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2011
Conference Paper
Titel
Borehole communication with acoustic OFDM
Abstract
In this paper we discuss theory, system design and implementation of an acoustical communication system. We aim to transmit data from the bottom of a borehole to the surface with data rates of at least 200 bps. As a technical solution we use acoustic waveguide communication with adaptive OFDM over a baseband frequency spectrum from 0 to 9 kHz. We characterize hardware components and discuss how to deal with their non-linearities. Furthermore we estimate the signal-to-interference due to these non-linearities and adapt modulation and coding over frequency correspondingly. We evaluate the codeword error rate by link-level simulations based on 3GPP LTE specifications and estimate an upper bound for the achievable data rate.
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