Direct position determination of OFDM signals

Direct Position Determination (DPD) has recently been proposed [1] as a high-accuracy technique for emitter localization. It has been shown that DPD outperforms traditional emitter localization methods such as Angle-Of-Arrival (AOA) and Time-Of-Arrival (TOA) as it solves the localization problem usi...

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Bibliographic Details
Main Authors: Bar-Shalom, O., Weiss, A.J.
Format: Conference Proceeding
Language:English
Subjects:
Antenna arrays
array processing
Base stations
Digital video broadcasting
emitter localization
Frequency domain analysis
Frequency estimation
maximum likelihood
Maximum likelihood estimation
Narrowband
OFDM
OFDM modulation
Transmitters
Wireless LAN
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Summary:Direct Position Determination (DPD) has recently been proposed [1] as a high-accuracy technique for emitter localization. It has been shown that DPD outperforms traditional emitter localization methods such as Angle-Of-Arrival (AOA) and Time-Of-Arrival (TOA) as it solves the localization problem using the data collected at all sensors at all base stations together, as opposed to the traditional AOA/TOA approach that is composed of two separate steps: 1) AOA/TOA independent estimates and 2) triangulation based on the results of the first step (see e.g., [2]). The signal model in [1] assumed a narrow-band Gaussian source with a rather simple flat-fading channel model. Here we extend the DPD algorithm to OFDM signals that propagate through a frequency-selective channel and derive the Maximum Likelihood Estimator (MLE) for the problem.
ISSN:1948-3244
1948-3252
DOI:10.1109/SPAWC.2007.4401287