A programmable multi-GNSS baseband receiver
Vinh T. Tran, Nagaraj Channarayapatna Shivaramaiah, Oliver Diessel, Andrew Graham Dempster · 2015
This paper assesses the drawbacks in reconfigurability and resource consumption of the conventional baseband signal processing circuitry for modern Global Navigation Satellite Systems (GNSSs) signals. The involvement of new GNSSs leads to the requirement of designing a programmable multi-GNSS baseband receiver that can be reconfigured across GNSS signals. Paralleling baseband circuits is the easiest approach, but resource consumption will significant. Hardware time multiplexing is more effective technique. It, however, requires an efficient memory hierachy and an efficient code generator design. These challenges are tackled in the proposed architecture which utilises as 3.2%, 6.6%, 12.5% and 50% resources as the conventional baseband circuitry consisting of 16 GPS L1 C/A channels, 8 BEIDOU B1I channels, 4 GALILEO E1 channels, and 1 GPS L5 channel, respectively. Results are also justified by mathematical analysis.