Fundamental Limits to Synchronization and Tracking.
Abstract
This is the Final Report for a study which was conducted over an 18 month period, and encompasses three tasks, as follows: Task 1 Acquisition Search: Establish fundamental limits to the rate of search for time/frequency acquisition, with particular application to high processing gain spread spectrum systems. The effects of phase noise and platform dynamics, such as doppler rate of change due to acceleration, are to be studied. The potential improvement offered by technologically advanced devices, e.g., matched filters, is to be examined. An objective is to show how matched filter processing gain may be trade for acquisition time; Task 2 Tracking for Coherent and Noncoherent Modulation: A comparison of coherent and noncoherent modulation techniques (BPSK versus MFSK, for example) is to be made with respect to tracking performance limits set by phase noise and platform dynamics. It is generally believed that noncoherent modulation is superior when phase noise effects are significant: However, this is offset by the inherent E sub b/N sub o advantage (approximately 3 dB) of coherent modulation schemes. The framework for the study is generic pseudonoise and frequency-hopping spread-spectrum antijam modulation and coding techniques. Originator-supplied keywords include: Viterbi algorithm; Error correction; Chernoff bound; and Demodulation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 30, 1984
- Accession Number
- ADA149623
Entities
People
- C. R. Cahn
- D. K. Leimer
- D. Prouty
- L. S. Lin