2014/04/27 by Mustafa A. Kishk, Ahmed M. Alaa, Kishk, Mustafa A. +1
Computer Science · Earth and Planetary Sciences · Engineering · Mathematics · #FOS: Computer and information sciences #Information Theory (cs.IT) #Underwater Acoustics Research #Underwater Vehicles and Communication Systems #Wireless Communication Security Techniques #Wireless Signal Modulation Classification #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1404.6737
arxiv created 2014/04/27 · openalex publication_date 2014/04/27 · arxiv updated 2014/04/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This paper provides an upper-bound for the capacity of the underwater acoustic (UWA) channel with dominant noise sources and generalized fading environments. Previous works have shown that UWA channel noise statistics are not necessary Gaussian, especially in a shallow water environment which is dominated by impulsive noise sources. In this case, noise is best represented by the Generalized Gaussian (GG) noise model with a shaping parameter β. On the other hand, fading in the UWA channel is generally represented using an α-μ distribution, which is a generalization of a wide range of well known fading distributions. We show that the Additive White Generalized Gaussian Noise (AWGGN) channel capacity is upper bounded by the AWGN capacity in addition to a constant gap of (1)/(2) log (\fracβ2 πe^1-\frac2β Γ(\frac3β)2(Γ(\frac1β))3 ) bits. The same gap also exists when characterizing the ergodic capacity of AWGGN channels with α-μ fading compared to the faded AWGN channel capacity. We justify our results by revisiting the sphere-packing problem, which represents a geometric interpertation of the channel capacity. Moreover, UWA channel secrecy rates are characterized and the dependency of UWA channel secrecy on the shaping parameters of the legitimate and eavesdropper channels is highlighted.