Superimposed Radio Signals for Wireless Sensor Networks

Traditional approaches using superimposed signals in wire- less sensor networks have high demands on the hardware capabilities of a single network node. This work loosens these constraints and de- rives a communication system for low-resource wireless sensor networks requiring no complex signal processing, no fast A/D conversion, no car- rier or phase synchronization. Therefore, it is applicable for low-resource hardware like low-cost networks, RFID or even polymer electronics. It is based on a new modulation technique (ESK) which only uses the power of a signal for encoding and is implemented and evaluated on the pPart particle computer hardware. Various useful applications beyond the state of the art are presented and prove the concept of superimposed signals for wireless sensor networks.