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AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsGerald R. Mackelburg, Stanley J. Watson, Jayson T. Durham, Alan Gordon
Estimating the term…
A precision Doppler effect compensator provides Doppler compensation in astic transmission by simultaneously sending a known reference signal with an information signal. The information signal and reference signal undergo identical Doppler effects. The compensator uses the Doppler shifted reference signal to sample the analog Doppler affected information signal. The analog information signals are digitally converted and stored in a first in first out shift register. The samples are read out of the FIFO at a rate corresponding to the frequency of a non-Doppler shifted reference signal so as to precisely reconstruct the information signal as transmitted. The samples read from the FIFO are reconverted from digital to analog form to be presented to a receiving modem for further information processing.
A system for transmitting information from a remote station to a local station wherein a signal transmitted is subject to Doppler effect comprising:
An improved communications system in which an information signal and a reference signal are simultaneously transmitted from a transmitter in which said information signal and said reference signal are subject to the same Doppler effect during transmission, the information signal and the reference signal being received at a receiver with a received information signal comprising the information signal as received by the receiver and as may be Doppler effected and a received reference signal comprising the reference signal as received by the receiver and as may be Doppler effected, the improvement comprising:
A method for correcting Doppler effect affecting a transmission of information from a transmitter to a receiver comprising the steps of:
Dependencies are inferred from the claim text.