PPT Slide
Sidelobe Issues with Adapted Patterns
If no steps are taken to avoid them, the adapted pattern will tend to have high sidelobes.
1. Optimizing for SINR places no constraint on achieving good sidelobes
2. Although thermal noise is not correlated from channel to channel, in a finite sample it will appear as though it is.
3. The Sample Covariance Matrix contains many “Apparent Interference Sources” which the algorithm will attempt to cancel
“Cancellation“ beam due to noise correlations
Adapted beam with poor sidelobes