Closely Spaced Paths Effect Mitigation for Indoor Location Systems

Author

Szumny, Rafal ; Kurek, Krzysztof ; Yashchyshyn, Yevhen ; Modelski, Jozef

Author_Institution

Warsaw Univ. of Technol., Warsaw

fYear

2006

Firstpage

537

Lastpage

540

Abstract

Paper presents a proposal of method for closely spaced paths mitigation for indoor location system based on spread spectrum signals. At the beginning issue of closely spaced paths influence for the accuracy of TO A determination is explained. In the following part results of indoor propagation simulations are presented. These simulations show relationship between delays and directions of arrival of power delay profile components. The proposal of simple four-element null steering antenna array, which can mitigate this effect, is proposed. The paper contains also results of measurements showing influence of multipath propagation to coarse code synchronization.

Keywords

antenna arrays; direction-of-arrival estimation; indoor radio; spread spectrum communication; time-of-arrival estimation; closely spaced paths mitigation; directions of arrival; four-element null steering antenna array; indoor location systems; indoor propagation simulations; multipath propagation; power delay profile components; radio wave time of arrival; spread spectrum signals; Antenna arrays; Antenna measurements; Antennas and propagation; Bandwidth; Delay effects; Multiple signal classification; Propagation delay; Proposals; Spaceborne radar; Spread spectrum radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwaves, Radar & Wireless Communications, 2006. MIKON 2006. International Conference on

Conference_Location

Krakow

Print_ISBN

978-83-906662-7-3

Type

conf

DOI

10.1109/MIKON.2006.4345236

Filename

4345236