Adaptive Power Inversion Antenna Arrays

Abstract

In the past, theoretical and experimental investigations on adaptive antenna arrays have mostly been based on algorithms employing the gradient techniques. These techniques call for highly-stable multiple feedback loops with low noise performance. However, a new approach to solving adaptive antenna problems which employs the pseudogradient approximation techniques, wherein a direct computation of the gradient is not required, may sometimes be more useful. Presented in this paper are application of two types of the pseudogradient algorithms, namely, the random search with paired trials and the stochastic-m-gradient, to power inversion adaptive antenna arrays. These arrays achieve inversion of the power ratio of the desired signal and the interference signal without a detailed knowledge.of the desired signal structure and the arrival angle. The method is illustrated by a computer simulation.

Indexing Terms:

• Adaptive Arrays
• Power Inversion

Additional information

Notes on contributors

T.G. Palanivelu

Palanivelu, T G: After obtaining ME degree from the Madras University, he joined Govt. College of Technology, Coimbatore as Associate Lecturer in Electronics and Communication in 1973. In the end of the same year, he joined Regional Engineering College, Tiruchy as Lecturer in Electronics and Communication.

In 1978, he was deputed to the Indian Institute of Science to do PhD under quality improvement programme. He submitted his thesis on Adaptive Antenna Arrays in June 1981. He is presently working in this field apart from his teaching.