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Title: 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:
 [1];  [2]
  1. Albuquerque, NM
  2. Cedar Crest, NM
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
880230
Patent Number(s):
US 6864827
Application Number:
10/686379
Assignee:
Sandia Corporation (Albuquerque, NM)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
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. 2005. "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 = {},
url = {https://www.osti.gov/biblio/880230}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {3}
}

Works referenced in this record:

Ultra-low range sidelobe pulse compression for satellite-borne rain radar
conference, January 1993