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학술지 Enabling Technologies toward Fully LTE-Compatible Full-Duplex Radio
Cited 11 time in scopus Download 17 time Share share facebook twitter linkedin kakaostory
저자
노고산, 왕한호, 신창용, 김승현, 전영일, 신현철, 김진업, 김일규
발행일
201703
출처
IEEE Communications Magazine, v.55 no.3, pp.188-195
ISSN
0163-6804
출판사
IEEE
DOI
https://dx.doi.org/10.1109/MCOM.2017.1600791CM
협약과제
16HF1300, 평창 동계올림픽 5G 통신서비스 지원을 위한 차세대 통신네트워크 기술개발, 정현규
초록
Full-duplex radio has potential to double spectral efficiency by simultaneously transmitting and receiving signals in the same frequency band, but at the expense of additional hardware and power consumption for self-interference cancellation. Hence, the deployment of a full-duplex cellular network can be realized by employing full-duplex functionality only at an eNodeB, which is supposed to have sufficient computation and power resources, and by scheduling pairs of half-duplex UEs that are in either downlink or uplink. By doing so, fast and smooth full-duplex deployment is possible while minimally affecting the legacy UEs and the rest of the network entities. In this article, we provide technical challenges and solutions for an LTE-compatible full-duplex cellular network, featuring wideband and wide dynamic range support for RF self-interference cancellation, and robust and efficient self-interference channel estimation for digital self-interference cancellation. Based on a realistic LTE-based cellular model, our full-duplex radio design is evaluated through system-level simulations and real-world testbed experiments. Simulation results show that a significant throughput gain can be achieved by the full-duplex technique despite the existence of physical limiting factors such as path loss, fading, and other-cell interference. Testbed measurements reveal that at a bandwidth of 20 MHz, self-interference cancellation up to 37 dB is achieved in the RF domain, and most of the residual self-interference is further cancelled down to the noise floor in the subsequent digital domain.
KSP 제안 키워드
Cellular Model, Cellular networks, Channel estimation(CE), Enabling technologies, Full-Duplex(FuDu), Half-Duplex(HD), Limiting factors, Path loss, Power Consumption, RF self-interference cancellation, Real-world testbed