Abstract
In previous papers, we presented a navigational autonomy aid system, which was tested by sighted people and reached a high level of satisfaction. However our new positioning technique is suitable for blind users as well as sighted since the user is able to wear or carry the reader. The system consists of a line-of-sight QR-code detector and the signal attenuation of active RFID tags using a wearable reader, which is non-line-of-sight. The aim of this chapter is to present user feedback from the perspectives of blind people. A significant outcome of the usability test on blind participants is that to meet the requirements of blind users, the system must work in an integrated manner.