Resumo

PAZ PENAGOS, Hernán et al. Cognitive radio technology in the UHF band. Tecnura [online]. 2014, vol.18, n.39, pp.138-151. ISSN 0123-921X.

Abstract Mobile cellular communication companies in Colombia require more spectrum resources to expand their portfolio of services. However, additional frequency bands for that particular purpose are scarce, yet it is well known that there are many underutilized licensed bands. Therefore new radio technologies are being studied in order to solve this problem, e.g. Software Defined Radio SDR [1] Cognitive Radio CR [2] and Dynamic Spectrum Access DSA [3]. These strategies recommend mobility across the radio spectrum to meet various needs and achieve greater efficiency when managing such a scarce resource. In this context, a case study is presented in an attempt to examine the requirements that must be met for the implementation of cognitive radio networks in Bogota. The case study includes evaluation for the possibility of migration from cellular communications to cognitive radio since the bands assigned to Ultra-High Frequency UHF television offer possible free-of-interference coexistence between the two services (i.e. Cellular and TV). The study shows feasibility to migration; however, the implementations of cognitive radio need availability of hardware, software and flexible radio platforms.

Palavras-chave : UHF band; mobile cellular communications; cognition radio; migration.

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