Accession Number:

ADA199703

Title:

Vector Space Approach to Narrowband Interference Excision

Descriptive Note:

Final rept.

Corporate Author:

MITRE CORP BEDFORD MA

Personal Author(s):

Report Date:

1988-07-01

Pagination or Media Count:

127.0

Abstract:

To realize the full performance advantage of a pseudonoise spread- spectrum communication system, a receiver must suppress strong narrowband interferers. Conventional frequency-domain excision techniques are complicated by spreading effects due to the sidelobes of the sinxx function. This paper shows that such problems can be avoided by regarding the N samples of a band- limited times series and its finite Fourier transform as a vector in an N- dimensional space. Narrowband interference can be suppressed by projecting the data vector onto the subspace orthogonal to the one that best fits the interference. The theory developed here includes a least squares criterion for finding this subspace.

Subject Categories:

  • Command, Control and Communications Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE