Antenna selection refers to the process of choosing one or more antennas from an available set at the transmitter or receiver to optimize wireless communication performance, based on channel quality metrics derived from CSI measurements. In the context of WiFi/CSI sensing, it matters because selecting the antenna with the most favorable channel conditions — such as higher SNR or more stable multipath characteristics — directly improves packet delivery prediction accuracy and link reliability on commodity hardware. Key variants include receive antenna selection, where the best antenna is chosen at the receiver based on per-antenna CSI, and diversity-based selection schemes that combine information across multiple antennas to mitigate fading effects.
Source Papers
- A Novel Device-Free Counting Method Based on Channel Status Information ↗ — A Novel Device-Free Counting Method Based on Channel Status
- Enabling ISAC on Low-Cost Devices via Spatial-Channel Estimation With a Single-RF Chain ↗ — Enabling ISAC on Low-Cost Devices via Spatial-Channel Estima
- Predictable 802.11 packet delivery from wireless channel measurements ↗ — Predictable 802.11 packet delivery from wireless channel mea