A 0.14µJ Per-Acquisition Frequency Domain GPS Correlator Using Adaptive Compressive Sampling

Global Positioning System (GPS)-based localization services play a critical role in industrial, agricultural, and wearable applications. To acquire its location (Acquisition), a GPS receiver (Rx) performs intensive processing on signals transmitted by orbiting satellites. This processing dominates energy consumption, restricting broader adoption of GPS technology in energy-constrained applications. This paper presents a correlator that uses Adaptive Compressive Sampling (CS) to significantly reduce the energy consumption in GPS Rx by reducing the number of operations (opCount) involved in Acquisition.