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Effects of Multipath and Oversampling on Navigation Using Orthogonal Frequency Division Multiplexed Signals of Opportunity
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Effects of Multipath and Oversampling on Navigation Using Orthogonal Frequency Division Multiplexed Signals of Opportunity

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ISBN-13:
9781288331840
Einband:
Paperback
Seiten:
126
Autor:
Christopher M. Schexnayder
Gewicht:
240 g
Format:
246x189x8 mm
Sprache:
Englisch
Beschreibung:

This research exploits the Orthogonal Frequency Division Multiplexed (OFDM) signal for the purpose of navigation. A transmitter and reference receiver, both at known locations, and a mobile receiver at an unknown location were used to conduct simulations of a transmitted OFDM signal in a Rayleigh-distributed multipath environment. The OFDM signal structure was exploited by using the cyclic pre x in a correlation process to nd the rst symbol boundary in each received signal. Statistical features about each symbol is calculated at both receivers and then correlated to nd the di erence in arrival times. The simulations were run for varying levels of multipath, and also for oversampling in an e ort to gain more accurate results by decreasing the sample period.