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pro vyhledávání: '"Larsson, Erik"'
We consider a cell-free massive multiple-input multiple-output (CFmMIMO) network operating in dynamic time division duplex (DTDD). The switching point between the uplink (UL) and downlink (DL) data transmission phases can be adapted dynamically to th
Externí odkaz:
http://arxiv.org/abs/2406.14126
Autor:
Willhammar, Sara, Iimori, Hiroki, Vieira, Joao, Sundström, Lars, Tufvesson, Fredrik, Larsson, Erik G.
5G systems are being deployed all over the world and one key enabler of these systems is massive multiple-input multiple-output (MIMO). This technology has brought large performance gains in terms of serving many users. Despite the possibility to fur
Externí odkaz:
http://arxiv.org/abs/2406.00142
In federated learning, a server must periodically broadcast a model to the agents. We propose to use multi-resolution coding and modulation (also known as non-uniform modulation) for this purpose. In the simplest instance, broadcast transmission is u
Externí odkaz:
http://arxiv.org/abs/2405.19886
Federated learning (FL) has received significant attention in recent years for its advantages in efficient training of machine learning models across distributed clients without disclosing user-sensitive data. Specifically, in federated edge learning
Externí odkaz:
http://arxiv.org/abs/2405.12046
Autor:
Bai, Jianan, Larsson, Erik G.
The wireless channel is undergoing continuous changes, and the block-fading assumption, despite its popularity in theoretical contexts, never holds true in practical scenarios. This discrepancy is particularly critical for user activity detection in
Externí odkaz:
http://arxiv.org/abs/2405.09425
Autor:
Shaik, Zakir Hussain, Larsson, Erik G.
Out-of-system (OoS) interference is a potential limitation for distributed networks that operate in unlicensed spectrum or in a spectrum sharing scenario. The OoS interference differs from the in-system interference in that OoS signals and their asso
Externí odkaz:
http://arxiv.org/abs/2405.04400
Autor:
Larsson, Erik G., Bai, Jianan
We consider a wireless network with multiple single-antenna repeaters that amplify and instantaneously re-transmit the signals they receive to improve the channel rank and system coverage. Due to the positive feedback formed by inter-repeater interfe
Externí odkaz:
http://arxiv.org/abs/2405.01074
Autor:
Larsson, Erik, Leijonmarck, Elias
Autonomous systems necessitate fast and reliable detection capabilities. The advancement of autonomous driving has intensified the demand for sophisticated obstacle detection algorithms, resulting in the integration of various sensors like LiDAR, rad
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-205710
Publikováno v:
IEEE Wireless Communications Letters, June 2024
We present a reciprocity calibration method for dual-antenna repeaters in wireless networks. The method uses bi-directional measurements between two network nodes, A and B, where for each bi-directional measurement, the repeaters are configured in di
Externí odkaz:
http://arxiv.org/abs/2403.17908
Cell-free massive multiple-input multiple-output (MIMO) is a promising technology for next-generation communication systems. This work proposes a novel partially coherent (PC) transmission framework to cope with the challenge of phase misalignment am
Externí odkaz:
http://arxiv.org/abs/2403.00674