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      Signal Existence Verification (SEV) for GPS Low Received Power Signal Detection Using the Time-Frequency Approach

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          Abstract

          The detection of low received power of global positioning system (GPS) signals in the signal acquisition process is an important issue for GPS applications. Improving the miss-detection problem of low received power signal is crucial, especially for urban or indoor environments. This paper proposes a signal existence verification (SEV) process to detect and subsequently verify low received power GPS signals. The SEV process is based on the time-frequency representation of GPS signal, and it can capture the characteristic of GPS signal in the time-frequency plane to enhance the GPS signal acquisition performance. Several simulations and experiments are conducted to show the effectiveness of the proposed method for low received power signal detection. The contribution of this work is that the SEV process is an additional scheme to assist the GPS signal acquisition process in low received power signal detection, without changing the original signal acquisition or tracking algorithms.

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          Most cited references41

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          GPS receiver architectures and measurements

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            TIME–FREQUENCY ANALYSIS OF A SUSPENSION BRIDGE BASED ON GPS

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              Time-Frequency Excision for GNSS Applications

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                Author and article information

                Journal
                Sensors (Basel)
                Sensors (Basel, Switzerland)
                Molecular Diversity Preservation International (MDPI)
                1424-8220
                2010
                10 May 2010
                : 10
                : 5
                : 4717-4738
                Affiliations
                Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 70101, Taiwan; E-Mail: p4896108@ 123456ccmail.ncku.edu.tw
                Author notes
                [* ] Author to whom correspondence should be addressed; E-Mail: ssjan@ 123456mail.ncku.edu.tw ; Tel.: +886-6-275-7575 ext. 63629; Fax: +886-6-238-9940.
                Article
                sensors-10-04717
                10.3390/s100504717
                3292143
                22399903
                26ac7e90-5621-4eca-95f4-bf4ad8d042f2
                © 2010 by the authors; licensee MDPI, Basel, Switzerland.

                This article is an Open Access article distributed under the terms and conditions of the Creative Commons Attribution license ( http://creativecommons.org/licenses/by/3.0/).

                History
                : 29 March 2010
                : 30 April 2010
                : 4 May 2010
                Categories
                Article

                Biomedical engineering
                low received power signal processing,gps signal acquisition,time-frequency analysis

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