Defense & Security

 

23 Results were found on Technologies

Leading Researchers:

INFERRING THE PERIODICITY OF DISCRETE SIGNALS

A method for testing a signal comprises obtaining a signal, determining whether the signal has at least one period, measuring that period and providing the measurement as output. A power spectral density estimation can be used for signals having a... Read More >

Leading Researchers:

Athermalization of infra-red lenses via optical phase mask with no performance degradation at nominal conditions

TechnologyInfra-red (IR) imaging (in the LWIR and MWIR bands) is widely used for observation and surveillance applications. Most of IR optical materials are very sensitive to temperature changes. This sensitivity is reflected in a temperature... Read More >

Leading Researchers:

Improvements in BOTDA for fiber optic sensors

TechnologyThis method is based on the Brillouin effect in optical fibers. By using a simple single mode optical fiber, strain is measured in a distributed manner along the entire fiber length, simultaneously, in high repetition rate. By... Read More >

Leading Researchers:

Briloullin simultaneous interrogation

Methods and systems used to perform sweep-free stimulated Brillouin scattering-based fiber optical sensing are described. In one aspect, a method includes interrogating different parts of a Brillouin gain spectrum using multiple optical tones... Read More >

Leading Researchers:

Compressed lightfield imaging

A novel plenoptic imaging system for compressed acquisition of light field. The camera will consist of a standard high-resultion imaging sensor with a specially designed optical modulator, and will offer significantly higher combined spatial... Read More >

Cancellation of Non-linear Interference in Optical Fiber Communication

ObjectivesThe theoretical research has led to the understanding that the effects of the nonlinear interference (NLIN) between the various channels in wavelength division multiplexed (WDM) environment can be described as time-varying inter-symbol... Read More >

Multi Focus Imaging using Optical Phase Mask

Abstract A method for extended depth of field imaging based on image acquisition through a thin binary phase plate followed by fast automatic computational post-processing is presented. By placing a wavelength dependent optical mask inside the... Read More >

Leading Researchers:

A low-complexity low-latency interactive communication system with spectral efficiency approaching the Shannon limit

BackgroundDigital communication systems use forward error correction (FEC) in order to be spectrally efficient and approach the Shannon limit. The drawbacks of using FEC are high latency and high computational complexity. On the other extreme,... Read More >

Leading Researchers:

Direction finding of Wi-Fi transmitters

TechnologyWe developed an apparatus for Direction Finding of Wi-Fi transmitters, i.e., estimating the Angle-of-Arrival (AoA) of a received Wi-Fi signal, while using standard off-the-shelf hardware and requiring no infrastructure deployment, no... Read More >

Leading Researchers:

Free online web wizard application to assess the amount of nonlinear interference noise generated in fiber-optic communications systems

Nonlinear interference noise (NLIN) is arguably the most important factor limiting the capacity of fiber-optic communication systems. It is customary to classify nonlinear phenomena as either intra-channel, or inter-channel. Intra-channel effects... Read More >