Fundamental Limits to Synchronization and Tracking.
Final rept. 30 Dec 82-30 Jun 84,
MAGNAVOX ADVANCED PRODUCTS AND SYSTEMS CO TORRANCE CA
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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 timefrequency 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 bN 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.
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