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Energy optimisation of an OOK transmitter using high-order orthogonal modulation

In this paper, we show that high-order orthogonal modulation can be used to optimize the power consumption of an energy efficient On-OFF Keying (OOK) transmitter for short range wireless sensor applications. Our work is based on the characteristics of a high performance OOK modulator which completely turns off during the transmission of zeroes and provides energies per bit in the picojoule range. We take into account the limitations of the circuit in terms of maximum modulation rate and constant output power. Based on a bit error rate performance analysis and a circuit energy model, we propose an original approach to find the energy optimal modulation order for a given range constraint. When considering only the transmitter power consumption, a large improvement in energy per bit can be obtained by using this optimization. When considering a residual power consumption during the transmitter off state, an improvement is still obtained but is less important.

Auteur(s) : Yue Penga, Guillaume Andrieuxb, Jean-Francois Diourisb and Magaye Diopc aLogistics Engineering College, Shanghai Maritime University, Shanghai 200135,
Année de publication : 2018
Revue : International Journal of Electronics / International Journal of Electronics Letters
Type : Article
Mise en ligne par : DIOP Magaye