Results 51 to 60 of about 3,462 (189)

A Transformed Coprime Array With Reduced Mutual Coupling for DOA Estimation of Non-Circular Signals

IEEE Access, 2021
Recently, the design of sparse linear array for direction of arrival (DOA) estimation of non-circular (NC) signals has attracted great attention because the difference and sum co-array offered by non-circularity increases the aperture of virtual linear ...
Fengtong Mei, Haiyun Xu, Weijia Cui, Bin Ba, Yinsheng Wang   +4 more
doaj   +1 more source

Research on Three‐Dimensional Autonomous Obstacle Avoidance Path Planning Methods for UAVs

Transactions on Emerging Telecommunications Technologies, Volume 37, Issue 2, February 2026.
This study presents a three‐dimensional autonomous obstacle‐avoidance path planning method for unmanned aerial vehicles (UAVs) based on a deep reinforcement learning (DRL)‐enhanced Mayfly Algorithm. The traditional Mayfly Algorithm suffers from issues such as random initial population generation and slow convergence.
Chong Wu, Hao Cheng, Hua Wang
wiley   +1 more source

Interpolation-Based Direction-of-Arrival Estimation for Coprime Arrays via Covariance Matrix Fitting

IEEE Access, 2020
Coprime arrays can highly increase degree-of-freedom (DOF) by exploiting the equivalent virtual signal. However, since the corresponding virtual array constructed by the coprime array is always a non-uniform linear array (non-ULA), most existing ...
Zhen Chen, Chongyi Fan, Xiaotao Huang
doaj   +1 more source

Spatial‐Frequency Estimation for OFDM System with Coprime Array

Wireless Communications and Mobile Computing, 2021
Orthogonal frequency division multiplexing (OFDM) is the key technique of the communication system. In this paper, coprime array is designed in OFDM system to obtain joint direction of arrival (DOA) and carrier frequency offset (CFO) estimates. The proposed system can achieve beamforming and adaptive signal processing, reduce the multipath fading, and ...
Gang Shao, Wen-qin Wu, Lei Yin, Chen-yang Ding, Xiao-yuan Zhang   +4 more
openaire   +1 more source

Random Lie bracket on sl2(Fp)

Random Structures &Algorithms, Volume 68, Issue 1, January 2026.
ABSTRACT We study a random walk on the Lie algebra sl2(Fp)$$ {\mathfrak{sl}}_2\left({\mathbf{F}}_p\right) $$ where new elements are produced by randomly applying adjoint operators of two generators. Focusing on the generic case where the generators are selected at random, we analyze the limiting distribution of the random walk and the speed at which it
Urban Jezernik, Matevž Miščič
wiley   +1 more source

Lyapunov exponents and anomalous diffusion of a Lorentz gas with infinite horizon using approximate zeta functions

, 1995
We compute the Lyapunov exponent, generalized Lyapunov exponents and the diffusion constant for a Lorentz gas on a square lattice, thus having infinite horizon.
B. Friedman, C. Beck, D. Ruelle, D. Ruelle, H. Beijeren van, H. H. Rugh, J. H. Hannay, J.-P. Bouchaud, L. M. Abramov, L. Warnemyr, M. Abramovitz, M. Pollicott, M. V. Berry, N. I. Chernov, P. Cvitanović, P. Cvitanović, P. Cvitanović, P. Cvitanović, P. Dahlqvist, P. Dahlqvist, P. Dahlqvist, P. L. Garrido, P. M. Bleher, Per Dahlqvist, R. Artuso, V. Baladi, Y. G. Sinai   +26 more
core   +1 more source

Decentralised and Centralised Fixed Structure H∞ Robust Loop Shaping for the MIMO Microsurgical Manipulation Based on PSOGSA

IET Control Theory &Applications, Volume 20, Issue 1, January/December 2026.
This paper presents a robust H∞ decentralised and centralised control approach for a microsurgical manipulator using Particle Swarm Optimisation and Gravitational Search Algorithm (PSOGSA). The proposed fixed‐structure Proportional‐Integral‐Derivative (PID)‐based controllers address implementation challenges of conventional high‐order H∞ controllers ...
Somyot Kaitwanidvilai, Poom Konghuayrob, Hisayuki Aoyama   +2 more
wiley   +1 more source

Low-Complexity Propagator Based Two Dimensional Angle Estimation for Coprime MIMO Radar

IEEE Access, 2018
The problem of 2-D angle estimation for coprime multiple-input multiple-output (MIMO) radar is considered, and a low-complexity propagator based method is proposed.
Jianfeng Li, Defu Jiang
doaj   +1 more source

The Search for Maximal Values of min(A,B,C) / gcd(A,B,C) for A^x + B^y = C^z [PDF]

, 2010
This paper answers a question asked by Ed Pegg Jr. in 2001: "What is the maximal value of min(A,B,C)/ gcd(A,B,C) for A^x + B^y = C^z with A,B,C >= 1; x,y,z >= 3?" Equations of this form are analyzed, showing how they map to exponential Diophantine ...
Townsend, Arthur R.
core  

Refined limit multiplicity for varying conductor

, 2016
Recent results by Abert, Bergeron, Biringer et al., Finis, Lapid and Mueller, and Shin and Templier have extended the limit multiplicity property to quite general classes of groups and sequences of level subgroups.
Binder, John
core   +1 more source