A multiple sidelobe canceler using tapped delay line with Gram-Schmidt processing
✍ Scribed by Kazufumi Hirata; Takashi Hotta; Takashi Kawai; Seiji Mano; Shin-ichi Betsudan
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 729 KB
- Volume
- 82
- Category
- Article
- ISSN
- 8756-6621
No coin nor oath required. For personal study only.
✦ Synopsis
In a multiple sidelobe canceler (MSLC) designed to suppress several interference waves incident on the radar, the number of auxiliary antennas equal to or greater than the number of interference waves is needed. On the other hand, in the TDL (Tapped Delay Line)-MSLC using delay lines, only one auxiliary antenna is needed, and hence this system is economical, with the further advantage that the convergence time for the adaptive weights does not depend on the directions of incidence of the interference waves. In this paper, for the case where two interference waves are incident on a TDL-MSLC with one delay line, the relation between the convergence time of the adaptive weights and the product of the time delay in the delay line and the frequency difference of two interference waves is investigated. Furthermore, a TDL-MSLC using Gram-Schmidt processing is proposed. It is confirmed by simulations and hardware experiments that this configuration can reduce the effect of the frequency difference of the two interference waves on the convergence time of the adaptive weights, so that the convergence of the adaptive weights can be made faster.