Data tracking and effect of frequency offset to simultaneous collecting method for wireless sensor networks

In the packet access of wireless sensor network, the access protocol for avoiding packet collision causes the delay. Therefore, the real time data collection is difficult. In the wireless communication for simultaneous data collection (WC-SDC), the sensed data is projected to the parameters of the wireless communication. The specific feature of sensed data appears in the received signals. Therefore, even if the data transmissions are simultaneous, the sensed data can be decomposed by the specific feature. However, the frequency mismatch causes the fluctuation of sensed data. It gives the significant impact to data decomposition. This paper uses the data tracking as the data decomposition in WC-SDC. We clarify the accuracy of data decomposition and the impact from the frequency offset.