Shallow underwater acoustic channel model establishment and calculation method

Abstract

The invention discloses a shallow underwater acoustic channel model establishment and calculation method, mainly including the following steps: step 1, proposing a geometric model consistent with an actual situation; step 2, proposing a reference model for mathematical analysis, deriving a time-varying channel impulse response of a fading channel reference model, and further deriving a probabilitydensity function of an angle of departure and an angle of arrival as well as an expression of the UWA channel model propagation time and frequency delay; step 3, establishing an SOC random channel simulation model for experimental simulation based on the reference model, and proposing an equal-area scattering method to parameterize the channel simulation model; step 4, adopting a traditional Lp standard method to parameterize the simulation channel model, and comparing the performance of the two methods; and step 5, obtaining a theoretical result, and performing analysis. According to the shallow underwater acoustic channel model establishment and calculation method disclosed by the invention, an MESS parameterization method is adopted, the method is relatively simple in parameter calculation, a function closure analytic expression can be obtained, and compared with the traditional Lp method, the numerical precision is also accurate and efficient.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to the establishment of a shallow sea acoustic channel model and a calculation method thereof. Background technique [0002] In the last century, marine underwater random communication (underwater-acoustic, UWA) system was mainly used in the military field. The application of UWA has been researched in many fields, and the channel model is indispensable for designing UWA communication system. Researchers have conducted a large number of studies on simulating UWA channels, which are usually based on data obtained from measurements in some actual scenarios. Some researchers believe that the envelope of UWA is a Rice distribution, while others think that this kind of envelope obeys a Rayleigh distribution. In addition, recent literature has considered the lognormal channel envelope distribution, and analyzed the limitations of the data collected by the chan...

AI Technical Summary

Problems solved by technology

The existing UWA model has too much workload in terms of parameter calculation, and finally cannot obtain the closed analytical formula of the time-frequency correlation function, and it is difficult to compare the simulation model with the reference model numerically

Images