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Multimode waveguide speckle patterns for compressive sensing.

George C Valley, George A Sefler, T Justin Shaw

|June 1, 2016

Summary

This summary is machine-generated.

Passive speckle patterns in multimode waveguides can create effective measurement matrices for compressive sensing (CS). This microwave photonic approach offers a path toward integrated circuits for sparse gigahertz-band RF signal measurement.

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Area of Science:

Photonics
Signal Processing
Microwave Engineering

Background:

Compressive sensing (CS) offers advantages over traditional methods for RF signal sampling.
Developing efficient measurement matrices (MMs) is crucial for CS system performance.
Microwave photonics presents a promising avenue for compact and power-efficient CS systems.

Purpose of the Study:

To investigate passive speckle patterns in multimode waveguides as potential MMs for CS.
To evaluate the performance of these speckle MMs for gigahertz-band RF signals.
To explore the feasibility of integrated photonic circuits for CS applications.

Main Methods:

Measurement and calculation of MMs from multimode fibers and planar waveguides.
CS system simulations utilizing the measured and calculated speckle MMs.
Analysis of speckle MM properties, including phase transition and coherence, compared to sub-Gaussian MMs.

Main Results:

Speckle patterns in multimode waveguides exhibit properties suitable for CS MMs.
Speckle MMs demonstrate robust performance for sparse signals in time, frequency, and wavelet domains.
Multimode planar waveguides can be engineered to produce speckle MMs comparable to those from multimode fibers.

Conclusions:

Passive speckle patterns in multimode waveguides are viable MMs for compressive sensing.
This research paves the way for integrated microwave photonic CS systems for RF signal measurement.
The proposed method offers a potential solution for high-performance, compact RF signal acquisition.