Radio frequency interference effect on PN code sequence lock detectorThe authors find the probabilities of detection and false alarm of the pseudonoise (PN) sequence code lock detector when strong radio frequency interference (RFI) hits the communications link. Both a linear model and a soft-limiter nonlinear model for a transponder receiver are considered. In addition, both continuous wave (CW) RFI and pulse RFI are analyzed, and a discussion is included of how strong CW RFI can knock out the PN code lock detector in a linear or a soft-limiter transponder. As an example, the Space Station Freedom forward S-band PN system is evaluated. It is shown that a soft-limiter transponder can protect the PN code lock detector against a typical pulse RFI, but it can degrade the PN code lock detector performance more than a linear transponder if CW RFI hits the link.
Document ID
19920072197
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kwon, Hyuck M. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Tu, Kwei (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Loh, Y. C. (Lockheed Engineering and Sciences Co. Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Communications And Radar
Meeting Information
Meeting: MILCOM ''91- IEEE Military Communications Conference