GPS, GLONASS, BeiDou, and Galileo are representative GNSS(Global Navigation Satellite Systems). Each satellite signal for navigation designed by principal states uses modulation method such as BPSK, QPSK, BOC, MBOC, etc. and primary code for ranging between satellite and receiver and secondary code for improvement tracking sensitivity. Multi-GNSS based receivers have researched and commercialized according to these GNSS operation. These multi-GNSS receivers provide superior position information than signal-GNSS based receivers. However, as new satellite signals for navigation are studied by many countries, GNSS receivers should be consistently changed. Each design for counteracting new GNSS signals demand extra-costs. Therefore, design of reconfigurable GNSS receiver structure using minimum cost is required for counteracting new satellite navigation signals. In this paper, satellite signals of GPS, GLONASS, BeiDou, and Galileo were introduced for design of reconfigurable GNSS receiver structure. essential structures for signal processing are drawn from receiver structures of each satellite signal. Finally, this paper showed reconfigurable GNSS receiver structure. proposed GNSS receiver structure can be expected to be used as a more flexible approach for receiving multiple GNSS signals and new satellite signals.

Keywords: GNSS receiver, reconfigurable structure, GNSS signal type