Abstract: An optical switching and delay system for optical encryption and/or optical decryption may comprise a switch bank, a set of optical delay lines, a combiner, and a processor. The switch bank may be configured to receive an optical signal in a first arrangement and route the optical signal to the set of optical delay lines according to a switching arrangement key. The set of optical delay lines may be configured to provide delays to the optical signal. The combiner may be configured to receive the optical signal with delays from the set of optical delay lines and combine the optical signal into a second arrangement. The processor may be configured to receive the switching arrangement key and control the switch bank according to the switching arrangement key. The switching arrangement key may comprise a set of instructions for routing the optical signal.

Abstract: A man-portable phased array ISR system includes a multilayer panel. A first panel layer includes a subarray layer having a plurality of sensors for detecting and receiving radiofrequency information. A second panel layer includes a digital data storage system to digitize, record and store the radiofrequency information. A third panel layer includes a command and communication link. A fourth panel layer includes a nanoparticle ultra-capacitor energy storage system adapted to provide power to the subarray, to the digital data storage system and to the command and communication link. The plurality of sensors may be receive-only sensors for radio-frequency data collection. The first panel layer may include integral beamforming systems having a predetermined frequency range for transmit an receive radar signal formation and data collection.

Abstract: A multi-access laser communications terminal is disclosed. The communications terminal includes a deformable mirror whose surface contour is deformable by one or more actuators. The communications terminal further includes a closed-loop tracking system which controls the one or more actuators to change the surface contour of the deformable mirror in accordance with detected movement of an optical beam in order to keep the optical beam optimally locked on a receiver.

Abstract: An adaptive digital squelch system, responsive to ambient RF background noise, that automatically adjusts the receiver squelch level during intervals when no valid signal is being received. A valid signal is considered to be a signal that is greater than the receiver squelch level and which contains an audio signal at a specific frequency; otherwise, the signal is considered noise. When the invention detects the absence of a valid signal, the squelch level is periodically calculated by averaging multiple noise signal levels at multiple frequencies.

Abstract: A frequency hopping spread spectrum receiver that does not require an independent synchronization source to receive and track a frequency hopping transmitter signal. In a search mode, the receiver of this invention hops in a reverse direction and at a faster rate than the transmitter hopping pattern. This results in faster signal acquisition time. The receiver uses the audio data tones of the transmit signal to detect and synchronize to the transmitter signal. Once in track mode of operation, a frequency hopping hysteresis ensures against erroneous detection of signal loss by tracking the transmitter hopping pattern for several consecutive hops before switching back to search mode.

Abstract: A beacon system wherein a beacon station is placed at a landmark such as a state line adjacent a major highway to broadcast information-containing alternating directional signals. In addition, each vehicle may be equipped with a radio receiver, a receiving decoder and a data analysis processor for receiving data signals from the beacon station. The beacon station includes an information encoder for generating first and second alternating but distinct location signals, first and second directional antennas disposed to radiate in opposite directions along the path of travel, the directional antennas having a significant back attenuation, a radio frequency transmitter for broadcasting the two location signals, preferably as data packets, to vehicle-mounted receivers along the path of travel, and an r.f. switcher for switching signal output of the transmitter between the two antennas in synchronization with the two location signals.