Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications
Abstract
A digital IF receiver (DRX) module directly compatible with advanced radar systems such as synthetic aperture radar (SAR) systems. The DRX can combine a 1 G-Sample/sec 8-bit ADC with high-speed digital signal processor, such as high gate-count FPGA technology or ASICs to realize a wideband IF receiver. DSP operations implemented in the DRX can include quadrature demodulation and multi-rate, variable-bandwidth IF filtering. Pulse-to-pulse (Doppler domain) filtering can also be implemented in the form of a presummer (accumulator) and an azimuth prefilter. An out of band noise source can be employed to provide a dither signal to the ADC, and later be removed by digital signal processing. Both the range and Doppler domain filtering operations can be implemented using a unique pane architecture which allows on-the-fly selection of the filter decimation factor, and hence, the filter bandwidth. The DRX module can include a standard VME-64 interface for control, status, and programming. An interface can provide phase history data to the real-time image formation processors. A third front-panel data port (FPDP) interface can send wide bandwidth, raw phase histories to a real-time phase history recorder for ground processing.
- Inventors:
-
- Albuquerque, NM
- Cedar Crest, NM
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 880230
- Patent Number(s):
- 6864827
- Application Number:
- 10/686379
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2003 Oct 15
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Tise, Bertice L., and Dubbert, Dale F. Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications. United States: N. p., 2005.
Web.
Tise, Bertice L., & Dubbert, Dale F. Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications. United States.
Tise, Bertice L., and Dubbert, Dale F. Tue .
"Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications". United States. https://www.osti.gov/servlets/purl/880230.
@article{osti_880230,
title = {Digital Intermediate Frequency Receiver Module For Use In Airborne Sar Applications},
author = {Tise, Bertice L. and Dubbert, Dale F.},
abstractNote = {A digital IF receiver (DRX) module directly compatible with advanced radar systems such as synthetic aperture radar (SAR) systems. The DRX can combine a 1 G-Sample/sec 8-bit ADC with high-speed digital signal processor, such as high gate-count FPGA technology or ASICs to realize a wideband IF receiver. DSP operations implemented in the DRX can include quadrature demodulation and multi-rate, variable-bandwidth IF filtering. Pulse-to-pulse (Doppler domain) filtering can also be implemented in the form of a presummer (accumulator) and an azimuth prefilter. An out of band noise source can be employed to provide a dither signal to the ADC, and later be removed by digital signal processing. Both the range and Doppler domain filtering operations can be implemented using a unique pane architecture which allows on-the-fly selection of the filter decimation factor, and hence, the filter bandwidth. The DRX module can include a standard VME-64 interface for control, status, and programming. An interface can provide phase history data to the real-time image formation processors. A third front-panel data port (FPDP) interface can send wide bandwidth, raw phase histories to a real-time phase history recorder for ground processing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 08 00:00:00 EST 2005},
month = {Tue Mar 08 00:00:00 EST 2005}
}
Works referenced in this record:
Ultra-low range sidelobe pulse compression for satellite-borne rain radar
conference, April 1993
- Griffiths, H. D.
- The Record of the 1993 IEEE National Radar Conference