On signal distortion in compact UWB arrays due to element interaction

Ultra-wideband (UWB) technology offers significant advantages in high resolution ranging due to the superior time-of-arrival (TOA) resolution. In order to allow direction-of-arrival (DOA) estimation from simultaneous TOA measurements multiple UWB antennas are required. This paper deals with systems...

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Bibliographic Details
Main Authors: Kotyrba, G., Chaloupka, H.J.
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Bandwidth
Direction of arrival estimation
Directive antennas
Distortion measurement
Frequency
Signal resolution
Transfer functions
Ultra wideband antennas
Ultra wideband technology
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Summary:Ultra-wideband (UWB) technology offers significant advantages in high resolution ranging due to the superior time-of-arrival (TOA) resolution. In order to allow direction-of-arrival (DOA) estimation from simultaneous TOA measurements multiple UWB antennas are required. This paper deals with systems characterized by a frequency bandwidth exceeding the center frequency (e.g. 3.1 to 10.6 GHz). Furthermore, it is focused on the special case where due to a restricted platform size the antenna spacing cannot be chosen large enough in order to avoid severe distortion in the angular dependence of the complex-valued transfer function caused by mutual interaction between the antenna elements. In this paper the impact of this signal distortion on the ranging accuracy is discussed. Furthermore, a novel approach for a first-order compensation of this drawback is presented.
ISSN:1522-3965
1947-1491
DOI:10.1109/APS.2005.1551394