Matched-Spectrum Interference on GPS Receivers; A State-of-the-Art Analysis

Spread spectrum, especially Code Division Multiple Access (CDMA), is a key concept in radio engineering and communications. Originally used in military applications, its primary aim is to resist intentional interference (Anti-Jam; AJ) and conceal communications (Low Probability of Intercept; LPI). This paper mathematically explores disruptive waveform design for Global Positioning System (GPS) spread spectrum signals. By successfully employing Gold spreading codes, the study numerically analyzes matched-spectrum interference effects on a GPS receiver. Results indicate the designed waveform outperforms ordinary intentional disruptions that offer legacy techniques to saturate a naïve receiver. In addition, this peculiar technique has an added advantage of Low Probability of Detection (LPD) and can be extrapolated to induce Denial-of-Service (DoS) in even intelligent GPS receivers.