Robust Adaptive Array Signal Processing with Multiple-Beam Constraints
Date Issued
2004
Date
2004
Author(s)
Wang, Chih-Chang
DOI
zh-TW
Abstract
Abstract
We can receive a signal from a specific DOA (direction of arrival) or receive more than one signal from different DOAs by using adaptive antenna array, and we can suppress noise and interference. However, the adaptive antenna array may suffer from many non-ideal effects, for example: array element position perturbations and signal direction angle error, these kinds of non-ideal effects will deteriorate the performance of adaptive antenna array. In this thesis, we focus on correcting these two non-ideal effects using one-dimensional antenna array structure and two-dimensional antenna array structure.
We use four methods to correct the non-ideal effects in this thesis. Three of them were developed from our laboratory, the first one is DITAM discussed in [14], the second is Method discussed in [19], and the third one is Improved Method that will be discussed in this thesis. The last method is Diagonal Loading which has been discussed in many papers[16-17，25-27] in recent years.
We use DITAM, Method, and Diagonal Loading to solve the array elements position perturbation problem in chapter 3 and chapter 4. Better robustibility has been shown in Method. In chapter 5, we use Method, Diagonal Loading, and Improved Method to solve the signal direction angle error problem. According to the experiments, Improved Method has the best robustibility.
Subjects
多重波束
可適性
強健式
陣列信號處理
Multiple-Beam Constraints
Robust
Array Signal Processing
Adaptive
Type
thesis
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