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GPS is widely used by civil aviation, financial institutions and transport sector and other civilian sectors, as well as for military purposes, thus the research on GPS spoof is of considerable merits. This paper analyzes the roots of forgeability and dupability of civil GPS signal; then, according to the characteristics of GPS civil signal, four forgery patterns of GPS spoofing signals are presented,...
There are two main techniques to disable GPS user receivers from performing navigation fix, either causing interference on transmission route segment or using directional signal radiation on satelliet segment. This paper introduces a new Denial of Service (DoS) technique of GPS receivers that operates on the user segment, which is based on hidden messages from the user segment. The paper focuses on...
Aiming at the authentication of civilian signals broadcasted by currently orbiting GPS satellites, this paper proposes a new technique, which carries GPS authentication information by the messages hidden in the navigation message and, without affecting the position fixing of GPS receivers in use all over the world, appends the capability of authenticity verification to current civilian GPS signals...
The GPS system is capable of the one-way communication (OWC) transmitting non-navigational information if the reserved bits of L1C Nav message and the newly-added CNav message types for L2C signal are utilized. Excluding the potential communication protocol overheads, a single frequency with one satellite transmits data at 0.5B/s; with the dual frequency transmission by using L1C and L2C frequencies...
The GPS system is capable of one-way communication (OWC) if the reserved bits of navigation message are utilized. Excluding the potential communication protocol overheads, a single frequency with one satellite transmits data at 0.5B/s; with the dual frequency transmission by using L1C and L2C frequencies, the parallel transmission of multiple satellites and the data compression, the transmission rate...
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