International Journal of Advanced Research in Computer Science & Technology (IJARCST)
The primary goal of the software receiver is to minimize the hardware used in a receiver. It permits to upgrade of the receiver easily to new signal structure and support other navigational systems (example-GPS, Galileo, COMPASS and IRNSS). It uses Analog-to-Digital Converter (ADC) to change the input Radio Frequency (RF) signals into digital data at the earliest possible stage in the receiver. In other words, the input signal is digitized as close to the antenna as possible. Once the signal is digitized, software-based digital signal processing will be used to obtain and process the digital signal. The steps involved in software receiver are acquisition, tracking, data decoding and navigation solution.