Signal Simulation Module Design Under The Background Of Towed Line Array Platform

Acoustic Warfare Technology has been a important research subject of the navy, and the simulation of the ship-radiated noise is an important technology of the Acoustic Warfare. Under the background of towed line array platform, simulating the ship-radiated noise real-timely is the important research emphasis of the subject. However, simulating the ship-radiated noise real-timely has to process massive data, which has high demands of the computer memory and the computing speed. Using the high performance computer and parallel computing can reduce the solution time of single problem, which is the inevitable trend of large scale compute. So the parallel compute research of simulating the ship-radiated noise real-timely has some research significance and value.Firstly, the paper discuss the classification of the parallel computer, the operating process and features of the IBM BladeCenterHS21 Blade Server, some problems needing attention about parallel programming and parallel debugging technology, analysis the features of ship-radiated noise. The paper constructed a cluster system successfully based on MPI and CentOS linux by researching the typical cluster system structure, completed parallel implementation about the simulation of the ship-radiated noise received by the towed line array sonar, including the generation of line spectrum based on table lookup, the generation of the continuous spectrum, and the noise with features of ship-radiated. From the analysis of the noise power spectrum, we know, line spectrum is the main component of the ship-radiated noise in the low frequency, and continuous spectrum become the main component of the ship-radiated noise with the frequency increased, and the continuous spectrum attenuate regularly.For more truly, the program has been achieved that the running track of the ship can change real-timely and any angle. For verifying the correctness of the ship-radiated noise generated on the IBM BladeCenterHS21 Blade Server, the paper analysis the data, including spectrum features, time delay relationship of the array elements, beam forming, correlation analysis, real-time analysis and continuous analysis. From all above analysis, we could found that parallel implementation of the ship-radiated noise simulation based on the towed line array platform meet the theory requirements, reach the expected target.