Acoustic signature of an unmanned air vehicle exploitation for aircraft localisation and parameter estimation

Defence Science Journal

S. Sadasivan¹  S. Ravi Sekar¹  M. Gurubasavaraj¹ 

[1] Aeronautical Development Establishment, Bangalore

关键词: Signal processing;    Acoustic signature;    Acoustic spectrogram;    Target recognition;    Unmanned air vehicle;   

DOI  :  

学科分类：社会科学、人文和艺术（综合）

来源: Defence Scientific Information & Documentation Centre

【 摘 要 】

"Higher harmonics in the acousticspectrogram of an unmanned air vehicle in-flight; as obtained from aground-based microphone measurement, is shown to be useful forestimating the vehicle's altitude, speed andtrue engine revolutionsper minute. Specifically, the Doppler-shifted frequency time historiesderived from spectrogram contours are used in this estimation approachwhich is based on a least mean square error fitto an Instantaneousfrequency model proposed In the literature. Benefits of employing higherharmonics -rather than the fundamental only -in the computations arebrought out. The results obtained are satisfactory. A possible systemconfiguration for automatic detection and localisation of similaraircraft is briefly discussed here.

【 授权许可】

Unknown