Waveform Design for Energy Efficient OFDM Transmission

In this chapter, a green radio transmission using the binary phase-shift keying (BPSK) modulated orthogonal frequency-division multiplexing (OFDM) signal is addressed. First, the OFDM transmission signal is clearly stated. For a specified performance of the system, the least transmit power occurs by the optimal OFDM shape, which is designed to minimize the average inter-carrier interference power taking into account the characteristic of the transmit antenna and the detection process at the receiver. The optimal waveform is obtained by applying the calculus of variations, which leads to a set of differential equations (known as Euler equations) with constraint and boundary conditions. Results show the transmission effectiveness of the proposed technique in the shaping of the signal, as well as its potential to be further applied to smart context-aware green wireless communications.

Appreciating Green Radio Communication Network Systems in a Problem-Oriented Project-Based Learning Environment A Theoretical Framework

The aim of this article was to present a POPBL theoretical framework for the teaching, learning and research in Green Radio Communication Network Systems. To this effect, a content analysis and synthesis of related scientific literature, models and frameworks was carried out based on the research tittle and key words. The article analyses and syntheses centred on the importance of green radio communication, principal factors in green communication as well as the process components. Also in the content analysis and synthesis are the POPBL elements, processes and related theories with the resulting instructional benefits. The resulting framework has the potentials of developing the generic skills like problem solving, team work, creativity, critical thinking and continues learning which have the potentials of achieving the goals of GRCNS.