Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Bandwidth utilization maximization of scientific RF communication systems

Technical Report ·
DOI:https://doi.org/10.2172/434435· OSTI ID:434435
 [1];  [2];
  1. Sandia National Lab., Albuquerque, NM (United States)
  2. New Mexico State Univ., Las Cruces, NM (United States)

A method for more efficiently utilizing the frequency bandwidth allocated for data transmission is presented. Current space and range communication systems use modulation and coding schemes that transmit 0.5 to 1.0 bits per second per Hertz of radio frequency bandwidth. The goal in this LDRD project is to increase the bandwidth utilization by employing advanced digital communications techniques. This is done with little or no increase in the transmit power which is usually very limited on airborne systems. Teaming with New Mexico State University, an implementation of trellis coded modulation (TCM), a coding and modulation scheme pioneered by Ungerboeck, was developed for this application and simulated on a computer. TCM provides a means for reliably transmitting data while simultaneously increasing bandwidth efficiency. The penalty is increased receiver complexity. In particular, the trellis decoder requires high-speed, application-specific digital signal processing (DSP) chips. A system solution based on the QualComm Viterbi decoder and the Graychip DSP receiver chips is presented.

Research Organization:
Sandia National Labs., Albuquerque, NM (United States)
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC04-94AL85000
OSTI ID:
434435
Report Number(s):
SAND--97-0154; ON: DE97002703
Country of Publication:
United States
Language:
English

Similar Records

Systolic array architecture for convolutional decoding algorithms: Viterbi algorithm and stack algorithm
Thesis/Dissertation · Tue Dec 31 23:00:00 EST 1985 · OSTI ID:6891535

SAW correlator spread spectrum receiver
Patent · Tue Apr 01 00:00:00 EDT 2014 · OSTI ID:1128692

Final Report on LDRD Project: High-Bandwidth Optical Data Interconnects for Satellite Applications
Technical Report · Mon Mar 31 23:00:00 EST 2003 · OSTI ID:810684