Methods and systems for doppler frequency shift removal and correlation for software-based receivers
AssigneeUTI Limited Partnership
InventorsMark Gregory Petovello, Gérard Lachapelle
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Abstract
Embodiments of the invention provide a method for effecting Doppler removal and correlation for software-based receivers. For one embodiment of the invention Doppler removal is performed concurrently for all received communications signals. For one embodiment of the invention, a single frequency selected to effect Doppler removal, multiple communications signals having Doppler frequency shift are received from corresponding communications signal sources, and a Doppler removal process is performed concurrently for each received communication signal. A correlation process is then performed, the correlation process having an integration interval divided into multiple sub-intervals.
Claims21
A method comprising:
- selecting a single frequency to effect Doppler removal;
- receiving multiple communications signals having Doppler frequency shift from corresponding communications signal sources;
- performing a Doppler removal process using the selected single frequency, the Doppler removal process performed concurrently for each received communication signal;
- and performing a correlation process, the correlation process having an integration interval divided into multiple sub-intervals.
An apparatus comprising:
- an antenna for receiving multiple communications signals having Doppler frequency shift from corresponding communications signal sources;
- and signal processing means for performing a Doppler removal process concurrently for each received communication signal, the Doppler removal process effected using a single selected frequency and performing a correlation process, the correlation process having an integration interval divided into multiple sub-intervals.
A machine-readable medium that provides executable instructions, which when executed by a processor, cause the processor to perform a method, the method comprising:
- selecting a single frequency to effect Doppler removal;
- receiving multiple communications signals having Doppler frequency shift from corresponding communications signal sources;
- performing a Doppler removal process using the selected single frequency, the Doppler removal process performed concurrently for each received communication signal;
- and performing a correlation process, the correlation process having an integration interval divided into multiple sub-intervals.
Dependencies are inferred from the claim text.