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Cognitive Radio Satellite Networks for Space-Time Communications and Its Management

Praveen Kumar Singh, Simran Maheshwari

Abstract


This paper presents initial results of the recently kicked-off FP7 ICT STREP project “Cognitive Radio for Satellite Communications” (CoRaSat) and, an interference management for multi-beam satellite network to enhance spectral efficiency is studied Focus is put on the preliminary identification of the scenarios which are suitable for the applicability of Cognitive Radio technology over Satellite Communications and the second focus is on a two-satellite for future generation satellite network using cognitive radio technology is provided (SatCom). The considered frequency bands include Ka-band, Ku-band, C-band and S-band, where regulatory and coordination constraints exist. An initial mapping of broadband and narrowband SatCom use cases on each identified scenario is also provided. Moreover, several challenges associated to the applicability of Cognitive Radio over SatCom in the identified scenarios are presented, which form the basis of the market/business, regulatory, standardization and technological framework of CoRaSat. Furthermore, ongoing and future work of the CoRaSat project is outlined. This network is composed of a secondary satellite and a primary satellite where the primary satellite system does not suffer from severe destructive interferences coming from the secondary satellite system. Upward/downward link power is assumed to be fixed and no power control is used. Therefore, the received data from each beam has a specific level. Also, a novel bandwidth sharing algorithm is provided for the first time. Next, total rate for both primary and secondary satellite systems are computed. Furthermore, receiver operating characteristic (ROC) curve and numerical results based on the number of antennas and threshold levels are given.

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References


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DOI: https://doi.org/10.37591/jscrs.v3i1.590

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