Indoor blockage in a millimeter wave (mmWave) wireless communication link introduces significant signal attenuation. Solving the indoor blockage problem is critical to effectively using the unlicensed 60 GHz band spectrum. This work used various V-band horn antennas to collect signal measurements in an indoor lab environment. As an object blocks the Tx- Rx line of sight (LOS) path, the signal fades deeply. Experimental results showed that switching to a wider beam with lower gain has the potential to partially restore or maintain a communicating link. Effective beam switching and coordinated beam steering can shorten deep fades which is crucial for mm Wave communication systems that are very sensitive to the spatial characteristics of the environment. The experimental results in this paper thus motivate the design of future indoor mm Wave antennas capable of beam switching and facilitate fast beam search.
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This content will become publicly available on January 10, 2026
LiDAR-Aided NLoS Path Identification for Enhanced Indoor mmWave Communication
Not AvailableThis paper presents a Light Detection and Ranging (LiDAR) based technique for identifying non-line-of-sight (NLoS) communication paths in indoor millimeter-wave (mmWave) environments. This is achieved by using LiDAR distance and backscattered intensity measurements to i) create a map of the communication environment, and ii) identify a set of potential reflective surfaces for NLoS communication. Experimental results demonstrate that the proposed technique, which combines environmental geometry and LiDAR scatter data for ray-tracing, achieves performance comparable to traditional exhaustive search beam training methods, particularly for first-ranked (top- 1) alternative NLoS paths. This offers a promising solution for enhancing indoor mmWave communications in dynamic environments prone to line-of-sight link blockages without the need for a fully dedicated beam training stage.
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- Award ID(s):
- 2243089
- PAR ID:
- 10640655
- Editor(s):
- IEEE
- Publisher / Repository:
- IEEE
- Date Published:
- Edition / Version:
- 1
- Volume:
- 1
- Issue:
- 1
- ISSN:
- 979-8-3315-0805-0
- ISBN:
- 979-8-3315-0805-0
- Page Range / eLocation ID:
- 1 to 4
- Subject(s) / Keyword(s):
- mmWave, indoor, LiDAR, LiDAR point cloud, ray-tracing, non-line-of-sight (NLoS), beam alignment, beam prediction
- Format(s):
- Medium: X Size: 1 Other: 1
- Size(s):
- 1
- Location:
- 979-8-3315-0805-0
- Sponsoring Org:
- National Science Foundation
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