Abstract: A signal acquisition device includes a first stage processing module configured to correlate a first set of radio frequency (RF) signal samples to a plurality of generated tones, identify a candidate RF signal sample among the correlated first set of RF signal samples based on a peak magnitude of the correlated first set of RF signal samples, the candidate RF signal sample having a first correlation magnitude exceeding a first threshold value, and output an interpolated tone based on the candidate RF signal sample; and a second stage processing module configured to correlate a second set of RF signal samples corresponding to the interpolated tone to a plurality of code signals, and to output an output tone having a second correlation magnitude exceeding a second threshold value.

Abstract: A signal acquisition device includes a signal channelizer module and a signal processing module. The signal channelizer module is configured to channelize an incoming signal from a moving platform into a first plurality of channels across a first range of frequencies to produce a first channelized signal, to channelize the first channelized signal into a second plurality of channels across a second range of frequencies to produce a second channelized signal, and to store the second channelized signal into a memory. The signal processing module is configured to retrieve the second channelized signal from the memory and search the second channelized signal for a signal of interest.

Abstract: A signal acquisition device includes a signal channelizer module and a signal processing module. The signal channelizer module is configured to channelize an incoming signal from a moving platform into a first plurality of channels across a first range of frequencies to produce a first channelized signal, to channelize the first channelized signal into a second plurality of channels across a second range of frequencies to produce a second channelized signal, and to store the second channelized signal into a memory. The signal processing module is configured to retrieve the second channelized signal from the memory and search the second channelized signal for a signal of interest. The search may exclude channels tagged to be excised during the storing operation.

Abstract: A signal acquisition device includes a first stage processing module and a second stage processing module. The first stage processing module is configured to correlate a first set of a plurality of radio frequency (RF) signal samples to a plurality of generated tones, and to output a plurality of interpolated (candidate) tones each having first correlation magnitudes exceeding a first threshold value. The second stage processing module is configured to correlate a second set of the RF signal samples to a plurality of code signals, and to output a plurality of output tones each having second correlation magnitudes exceeding a second threshold value, where the second set of RF signal samples correspond to the interpolated tones.

Abstract: Techniques are provided for employing an embedded software defined radio (SDR) in a navigation system. A navigation system implementing the techniques according to an embodiment includes a global positioning system (GPS) receiver configured to acquire and track received GPS signals. The system also includes an SDR configured to process received communication signals. The communication signals include timing data. The SDR is further configured to calculate position and navigation data based on a combination of the processed communication signals and the tracked GPS signals provided by the GPS receiver. The system further includes a system timer configured to provide a common time base for use by the GPS receiver and the SDR. The navigation system is implemented in an application specific integrated circuit (ASIC).

Abstract: Techniques are provided for employing an embedded software defined radio (SDR) in a navigation system. A navigation system implementing the techniques according to an embodiment includes a global positioning system (GPS) receiver configured to acquire and track received GPS signals. The system also includes an SDR configured to process received communication signals. The communication signals include timing data. The SDR is further configured to calculate position and navigation data based on a combination of the processed communication signals and the tracked GPS signals provided by the GPS receiver. The system further includes a system timer configured to provide a common time base for use by the GPS receiver and the SDR. The navigation system is implemented in an application specific integrated circuit (ASIC).