Cart (Loading....) | Create Account
Close category search window
 

Performance metrics for windows used in real-time DFT-based multiple-tone frequency excision

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Young, J.A. ; Harmon Ind., Grain Valley, MO, USA ; Lehnert, J.S.

The capability of direct-sequence spread-spectrum receivers to reject narrowband interference can be significantly improved by eliminating narrowband energy in the received signal through a real-time discrete Fourier transform (RT-DFT) process. However, the loss in received signal strength due to this frequency excision process can be significant. In this paper, we present a theoretical framework for evaluating the performance of alternative combinations of time weighting functions (windows), fractions of overlap in overlap-and-add architectures, and frequency-domain mapping algorithms. The sensitivity loss due to time weighting is presented for variable overlaps and several different windows. A set of window metrics is defined that provides a means of calculating distortion losses for an arbitrary number of interfering tones with uniformly distributed center frequencies. Theoretical results are confirmed by simulation. These results can be used to compare sensitivities of alternative RT-DFT frequency excision direct-sequence spread-spectrum systems and to calculate the standoff range of a finite number of in-band tone emitters

Published in:

Signal Processing, IEEE Transactions on  (Volume:47 ,  Issue: 3 )

Date of Publication:

Mar 1999

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.