Guard Band Protection Scheme to Facilitate Coexistence of 5G Base Stations and Radar Altimeters
Abstract
:1. Introduction
- A guard band protection scheme to enable the coexistence of 5G base stations and radar altimeters has been proposed;
- A filter to mitigate the out-of-band spectral emissions of the 5G waveform has been developed to improve the performance of ACLR;
- The Monte Carlo method has been employed to validate the effectiveness of the proposed guard band protection scheme.
2. Modelling for Guard Band Protection and Analysis
2.1. Mathematical Model for Guard Band Protection
2.2. ACLR
2.3. ACS and ACIR
3. Numerical Results
3.1. Rural Areas
3.2. Suburban Areas
3.3. Urban Areas
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameters | Unit | Value |
---|---|---|
Model | DL-FRC-FR1-QPSK | |
Channel bandwidth | MHz | 100 |
Subcarrier spacing | kHz | 30 |
Duplexing mode | TDD | |
Cell identity | 1 | |
Windowing | % | 0 |
Sampling rate | Hz | 614,400,000 |
Parameters | Unit | Value |
---|---|---|
Carrier frequency | GHz | 3.7–4.0 |
BS channel bandwidth | MHz | 100 |
UE channel bandwidth | MHz | 20 |
BS antenna height | m | Rural: 35 Suburban: 25 Urban: 20 |
Antenna array | 4 × 4, 8 × 8, and 16 × 16 | |
Vertical 3-dB beamwidth | ◦ | 65 |
Horizontal 3-dB beamwidth | ◦ | 90 |
Vertical element spacing | 0.5λ | |
Horizontal subarray spacing | 2.1λ | |
Building height average | m | 5 |
Body loss | dB | 4 |
Polarisation loss | dB | 3 |
Noise temperature | K | 290 |
Modulation | QPSK [28] | |
Centre frequency | GHz | 3.95 |
Front-to-back ratio | dB | 30 |
Elevation angle | ◦ | [−90, 90] |
Azimuth angle | ◦ | [−180, 180] |
Polarisation | ◦ | 45 |
Duplexing | TDD | |
Mechanical down tilt angle | ◦ | Rural: 3 Suburban: 6 Urban: 10 |
Cell radius | m | Rural: 1200 Suburban: 600 Urban: 300 |
Transmitted power | dBm | Rural: 71 [29] Suburban: 68 Urban: 68 |
Element gain | dBi | 6.4 |
UE antenna height | m | 1.5 |
Parameters | Unit | Value |
---|---|---|
Nominal centre frequency | GHz | 4.3 |
Channel bandwidth | MHz | 196 [30] |
Carrier frequency | GHz | 4.2–4.4 |
Maximum antenna gain | dB | 10 |
Noise figure | dB | 6 |
Cable loss | dB | 6 |
−3 dB beamwidth | ◦ | 55 |
Modulation | FMCW | |
Landing downward angle | ◦ | 15 [31] |
Landing speed average | m/s | 74.588 [32] |
Fuselage length | m | 39.5 [33] |
Interference protection criteria | dB | −6 |
Environment | Antenna Array | Received Interference (dB) |
---|---|---|
Rural | 4 × 4 8 × 8 16 × 16 | 34.3446 40.3652 46.3858 |
Suburban | 4 × 4 8 × 8 16 × 16 | 22.3548 28.3754 34.396 |
Urban | 4 × 4 8 × 8 16 × 16 | 12.0633 18.0839 23.6751 |
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Li, J.; Hwang, S.-H. Guard Band Protection Scheme to Facilitate Coexistence of 5G Base Stations and Radar Altimeters. Electronics 2024, 13, 3681. https://doi.org/10.3390/electronics13183681
Li J, Hwang S-H. Guard Band Protection Scheme to Facilitate Coexistence of 5G Base Stations and Radar Altimeters. Electronics. 2024; 13(18):3681. https://doi.org/10.3390/electronics13183681
Chicago/Turabian StyleLi, Jiaqi, and Seung-Hoon Hwang. 2024. "Guard Band Protection Scheme to Facilitate Coexistence of 5G Base Stations and Radar Altimeters" Electronics 13, no. 18: 3681. https://doi.org/10.3390/electronics13183681
APA StyleLi, J., & Hwang, S.-H. (2024). Guard Band Protection Scheme to Facilitate Coexistence of 5G Base Stations and Radar Altimeters. Electronics, 13(18), 3681. https://doi.org/10.3390/electronics13183681