A Computationally Efficient Direct Position Determination Algorithm Based on OFDM System

Based on the orthogonal frequency division multiplexing (OFDM) system, a computationally attractive implementation for the traditional single source maximum likelihood (SML) direct position determination (DPD) algorithm is proposed. The proposed algorithm implements fast Fourier transform (FFT) to t...

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Bibliographic Details
Published in:IEEE communications letters 2023-03, Vol.27 (3), p.841-845
Main Authors: Wang, Ziqiang, Hao, Kegang, Sun, Yimao, Xie, Lei, Wan, Qun
Format: Article
Language:English
Subjects:
Algorithms
Computational efficiency
Cost function
direct position determination
Eigenvalues and eigenfunctions
fast Fourier transform
Fast Fourier transformations
Location awareness
Maximum likelihood estimation
OFDM
Orthogonal Frequency Division Multiplexing
Time delay
Transmission line matrix methods
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Summary:Based on the orthogonal frequency division multiplexing (OFDM) system, a computationally attractive implementation for the traditional single source maximum likelihood (SML) direct position determination (DPD) algorithm is proposed. The proposed algorithm implements fast Fourier transform (FFT) to the received frequency-domain signals after deconvolution. Then, the cost function for all points can be obtained from the same FFT output set. As a consequence, some repeated calculation in the traditional SML DPD algorithm is avoided. Simulation results demonstrate that the proposed modified SML DPD algorithm can achieve a comparable performance to traditional SML-DPD while significantly reducing the computational complexity.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2022.3231548