Satellite receiver doppler compensation using resampled satellite signals
AssigneeHughes Network Systems, LLC
InventorsSantharam Gurumani, Seokho Kim
Life of this patent
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Abstract
A telecommunications system includes a satellite receiver programmed to estimate a Doppler frequency associated with a satellite signal. Estimating the Doppler frequency includes sampling the satellite signal, resampling the sampled satellite signal, and compensating for a frequency offset associated with the satellite signal. An example satellite receiver includes a sampling device programmed to sample the satellite signal, a resampling device programmed to sample the sampled satellite signal and output a resampled satellite signal, and an incremental phase modulator programmed to filter a frequency offset from the resampled satellite signal.
Claims20
A telecommunications system comprising:
- a satellite receiver programmed to estimate a Doppler frequency associated with a satellite signal, wherein estimating the Doppler frequency includes sampling the satellite signal, sampling the sampled satellite signal, and compensating for a frequency offset associated with the satellite signal,
- wherein the satellite receiver includes a controller and an incremental phase modulator programmed to filter the resampled satellite signal to compensate for the frequency offset and output a filtered satellite signal,
- wherein the satellite receiver includes a first buffer and a second buffer, and wherein the incremental phase modulator is programmed to store the filtered satellite signal in at least one of the first buffer and the second buffer,
- wherein the incremental phase modulator is programmed to determine that the controller is accessing the first buffer and select the second buffer for storing the filtered satellite signal as a result of determining that the controller is accessing the first buffer.
A satellite receiver comprising:
- a sampling device programmed to sample the satellite signal;
- a resampling device programmed to sample the sampled satellite signal and output a resampled satellite signal;
- a first buffer;
- a second buffer;
- a controller programmed to access the first buffer and the second buffer at different times;
- and
- an incremental phase modulator programmed to filter a frequency offset from the resampled satellite signal and output a filtered satellite signal and store the filtered satellite signal in at least one of the first buffer and the second buffer,
- wherein the incremental phase modulator is further programmed to determine that the controller is accessing the first buffer and select the second buffer for storing the filtered satellite signal as a result of determining that the controller is accessing the first buffer.
Dependencies are inferred from the claim text.