University of South Florida
In this paper, the authors propose a novel WSN framework for one fusion center to monitor simultaneously multiple Source Events (SEs), each of which has multiple states. In the proposed WSN, every SE is observed by a range of local sensors, which convey their observations to the fusion center in the principles of Direct-Sequence Code-Division Multiple-Access (DS-CDMA) associated with M-ary Orthogonal Modulation (MOM). Therefore, the proposed WSN is referred to as the MOM DS-CDMA WSN. In the MOMDS-CDMAWSN, the local sensors monitoring the same SE transmit their signals to the fusion center in the principles of Time-Division Multiple-Access (TDMA), while the local sensors serving different SEs communicate with the fusion center in the principles of DS-CDMA.