Abstract
This article presents a new study on the feasibility of operating a direct broadcasting satellite (DBS) system under the effect of both precipitation and interference from a fixed service (FS) at K-band in a semiarid region. The carrier-to-noise plus interference ratio (CNIR) as a protection criterion has been adopted to make sure that the receiver of the DBS system operates with an acceptable performance under rainfall and interference from FS. Various measured data for rainfall in different areas have been utilized to investigate different rain rate exceedance percentages. Results have been shown that areas with high rain rates have a small CNIR at the DBS receiver and require large protection distances compared to low-rain rate areas and vice versa. Some mitigation techniques have been suggested to alleviate the effect of rain and terrestrial interference on the DBS receiver performance.
Highlights
The overcrowding in lower spectrum frequency bands like Cband and Ku-band is predictable to lead new systems to move gradually more to K-band and, in a longer-term, to higher bands [1, 2] such as in the 5G and 6G generation systems
The Saudi Communications and Information Technology Commission (CITC) proposed to use the 21.4– 22 GHz for both the direct broadcasting satellite (DBS) system and fixed service (FS) [7]; this paper will consider the cochannel interference from FS to the DBS system as well as the rain attenuation effect with various rain rate exceedance to investigate the effect of these factors on the DBS system receiver performance and to determine the feasibility of the concurrent operation of the DBS system receiver and FS service
This paper introduced significant results on the operation of the DBS receiver under the influence of precipitation and interference from the FS service at the K-frequency band
Summary
The overcrowding in lower spectrum frequency bands like Cband and Ku-band is predictable to lead new systems to move gradually more to K-band and, in a longer-term, to higher bands [1, 2] such as in the 5G and 6G generation systems. Frequency bands higher than 6 GHz will be highly significant in future systems related to Earth-space connection In those bands, attenuation due to rain represents a dominant factor that reduces the system availability and negatively affects its performance especially in heavy rain areas such as in south Saudi Arabia. The Saudi Communications and Information Technology Commission (CITC) proposed to use the 21.4– 22 GHz for both the DBS system and fixed service (FS) [7]; this paper will consider the cochannel interference from FS to the DBS system as well as the rain attenuation effect with various rain rate exceedance to investigate the effect of these factors on the DBS system receiver performance and to determine the feasibility of the concurrent operation of the DBS system receiver and FS service.
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