Search Results - "Ashikhmin, Alexei"

Approaching MIMO capacity using bitwise Markov Chain Monte Carlo detection by Rong-Rong Chen, Ronghui Peng, Ashikhmin, A., Farhang-Boroujeny, B.

“…This paper examines near capacity performance of Markov Chain Monte Carlo (MCMC) detectors for multiple-input and multiple-output (MIMO) channels. The proposed…”
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Cell-Free Massive MIMO Versus Small Cells by Ngo, Hien Quoc, Ashikhmin, Alexei, Yang, Hong, Larsson, Erik G., Marzetta, Thomas L.

“…A Cell-Free Massive MIMO (multiple-input multiple-output) system comprises a very large number of distributed access points (APs), which simultaneously serve a…”
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Interference Reduction in Multi-Cell Massive MIMO Systems With Large-Scale Fading Precoding by Ashikhmin, Alexei, Li, Liangbin, Marzetta, Thomas L.

“…A wireless massive multiple-input multiple-output (MIMO) system entails a large number of base station antennas serving a much smaller number of users, with…”
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Precoding and Power Optimization in Cell-Free Massive MIMO Systems by Nayebi, Elina, Ashikhmin, Alexei, Marzetta, Thomas L., Hong Yang, Rao, Bhaskar D.

“…Cell-free Massive multiple-input multiple-output (MIMO) comprises a large number of distributed low-cost low-power single antenna access points (APs) connected…”
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Uplink Interference Reduction in Large-Scale Antenna Systems by Adhikary, Ansuman, Ashikhmin, Alexei, Marzetta, Thomas L.

“…A massive MIMO system entails a large number (tens or hundreds) of base station antennas serving a much smaller number of terminals. These systems demonstrate…”
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Wirelessly Powered Cell-Free IoT: Analysis and Optimization by Wang, Xinhua, Ashikhmin, Alexei, Wang, Xiaodong

“…In this article, we propose a wirelessly powered Internet-of-Things (IoT) system based on the cell-free massive MIMO technology. In such a system, during the…”
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An Overview of Massive MIMO: Benefits and Challenges by Lu Lu, Li, Geoffrey Ye, Swindlehurst, A. Lee, Ashikhmin, Alexei, Rui Zhang

“…Massive multiple-input multiple-output (MIMO) wireless communications refers to the idea equipping cellular base stations (BSs) with a very large number of…”
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Inter-Cell Interference in Noncooperative TDD Large Scale Antenna Systems by Fernandes, F., Ashikhmin, A., Marzetta, T. L.

“…In this paper we study the performance of cellular networks when their base stations have an unlimited number of antennas. In previous work, the asymptotic…”
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Two-Stage Channel Estimation Approach for Cell-Free IoT With Massive Random Access by Wang, Xinhua, Ashikhmin, Alexei, Dong, Zhicheng, Zhai, Chao

“…We investigate the activity detection and channel estimation issues for cell-free Internet of Things (IoT) networks with massive random access. In each time…”
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Performance of cell-free massive MIMO systems with MMSE and LSFD receivers by Nayebi, Elina, Ashikhmin, Alexei, Marzetta, Thomas L., Rao, Bhaskar D.

“…Cell-Free Massive MIMO comprises a large number of distributed single-antenna access points (APs) serving a much smaller number of users. There is no…”
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A Scalable and Energy-Efficient IoT System Supported by Cell-Free Massive MIMO by Yan, Hangsong, Ashikhmin, Alexei, Yang, Hong

“…An Internet-of-Things (IoT) system supports a massive number of IoT devices wirelessly. We show how to use cell-free (CF) massive multiple input and multiple…”
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Pilot Contamination and Precoding in Multi-Cell TDD Systems by Jose, J., Ashikhmin, A., Marzetta, T. L., Vishwanath, S.

“…This paper considers a multi-cell multiple antenna system with precoding used at the base stations for downlink transmission. Channel state information (CSI)…”
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Storage and Communication Tradeoff for Wireless Coded Blockchains by Yang, Changlin, Wang, Xiaodong, Ashikhmin, Alexei

“…Recently, coded blockchain systems have been proposed to encode blockchain into coded fragments and distributively store them. These fragments can be collected…”
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Quantum error detection .I. Statement of the problem by Ashikhmin, A.E., Barg, A.M., Knill, E., Litsyn, S.N.

“…This paper is devoted to the problem of error detection with quantum codes. We show that it is possible to give a consistent definition of the undetected error…”
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Quantum Data-Syndrome Codes by Ashikhmin, Alexei, Lai, Ching-Yi, Brun, Todd A.

“…Performing active quantum error correction to protect fragile quantum states highly depends on the correctness of measured error syndromes. To obtain reliable…”
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Fidelity Lower Bounds for Stabilizer and CSS Quantum Codes by Ashikhmin, Alexei

“…In this paper, we estimate the fidelity of stabilizer and CSS codes. First, we derive a lower bound on the fidelity of a stabilizer code via its quantum…”
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Quantum error detection .II. Bounds by Ashikhmin, A.E., Barg, A.M., Knill, E., Litsyn, S.N.

“…For pt.I see ibid., vol.46, no.3, p.778-88 (2000). In Part I of this paper we formulated the problem of error detection with quantum codes on the depolarizing…”
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Bounds on distance distributions in codes of known size by Ashikhmin, A.E., Cohen, G.D., Krivelevich, M., Litsyn, S.N.

“…We treat the problem of bounding components of the possible distance distributions of codes given the knowledge of their size and possibly minimum distance…”
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Long-Term Scheduling and Power Control for Wirelessly Powered Cell-Free IoT by Wang, Xinhua, Wang, Xiaodong, Ashikhmin, Alexei

“…We investigate the long-term scheduling and power control scheme for a wirelessly powered cell-free Internet-of-Things (IoT) network which consists of…”
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A new upper bound on the reliability function of the Gaussian channel by Ashikhmin, A.E., Barg, A., Litsyn, S.N.

“…We derive a new upper bound on the exponent of error probability of decoding for the best possible codes in the Gaussian channel. This bound is tighter than…”
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