A CARRIER INJECTION METHOD FOR RECOVERING THE WAVESHAPE OF CLIPPED SIGNALS.
Abstract
A method for recovering the original waveshape of a signal which has been clipped and sampled is examined. This process consists of adding a carrier, prior to clipping, to the signal to be reproduced. The desired signal is then reconstructed by a digital or continuous filter operating on the clipped data samples. This technique has application, for example, to active sonar systems which use clipping to implement beamforming and steering. Performance as measured by mean squared error and mean squared envelope error is evaluated as a function of sample frequency and carrier properties. Feasibility of the approach is demonstrated analytically and experimentally. Signal recovery can be accomplished for the most part without any substantial increase in sampling rate. From sonar systems which use many clipper in beamforming it is shown that as the number of channels (or hydrophones) with clippers increases, performance can approach that achieved without clipping. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 24, 1965
- Accession Number
- AD0480481
Entities
People
- Charles H. Knapp
Organizations
- General Dynamics Electric Boat