Accession Number:

ADA556526

Title:

Coherent Distributed Radar for High-Resolution Through-Wall Imaging

Descriptive Note:

Progress rept. no. 22

Corporate Author:

INTELLIGENT AUTOMATION INC ROCKVILLE MD

Personal Author(s):

• van Doorn, Eric
• Ponnaluri, Satya

Report Date:

2012-02-01

Pagination or Media Count:

3.0

Abstract:

In this reporting period, we are continuing to collect indoor data and processing the scans for improving the indoor range accuracy. Since the transceivers are very tightly synchronized, the transmission phase and time and the phase use for down conversion are well-controlled and repeatable as we perform the experiments. As a result, we observe a clear correlation between the range error and the correlation amplitude. In Figure 1, we show the Correlator output for data with very large positive, or very large negative range error. The data show that for large Correlator output, a positive range error is observed, and for small Correlator output, a negative range error is observed. This result is not unexpected these two cases correspond to constructive and destructive multipath interference, respectively. This observation suggests that we can improve the range accuracy by methods that are based on channel estimation, such as successive interference cancelation. We are continuing to take more data and develop algorithms for improved range accuracy based on both channel estimation and digital beam forming. We also are developing algorithms for bistatic radar imaging.

Descriptors:

• *ACCURACY
• *COHERENT RADAR
• *HIGH RESOLUTION
• *RADAR IMAGES
• *RADAR SCANNING
• *RANGE(DISTANCE)
• *WALLS
• ALGORITHMS
• BEAM FORMING
• BISTATIC RADAR
• CORRELATORS
• ERRORS
• MULTIPATH TRANSMISSION
• RADAR INTERFERENCE
• TRANSMITTER RECEIVERS

Subject Categories:

• Electrical and Electronic Equipment
• Active and Passive Radar Detection and Equipment
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE