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You searched for +publisher:"Worcester Polytechnic Institute" +contributor:("Srikanth Pagadarai, Committee Member"). Showing records 1 – 2 of 2 total matches.

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1. Franzini, Cecelia R. Waveform Design for Ground-Penetrating Radar.

Degree: MS, 2015, Worcester Polytechnic Institute

A ground-penetrating radar is being designed to find subterranean structures. This is difficult to do because of varying mediums. Having more bandwidth can help mitigate this problem. Because the frequency spectrum is so cluttered, one method to do this is to use non-contiguous orthogonal frequency division multiplexing (NC-OFDM) to occupy several free areas of the spectrum. An NC-OFDM waveform was designed and optimized with respect to peak-to-average-power ratio, orthogonality, spectral leakage and autocorrelation sidelobes. Techniques such as the use of a Zadoff-Chu sequence and a gap filling algorithm were implemented to do this. The waveform was tested in simulation to show that while computationally expensive, this may be a viable waveform for ground-penetrating radar. Advisors/Committee Members: Alexander M. Wyglinski, Advisor, Thomas Gannon, Committee Member, Srikanth Pagadarai, Committee Member, Kevin Cuomo.

Subjects/Keywords: OFDM; radar

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Franzini, C. R. (2015). Waveform Design for Ground-Penetrating Radar. (Thesis). Worcester Polytechnic Institute. Retrieved from etd-042915-143437 ; https://digitalcommons.wpi.edu/etd-theses/509

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Franzini, Cecelia R. “Waveform Design for Ground-Penetrating Radar.” 2015. Thesis, Worcester Polytechnic Institute. Accessed October 30, 2020. etd-042915-143437 ; https://digitalcommons.wpi.edu/etd-theses/509.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Franzini, Cecelia R. “Waveform Design for Ground-Penetrating Radar.” 2015. Web. 30 Oct 2020.

Vancouver:

Franzini CR. Waveform Design for Ground-Penetrating Radar. [Internet] [Thesis]. Worcester Polytechnic Institute; 2015. [cited 2020 Oct 30]. Available from: etd-042915-143437 ; https://digitalcommons.wpi.edu/etd-theses/509.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Franzini CR. Waveform Design for Ground-Penetrating Radar. [Thesis]. Worcester Polytechnic Institute; 2015. Available from: etd-042915-143437 ; https://digitalcommons.wpi.edu/etd-theses/509

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Sail, Amit P. Hardware Implementation of Filtering Based Sidelobe Suppression for Spectrally Agile Multicarrier based Cognitive Radio Systems.

Degree: MS, 2013, Worcester Polytechnic Institute

Due to the ever increasing dependency on existing wireless technologies and the growing usage of sophisticated wireless devices, the demand for bandwidth is rising exponentially. Also, the Federal Communications Commission (FCC) has reserved a considerable amount of spectrum for licensed users. As a result, the unlicensed spectrum usage is constrained to the overcrowded unlicensed spectrum. Various spectral management surveys have indicated inefficient spectrum utilization in the licensed spectral bands. The congested unlicensed spectrum and inefficiently used licensed frequency bands calls for an approach to use the available spectrum opportunistically. Therefore, the concept of "Spectrum Pooling", which is based on Dynamic Spectrum Access (DSA), was proposed to make the unused sections of licensed spectrum available to the unlicensed users. In Spectrum Pooling, an empty section of licensed spectrum is borrowed by a secondary user for certain period of time without interfering with the licensed user. Orthogonal Frequency Division Multiplexing (OFDM) is a transmission scheme that is a candidate for Spectrum Pooling since it is capable of forming an adaptive spectral shape that allows coexistence of licensed and unlicensed users while attemting to minimize any interference. Subcarriers in the OFDM signal can be deactivated to generate Non-Contiguous OFDM (NC-OFDM). Even though NC-OFDM allows efficient use of available spectrum, it causes out of band (OOB) radiation, which adversely affects the performance of adjacent user. This thesis presents two novel techniques for combat the effects of OOB radiation generated by NC-OFDM. The proposed techniques employ a filtering-based approach combined with the technique of windowing in order to suppress the unwanted sidelobes by around 35dB-40dB. The attenuation is achieved without affecting other transmission parameters of the secondary user significantly. Advisors/Committee Members: Alexander M. Wyglinski, Advisor, Srikanth Pagadarai, Committee Member, Thomas Eisenbarth, Committee Member.

Subjects/Keywords: OOB; Cognitive Radio; USRP2; Sidelobe Suppression; NC-OFDM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Sail, A. P. (2013). Hardware Implementation of Filtering Based Sidelobe Suppression for Spectrally Agile Multicarrier based Cognitive Radio Systems. (Thesis). Worcester Polytechnic Institute. Retrieved from etd-011113-120428 ; https://digitalcommons.wpi.edu/etd-theses/63

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Sail, Amit P. “Hardware Implementation of Filtering Based Sidelobe Suppression for Spectrally Agile Multicarrier based Cognitive Radio Systems.” 2013. Thesis, Worcester Polytechnic Institute. Accessed October 30, 2020. etd-011113-120428 ; https://digitalcommons.wpi.edu/etd-theses/63.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Sail, Amit P. “Hardware Implementation of Filtering Based Sidelobe Suppression for Spectrally Agile Multicarrier based Cognitive Radio Systems.” 2013. Web. 30 Oct 2020.

Vancouver:

Sail AP. Hardware Implementation of Filtering Based Sidelobe Suppression for Spectrally Agile Multicarrier based Cognitive Radio Systems. [Internet] [Thesis]. Worcester Polytechnic Institute; 2013. [cited 2020 Oct 30]. Available from: etd-011113-120428 ; https://digitalcommons.wpi.edu/etd-theses/63.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sail AP. Hardware Implementation of Filtering Based Sidelobe Suppression for Spectrally Agile Multicarrier based Cognitive Radio Systems. [Thesis]. Worcester Polytechnic Institute; 2013. Available from: etd-011113-120428 ; https://digitalcommons.wpi.edu/etd-theses/63

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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