System for the acquisition of code signals
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United States of America Patent
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Jan 20, 1987
Grant Date -
N/A
app pub date -
Aug 19, 1970
filing date -
Aug 19, 1970
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for the secure and rapid acquisition of a transmitted acquisition composite code composed from acquisition component codes. The acquisition composite code may, for example, be composed in accordance with a Boolean majority voting rule. Reference component codes that correlate respectively with the acquisition component codes are combined to provide a verification composite code that correlates with the acquisition composite code only when all of the reference component codes in the verification code are each in alignment with the corresponding acquisition component codes in the acquisition composite code. The verification code may, for example, be composed in accordance with a modulo-2 addition rule. Initially, the reference component codes are individually brought into alignment with the transmitted signal during the acquisition thereof. The verification code is then cross-correlated against the acquired transmitted signal to verify the successful acquisition of the transmitted acquisition composite code.
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