Oblique projection based receiver with interference cancellation in OFDMA uplink

Huang, Jie-Liang; Fang, Wen‐Hsien; Cheng, Po Wen

doi:10.1109/icasid.2012.6325344

Cited by 7 publications

(1 citation statement)

References 15 publications

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“…The orthogonal projector is a special example of the oblique projector. Huang et al investigates signal detection based on orthogonal frequency division multiple access system using successive interference cancellation. The oblique projection mitigates the intercarrier and multiuser interference, and in addition, it processes blind identification .…”

Section: Introductionmentioning

confidence: 99%

Oblique projection: An interference mitigation for MIMO multihop full‐duplex relay

Fadoul

Hindia

Dimyati

et al. 2019

Trans Emerging Tel Tech

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Full-duplex (FD) assisted multiple-input-multiple-output relaying increases the spectral efficiency through efficient spectrum utilization. The major concerns for the FD assisted relay system are the cancellation of inter-relay interference (IRI) and relay self-interference (RSI). Previous works were idealized only on the basis of either RSI or IRI; hence, all other realistic models to overcome the RSI or IRI were unappreciated. This paper aims to reduce the interference-to-signal ratio. We propose the joint relay's receive beamforming based on oblique projection to mitigate the RSI and IRI in multihop environments. Applying first orthogonal projectors to the relay's received signal, the relay's received signals are divided into interference subspace and signal subspace. Then, the desired signal is recovered from signal subspace by using oblique projection that cancels out the RSI and IRI. The geometric interpretation of oblique projection is analyzed to understand its properties. The major merit of this method is that it can be adopted even when the RSI and IRI channels are unknown. In comparison to the existing interference cancellation methods, the signal-to-interference ratio of our proposed method does not deteriorate even when the transmit power is high. Additionally, we demonstrate that the oblique projection output is equivalent to an orthogonal projection using geometrical interpretation, simulation, and theoretical derivation.Trans Emerging Tel Tech. 2020;31:e3799.wileyonlinelibrary.com/journal/ett

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Section: Introductionmentioning

confidence: 99%