STEADY-STATE AND TRANSIENT PERFORMANCE OF THE SIDELOBE CANCELLER
Abstract
The purpose of this study was to determine the factors and trade-offs that limit the speed of response (lock-on rate) of the Sidelobe Canceller. The Sidelobe Canceller consists of a correlator, (multiplier and integrator), within a closed loop circuit. The lock-on rate is essentially determined by the bandwidth of the integrating circuit, the loop gain, and the bandwidth of the input jammer waveform. The performance of the Sidelobe Canceller, both transient and steady-state can be related to two parameters, the loop gain and the ratio of the enhanced loop bandwidth to the jammer bandwidth, B sub J. The enhanced loop bandwidth, B sub E, is defined as (1 + loop gain) times the bandwidth of the integrating circuit. The lock-on rate can be increased by increasing loop gain and/or the enhanced bandwidth. The loop gain is limited by stability requirements to 30-40 db. The enhanced bandwidth can't be increased much beyond the point where the ratio B sub E/B sub J exceeds unity without hurting the steady-state performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 08, 1966
- Accession Number
- AD0373326
Entities
People
- S. P. Applebaum
Organizations
- SRC Inc.