id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
american_scientific_journal-919	Camilo Reynoso, William Ernesto; Aguilar, Luis Joyanes	Traceability and Inventory Online by Integrating GPS and RFID in a Geographic Information System ¨GIS¨	2015	12	.pdf	application/pdf	2780	124	50	The equation that represents this DS-SS signal is: 2 ( ) ( ) cos(2 )s ss c s ES m t p t f t T π θ= + (1) where: m(t) → is the Sequence of Data to transmit RFID or GPS p(t) → Pseudo Noise sSequence is fc → is the Frequency of the Carrier θ → is the Angle of the Phase of the Carrier when t = 0 TS → is the Time duration of each Symbol of m (t) data In this type of modulation Digital Information Signal is modulated by a Pseudo Random Sequence (PN), with a speed much greater than the Information Signal and then transmitted using any type of Digital Modulation as shown in the following figure 3: Geographic Information System GIS	cache/american_scientific_journal-919.pdf	txt/american_scientific_journal-919.txt