Abstract: A digital filter-decimator-tuner is configured to receive a complex signal input xk and output a complex USB signal yuk and a complex LSB signal ylk. It includes a USB processing path coupled to receive xk and output yuk, the USB processing path including a USB FIR filter configured to receive a portion of the xk signal and output a first USB intermediate filtered signal, a decimator configured to decimate the first USB intermediate filtered signal and output a second USB intermediate signal, a USB tuner configured to receive the second USB intermediate signal and a USB tuning signal and output a third USB intermediate signal, and a USB equalization filter configured to receive the third USB intermediate signal, and output yuk; and a parallel LSB processing path coupled to receive xk and output ylk. The USB and LSB processing paths may be implemented by the same hardware in one embodiment.

Abstract: A magnetic signal noise reduction and detection system has inputs configured to receive data from a first total field scalar magnetometer, data from a vector magnetometer, and data from a position, velocity and heading sensor, a signal processor configured with a pre-processor system, an adaptive noise cancellation system and a detection system, the pre-processor system configured to carry out initial processing of data received. The pre-processor is configured to convert data to the frequency domain and pass the converted data to the adaptive noise cancellation system. The adaptive noise cancellation system is configured to carry out multivariate regression on the converted data to reduce detected noise. The detection system is configured to detect magnetic anomalies and output information in real time about the magnetic anomalies to a user interface.

Abstract: An opportunistic modem (OM) system receives user data at an input port and transmits a modem output signal at an output port. In one aspect the data is initially transmitted over a first carrier in the modem output signal having a first frequency and bandwidth. Subsequently a second carrier having a second frequency and bandwidth is established, initially used to transmit pilot data, and then the user data is divided between the first and second carriers in the modem output signal. In another aspect the data is initially transmitted over a first and a second carrier in the modem output signal having respective first and second frequencies and bandwidths. Subsequently the second carrier is used to transmit pilot data for a period time. After the period of time the second carrier is de-established. In another aspect establishment and de-establishment of carriers is performed in response to detected interference.

Abstract: A method and apparatus for configuring a portable first cellular base station to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information including at least the location area code for the at least one second operating cellular base station and a neighbor list of neighboring cellular base station scrambling codes; and configuring the first cellular base station to have the same scrambling code as one of

Abstract: A system for correcting for an angle of rotation between a linearly polarized target signal and a dual-polarized antenna having vertical and horizontal outputs includes receiving a time series of signals from the vertical and horizontal outputs of the receive antenna, applying the vertical signals simultaneously to a data buffer and to a spectrum domain converter block to yield, respectively, spectral Xv(n) and Xv(k) signals, applying the horizontal signals simultaneously to a data buffer and to a spectrum domain converter block to yield, respectively, spectral Xh(n) and Xh(k) signals, detecting the angle of rotation, applying the angle of rotation and the Xv(k) and Xh(k) signals to a polarization rotation correction block to obtain polarization corrected frequency data, and applying the detected angle of rotation and the Xv(n) and Xh(n) signals to a polarization rotation correction block to obtain polarization corrected time data.

Abstract: A method and apparatus for configuring a first cellular base station such as a femtocell to operate in a digital cellular telecommunications network includes: placing the first cellular base station in the digital cellular telecommunications network; detecting with a radio receiver at least one second operating cellular base station within the digital cellular telecommunications network; demodulating a first transmission of the at least one second cellular base station transmitter to obtain a first data stream; predictively modifying the first data stream to create a modified first data stream; correlating at least one periodic portion of the modified first data stream to form an enhanced data signal; decoding the enhanced data signal to obtain information; and configuring the first cellular base station with the information.

Abstract: A method and apparatus provide digital frequency channelization of a digitally sampled input stream having a first bandwidth.

Abstract: A method and apparatus for fractional digital integration of an input signal is provided, the input signal including a time series of numerical values and the method or apparatus including applying the input signal time series to one input of a two-input summer at a time I, providing an output of the summer to a delay register at time I, providing an output of the delay register from time i?1 to a two-input multiplier, providing an output of the multiplier to the summer at time I, using a resettable counter to determine a value i and index a lookup table with i to provide the indexed value of the lookup table as an input to the multiplier, and obtaining an output signal time series from the output of the summer.

