Jammers in the commercial world of GPS

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:418718

Wollschlager, B ^[1]

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1. Rockwell International Corp., Cedar Rapids, IA (United States). Collins Avionics and Communications Div.

The military world of electronic countermeasures is an enviromnent where receivers are designed to perform in a high level of interference or jamming. The electronic battlefield is full of radio frequency interference, both intentional and unintentional, which disrupts communications, fools radar, overloads guidance systems, and in general causes havoc with sensitive electronic systems such as GPS receivers. The commercial radio world is also becoming more electronically hazardous. The FCC has adopted certain emission standards which attempt to control how much ``noise`` electronic devices give off; however, these standards are much less stringent than their military counterparts. For GPS signals with typical power levels of {minus}125 dBm the interfering signals can pose a large in-band or near-band problem. Because the spread spectrum signal exists below thermal noise, any in-band noise also poses a large challenge to GPS reception. Harmonics from a cellular phone, a UHF radio, or a personal computer can cause a GPS receiver to be unable to navigate. Recognition of this problem is causing filter performance profiles such as ARINC 743A and others to become popular for GPS receiver interference rejection. This paper is based on Rockwell`s experience on Navstar GPS programs such as PLGR.

• OSTI ID: 418718
• Report Number(s): CONF-9409185--
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
42 ENGINEERING
ELECTRIC FILTERS
ELECTRIC-POWERED VEHICLES
ELECTRONIC GUIDANCE
INTERFERENCE
PERFORMANCE
RADIO EQUIPMENT
RADIO NOISE
SIGNAL DISTORTION
SOLAR ELECTRIC PROPULSION