C4.1 - Low-Cost Spectrum Analyzer for Cognitive Radio Applications and Coexistence Management in the 2.4 GHz ISM-Band
- Event
- AMA Conferences 2013
2013-05-14 - 2013-05-16
Nürnberg - Band
- Proceedings SENSOR 2013
- Chapter
- C4 - Wireless Sensors II
- Author(s)
- R. Hornung, R. Heynicke, G. Scholl - Helmut Schmidt University / University of the Federal Armed Forces, Hamburg (Germany)
- Pages
- 396 - 398
- DOI
- 10.5162/sensor2013/C4.1
- ISBN
- 978-3-9813484-3-9
- Price
- free
Abstract
Interferences between wireless systems have to be avoided, if multiple wireless systems shall operate simultaneously and in a reliable way in the 2.4 GHz ISM-band. This can be achieved, e.g. by intelligent cognitive radio systems or frequency planning strategies. A cognitive radio or an efficient coexistence management scheme requires a spectrum analyzer. In this article, a fast and low-cost spectrum analyzer will be introduced, which is based on a wireless gateway for sensor/actor communication with standard narrowband RF-transceivers. The spectrum analyzer scans the complete ISM-band in 1 MHz steps within only 1.2 ms. An FPGA is employed for parallel preprocessing of the RF-transceivers. A microcontroller is used for a detailed RSSI-signal analysis and classification. Different radio standards such as IEEE 802.11b/g/n (Wi-Fi) and narrowband systems like IEEE 802.15.4, ZigBee or IEEE 802.15.1 (Bluetooth) can be recognized. Additionally Bluetooth in paging procedure with a packet duration of only 68 μs can be detected. The spectrum analyzer can be used as standalone system, e.g. for spectrum monitoring in industrial environments, or can be easily integrated into cognitive radio systems.