Tootfinder

🇺🇦 Auf radioeins läuft...
Vampire Weekend feat. Danielle Haim:
🎵 Married in a Gold Rush
#NowPlaying #VampireWeekend #DanielleHaim
https://open.spotify.com/track/4Ww4jdVXTyvSnryNTtReRJ

Multiuser Beamformig for Pinching-Antenna Systems: An Element-wise Optimization Framework
Mingjun Sun, Chongjun Ouyang, Shaochuan Wu, Yuanwei Liu
https://arxiv.org/abs/2506.03770 …

Multiuser Beamformig for Pinching-Antenna Systems: An Element-wise Optimization Framework
The pinching-antenna system (PASS) reconstructs wireless channels through pinching beamforming, i.e., optimizing the activated locations of pinching antennas (PAs) along the waveguide. The aim of this article is to investigate the joint design of baseband beamforming and pinching beamforming. A low-complexity element-wise sequential optimization framework is proposed to address the sum-rate maximization problem in PASS-enabled downlink and uplink channels. i) For the downlink scenario, maximum …

Joint Beamforming for NOMA Assisted Pinching Antenna Systems (PASS)
Deqiao Gan, Xiaoxia Xu, Jiakuo Zuo, Xiaohu Ge, Yuanwei Liu
https://arxiv.org/abs/2506.03063

Joint Beamforming for NOMA Assisted Pinching Antenna Systems (PASS)
Pinching antenna system (PASS) configures the positions of pinching antennas (PAs) along dielectric waveguides to change both large-scale fading and small-scale scattering, which is known as pinching beamforming. A novel non-orthogonal multiple access (NOMA) assisted PASS framework is proposed for downlink multi-user multiple-input multiple-output (MIMO) communications. The transmit power minimization problem is formulated to jointly optimize the transmit beamforming, pinching beamforming, and …

This https://arxiv.org/abs/2502.17826 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

Feedback-Free Resource Scheduling for Flexible Multi-BS Cooperation in FD-RAN
Flexible cooperation among base stations (BSs) is critical to improve resource utilization efficiency and meet personalized user demands. However, its practical implementation is hindered by the current radio access network (RAN), which relies on the coupling of uplink and downlink transmissions and channel state information feedback with inherent issues such as overheads and delays. To overcome these limitations, we consider the fully-decoupled RAN (FD-RAN), in which uplink and downlink functi…

Defect states in compressible active polar fluids with turnover
Ludovic Dumoulin, Carles Blanch-Mercader, Karsten Kruse
https://arxiv.org/abs/2506.03795 ht…

Defect states in compressible active polar fluids with turnover
Biological active matter like the cytoskeleton or tissues are characterized by their ability to transform chemical energy into mechanical stress. In addition, it often exhibits orientational order, which is essential for many cellular and morphogenetic processes. Experimental evidence suggests that defects in the orientational order field play an important role in organizing active stress. However, defects tend to annihilate unless the material is in a chaotic state or hydrodynamic interactions…

Parallax QAMA: Novel Downlink Multiple Access for MISO Systems with Simple Receivers
Jie Huang, Ming Zhao, Shengli Zhou, Ling Qiu, Jinkang Zhu
https://arxiv.org/abs/2506.23301

Parallax QAMA: Novel Downlink Multiple Access for MISO Systems with Simple Receivers
In this paper, we propose a novel downlink multiple access system with a multi-antenna transmitter and two single-antenna receivers, inspired by the underlying principles of hierarchical quadrature amplitude modulation (H-QAM) based multiple access (QAMA) and space-division multiple access (SDMA). In the proposed scheme, coded bits from two users are split and assigned to one shared symbol and two private symbols carried by different beams. Based on joint symbol mapping of H-QAM constellations …

🇺🇦 Auf radioeins läuft...
Bon Iver feat. Danielle Haim:
🎵 If Only I Could Wait
#NowPlaying #BonIver #DanielleHaim
https://open.spotify.com/track/06o2hgwnRJN0HYelhyVsLm

Model Splitting Enhanced Communication-Efficient Federated Learning for CSI Feedback
Yanjie Dong, Haijun Zhang, Gaojie Chen, Xiaoyi Fan, Victor C. M. Leung, Xiping Hu
https://arxiv.org/abs/2506.04113

Model Splitting Enhanced Communication-Efficient Federated Learning for CSI Feedback
Recent advancements have introduced federated machine learning-based channel state information (CSI) compression before the user equipments (UEs) upload the downlink CSI to the base transceiver station (BTS). However, most existing algorithms impose a high communication overhead due to frequent parameter exchanges between UEs and BTS. In this work, we propose a model splitting approach with a shared model at the BTS and multiple local models at the UEs to reduce communication overhead. Moreover…

This https://arxiv.org/abs/2312.09720 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_ees…

RIS-Enabled NLoS Near-Field Joint Position and Velocity Estimation under User Mobility
In the context of single-base station (BS) non-line-of-sight (NLoS) single-epoch localization with the aid of a reflective reconfigurable intelligent surface (RIS), this paper introduces a novel three-step algorithm that jointly estimates the position and velocity of a mobile user equipment (UE), while compensating for the Doppler effects observed in near-field (NF) at the RIS elements over the short transmission duration of a sequence of downlink (DL) pilot symbols. First, a low-complexity ini…

Enabling Scalable Distributed Beamforming via Networked LEO Satellites Towards 6G
Yuchen Zhang Seungnyun Kim, Tareq Y. Al-Naffouri
https://arxiv.org/abs/2506.01382

Enabling Scalable Distributed Beamforming via Networked LEO Satellites Towards 6G
In this paper, we propose scalable distributed beamforming schemes over low Earth orbit (LEO) satellite networks that rely solely on statistical channel state information for downlink orthogonal frequency division multiplexing systems. We begin by introducing the system model and presenting a pragmatic yet effective analog beamformer and user-scheduling design. We then derive a closed-form lower bound on the ergodic sum rate, based on the hardening bound, for the digital beamformer design. Next…