Abstract
We compare the technique of using the orbital angular momentum (OAM) of radio waves for generating multiple channels in a radio communication scenario with traditional multiple-in-multiple-out (MIMO) communication methods. We demonstrate that, for certain array configurations in free space, traditional MIMO theory leads to eigen-modes identical to the OAM states. From this we conclude that communicating over the sub-channels given by OAM states is a subset of the solutions offered by MIMO, and therefore does not offer any additional gains in capacity.
| Original language | English |
|---|---|
| Pages (from-to) | 1126-1131 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 60 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2012 |
Subject classification (UKÄ)
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- Antenna arrays
- antenna radiation patterns
- channel capacity
- free-space propagation
- MIMO
- orbital angular momentum
- radio communication.