Abstract: A system for correcting for an angle of rotation between a linearly polarized target signal and a dual-polarized antenna having vertical and horizontal outputs includes receiving a time series of signals from the vertical and horizontal outputs of the receive antenna, applying the vertical signals simultaneously to a data buffer and to a spectrum domain converter block to yield, respectively, spectral Xv(n) and Xv(k) signals, applying the horizontal signals simultaneously to a data buffer and to a spectrum domain converter block to yield, respectively, spectral Xh(n) and Xh(k) signals, detecting the angle of rotation, applying the angle of rotation and the Xv(k) and Xh(k) signals to a polarization rotation correction block to obtain polarization corrected frequency data, and applying the detected angle of rotation and the Xv(n) and Xh(n) signals to a polarization rotation correction block to obtain polarization corrected time data.

Abstract: A system and method for geolocating an RF emitter disposed on or near the ground includes receiving a signal from the RF emitter at each antenna of an array of N non-collinear antennas, wherein N is an integer greater than 2; routing the signal received at each of the antennas to one of a bank of N corresponding receivers; downconverting the N received signals to N downconverted signals; digitizing the N downconverted signals to digitized signals on N corresponding channels; using a processor to determine phase and amplitude variations across the N channels and to determine a Direction Vector corresponding to the signal received from the RF emitter; using a 2-dimensional pre-determined calibration table to look up a best match to the Direction Vector to determine a Bearing Vector to the RF emitter; transforming the Bearing Vector into locally level reference frame; and geolocating the RF emitter by determining an intersection between the locally level reference frame Bearing Vector and a dataset containing lo

Abstract: An inspection system and method for determining the elemental makeup of contents of an article includes a localizer for identifying at least one region of interest of the article from data representative of contents of the article, the at least one region of interest having a cross-sectional area or a volume that is less than the entire cross-sectional area or the entire volume of the article, an associated particle imaging device that produces an output that is indicative of the elemental makeup of contents of the article, a data selector for selecting a portion of the output of the associated particle imaging device that corresponds to respective identified regions of interest, and an analyzer for analyzing the portions of the output of the associated particle imaging device selected by the data selector to determine the elemental makeup of contents of the article in each identified region of interest.

Abstract: A magnetic signal noise reduction and detection system has inputs configured to receive data from a first total field scalar magnetometer, data from a vector magnetometer, and data from a position, velocity and heading sensor, a signal processor configured with a pre-processor system, an adaptive noise cancellation system and a detection system, the pre-processor system configured to carry out initial processing of data received. The pre-processor is configured to convert data to the frequency domain and pass the converted data to the adaptive noise cancellation system. The adaptive noise cancellation system is configured to carry out multivariate regression on the converted data to reduce detected noise. The detection system is configured to detect magnetic anomalies and output information in real time about the magnetic anomalies to a user interface.

Abstract: Classification of a potential target is accomplished by receiving image information, detecting a potential target within the image information and determining a plurality of features forming a feature set associated with the potential target. The location of the potential target is compared with a detection database to determine if it is close to an element in the detection database. If not, a single-pass classifier receives a potential target's feature set, classifies the potential target, and transmits the location, feature set and classification to the detection database. If it is close, a fused multi-pass feature determiner determines fused multi-pass features of the potential target and a multi-pass classifier receives the potential target's feature set and fused multi-pass features, classifies the potential target, and transmits its location, feature set, fused multi-pass features and classification to the detection database.

Abstract: A time sequence of raw radar data for a region of space is subdivided into a plurality of processing frames. The processing frames are subdivided into a plurality of processing cells and iteratively processed by selecting a single processing cell for processing, transforming the radar data of the processing cell to form transformed radar data in either the time domain or the Fourier domain. The transformed data is converted to a Power Spectrum Density Matrix in the case of the Fourier domain and a Time Space Correlation Matrix in the case of the time domain. This is smoothed and thresholded and then the clutter for the processing cell is estimated. Estimated local non-speckle clutter is estimated and removed from the transformed radar data, with the cleaned transformed radar data converted back to the time domain if required.