GPS (Navigation Satellite Timing And Ranging / Global Positioning System) is a satellite based navigaiton system. It is more and more popularly used in every-day life. The modern standard GPS receivers are commonly based on ASIC for signal processing. The main strengths of using ASIC for signal processing include its speed and sensitiveness. However, the downside is the cost of re-designing, and it is unable to re-programmed. The GPS software receiver, which is different from the ordinary receiver, performs all the operations in a programmable microprocessor, making the system highly flexible. This advantage is very usable when different algorithms should be tested, and also in cases where the GPS signals change.Hereby we are using an external hardware circuit board, which consists of Zarlink GP 2015 and GP 4020, to collect the GPS signal, convert it to IF and sample it into digital signal. After transferring the signal to the PC, do the acquisition and tracking using C++ and Matlab, then we will get the navigation data from the GPS signal. After the... |