DSP-Based Micro-Modem for Underwater Acoustic Communications
نویسندگان
چکیده
منابع مشابه
Dolphin Sounds-Inspired Covert Underwater Acoustic Communication and Micro-Modem
A novel portable underwater acoustic modem is proposed in this paper for covert communication between divers or underwater unmanned vehicles (UUVs) and divers at a short distance. For the first time, real dolphin calls are used in the modem to realize biologically inspired Covert Underwater Acoustic Communication (CUAC). A variety of dolphin whistles and clicks stored in an SD card inside the m...
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This paper presents a low-power microcontroller-based acoustic modem for low-range communication based on aspects of whale and dolphin communication. The approach is to decrease influences by using a frequency shift keying (FSK) modulation combined with frequency hopping spread spectrum (FHSS). Addressing individual recipients (unicast) as well as a group (multicast) or all recipients (broadcas...
متن کاملUnderwater Acoustic Communication and Modem-Based Navigation Aids
New forms of navigation aids for underwater vehicles are enabled through the use of acoustic communications. Both the content and form of the message may be used to estimate range, bearing, range rate, geo-location, and time. Accurate range estimates are available via a conventional 2-way method, but the transmitted signal also supports high precision bearing estimation and highly accurate rang...
متن کاملDesign and Implementation of an Omni-Directional Underwater Acoustic Micro-Modem Based on a Low-Power Micro-Controller Unit
For decades, underwater acoustic communication has been restricted to the point-to-point long distance applications such as deep sea probes and offshore oil fields. For this reason, previous acoustic modems were typically characterized by high data rates and long working ranges at the expense of large size and high power consumption. Recently, as the need for underwater wireless sensor networks...
متن کاملCovert underwater acoustic communications.
Low probability of detection (LPD) communications are conducted at a low received signal-to-noise ratio (SNR) to deter eavesdroppers to sense the presence of the transmitted signal. Successful detection at intended receiver heavily relies on the processing gain achieved by employing the direct-sequence spread-spectrum (DSSS) technique. For scenarios that lack a sufficiently low SNR to maintain ...
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ژورنال
عنوان ژورنال: The Journal of Korean Institute of Communications and Information Sciences
سال: 2014
ISSN: 1226-4717
DOI: 10.7840/kics.2014.39c.3.275