Page 15 - ITUJournal Future and evolving technologies Volume 2 (2021), Issue 1

ITU Journal on Future and Evolving Technologies, Volume 2 (2021), Issue 1

Economic efficiency of spectrum allocation
Pages 67–76
Vadim Nozdrin
Spectrum demand is rapidly expanding, driven by the developments of incumbent radio systems, as
well as with the requirements of new technologies and market players to get spectrum access. In this
regard, one of the fundamental functions of the state spectrum regulator is to create an enabling
administrative and legal environment to ensure efficient spectrum use and to mitigate scarcity of this
valuable natural resource. This paper analyses the economic value of spectrum use and suggests an
extension of the spectrum's traditional technical boundaries, in order to take into consideration energy,
environmental, sanitary and bio-geotechnical limits. The study reviews the phenomena of increasing
transaction costs and negative externalities of spectrum access requiring economic criteria and
assessment to achieve optimum resource allocation with a spectrum's demand growth. Results develop
an input-output matrix as an allocation instrument to achieve spectrum efficiency and optimum
equilibrium based on analysis of the economic effects from different band utilization scenarios,
supplemented by currently used technical criteria. Practical application of proposed economic methods
should improve the existing spectrum management system.
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Performance of a parallel Hamming coding in short-frame OFDM sensor's
network
Pages 77–88
Raouia Masmoudi Ghodhbane, Jorge Fernandez‑Mayoralas
In this paper, we focus on the most relevant Error Correcting Codes (ECCs): the Hamming code and
the Reed-Solomon code in order to meet the trade-off between the low implementation complexity and
the high error correction capacity in a short-frame OFDM communication system. Moreover, we
discuss and validate via simulations this trade-off between complexity (Hamming is the easiest to code)
and error correction capability (Reed-Solomon being the most effective). Therefore, we have to either
improve the correction capacity of the Hamming code, or decrease the complexity cost for the Reed-
Solomon code. Based on this analysis, we propose a new design of parallel Hamming coding. On the
one hand, we validate this new model of parallel Hamming coding with numerical results using
MATLAB-Simulink tools and BERTool Application which makes easier the Bit Error Rate (BER)
performance simulations. On the other hand, we implement the design of this new model on an FPGA
mock-up and we show that this solution of a parallel Hamming encoder/decoder uses a few resources
(LUTs) and has a higher capability of correcting when compared to the simple Hamming code.
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