Active Sonar Systems Research Papers (original) (raw)
3 Followers
Recent papers in Active Sonar Systems
Coded waveform sonars have certain advantages such as robustness against acoustic countermeasure decoys and jammers. Another significant property of coded waveforms is their covertness ability under water. Coded waveform sonars also... more
Coded waveform sonars have certain advantages such as robustness against acoustic countermeasure decoys and jammers. Another significant property of coded waveforms is their covertness ability under water. Coded waveform sonars also provide an infrastructure which can evolve to a sonar sensor network. These advantages of coded waveform sonars increase their popularity in modern sonar systems. The purpose of this study is to analyze coded waveform active sonar performance of a submarine and submarine targets. Different operating frequencies, target ranges and different pulse types like classical continuous wave (CW) and frequency modulation (FM) are utilized during this study. A comparative analysis of coded waveforms is performed for the following types: Barker and Frank. Transmitter, receiver structures and channel modelling are included in the simulations. Deep water scenarios where a submarine is facing against both stationary and high speed targets are considered for this analysis. Multiple sonars operating in a dense environment are found to be useful for the utilization of coded waveform sonars as well as reducing the multipath effects of underwater medium. Finally, Monte Carlo simulation is used to evaluate Coded waveform performance against CW and FM pulses for probability of detection and false alarm rates under different circumstances mentioned above. Hardware requirements and cost effectiveness of coded waveform sonars are examined. Implementation and applicability challenges are also discussed in the conclusion. So, in addition to performance based evaluation, the simulation results are also considered to evaluate if this method is convenient under different circumstances despite the practical difficulties in its implementation.