Covert underwater acoustic
WebCovert communications are conducted at a low received signal-to-noise ratio (SNR) to prevent interception or detection by an eavesdropper, and successful detection in this particular area heavily relies on the processing gain achieved by employing the direct-sequence spread-spectrum (DSSS) technique. If covert communications take place in … WebMar 13, 2013 · Covert underwater acoustic communication is a particularly challenging task in the underwater acoustic environment. …
Covert underwater acoustic
Did you know?
WebNov 5, 2024 · Covert underwater acoustic communication is the concept of stealth communication in an underwater acoustic environment. There are two main methods … WebMar 2, 2024 · This paper researches the recognition of modulation signals in underwater acoustic communication, which is the fundamental prerequisite for achieving noncooperative underwater communication. In order to improve the accuracy of signal modulation mode recognition and the recognition effects of traditional signal classifiers, …
WebApr 14, 2024 · High-capacity, long-distance underwater wireless optical communication (UWOC) technology is an important component in building fast, flexible underwater sensing networks. Underwater communication with light as a carrier has a large communication capacity, but channel loss induced by light attenuation and scattering largely limits the … WebJul 28, 2024 · Recently, bionic signals have been used to achieve covert underwater acoustic communication (UWAC) with high signal-to-noise ratios (SNRs) over transmission systems. A high SNR allows the attackers to proceed with their mischievous goals and makes transmission systems vulnerable against malicious attacks. In this paper we …
WebJul 17, 2024 · To achieve covert underwater acoustic communication (UAC) at energies with a low probability of detection (LPD), a system should work at a low signal-to-noise ratio (SNR) with no repeating patterns in the transmitted signal. Not all covert UAC schemes can satisfy both requirements. The present paper studies a truly covert UAC scheme. The … WebApr 30, 2024 · The lack of a communication infrastructure is one of the main reasons for restricting human activity in the ocean. In general, acoustic waves are used for underwater wireless communications and networks. Underwater acoustic communications and networks should overcome (1) the limited data rate due to the narrow bandwidth and the …
WebJul 17, 2024 · To achieve covert underwater acoustic communication (UAC) at energies with a low probability of detection (LPD), a system should work at a low signal-to-noise …
WebNov 5, 2024 · 4 Conclusions. Based on the principle of bionics, from the perspective of bionic camouflage, this paper proposes to use the inherent biological call as the symbol … thermometer\u0027s 96WebIn November 2012, an experiment demonstrating biological mimicry method for covert underwater acoustic communication (UAC) was conducted at Lianhua Lake in … thermometer\\u0027s 98WebMay 1, 2024 · Linear chirp spread spectrum technique is widely used in underwater acoustic communication because of their resilience to high multipath and Doppler shift. Linear frequency modulated signal requires a high spreading factor to nearly reach orthogonality between two pairs of signals. On the other hand, nonlinear chirp spread … thermometer\u0027s 95WebAbstract: Covert underwater acoustic communication technology is playing an increasingly important role in the hidden transmission of underwater information. Different from the … thermometer\\u0027s 97WebAug 16, 2024 · How the email spam could become an effective means of covert communication by criminals is described in Yu. 18 A covert underwater acoustic communication using a mimicking genuine sea piling ... thermometer\\u0027s 9aWebJan 30, 2024 · About. I have finished my Master's Degree in Underwater Acoustics Engineering at Harbin Engineering University in Harbin, … thermometer\u0027s 97WebApr 5, 2024 · WOSS is a multi-threaded C++ framework that permits the integration of any existing underwater channel simulator that expects environmental data as input and provides as output a channel realization. Currently, WOSS integrates the Bellhop ray-tracing program. Thanks to its automation the user only has to specify the location in the world … thermometer\\u0027s 94