Abstract: A navigation signal generator on a framework that provides a standardized object-oriented means for developing and managing signal processing functions. The framework provides the ability to dynamically reallocate functions allowing numerous communications, signals intelligence, and information warfare missions that may be required under a single platform and co-exist with other frameworks. In one embodiment the system is a software defined navigation augmentation using the software defined radio architecture.

Abstract: Techniques are disclosed for optical switching and data control, without the interaction of electronic switching speeds. In one example embodiment, a common cavity optical latch is provided that that can hold an optical state for an extended period of time, and the operation of which is controlled optically. Optical phase control allows optical modal switching to be employed between two common optical cavities, using incident optical signals and the way in which the cavities manipulate the phase within them to lock in one or the other configuration, thereby forming an optical latch. The optical latch is implemented in an integrated fashion, such as in a CMOS environment.

Abstract: Methods, systems and other embodiments associated with a laser communication system using a single wavelength are presented. A first data is modulated onto an RF carrier to produce a modulated RF carrier. A laser is intensity modulated using with the modulated RF carrier. The intensity modulated laser beam is transmitted from an interrogator to a modulating retro-reflector (MRR) terminal. A portion of the laser beam is received at a receiver at the MRR terminal. Another portion of the laser is modulated at the MRR terminal with a second data to produce a re-modulated laser beam. The re-modulated laser beam is reflected back to the interrogator.

Abstract: Techniques are disclosed for optimizing power consumption in electronic devices that operate on battery-based or scavenged power. The power scavenged or otherwise supplied by such devices may therefore last longer, allowing longer performance on a given charge (whether sourced from scavenged power, battery power, or a combination thereof). An energy distribution circuit can be used in conjunction with a hysteretic switch, wherein the hysteretic switch can be used to switch an energy storage element in-circuit (so that it can provide charge to sub-circuitry or components) when the charge stored on that element exceeds a given charge threshold; otherwise, the hysteretic switch presents as a high resistance or open circuit when the charge stored on the energy storage element drops below a lower recharge threshold. The energy distribution circuit can be configured for adaptively providing different discharge rates for different loads.

Abstract: A compressive sensor array (CSA) system and method uses compressive sampling techniques to acquire sensor data from an array of sensors without independently sampling each of the sensor signals. In general, the CSA system and method uses the compressive sampling techniques to combine the analog sensor signals from the array of sensors into a composite sensor signal and to sample the composite sensor signal at a sub-Nyquist sampling rate. At least one embodiment of the CSA system and method allows a single analog-to-digital converter (ADC) and single RF demodulation chain to be used for an arbitrary number of sensors, thereby providing scalability and eliminating redundant data acquisition hardware. By reducing the number of samples, the CSA system and method also facilitates the processing, storage and transmission of the sensor data.

Abstract: Multiple RFID integrated circuit microradio chips are located at the feed point of an RFID tag antenna for greater, reliability, elimination of testing and to take advantage of coherent microradio operation for increased gain and power, better signal-to-noise ratios, improved range and low bit error rates.

Abstract: Rather than costly modifications to existing radars, a small, low cost radar warning receiver is used to monitor the RF environment. This add-on receiver can provide situational awareness including RF signal levels and angle of arrival, and recommend or provide antenna scanning synchronization, blanking inputs or gated reactionary outputs to or for the airborne radar. Utilization of this information can be used to reduce false alarms and improve system performance.

Abstract: A broadband transmission line impedance transformer performs impedance transformation with improved frequency response and efficiency across a wide operational bandwidth. In particular, the bandwidth of a transmission line 2:1 impedance transformer may be significantly increased by adding an additional compensating capacitor as an internal component between interconnected transmission lines. This capacitor effectively improves low frequency response for a given length of transmission lines and decreases mismatch in an entire frequency range. The overall bandwidth ratio increases at least twice and mismatch decreases.

Abstract: Ground clutter is effectively separated from true signals echoed by a cable in the flight path of an aircraft, by encoding a transmitted pulse wave in a radar system with at least one transmit (TX) coding sequence, so that received signals echoed by the cable on which the pulse is incident and associated ground clutter are orthogonal or separable from one another. The TX coding sequence is altered into two receive (RX) coding sequences one of which corresponds to the cable and the other to the ground clutter. The two RX coding sequences are then correlated with the received signals, thereby separating the true signals echoed by the cable from the associated ground clutter.

Abstract: A system is provided for semi-active laser designation, the system comprising: a guidance and control system having a plurality of wings disposed at an aerodynamically advantageous angle; a plurality of linear sensor arrays configured to measure location of a target, each the sensor array being disposed on a wing of the plurality of wings; and each the linear sensor array providing independent data to the guidance and control system as to the location of the target.

