The Ohio State University

Wei Sun

Bo Chen

Kannan Srinivasan

Kannan Srinivasan Athreya

Vivek Sriram Yenamandra Guruvenkata

An example system for remote sensing of a road surface includes an antenna configured to transmit and receive radiofrequency (RF) signals, where the antenna is configured to attach to a front end of a vehicle; at least one radiofrequency identification (RFID) tag, where the at least one RFID tag is configured to attach to the front end of a vehicle; and an RFID reader, wherein the RFID reader is configured to: cause the antenna to transmit a radiofrequency signal toward a road surface, where the at least one RFID tag receives a backscattered RF signal from the road surface; receive, from the antenna, an RFID signal from the first RFID tag, the RFID signal comprising phase and magnitude information; and analyze the phase and magnitude information to determine a condition of the road surface.

Methods and systems for sensing a road surface

Power line communication (PLC) has significant benefits and advantages in comparison to wireless communication. By exploiting the power line infrastructure, PLC signals can cover a larger area and provide high speed data service without installation of new infrastructure, especially in remote rural areas where Ethernet is not available. A MIMO-based (multiple-input-multiple-output-based) power line communication structure (MU-MIMO-PLC) is described herein and exploits power line infrastructure to achieve MIMO communication and/or high data service. MU-MIMO-PLC exploits the spatiality of power line infrastructure and the multipath property of power line channel. MU-MIMO-PLC leverages these properties to achieve high data rates with MIMO technology. In one embodiment, a system for multi-user (MU) power line communication comprises a power line infrastructure; an access point connected to the power line infrastructure; and clients connected to the power line infrastructure, wherein the clients can communicate with the access point through the power line infrastructure simultaneously.

Growing community of inventors

Columbus, OH, United States of America

Wei Sun