A Gain Optimizing Algorithm for Adaptive Arrays.
Abstract
This report discusses an adaptive algorithm for optimizing the gain of an antenna array on an incoming signal. The algorithm is based on a steepest-ascent maximization of the array output power, subject to a constraint on the array weights. This algorithm is under investigation for use in conjunction with a power inversion adaptive array, a modified version of the LMS adaptive array. A power inversion adaptive array can provide significant protection from interference in a spread spectrum communication system, but it does not provide any form of beam tracking on the desired signal. Beam tracking can be obtained, however, by first arraying antenna elements in pairs with power inversion feedback, and then combining the element-pair outputs with the gain optimizing algorithm described here. This report discusses only the gain optimizing algorithm. An algorithm for optimizing the gain of an adaptive antenna system is discussed in this report. The gain optimization is accomplished by a constrained gradient-search technique. The algorithm is presented and some simple examples showing how the gain is optimized in a two-element array are given. The convergence and stability of the algorithm are also discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA124439
Entities
People
- H. H. Al-khatib
- R. T. Compton Jr.
Organizations
- Ohio State University