Generation of Binary Sequences Having Better Odd Correlation and Linear Complexity Property Compared to Gold Codes for use in Global Navigation Satellites Systems (GNSS) Applications
Dileep Dharmappa, Mahalinga V. Mandi, S Ramesh · 2017 International Conference on Current Trends in Computer, Electrical, Electronics and Communication (CTCEEC) · 2017
Often in GNSS systems due to environmental issues the desired signal to be received may be degraded and attenuated due to multipath or some other reasons. Also the binary sequences used in GNSS systems are having low linear complexity and hence are easy to attack. To overcome above said problems it is essential to propose a method to generate binary sequences derived from chaotic real sequences which are found to have better odd correlation property than the GPS Ll C/A Signal and hence are more resistant to environment variations such as multipath or interference. The binary sequences generated from the proposed method are found to have very large linear complexity as compared with GPS Ll C/A Signals. This paper also presents the odd correlation properties of 32 GPS Ll C/A sequences, and compared with the odd correlation properties of the generated sequences in detail.