Robustness of Modified FBMC-SS Against Partial-Band Noise-Like Interference

As spectrum has grown more congested, there has been a greater emphasis on interference-robust low-signal-to-noise ratio (SNR) waveforms capable of operating under interference from other users and under hostile jamming. Traditional robust waveforms have limitations of only being robust against certain types of partial-band interference. A modification on the existing scheme of filterbank multicarrier spread-spectrum (FBMC-SS) is proposed that pseudo-randomly maps spread data chips to different time and frequency locations within a packet. The intended effect of this is to allow the decoder to consider and notch noise-like interference independent of its location in time and frequency. Additionally, the effects of this interference on joint frequency, time, and phase estimation are considered. The Cramér- Rao variance bounds (CRVBs) are derived for joint estimation of these values for arbitrary locations of pilots that are and are not under interference. These CRVBs are considered for different pilot mapping schemes and different interference and jamming scenarios, finding that a pseudorandom uniform pilot mapping scheme is optimal for resistance to interference and jamming.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Electrical Engineering

Department dc:contributor.department

Electrical Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2025

Author dc:creator

• Barrett, Christopher Silas

Chair dc:contributor.committeechair

• Gaeddert, Joseph Daniel

Committee members dc:contributor.committeemember

• Talty, Timothy Joseph
• Michaels, Alan J.

• filterbank multi-carrier communications
• interference mitigation
• spread-spectrum communications
• Cramer-Rao variance bound

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

vt_gsexam:44458

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/137476