Abstract: A method and system for guiding and controlling an ordinance body having a trajectory and a bore sight angle including making corrections to the trajectory based on bore sight angle vs. time history. The system is incorporated with existing fuse components in a replacement kit for existing munitions. The method determines nominal time values of the ballistic trajectory of the munition in relation to launch time and determines deviation from the nominal time values by an algorithm by analyzing signals received from a source of radiation located at the target. A processor determines lateral (left/right) and range errors and provides commands to a plurality of flight control surfaces mounted on the munition.

Abstract: A compressive sensor array (CSA) system and method uses compressive sampling techniques to acquire sensor data from an array of sensors without independently sampling each of the sensor signals. In general, the CSA system and method uses the compressive sampling techniques to combine the analog sensor signals from the array of sensors into a composite sensor signal and to sample the composite sensor signal at a sub-Nyquist sampling rate. At least one embodiment of the CSA system and method allows a single analog-to-digital converter (ADC) and single RF demodulation chain to be used for an arbitrary number of sensors, thereby providing scalability and eliminating redundant data acquisition hardware. By reducing the number of samples, the CSA system and method also facilitates the processing, storage and transmission of the sensor data.

Abstract: Techniques are disclosed for determining the bearing from a three-axis geophone to a seismic source, such as a person or other man-made seismic source. In one embodiment, the techniques are implemented as a method that includes receiving outputs from a three-axis geophone (x axis, y axis and z axis outputs), computing a magnitude signal based on the x and y axis outputs, determining locations of each local peak in the magnitude signal, computing a bearing estimate for each peak, and computing a median of the bearing estimates. The resulting median bearing is an estimate of the bearing from the geophone to a target seismic source. In one such case, computing the magnitude signal based on the x and y axis outputs is performed in response to detecting the target seismic source in the phase-shifted z axis output.

Abstract: A Mersenne-Cassegrain telescope provided in a single block of glass in which opposed parabolic elements are precision milled through diamond turning of a glass boule, with the magnification power of the telescope determined by the differences in focal length between the two parabolas. The result is a volumetrically small telescope with pre-aligned surfaces that are maintained by the structural rigidity of the glass itself and in which thermal coefficients of expansion, vibration and the like have no effect due to the single glass element structure.

Abstract: A shortened multi-band antenna includes in-line dipoles, selected elements of which having shielded meanderline chokes to be able to switch from an extended dipole at the lower VHF frequencies to a shortened dipole for the UHF band. Additionally, the staggered asymmetric meanderline configuration permits overall size reduction, whereas antenna construction includes an intermediate fiberglass layer over which conductive foil is placed for tuning and for parasitic radiator purposes to improve the gain of the UHF dipole in the upper regions of the band at 450 megahertz. Additionally, at the low end of the 30 megahertz band a sleeve is positioned between the base of the lowest dipole element and ground, with the sleeve provided with two parallel RLC circuits tuned to different bands to improve VSWR at the low end of the VHF band and to eliminate unwanted nulls.

Abstract: A system for testing a circuit. The system comprises a first circuit mounted on an embedded first circuit board and a test circuit mounted on the embedded first circuit board. The system further comprises a second circuit board on the first circuit board, the second circuit board including a second circuit and a test device external to the first and second circuit board. The test circuit is effective to send at least one first test signal from the test circuit to the first circuit, receive a first response of the at least one first test signal from the first circuit, and forward the first response to the test device.

Abstract: A wireless network connection system remotely connects to a network without the use of crystal reference oscillators. This provides communication at long range using a low transmit Effective Isotropic Radiated Power (EIRP). Operation is obtained through a combination of injection locking the system clock to the fundamental frequency of a remote reference oscillator, injection locking the transmitter to the third harmonic of the remote reference oscillator, a micro-watt RF receiver, and a network connection.

Abstract: A method for carrying out electromagnetic cloaking using metamaterial devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides. This approach leads to low-loss, broadband performance in the visible frequency range, which is difficult to achieve by other means. We apply this technique to electromagnetic cloaking. A broadband, two-dimensional, electromagnetic cloaking is demonstrated in the visible frequency range on a scale ˜100 times the wavelength. Surprisingly, the classic geometry of Newton rings is suited for an experimental demonstration of this effect.

Abstract: In the method for operating a plurality antenna having near-field (NF) zone mounted on a vehicle, wherein the improvement comprises the step of cloaking in the near-field (NF) zone of each of said plurality of antennas.

Abstract: A compact instrument enables placement of the instrument such that the image of the laser beam, as retro reflected and diffracted, forms outside the tracking field of view. The target source and beam camera can be located at the focus of a Cassegrain objective. Embodiments include shared objective and twin objective design. With a shared objective design, both the beam projector and profiling camera can see the same focal length. A two objective design can use two different focal lengths.