We have experimentally demonstrated that concurrent transmissions are feasible in low data-rate IR-UWB networks. We have also shown that interference mitigation techniques are indeed necessary at the physical layer. In particular, because it is the first component for the reception of a packet, we have focused on packet detection and timing acquisition. We have shown that a traditional scheme is not robust against multiuser interference, and prevents concurrent transmissions. On the contrary, a scheme designed to take MUI into account, even with a very simple interference mitigation scheme, allows for concurrent transmissions, even in strong near-far scenarios. For future work, we will add real-time processing capabilities on the FPGA board. We will also implement channel coding, a robust demodulation scheme for the payload and add an automatic gain control (AGC) algorithm jointly with an automated way to set the hard decision thresholds.
展开▼
