WebAug 2, 2024 · This paper thus proposes an underwater acoustic spread spectrum communication technology, which combines direct sequence spread spectrum and cyclic shift keying modulation to improve the data rate. Besides, a time-frequency two-dimensional search algorithm is used to realize the synchronization of this system. WebFeb 9, 2024 · A method based on beam tracking in an underwater acoustic (UWA) time-varying channel was proposed to improve the performance of UWA spread spectrum communication systems using arrays. In the ocean, the acoustic signal reaches the receiver through various paths, and the signal on each path has its own propagation delay and …
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WebFeb 9, 2024 · Abstract. A method based on beam tracking in an underwater acoustic (UWA) time-varying channel was proposed to improve the performance of UWA spread spectrum … WebJul 15, 2024 · When chaotic spread spectrum communication methods are used in underwater acoustic channels, the equalization techniques have to be used to deal with serious distortion caused by the underwater acoustic channel [24], as done for other air-based wireless communication [25], [26], [27]. giftworthy yarn coupon
Underwater spread-spectrum communications - IEEE Xplore
WebRelying on direct and converse piezoelectric effects,piezo-acoustic backscatter(PAB)technology reflects ambient acoustic signals to enable underwater backscatter communications at near-zero power,which was first realized through a prototype.In this paper,we propose a mathematical model of the PAB assisted underwater … WebAug 2, 2024 · Underwater acoustic channels are unstable and acoustic waves when propagating in the ocean are subjected to variety of interference, such as noise, … WebJul 15, 2024 · The underwater communication is susceptible to acoustic channel constraints, such as multipath propagation, high frequency selectivity, amplitude fading, phase instabilities, and ambient noise [1], [2]. To cope with such a challenging environment, spread-spectrum communication is often used due to its capability to overcome these … giftworld hurtownia