Modeling Heterogeneous Systems Using SystemC-AMS Case Study: A Wireless Sensor Network Node

Abstract The paper presents a preliminary approach for the modeling and simulation of a simple but complete Wireless Sensor Network with two nodes using SystemC-AMS, an open-source C++ library dedicated to the description of heterogeneous systems containing digital, analog, RF hardware parts as well as embedded software. The WSN node, or mote, detailed herein consists of a physical sensor, a continuous time sigma-delta converter with its associated decimation lter, an ATMEGA128 8-bit microcontroller running the embedded application and a QPSK-based 2.4 GHz RF transceiver. The node has been designed to be interoperable with both the XBow MICAZ hardware platform and the TinyOS operating system in a near future. The paper starts with the structural description of the system as a hierarchical set of behavioural modules, then gives an insight on how multi-frequency simulation is handled in SystemC-AMS, and nally presents simulation results that are systematically compared with the Matlab reference in terms of accuracy and simulation time. I