Design and implementation of a rectangular frequency invariant beamformer with a full azimuth angle coverage

被引：10
|
作者：
Liu, Wei [1 ]
机构：
[1] Univ Sheffield, Dept Elect & Elect Engn, Commun Res Grp, Sheffield S1 3JD, S Yorkshire, England
来源：
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS | 2011年 / 348卷 / 09期
关键词：
BAND; ARRAYS;
D O I：
10.1016/j.jfranklin.2011.07.016
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A novel design of the frequency invariant beamformer based on a rectangular array is proposed with two unique features: there are no taped delay-lines (TDLs) or any other temporal processing involved and the resultant beamformer has a full 360 degrees azimuth angle coverage. This leads to a wideband beamformer with complex-valued coefficients and its implementation is not as straightforward as the traditional ones. Depending on whether the input signal is complex-valued or real-valued, special arrangements and structures are required for its effective implementation. Several design examples are provided with a satisfactory frequency invariant property. Two sets of implementation results are given based on both simulations and data collected by a planar microphone array system. (C) 2011 The Franklin Institute. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：2556 / 2569
页数：14
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