DocumentCode :
3162013
Title :
Cooperative Multi-User Detection and Localization for Pedestrian Protection
Author :
Morhart, Christian ; Biebl, Erwin ; Schwarz, Daniel ; Rasshofer, Ralph
Author_Institution :
Fachgebiet Hochstfrequenztechnik, Tech. Univ. Munchen, Munich
fYear :
2009
fDate :
16-18 March 2009
Firstpage :
1
Lastpage :
5
Abstract :
In the proposed cooperative sensor system pedestrians carry a reactive transceiver which is interrogated by a localization and tracking unit in the car. The prototype system applies round-trip time-of-flight (RTOF) techniques for the determination of the distance between the transponder and the demonstrator vehicle. A smart antenna array integrated into the car is used to determine the direction-of-arrival (DoA) of the transponder´s response signal. Knowing the distance and azimuth angle relative to the car, the pedestrian´s position and movement are calculated. These data are used as input for a highly reliable collision warning and collision mitigation system. The sensor system is capable of addressing a huge number of communication partners within each measurement cycle. Additionally secure burst identification is ensured for a robust localization and the suppression of unwanted co-channel interference. This is achieved by using pseudo random coded signals with a time division multiple access (TDMA) method. The distance accuracy was improved by introducing a new mirror technique in combination with an interpolation algorithm. The prototype localization system set up at 2.4GHz covers a range up to 200m in free field condition. With the current system a distance resolution down to cm and an angular measurement accuracy of about 1 degree have been achieved.
Keywords :
antenna arrays; cooperative systems; direction-of-arrival estimation; multiuser detection; random sequences; time division multiple access; transceivers; transponders; angular measurement accuracy; collision mitigation system; cooperative sensor system; demonstrator vehicle; direction-of-arrival; interpolation algorithm; multiuser detection; pedestrian protection; pseudorandom coded signals; reactive transceiver; reliable collision warning; round-trip time-of-flight; smart antenna array; time division multiple access; tracking unit; transponder response signal; Antenna arrays; Directive antennas; Multiuser detection; Protection; Prototypes; Sensor systems; Time division multiple access; Transceivers; Transponders; Vehicles; Cooperative Sensor Technology; Direction-of-Arrival; Kalman-Filter; MUSIC; Round-Trip Time-of-Flight; Time Division Multiple Access;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
Type :
conf
DOI :
10.1109/GEMIC.2009.4815863
Filename :
4815863
Link To Document :
بازگشت