Article
The Orthogonal Chirp Division Multiplexing Technique for Shallow-Water Acoustic Communications (en)
* Presenting author
Abstract:
A very shallow underwater acoustic communication channel is characterized by strong multipath propagation. Under such conditions, few signal modulation techniques enables the achievement of reliable data transmission. One of them is the Linear Frequency Modulation (LFM) technique. The data transmission rate of such signals can be increased by using multiple, mutually orthogonal LFM signals, i.e. the Orthogonal Chirp Division Multiplexing (OCDM).This paper presents the results of simulation experiments using chanel model based on measured time-varying impulse responses of shallow-water channel. The obtained results confirm that the use of the OCDM technique can increase the data transmission rate while maintaining the reliability that can be obtained when transmitting single LFM signals.