Detection of Wandering Signals with an ALI Processor. Part I. Over-Resolution Case.
Abstract
The detection performance of a specific suboptimum processor, termed the Automatic Line Integrator (ALI), is examined when the signal consists of a sine wave of unknown phase whose frequency wanders within some a-priori band which is searched by the ALI processor. The signal's phase and frequency are considered to be nearly constant for a duration T sub C (termed the 'coherence length') which is unknown to the processor. In this, Part I, study the detection performance is examined when the ALI processor employs filters which integrate for a time period which is longer than T sub C. General formulas are derived which permit performance calculations to be made as a function of signal and processor parameters. A specific example is presented illustrating the use of the formulas. For the example displayed the ALI processor incurs approximately 4 dB loss relative to the ideal detector which is presumed to have knowledge of the signal's frequency and coherence length. A sequel, Part II, considers the under-resolution regime in which the ALI filter-bank integrates for a time less than T sub C. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 10, 1975
- Accession Number
- ADA016617
Entities
People
- Gene B. Goldstein
Organizations
- Technology Service Corporation