Abstract: A configurable acquisition engine for direct sequence (DS) spread spectrum (SS) is provided that is reconfigurable without increasing memory size for several use cases having different time-frequency uncertainties. The acquisition engine utilizes a frequency-domain decimation filter to reduce the number of output frequency points while still utilizing information from all frequency bins.

Abstract: A method and apparatus for providing a standalone anti-jamming (AJ) nuller-beamformer. Signals from an antenna array include a sum of Global Navigation Satellite System (GNSS) signals and jamming signals from a plurality of spatial sources. A front end is configured to amplify, filter, down-convert, and sample the input signals which are then filtered, downconverted, and decimated prior to frequency-domain and time-domain partitioning. Weights are computed and applied for spatial nulling of jamming signals in each frequency bin for the partitioned signals. Frequency and time-domain reconstruction generates a reconstructed signal with suppressed jamming.

Abstract: Systems, devices, methods, and computer-readable media for spread spectrum (SS) receiver interference mitigation are presented. An interference mitigation unit can include an interference analyzer that receives a complex-valued signal and estimates statistical characteristics of at least a portion of the complex-valued signal, a unit controller that receives the estimated statistical characteristics from the interference analyzer, classifies the interference distribution based on statistical characteristics as a Gaussian, long-tail, or short-tail, selects a non-linearity for that distribution, and a programmable non-linear module that performs a non-linear functional conversion of an envelope of the received complex-valued signal using a non-linear input-output characteristic based on the classification by the unit controller.

Abstract: A configurable acquisition engine for direct sequence (DS) spread spectrum (SS) is provided that is reconfigurable without increasing memory size for several use cases having different time-frequency uncertainties. The acquisition engine utilizes a frequency-domain decimation filter to reduce the number of output frequency points while still utilizing information from all frequency bins.

Abstract: Systems, devices, methods, and computer-readable media for spread spectrum (SS) receiver interference mitigation are presented. An interference mitigation unit can include an interference analyzer that receives a complex-valued. signal and estimates statistical characteristics of at least a portion of the complex-valued signal, a unit controller that receives the estimated statistical characteristics from the interference analyzer, classifies the interference distribution based on statistical characteristics as a Gaussian, long-tail, or short-tail, selects a non-linearity for that distribution, and a programmable non-linear module that performs a non-linear functional conversion of an envelope of the received complex-valued signal using a non-linear input-output characteristic based on the classification by the unit controller.