geometry-Based Modeling of Self-Interference Channels for Outdoor Scenarios

Venkatasubramanian

Zhang

Laughlin

et al. 2019

IEEE Trans. Antennas Propagat.

Self Cite

View full text Add to dashboard Cite

In-band full-duplex (IBFD) transmission has the potential to nearly double the throughput by improving the spectral efficiency. The main bottleneck is the self-interference (SI) at the transceiver due its own transmission, which can suppress the desired signal. Compact on-frequency repeaters are suitable candidates for initial implementation of IBFD, where, the design and evaluation of SI cancellation techniques require realistic SI channel models. In this article, we characterise measured MIMO SI channels as a two-dimensional site-specific geometrybased stochastic channel model (GSCM), including smooth walls causing specular reflections, diffuse scatterers along the smooth walls, and mobile scatterers like pedestrians and vehicles. The model provides delay, angular and polarimetric characteristics of the MIMO SI channels, and is validated by comparing the measured and simulated channels in delay, Doppler and spatial domains.

show abstract

Section: Implementation Recipementioning

confidence: 99%

Section: Channel Model Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geometry-Based Modeling of Self-Interference Channels for Outdoor Scenarios

Venkatasubramanian

Zhang

Laughlin

et al. 2019

IEEE Trans. Antennas Propagat.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Digital cancellers based on iterative optimisation have also been widely studied [9], [10]. To investigate the tracking performance of a typical iterative canceller a user interaction scenario, a least mean squares (LMS) based digital canceller has also been implemented (in place of the idealised digital canceller), as shown in Fig.…”

Section: Least Mean Squares Adaptive Digital Cancellermentioning

confidence: 99%

In-band Full-duplex in Hand-held Applications: Analysis of Canceller Tuning Requirements

Laughlin

Zhang

Beach

et al. 2018

2018 Wireless Advanced (WiAd)

View full text Add to dashboard Cite

This paper investigates the impact of user-antenna interaction on transmit-to-receive (Tx-Rx) isolation in a handheld In-band Full-duplex (IBFD) transceiver. Dynamic antenna measurements which capture the effect of user hand movements at 1900 MHz are incorporated into simulations of a two stage adaptive self-interference canceller, which simulates an electrical balance duplexer and a second stage of digital cancellation with different tracking adaptation rates. Results demonstrate that the dynamic self-interference channel which results from user movement places demanding requirements on the canceller coefficient tracking. Adaptation intervals of the order of tens of microseconds are required to maintain Tx-Rx isolation of the order of 90 dB, calling into question the feasibility of IBFD handheld devices.

show abstract