Zobrazeno 1 - 10
of 353
pro vyhledávání: '"Ardakani, Masoud"'
We address the reflection optimization problem for a reconfigurable intelligent surface (RIS), where the RIS elements feature a set of non-uniformly spaced discrete phase shifts. This is motivated by the actual behavior of practical RIS elements, whe
Externí odkaz:
http://arxiv.org/abs/2311.07096
The discussion on using zero padding (ZP) instead of a cyclic prefix (CP) for enhancing channel estimation and equalization performance is a recurring topic in waveform design for future wireless systems that high spectral efficiency and location awa
Externí odkaz:
http://arxiv.org/abs/2303.07453
Publikováno v:
IEEE Transactions on Signal Processing 69 (2021): 641-654
Existing Orthogonal Frequency-Division Multiplexing (OFDM) variants based on cyclic prefix (CP) allow for efficient time synchronization, but suffer from lower power efficiency compared to zero-padded (ZP)-OFDM. Because of its power efficiency, ZP-OF
Externí odkaz:
http://arxiv.org/abs/2302.08711
Recently, grant-free transmission paradigm has been introduced for massive Internet of Things (IoT) networks to save both time and bandwidth and transmit the message with low latency. In order to accurately decode the message of each device at the ba
Externí odkaz:
http://arxiv.org/abs/2301.01274
Publikováno v:
IEEE Wireless Commun. Lett., vol. 12, no. 6, pp. 1002 - 1006, Mar. 2023
We propose efficient and low-complexity multiuser detection (MUD) algorithms for Gaussian multiple access channel (G-MAC) for short-packet transmission in massive machine type communications. To do so, we first formulate the G-MAC MUD problem as a sp
Externí odkaz:
http://arxiv.org/abs/2202.10566
In wireless communication systems, Orthogonal Frequency-Division Multiplexing (OFDM) includes variants using either a cyclic prefix (CP) or a zero padding (ZP) as the guard interval to avoid inter-symbol interference. OFDM is ideally suited to deal w
Externí odkaz:
http://arxiv.org/abs/2008.06586
In this paper, we study a massive multiple-input multiple-output (mMIMO) relay network where multiple source-destination pairs exchange information through a common relay equipped with a massive antenna array. The source users perform simultaneous wi
Externí odkaz:
http://arxiv.org/abs/2001.11803
Akademický článek
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We consider the use of deep neural network (DNN) to develop a decision-directed (DD)-channel estimation (CE) algorithm for multiple-input multiple-output (MIMO)-space-time block coded systems in highly dynamic vehicular environments. We propose the u
Externí odkaz:
http://arxiv.org/abs/1901.03435
Publikováno v:
IEEE Trans. Wireless Commun. vol. 18, no. 9, pp. 4368-4378, June. 2019
In this paper, a deep learning (DL)-based sphere decoding algorithm is proposed, where the radius of the decoding hypersphere is learned by a deep neural network (DNN). The performance achieved by the proposed algorithm is very close to the optimal m
Externí odkaz:
http://arxiv.org/abs/1807.03162