Reference Loop Phase Shift in an N-Element Adaptive Array
- 1 July 1979
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Aerospace and Electronic Systems
- Vol. AES-15 (4) , 576-582
- https://doi.org/10.1109/TAES.1979.308747
Abstract
Adaptive arrays based on the LMS algorithm require the generation of a reference signal which is usually derived from the array output. A particular problem associated with this technique is that of a phase shift in the reference signal loop. The effects of this phase shift on the performance of an N-element adaptive array are discussed. It is shown that a reference loop phase shift causes the array weights to cycle, thereby frequency translating the signals at the output. The weight-cycling frequency is related to various system parameters of an N-element array. In particular, it is observed that the cycling frequency increases as the number of antennas (N) increases.Keywords
This publication has 4 references indexed in Scilit:
- Reference Loop Phase Shift in Adaptive ArraysIEEE Transactions on Aerospace and Electronic Systems, 1978
- An adaptive array in a spread-spectrum communication systemProceedings of the IEEE, 1978
- Weight Jitter Phenomena in Adaptive Array Control LoopsIEEE Transactions on Aerospace and Electronic Systems, 1977
- The complex LMS algorithmProceedings of the IEEE, 1975