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Performance Evaluation of RF Systems on Rotorcrafts

Griffith, Khadir A.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1274103965

Abstract Details

2010, Master of Science, Ohio State University, Electrical and Computer Engineering.
RF systems onboard rotorcrafts are susceptible to a periodic variation in both the magnitude and phase of the received signals due to the rotation of the rotor blades. This is often referred to as rotor blade modulation (RBM). As its name indicates, RBM causes a modulation of the incident signal, which is dependent on the frequency and direction of the incident signal. As one might imagine, RBM has the potential to degrade a given RF system. Therefore, RBM must be accounted for when characterizing the performance of any RF system onboard a rotorcraft. The first part of this thesis develops methods for incorporating RBM in computer or hardware-in-the-loop (HITL) simulations of RF systems onboard rotorcrafts. The methods are verified using the response of an antenna mounted on a simple rotorcraft that is analyzed through numerical electromagnetic computations as well as characterized by measurements. In the second part of this thesis the effects of RBM on digital communication systems are discussed. It is demonstrated that one can mitigate the effects of RBM within the receiver using spatial diversity and simple equalization techniques.
Inder Gupta, PhD (Advisor)
Joel Johnson, PhD (Committee Member)
148 p.
Electrical Engineering
Rotor Blade Modulation; RF Systems; Hardware-in-the-Loop (HITL); Digital Communications

Recommended Citations

Citations

  • Griffith, K. A. (2010). Performance Evaluation of RF Systems on Rotorcrafts [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274103965

    APA Style (7th edition)

  • Griffith, Khadir. Performance Evaluation of RF Systems on Rotorcrafts. 2010. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1274103965.

    MLA Style (8th edition)

  • Griffith, Khadir. "Performance Evaluation of RF Systems on Rotorcrafts." Master's thesis, Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274103965

    Chicago Manual of Style (17th edition)

osu1274103965
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© 2010, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.