Digital and RF interference cancellation for single-channel full-duplex transceiver using a single antenna

Abstract

This paper presents a full-duplex transceiver system design operating with a single channel using a single antenna for both transmitting and receiving paths. To implement such a system, the self-interference is necessary to be eliminated. From literatures on RF interference cancellation, there has not been any suitable technique to deal with a single antenna. In this light, this work initially proposes the technique to cancel the self-interference by utilizing on-the-shelf components. The measurement results indicate thatthe proposed systemcan reducethe level of self-interference about 75 dB, which is better than others in literatures.

Wideband full-duplex MIMO relays with blind adaptive self-interference cancellation

“…Isolation methods [13], [18], [19] reduce SI power by optimizing the radiation pattern and improving the passive electromagnetic isolation between antenna arrays. Although isolation can reduce the interference by tens of decibels, the remaining residual SI in the system is likely high enough to affect the performance.…”

“…Matrix P[n] ∈ C M LA×M LA is efficiently updated by applying the matrix inversion lemma to the recursive update of the auto-correlation matrix in (19), i.e.,…”

Optimum Single Antenna Full Duplex Using Hybrid Junctions

“…The multi-antenna techniques mentioned above are well suited to applications such as cellular basestations, however the increase in device cost and size due to the additional antennas make these techniques less attractive for smaller devices such as smartphones and tablet computers. Single antenna full duplex systems have been reported in [4], [29]. These implementations use circulators to provide some level of TX-RX isolation (around 15-20dB) in the antenna coupling network, however, circulators are also an unattractive option due to their cost, size, and limited bandwidth.…”

Effective Self-Interference Cancellation for SSD(Simultaneous Single Band Duplex) System

“…따라서 이러한 자기 간섭 신호 는 적절한 자기 간섭 제거 기술을 이용하여 제거한다. 일 반적으로 잘 알려진 자기 간섭 제거 기술로는 RF(Radio Frequency) Cancellation과 Digital Cancellation이 있다 [6], [7] . [9] .…”