5G Cellular and Fixed Satellite Service Spectrum Coexistence in C-Band

Abstract

The C-Band (3.4-4.2 GHz) is a cornerstone for many satellite services including Fixed Satellite Service (FSS), in particular above 3.6 GHz. The large geographic coverage of C-band satellite beams represents a cost-effective communication solution, while its robustness to weather impairments makes C-band the most suitable band to guarantee high service availability. On the other hand, C-band has long been a top candidate for the deployment of 5G-cellular systems because it is a mid-band spectrum, blending the signal reach of lower bands with the capacity of higher bands. The potential assignment of C-band to the 5G cellular systems is seen as a threat by the satellite operators, who are concerned about the interference that the 5G-cellular system may cause to their services, potentially leading to service interruption and causing a serious economic impact. This paper presents the interference studies of 5G cellular systems operating in the below 6 GHz band in both the adjacent channel and co-channel scenarios. We present a detailed analysis for both 5G-celullar downlink and uplink, considering the impact of out-of-band emissions, potential Low-Noise Block (LNB) saturation at the FSS Earth station receiver and the consequences of the deployment of Active Antenna Systems (AAS) in the terrestrial Base Stations (BSs). The outcomes of this paper aim to shed some light to spectrum regulators and other related stakeholders regarding the impact of the future deployment of 5G-cellular systems in the FSS Earth station receivers operating in C-band. The paper also propose and evaluates potential techniques that can be applied to facilitate the coexistence of both systems, e.g. switching off critical emitters or backing-off their transmit power.

Performance of the DBS Satellite Receiver under the Impact of Rainfall and Terrestrial Interference

“…A number of publications reported the research in the field of concurrently operating the terrestrial fixed service (FS) with satellite services (SS) (broadcasting (BSS) and fixed (FSS)), in different spectrum frequency bands [4,[7][8][9][10][11][12][13][14][15][16][17][18]. Most researches mainly study the performance of satellite receiver affected by the FS system based on spectrum sharing policies between the dissimilar systems.…”

“…In [9,10,12,17,18], the clear sky condition was considered at the operating frequency bands for the two systems that are less than 6 GHz (C-band and L-band), while various studies were carried out on higher frequency bands within (17.3-19.7 GHz) [11,[13][14][15][16]. All these studies discussed the interference impact on the satellite service from the FS system.…”

Optimizing number of spots and cluster size of a high‐throughput communication satellite payload

“…It is worth noting that the maximum incident interference power in a satellite ground station antenna aperture must be lower than the input noise power by an amount of 10 dB 26 . Using the link parameters in Section 6.4, the noise power in the user terminal and gateway receiver for a bandwidth of 40 MHz is −97.7 dBm.…”

A Compact C-Band Bandpass Filter with an Adjustable Dual-Band Suitable for Satellite Communication Systems

“…As the mass and size of the on-board devices have a significant effect on the cost, reducing the footprint without compromising the filter performance becomes an important priority. Hence, the satellite communications industry has created a demand for low-mass narrowband low-loss filters with high selectivity [13][14][15]. As a result, affordability and compactness have become two critical requirements of microwave filters and other electromagnetic components used in the upcoming new generation of low-cost Satcom systems, where satellite communication-on-the-move will become a part of everyday life [12][13][14][15][16][17][18][19].…”