Rehabilitation therapies are widely employed to assist people with motor impairments in regaining control over their affected body parts. Nevertheless, factors such as fatigue and low self-efficacy can hinder patient compliance during extensive rehabilitation processes. Utilizing hand redirection in virtual reality (VR) enables patients to accomplish seemingly more challenging tasks, thereby bolstering their motivation and confidence. While previous research has investigated user experience and hand redirection among able-bodied people, its effects on motor-impaired people remain unexplored. In this paper, we present a VR rehabilitation application that harnesses hand redirection. Through a user study and semi-structured interviews, we examine the impact of hand redirection on the rehabilitation experiences of people with motor impairments and its potential to enhance their motivation for upper limb rehabilitation. Our findings suggest that patients are not sensitive to hand movement inconsistency, and the majority express interest in incorporating hand redirection into future long-term VR rehabilitation programs.

In LTE system, sounding reference signal (SRS) is transmitted for channel detection to obtain uplink scheduling gain. However, in multiple-beam mobile satellite communication system (MMSCS), large inter-beam and intra-beam interference destroy orthogonality for SRS from different users and lead to lower received SNR. Subsequently, the system cannot predict the channel exactly and will suffer from performance loss. In this paper, an interference cancellation and coordination scheme is presented. This new scheme, by taking MMSCS resources and channel conditions into account, can improve SRS performance after reducing and avoiding interference. One aspect of the presented method is interference cancellation scheme which comprises resending scheme for inter-beam interference and orthogonality enhancement scheme for intra-beam interference. Another aspect is interference coordination scheme, which carries out short SRS hopping between users and acquires the full bandwidth information by several detections. Simulation results confirm the correctness and effectiveness of the above scheme.