Abstract
In a previously proposed design method for frequency invariant beamforming, the design for the case of an off-broadside main beam is not satisfactory. After a detailed analysis, we propose two methods to overcome this problem: one is to increase the length of the FIR filter attached to each sensor, as a result, we need to sample the transformed desired response more densely in the associated direction; the other one is to design a broadside main beam first, then it is convolved with appropriate steering delay filters. Design examples show that the two methods can provide satisfactory results.
| Original language | English |
|---|---|
| Title of host publication | International ITG Workshop on Smart Antennas, 2008 |
| Publisher | IEEE |
| Pages | 190-194 |
| Number of pages | 4 |
| ISBN (Print) | 978-1-4244-1756-8 |
| DOIs | |
| Publication status | Published - Feb 2008 |
Keywords
- fourier transforms
- antenna arrays
- broadband antennas
- frequency invariant beamformers
- off-broadside main beam design
- steering delay filters
- broadband arrays