Reciprocal Perfect and Asymptotically Perfect Periodic Radar Waveforms and Their Aperiodic Properties
Abstract
Digitally coded radar waveforms can be employed to obtain large time- bandwidth products (pulse compression ratios). A perfect periodic code is defined to be a periodic code whose autocorrelation function has zero sidelobes and whose amplitude is uniform (maximum power efficiency = 1). An asymptotically perfect periodic code has the property that as the number of elements in the code goes to infinity the code's autocorrelation function has zero sidelobes and its power efficiency is one. In this report, we introduce a new class of radar wave forms that are either perfect of asymptotically perfect codes. We call these reciprocal codes because they can be derived through a linear transformation of the known codes. We also examine the reciprocal code's aperiodic performance. This is motivated by the tendency of good periodic codes to yield good aperiodic codes, and hence high pulse compression ratios with low sidelobe responses are attainable.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 24, 1989
- Accession Number
- ADA208938
Entities
People
- Frank F. Kretschmer Jr.
- Karl R. Gerlach
Organizations
- United States Naval Research Laboratory