Cellular systems are still not enjoying the high capacity and coverage gains that were indicated by advances in communication theory including multiple antennas, better modulation, and near-Shannon error control codes.
The reason is that many of these advances neglect conditions found at the cell edge: high path loss, shadowing, and significant interference.
WHAT IS THE IMPACT OF INTERFERENCE ON CAPACITY?
- Not easy to quantify.
- Depending on many parameters and implementation.
This graph (from R&S) is a simplified real-world example for 2x2MIMO and HARQ.
The MCS-SINR relation depends on the specific Base Station vendors’ algorithms, performance, and scheduler implementation, as well as on the channel fading profile, etc.
Interference dramatically impacts network performance and capacity.
- MCS: Modulation and Coding scheme.
- SINR: Signal to Interference and Noise Ratio.