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Microwave pulse phase encoding using a photonic microwave delay-line filter.

Yitang Dai¹, Jianping Yao

¹Microwave Photonics Research Laboratory, School of Information Technology and Engineering, University of Ottawa,Ottawa, Ontario, K1N 6N5, Canada.

|December 19, 2007

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A new photonic microwave filter enables precise microwave pulse phase encoding. This technique uses nonidentical time delays to generate custom phase-coded pulses, demonstrated with binary and quaternary patterns.

Area of Science:

Photonics
Microwave Engineering
Signal Processing

Background:

Microwave pulse phase encoding is crucial for advanced communication systems.
Traditional delay-line filters have limitations in generating complex phase codes due to identical time delays.

Purpose of the Study:

To propose and demonstrate a novel technique for microwave pulse phase encoding.
To utilize an incoherent photonic microwave delay-line filter with nonidentical time-delay differences.

Main Methods:

Designed a photonic microwave delay-line filter with nonidentical time-delay differences between adjacent taps.
Adjusted time-delay differences to generate specific phase code patterns.
Experimentally generated binary and quaternary phase-coded microwave pulses.

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Main Results:

Successfully generated phase-encoded microwave pulses with desired code patterns.
Demonstrated the ability to control the number of chips and phase shifts per chip.
Experimental verification of binary and quaternary phase code generation.

Conclusions:

The proposed photonic microwave filter technique effectively enables flexible microwave pulse phase encoding.
This method offers precise control over phase code generation for advanced applications.
The experimental results validate the feasibility and effectiveness of the novel technique.