Performance of Band-Partitioned Canceller for a Wideband Radar
Abstract
The performance of band-partitioned (BP) interference cancellation is investigated for a wideband (WB) radar. This report describes trade-off studies carried out on the BP cancellers and identifies the techniques and parameters that are capable of improving cancellation performance as the radar bandwidth increases. It is found that the combined use of a proper number of subbands, subband filter weightings, data overlap, and sufficient degrees of freedom of the canceller system provide an excellent balance between processing complexity and performance for a WB BP canceller system. The effects of errors among various channels on adaptive cancellation resulting from filter mismatch and time difference due to multipath are evaluated. It is shown that performance degradation caused by filter mismatch errors can be compensated by increasing the number of subbands and the canceller degrees of freedom. The cancellation performance of a hybrid BP canceller consisting of band-partitioning and transversal filtering is also examined. The hybrid configuration with appropriately chosen time delays is found to be particularly effective in the presence of multipath, but at the expense of increasing system and processing complexity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 29, 2004
- Accession Number
- ADA447368
Entities
People
- Feng-ling C. Lin
- Karl R. Gerlach
Organizations
- United States Naval Research Laboratory