An Intra-Volume Ad Hoc Array Concept for Improved Public-Safety Communications
Christopher L. Holloway
Here we report on the testing and measurements of an intra-volume ad hoc array concept suitable for public-safety communications in buildings. The overall concept is to use randomly located (or arbitrarily placed) wireless devices in a coordinated manner in order to increase the radio-frequency signal level at otherwise unreachable locations. A typical ad hoc network is limited to a coverage area achieved by the useable coverage of single nodes. We seek to extend the radio-frequency coverage by using two or more nodes as elements of an ad hoc phased array. The measurements results presented here, collected in real-world environments, along with simulations, based on real-world data, demonstrate that the ad hoc array technique can provide useful gain, up to 10 dB with only four elements. Both the measurements also indicate a typical gain of 2 dB to 6 dB using only two elements. Analysis of the phase indicates a phase alignment of ± 45° achieves within 1 dB of the maximum.
An Intra-Volume Ad Hoc Array Concept for Improved Public-Safety Communications, IEEE Transactions on Wireless Communications, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905779
(Accessed December 6, 2023)