Angle of Arrival Measurement System Using Double RF Modulation Technique

Research output: Contribution to journalArticleResearchpeer-review

Abstract

A new technique for determining the angle of arrival (AoA) of an RF signal is presented. It is based on a cascaded modulator structure where continuous wave light from an optical source is modulated by an incoming RF signal twice. The AoA of an RF signal can be determined by the system output RF signal power. The proposed structure is capable for measuring the AoA of both narrow and broad band RF signals. This overcomes the limitation in all previously reported photonics-based AoA measurement systems, which are applicable to either a single-frequency RF signal or a broadband RF signal. It also does not involve electrical components and high extinction ratio modulators, which are required in reported structures. Experimental results are presented that show an AoA measurement range of 0° to over 65° with errors of less than 1.9° for a microwave signal at 2.65 GHz and 12.62 GHz. Results also show the system is capable to measure the AoA of a pseudorandom binary sequence signal at a microwave frequency.

LanguageEnglish
Article number7200110
Number of pages10
JournalIEEE Photonics Journal
Volume11
Issue number1
Early online date3 Dec 2018
DOIs
StatePublished - Feb 2019

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Modulators
arrivals
Modulation
modulation
Binary sequences
Microwave frequencies
Photonics
Light sources
Microwaves
modulators
broadband
rangefinding
microwave frequencies
continuous radiation
narrowband
extinction
photonics
microwaves
output

Cite this

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title = "Angle of Arrival Measurement System Using Double RF Modulation Technique",
abstract = "A new technique for determining the angle of arrival (AoA) of an RF signal is presented. It is based on a cascaded modulator structure where continuous wave light from an optical source is modulated by an incoming RF signal twice. The AoA of an RF signal can be determined by the system output RF signal power. The proposed structure is capable for measuring the AoA of both narrow and broad band RF signals. This overcomes the limitation in all previously reported photonics-based AoA measurement systems, which are applicable to either a single-frequency RF signal or a broadband RF signal. It also does not involve electrical components and high extinction ratio modulators, which are required in reported structures. Experimental results are presented that show an AoA measurement range of 0° to over 65° with errors of less than 1.9° for a microwave signal at 2.65 GHz and 12.62 GHz. Results also show the system is capable to measure the AoA of a pseudorandom binary sequence signal at a microwave frequency.",
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Angle of Arrival Measurement System Using Double RF Modulation Technique. / Chen, Hao; Chan, Erwin Hoi Wing.

In: IEEE Photonics Journal, Vol. 11, No. 1, 7200110, 02.2019.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Chen,Hao

AU - Chan,Erwin Hoi Wing

PY - 2019/2

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N2 - A new technique for determining the angle of arrival (AoA) of an RF signal is presented. It is based on a cascaded modulator structure where continuous wave light from an optical source is modulated by an incoming RF signal twice. The AoA of an RF signal can be determined by the system output RF signal power. The proposed structure is capable for measuring the AoA of both narrow and broad band RF signals. This overcomes the limitation in all previously reported photonics-based AoA measurement systems, which are applicable to either a single-frequency RF signal or a broadband RF signal. It also does not involve electrical components and high extinction ratio modulators, which are required in reported structures. Experimental results are presented that show an AoA measurement range of 0° to over 65° with errors of less than 1.9° for a microwave signal at 2.65 GHz and 12.62 GHz. Results also show the system is capable to measure the AoA of a pseudorandom binary sequence signal at a microwave frequency.

AB - A new technique for determining the angle of arrival (AoA) of an RF signal is presented. It is based on a cascaded modulator structure where continuous wave light from an optical source is modulated by an incoming RF signal twice. The AoA of an RF signal can be determined by the system output RF signal power. The proposed structure is capable for measuring the AoA of both narrow and broad band RF signals. This overcomes the limitation in all previously reported photonics-based AoA measurement systems, which are applicable to either a single-frequency RF signal or a broadband RF signal. It also does not involve electrical components and high extinction ratio modulators, which are required in reported structures. Experimental results are presented that show an AoA measurement range of 0° to over 65° with errors of less than 1.9° for a microwave signal at 2.65 GHz and 12.62 GHz. Results also show the system is capable to measure the AoA of a pseudorandom binary sequence signal at a microwave frequency.

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