A Non-Destructive Evaluation Application Using Software Defined Radios and Bandwidth Expansion
Abstract
The development of low-complexity, lightweight and low-cost Non-Destructive Evaluation (NDE) equipment for microwave device testing is desirable from a maintenance efficiency and operational availability perspective. Current NDE equipment tends to be custom-designed, cumbersome and expensive. Software Defined Radio (SDR) technology, and a bandwidth expansion technique that exploits a priori transmit signal knowledge and auto-correlation to effect received signal reconstruction provides a potential solution. This research investigated the reconstruction of simultaneous SDR receiver instantaneous bandwidth (sub-band) collections. The adjacent sub-bands collectively spanned a transmit signal bandwidth. Research culminated in a 100 MHz bandwidth uniform white noise transmit signal reconstruction. The transmit signal provided near true-noise characteristics (2^{36} - 1 non-repeatable sequences). The reconstructed bandwidth exceeded a single B205 SDR receiver instantaneous bandwidth and provided accurate symbol recovery for the inherent SDR Energy per Symbol to Noise Power Spectral Density.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 19, 2020
- Accession Number
- AD1104214
Entities
People
- Nicholas J. O'brien
Organizations
- Air Force Institute of Technology