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Real-Time SDR-Based ISM-Multiantenna Receiver for DoA-Applications

Authors:
Janos Buttgereit
Erik Volpert
Horst Hartmann
Dirk Fischer
Götz C. Kappen
Tobias Gemmeke

Keywords: Multiantenna Systems; Wireless Sensor Networks; Spectral Efficiency; Software-defined-radio; IoT

Abstract:
Spectral efficiency is one of the critical issues, which has to be considered during setup of large wireless sensor networks in the Internet of Things (IoT). This paper presents a real-time hardware/software demonstrator based on a flexible Software Defined Radio (SDR) and a low-cost multiantenna-array. The main purpose of this demonstrator is to evaluate cost-benefit parameters (i.e., required processing power, logic resources vs. performance of the multiantenna algorithm) of the overall multiantenna receiver (i.e., antenna, analog and digital signal processing). Therefore, size and power consumption as well as miniaturization of the demonstrator are not considered at this time. To motivate software functions and high-level software architecture, this paper gives a brief theoretical background of multiantenna receivers. A highly adaptable and modular C++-based framework has been developed that realizes all relevant low level and high level signal processing tasks (e.g., ADC-data transfer, online system calibration, Direction of Arrival ((DoA) estimation and interferer suppression), as well as graphical visualization of the spatial spectrum in a multithread-based manner. The multithread-based realization of the demonstrator ensures high performance and a convenient user experience. First measurements of the whole system (i.e., low-cost antenna, C++-based high level and low level signal processing, as well as graphical visualization using a host PC) in a real-world environment proof functional correctness while demonstrating real-time capability of the overall system.

Pages: 5 to 10

Copyright: Copyright (c) IARIA, 2018

Publication date: September 16, 2018

Published in: conference

ISSN: 2308-426X

ISBN: 978-1-61208-664-4

Location: Venice, Italy

Dates: from September 16, 2018 to September 20, 2018