Improving Performance of DS/SS IVC Scheme based on Location Oriented PN Code Allocation by Restricting Communication Distance

摘要

In this paper, the performance of inter vehicle communication (IVC) is evaluated when direct sequence spreads spectrum (DS/SS) communication using slotted ALOHA for the media access control (MAC) protocol is applied. It is possible to reduce the influence of near-far problem and multiple access interference by using successive interference cancellation (SIC). However, the inter-symbol interference still remains as a problem when the communication distance is wider or the GPS positioning error occurs. This paper shows that the performance of DS/SS IVC based on location oriented PN code allocation is improved by restricting communication distance, because the probability of inter-symbol interference is reduced. And, the influence of GPS positioning error is also evaluated.