Proceedings Article10.1145/3573428.3573751
A low-complexity time delay estimation algorithm based on spectral factorization in OFDM system
Jiacan Su,Ming Li,Yan-Li Hou +2 more
- 21 Oct 2022
TL;DR: In this paper , a root-MUSIC algorithm based on spectral factorization is proposed to reduce the computational complexity of the root polynomial by half, while maintaining the same precision and more suitable for real-time computing.
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Abstract: When the Root-MUSIC algorithm (Root-Multiple Signal Classification) is used to estimate time delay in the Orthogonal Frequency Division Multiplexing (OFDM) system, there exists computational redundancy because of the required roots being conjugating symmetry. Aiming at this problem, a Root-MUSIC algorithm based on spectral factorization—SF-Root-MUSIC algorithm is proposed. Based on the structural characteristics of Laurent polynomials, the proposed algorithm uses spectral factorization to reduce the order for the root polynomial by half thus reducing the computational complexity. The simulation results show that the proposed algorithm has lower computational complexity while maintaining the same precision, and is more suitable for real-time computing.
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References
IEEE Geoscience and Remote Sensing Letters
Abstract: —A new technique is proposed for multi-sensor image registration by matching the features using Discrete Particle Swarm Optimization (DPSO). The feature points are first extracted from the reference and sensed image using improved Harris corner detector available in the literature. From the extracted corner points, DPSO finds the three corresponding points in the sensed and reference image using multi-objective optimization of distance and angle conditions through objective switching technique. By this, the global best matched points are obtained which are used to evaluate the affine transformation for the sensed image. The performance of the image registration is evaluated and concluded that the proposed approach is efficient.
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Time-Delay Estimation for Ground Penetrating Radar Using ESPRIT With Improved Spatial Smoothing Technique
TL;DR: An in-depth analysis of the essential preprocessing steps for the application of ESPRIT to practical GPR measurement data is given, and an improved spatial smoothing method is adopted to construct the correlation matrix for the robustness of the time-delay estimation result.
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High-resolution time of arrival estimation for OFDM-based transceivers
TL;DR: A novel algorithm for time of arrival (TOA) estimation for OFDM-based transceivers is presented, which was applied to the long training sequence (LTS) symbol of the IEEE wireless local area network (WLAN) 802.11 g preamble.
A Novel Positioning-Communication Integrated Signal in Wireless Communication Systems
TL;DR: A novel positioning-communication integrated signal is proposed, which superposes the configurable positioning signal on the communication one to achieve a sub-meter range measurement accuracy.
Super-resolution time delay estimation for narrowband signal
TL;DR: In this article, a diagonal loading least squares MUSIC (DL-LS-MUSIC) is proposed to solve the problem and the correlation matrix is reconstructed by the channel response which is estimated by DL-LS.
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