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US 7,126,982 B1Granted
Apparatus for rapid PN code acquistion
AssigneeL-3 Communications Corporation
InventorsSteven T. Barham, Samuel Kingston, Randal R. Sylvester, Ronald Leahy
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Abstract
An apparatus and method of determining a signal code. The method comprising steps of acquiring and correlating a signal with a first code sequence. In response to the correlation of the signal with a first code sequence a timing lock is achieved. Also in response to the signal correlation, an acknowledgement from a receiver of the signal to a transmitter of the signal is sent where upon the receiver and transmitter change to a second code sequence.
Claims4
A method of determining a coded signal, comprising:
- transmitting a first coded signal having a first code rate from a transmitter system;
- acquiring the first coded signal on a receiver system;
- as part of the acquisition, correlating the signal with a first code sequence having a first code rate and achieving a timing lock as said first code rate;
- calculating a probability of detection of the first coded signal;
- and
- changing the first coded signal to a second coded signal having a second code rate that is higher than said first rate, in response to the probability of detection (PD) of the first coded signal exceeding a predetermined amount.
3 more elements
Dependencies are inferred from the claim text.