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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
Issue Date:
Research Org.:
Sandia Corporation
OSTI Identifier:
880230
Patent Number(s):
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. 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 = {2005},
month = {3}
}

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