Spectral Coexistence of IMT-2020 with Fixed-Satellite Service in the 27-27.5 GHz Band

Cho, Yeongi; Kim, Hyunki; Ahiagbe, Ernest Edwin; Jo, Han-Shin

doi:10.1109/ictc.2018.8539378

Cited by 8 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To improve upon these weaknesses, the authors perform an initial study to calculate the interference of IMT-2020 at the satellite for FSS using IMT-2020 modeling, propagation loss, and terrain data proposed in ITU-R Recommendation [20], [21]. As in previous studies, interference analysis is only performed with an FSS satellite, but the interference received by the EESS satellite allocated to the adjacent channel by IMT-2020 is not considered.…”

Section: B Previous Studies and Contributionsmentioning

confidence: 99%

Coexistence of 5G With Satellite Services in the Millimeter-Wave Band

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this study, a new method is proposed to confirm the possibility of coexistence between the existing satellite services and potential fifth-generation (5G) cellular services in the millimeter-wave band according to the frequency-designation agenda of International Mobile Telecommunications (IMT)-2020 for 5G. To evaluate the accumulated interference power of numerous 5G systems distributed globally at a satellite receiver, we extend the satellite's interference reception area to the entire coverage area, from which only the land area is extracted using the geospatial terrain data of Earth in three dimensions. This enables more accurate interference assessment than conventional methods that only consider the footprint of the satellite's 3-dB beamwidth. We also place the IMT-2020 (5G) systems in the coverage area using the IMT-2020 parameters and modeling documents for the International Telecommunication Union's coexistence study. The propagation loss is modeled considering the clutter loss, building entry loss, and attenuation from atmospheric gases. Subsequently, we analyze the interference power received by a fixed satellite service (FSS) satellite operating in the same band and an Earth exploration satellite service (EESS) passive sensor operating in an adjacent channel. Our simulation shows that the FSS satellite receives up to 7.9dB more interference than that obtained from the existing method. Although this is a substantial difference, we find that the protection criteria is still satisfied. However, all EESS passive sensors do not meet the protection criteria in most scenarios, and additional frequency separation or interference mitigation techniques are required to protect these sensors. The proposed method is also applicable to the analysis of non-terrestrial network interference from airships, balloons, unmanned aerial vehicles, etc.

show abstract

Section: B Previous Studies and Contributionsmentioning

confidence: 99%

Coexistence of 5G With Satellite Services in the Millimeter-Wave Band

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The link (b) is generated by communication between the base station (BS) and the user equipment (UE) in the IMT-2020 network, so the FSS satellite receive the radio interference from that. Several studies regarding link (b) have indicated that the co-channel interference from 5G systems to FSS satellites satisfies the protection criteria [15], [16]. The authors of [15] and [16] analyzed the aggregate interference from the IMT-2020 to the FSS satellite at an altitude of approximately 36000 km based on terrain altitude data and proved that the frequency sharing of the two systems is possible.…”

Section: B Related Work and Contributionsmentioning

confidence: 99%

“…Several studies regarding link (b) have indicated that the co-channel interference from 5G systems to FSS satellites satisfies the protection criteria [15], [16]. The authors of [15] and [16] analyzed the aggregate interference from the IMT-2020 to the FSS satellite at an altitude of approximately 36000 km based on terrain altitude data and proved that the frequency sharing of the two systems is possible. Thus, the study of link (a) should be emphasized, which represents the interference from ESIM to IMT-2020.…”

Section: B Related Work and Contributionsmentioning

confidence: 99%

Adjacent Channel Compatibility Evaluation and Interference Mitigation Technique Between Earth Station in Motion and IMT-2020

Kim

Cho

2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

The millimeter wave band is becoming popular for mobile broadband usage such as fifthgeneration (5G) mobile and mobile satellite services utilizing earth stations in motion (ESIM). According to the 2019 World Radiocommunication Conference (WRC-19), the 5G and ESIM systems will operate in adjacent frequency bands bounded by 27.5 GHz; therefore, the adjacent channel compatibility between ESIM and 5G should be verified. Both, the minimum coupling loss (MCL) and Monte-Carlo (MC) methods are applied to assess the worst and most practical interference effects, respectively, for all types of ESIM including the following: maritime ESIM (M-ESIM), land ESIM (L-ESIM), and aeronautical ESIM (A-ESIM). The distance and guard band between the two systems are indicated by the compatibility conditions. In addition to the conventional interference-to-noise ratio (I/N), the throughput loss of a 5G system is proposed to assess the performance degradation caused by the ESIM interference. Two orthogonal frequency division multiplexing (OFDM) waveforms are proposed to suppress ESIM power leakage into an adjacent channel. A mathematical expression regarding the power spectral density (PSD) and frequency dependent rejection (FDR) is derived for these waveforms, suggesting that the interference can be alleviated. A measured single carrier waveform of a commercial ESIM equipment is used as the benchmark against the proposed OFDM waveforms. The windowed OFDM is able to reduce the guard band by 50-77%. The results obtained for various elevation angles of the ESIM antenna are determined to be applicable to various regions globally. INDEX TERMS Adjacent channel compatibility, spectral coexistence study, fifth-generation (5G) cellular mobile communications, earth station in motion (ESIM), fixed satellite service (FSS), orthogonal frequency division multiplexing (OFDM), CP-OFDM, windowed OFDM, power spectral density, frequency dependent rejection, minimum coupling loss (MCL), Monte-Carlo (MC).

show abstract

“…TG [5], [6] . 이러한 점을 보완하기 위해 위성의 간섭 수신 영역을 footprint 영 역에서 전체 영역으로 확장하고, 지형 데이터를 고려하여 육지 지역에 분포되는 IMT-2020만을 고려한 연구까지 확 장되었다 [7] . 반대로 FSS 상향링크에서 IMT-2020이 지구 국으로부터 받는 간섭 분석의 경우, FSS 지구국 주위에 기지국을 배치하고 수신하는 이동국의 스루풋 변화와 그 에 따른 이격거리를 제안하였다 [8] .…”

unclassified

Coexistence between 5G Mobile Communication and Fixed-Satellite Service in the Millimeter Wave Band

Cho¹,

Kim²,

Jo³

2019

J. Korean Inst. Electromagn. Eng. Sci.

Self Cite

View full text Add to dashboard Cite

In this paper, the possibility of spectrum coexistence of 5th generation mobile communications(IMT-2020) and Fixed-Satellite Service(FSS) uplink in the millimeter wave band is studied based on modeling approach and considering the parameters proposed by the international telecommunication union(ITU) for the frequency assignment of IMT-2020. First, in order to protect the existing FSS, the interference signal of IMT-2020 received by an FSS satellite is calculated and its influence on the satellite is analyzed. Then, the interference received by the IMT-2020 from the FSS earth station is calculated and the minimum separation distance required to avoid interference is presented. Finally, the feasibility of coexistence of both services is evaluated based on simulation results.

show abstract

Spectral Coexistence of IMT-2020 with Fixed-Satellite Service in the 27-27.5 GHz Band

Cited by 8 publications

References 7 publications

Coexistence of 5G With Satellite Services in the Millimeter-Wave Band

Coexistence of 5G With Satellite Services in the Millimeter-Wave Band

Adjacent Channel Compatibility Evaluation and Interference Mitigation Technique Between Earth Station in Motion and IMT-2020

Coexistence between 5G Mobile Communication and Fixed-Satellite Service in the Millimeter Wave Band

Contact Info

Product

Resources

About