Zobrazeno 1 - 10
of 206
pro vyhledávání: '"Ashikhmin, Alexei"'
We address the design and optimization of real-world-suitable hybrid precoders for multi-user wideband sub-terahertz (sub-THz) communications. We note that the conventional fully connected true-time delay (TTD)-based architecture is impractical becau
Externí odkaz:
http://arxiv.org/abs/2406.11220
In this paper, we investigate the transversality of pairs of CSS codes and their use in the second generation of quantum repeaters (QR)s. We show that different stations of quantum link can experience different errors. Considering this fact, we sugge
Externí odkaz:
http://arxiv.org/abs/2406.00350
Autor:
Essiambre, René-Jean, Guo, Cheng, Dacha, Sai Kanth, Ashikhmin, Alexei, Blanco-Redondo, Andrea, Kschischang, Frank R., Banaszek, Konrad, Weiner, Matthew, Kopf, Rose, Crawley, Ian, Idjadi, Mohamad H., Sayem, Ayed A., Zhao, Jie, Sandoz, James D., Fontaine, Nicolas, Menkart, Nicole, Ryf, Roland, Cloonan, John, Vasilyev, Michael, Murphy, Thomas E., Burrows, Ellsworth C.
We experimentally demonstrate optical detection at 12.5~bits per incident photon, 9.4~dB higher than the theoretical limit of conventional coherent detection. A single laser transmits both data and optical clock, undergoes 77~dB of attenuation before
Externí odkaz:
http://arxiv.org/abs/2310.02191
A key constraint that limits the implementation of blockchain in Internet of Things (IoT) is its large storage requirement resulting from the fact that each blockchain node has to store the entire blockchain. This increases the burden on blockchain n
Externí odkaz:
http://arxiv.org/abs/2305.03895
This paper investigates Cell-Free massive MIMO networks, where each access point (AP) is equipped with a hybrid transceiver, reducing the complexity and cost compared to a fully digital transceiver. Asymptotic approximations for the spectral efficien
Externí odkaz:
http://arxiv.org/abs/2210.05055
Cell-Free Massive Multiple-input Multiple-output (mMIMO) consists of many access points (APs) in a coverage area that jointly serve the users. These systems can significantly reduce the interference among the users compared to conventional MIMO netwo
Externí odkaz:
http://arxiv.org/abs/2111.07463
We investigate the activity detection and channel estimation issues for cell-free Internet of Things (IoT) networks with massive random access. In each time slot, only partial devices are active and communicate with neighboring access points (APs) us
Externí odkaz:
http://arxiv.org/abs/2109.13450
Autor:
Shahsavari, Shahram, Nosrati, Mehrdad, Hassanzadeh, Parisa, Ashikhmin, Alexei, Marzetta, Thomas L., Erkip, Elza
Non-cooperative cellular massive MIMO, combined with power control, is known to lead to significant improvements in per-user throughput compared with conventional LTE technology. In this paper, we investigate further refinements to massive MIMO, firs
Externí odkaz:
http://arxiv.org/abs/2104.10805
We investigate the feasibility of using Massive MIMO to support URLLC in both coherence interval based and 3GPP compliant pilot settings. We consider grant-free uplink transmission with MMSE receiver and adopt 3GPP channel models. In the coherence in
Externí odkaz:
http://arxiv.org/abs/2102.09156
Because of their capacity-approaching performance, graph-based codes have a wide range of applications, including communications and storage. In these codes, unequal error protection (UEP) can offer performance gains with limited rate loss. Recent em
Externí odkaz:
http://arxiv.org/abs/2101.09238