Cooperative multi-user detection and ranging based on pseudo-random codes

[摘要] We present an improved approach for a Round Trip Time of Flight distancemeasurement system. The system is intended for the usage in a cooperativelocalisation system for automotive applications. Therefore, it is designed toaddress a large number of communication partners per measurement cycle. Byusing coded signals in a time divison multiple access order, we can detect alarge number of pedestrian sensors with just one car sensor. We achieve thisby using very short transmit bursts in combination with a real timecorrelation algorithm. Futhermore, the correlation approach offers real timedata, concerning the time of arrival, that can serve as a trigger impulse forother comunication systems. The distance accuracy of the correlation resultwas further increased by adding a fourier interpolation filter. The systemperformance was checked with a prototype at 2.4 GHz. We reached a distancemeasurement accuracy of 12 cm at a range up to 450 m.

[学科分类] 电子、光学、磁材料