Abstract
Ultrasound waves pose a promising alternative to the commonly used electromagnetic waves for in-body communication. This due to the lower ultrasound wave attenuation, the reduced health risks and the reduced external interference. These properties might realize a more reliable, low-energy, secure and high throughput in-body communication link. Current state-of-the-art ultrasound designs, however, are limited in their practical in-body deployment and reliability. This stems from their use of bulky, focused transducers, the use of simple modulation schemes or the absence of a realistic test environment and corresponding realistic channel models. This talk focuses on enabling communication with small-scale (2mm size) and omni-directional transducers (1.2 MHz center frequency). First, we will address the specific channel characteristics of such communication links. Second, to cope with these channel characteristics, we propose an OFDM modulation scheme, optimized for ultrasound in-body communication scenarios. Third, we will discuss the performance of a device optimized to assess this communication link.
Published Version
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