A Non-Destructive Evaluation Application Using Software Defined Radios and Bandwidth Expansion
Technical Report,01 Sep 2018,19 Mar 2020
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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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 236 - 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.
- Test Facilities, Equipment and Methods
- Electrical and Electronic Equipment