Detection of Anomaly Signal by Signal Quality Monitoring Receiver

Shinji Saitoh, Takayuki Yoshihara, Sonosuke Fukushima and Naoki Fujii

Abstract:	Electronic Navigation Research Institute (ENRI) in Japan has been developing and evaluating Ground- Based Augmentation System (GBAS) and Satellite- Based Augmentation System (SBAS). GBAS and SBAS require high accuracy and high integrity information. So, Signal Quality Monitoring (SQM) is necessary for GBAS and SBAS, to meet high accuracy and high integrity. ENRI and Furuno Electric Co., Ltd. (FURUNO) have developed a new GPS receiver with real-time correlation-curve monitoring capability. This is the first prototype of the GPS receiver with SQM (SQM receiver) in Japan. The receiver has 16 channels including 3 SBAS dedicated channels for L1-C/A signal tracking and 2 SQM channels. Each SQM channel has 127 correlation points distributed evenly at 0.025575 chip step. The width of the correlation monitoring range is about 3.2 chips. It can be allocated at any part of 1023 chip width by user selection. Each correlation point outputs both In-phase and Quadrature at 5 Hz. We acquired data in two different environments by the SQM receiver. One is pure signal environment using a parabolic antenna, the other is strong multipath environment. Moreover we carried out hardware simulation to check to detection capability of the SQM receiver using anomaly GPS pseudo signals, such as ICAO’s three threat models, generated by an arbitrary waveform generator and a vector signal generator. This paper describes the specification of our SQM receiver, and details of data collected by the SQM receiver in some environments and results of hardware simulation to check for detection capability of the SQM receiver.
Published in:	Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004) September 21 - 24, 2004 Long Beach Convention Center Long Beach, CA
Pages:	2331 - 2336
Cite this article:	Saitoh, Shinji, Yoshihara, Takayuki, Fukushima, Sonosuke, Fujii, Naoki, "Detection of Anomaly Signal by Signal Quality Monitoring Receiver," Proceedings of the 17th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2004), Long Beach, CA, September 2004, pp. 2331-2336.
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