Accession Number:

AD1076185

Title:

Direct Path Interference Suppression and Received Signal Processing for OFDM Passive Radar

Descriptive Note:

[Technical Report, Master's Thesis]

Corporate Author:

AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

2019-03-21

Pagination or Media Count:

104

Abstract:

Passive bistatic radar PBR is a fairly active area of research due to the opportunities offered by the ability to use emitters of opportunity for target detection and tracking as well as Synthetic Aperture Radar SAR imaging. There is an increasing variety and availability of signals that can be exploited for passive radar and there is also the advantage of angular diversity offered by the bistatic geometry and the potential for stealth operations axBorded a passive receiver. Notwithstanding its merits, PBR is complicated by the inevitable presence of Direct Path Interference DPI from the transmitter to the receiver, which can be orders of magnitude stronger than the echo signals from the targets of interest, resulting in missed targets. In addition, available signals are characterized by features necessary for the purpose for which they are designed, but that are not suited to radar applications due to the introduction of ambiguities in range and Doppler that mimic real targets. This thesis seeks to articulate two specific challenges of PBR in the context of SAR imaging using OFDM signals - DPI and range ambiguities, and the signal processing necessary to mitigate their effects. MATLABregistered trademark simulated scenarios are used throughout the work to illustrate the problem and solutions.

Subject Categories:

  • Active and Passive Radar Detection and Equipment

Distribution Statement:

[A, Approved For Public Release]