A study on positioning error correction of DS/SS-IVC based on location oriented PN code allocation

In this paper, the positioning system using a direct sequence spread spectrum (DS/SS) inter-vehicle communication (IVC) scheme based on location oriented pseudo noise (PN) code allocation is considered. DS/SS-IVC scheme based on location oriented PN code allocation has a superiority in terms of that the interference of hidden terminal can mitigate. In this scheme, each vehicle determine the PN code based on the location that is estimated by GPS. However, in actuality, this location information is not perfect and this error cause a degradation of communication performance. In order to solve this problem, the positioning system of DS/SS-IVC scheme is studied in this paper. The successive interference cancellation (SIC) scheme, slotted ALOHA scheme with code sensing are applied so as to improve the positioning accuracy. Furthermore, the elimination of ranging data that have large ranging error is also proposed in this paper. By applying these schemes, the positioning accuracy can be improved.