The Research of Ushiki-Map Chaos PRN in SoL Data Signal of Galileo System

The signals of Galileo system were assigned by navigation systems panel (NSP). Some detailed characteristic of RF signals was civil aviation. But it needed some easy way to select out from the other signals such as GPS signal. So BOC modulation was recommend to the Galileo system. The key element of BOC was the PRN which was a stochastic and orthogonal signal. The Ushiki-Map chaos sequence was used to represent the PRN was a good way to modulate the RF signal of Galileo system. It was a two-dimension map in time domain. The space station of Galileo system used chaos BOC modulation; the earth station of it used chaos CDMA2000. The chaos way was enhanced the performance of Galileo system and simplify the structure of modulation which had practicability.