Abstract
Backscatter communication is a promising technology to enhance the signal strength received by the receiver in straight tunnel environments. The impact of the number of tags and their phase adjustment on system performance remains a challenging issue though. Therefore, in this letter, we investigate the channel gain of backscatter-assisted communication with multiple tags in straight tunnels. In particular, we derive the probabilities that the backscatter link gain is greater than the direct link under adjustable and random phase assumptions by applying the Gaussian and Gamma approximations to derive tractable expressions. The simulation results show that phase-adjustable tags significantly improve the channel gain of the backscatter links compared to the random phase case. Moreover, the number of tags has an upper threshold for an effective tag deployment pattern. These insights provide valuable guidelines for the efficient design of backscatter communication systems in tunnel environments.
| Original language | English |
|---|---|
| Pages (from-to) | 1160-1164 |
| Number of pages | 5 |
| Journal | IEEE Wireless Communications Letters |
| Volume | 15 |
| DOIs | |
| Publication status | Published - 2026 |
Free Keywords
- Approximate method
- backscatter-assisted
- high-speed railways
- phase control
- straight tunnel scenario
- tag number
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering