Investigation of a Phase-Locked Loop Receiver for a Parametric Acoustic Receiving Array.
Abstract
This report describes the investigation of a phase-locked loop (PLL) demodulator considered for use with the parametric acoustic receiving array (PARRAY). The PARRAY as an acoustic sensor is explained and the effects of longitudinal transducer motion on the PARRAY are described. This transducer vibration produces intermodulation products between the desired acoustic signals and the vibration induced signals. Both theoretical analysis and experimental data showing that the PLL demodulator can reduce this intermodulation in a PARRAY are given. Comparison is made between theoretically predicted PLL intermodulation reduction and measurements taken with simulated PARRAY signals. Also, experimental data are described showing the operation of the demodulator with a PARRAY undergoing transducer vibration. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 05, 1980
- Accession Number
- ADA086871
Entities
People
- Robert A. Lamb
Organizations
- University of Texas at Austin