Browsing by Subject "Beamforming"
Now showing items 1-15 of 15
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A sparsity-aware cooperative protocol for cognitive radio networks with energy-harvesting primary user
( IEEE , 2015 , Conference Paper)We consider a cognitive setting composed of multiple primary frequency bands each of which consists of a limited-battery energy-harvesting primary user and a secondary user. The primary user is equipped with a limited-capacity ... -
Digital baseband compensation of frequency-dependent joint TX/RX I/Q imbalance in beamforming MIMO OFDM transceivers
( IEEE , 2012 , Conference Paper)In this paper, we investigate the effects of asymmetric frequency-dependent joint transmit-receive I/Q imbalance on the performance of beamforming MIMO-OFDM systems. We derive the throughput-maximizing transmit/receive ... -
Discrete Input Signaling for Secure MISO VLC Systems with Randomly Located Eavesdroppers
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)We study in this paper the secrecy performance of the multiple-input single-output (MISO) visible light communication (VLC) channel in the presence of randomly located eavesdroppers. We consider a system model comprising ... -
Energy-Aware Cooperative Wireless Networks with Multiple Cognitive Users
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In this paper, we study and analyze cooperative cognitive radio networks with arbitrary number of secondary users (SUs). Each SU is considered a prospective relay for the primary user (PU) besides having its own data ... -
Exploiting Sparsity in Amplify-and-Forward Broadband Multiple Relay Selection
( IEEE , 2019 , Article)Cooperative communication has attracted significant attention in the last decade due to its ability to increase the spatial diversity order with only single-antenna nodes. However, most of the techniques in the literature ... -
Exploiting sparsity of relay-assisted cognitive radio networks
( IEEE , 2015 , Conference Paper)We propose a novel protocol for secondary users based on compressive sensing principles. The secondary user assigned to one of the primary frequency bands is aided by a set of nearby secondary users, which we refer to as ... -
Machine-Learning Based Relay Selection in AF Cooperative Networks
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)With the significant increase of wireless network nodes and traffic load in recent years, especially in the emerging internet-of-things (IoT) and vehicular networks, the design of a fast adaptive relay selection algorithm ... -
Modelling and compensation of frequency-dependent I/Q imbalance in multiple beamforming OFDM transceivers
( IEEE , 2012 , Conference Paper)In this paper, we investigate the effects of asymmetric frequency-dependent joint transmit-receive I/Q imbalance on the performance of multiple beamforming MIMO OFDM systems. We derive the throughput-maximizing TX/RX ... -
Physical layer secrecy performance of multiple antennas transmission with partial legitimate user CSI
( Institution of Engineering and Technology , 2019 , Article)Conventional beamforming transmission techniques can enhance physical layer secrecy performance while requiring the full channel state information (CSI) of legitimate users and even that of eavesdroppers at the transmitter. ... -
Preserving the beamforming effect for spatial cue-based pseudo-binaural dereverberation of a single source
( Academic Press , 2023 , Article)Reverberations are unavoidable in enclosures, resulting in reduced intelligibility for hearing impaired and non-native listeners and even for the normal hearing listeners in noisy circumstances. It also degrades the ... -
Priority-based zero-forcing in spectrum sharing cognitive systems
( IEEE , 2013 , Article)We consider a spectrum sharing scenario between cognitive radio (CR) users and a licensed primary user (PU), in which the PU is not able to successfully transmit data to its destined receiver. The cognitive base station ... -
Relay selection in FDD amplify-and-forward cooperative networks
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)In this paper, the problems of relay selection and distributed beamforming are investigated for bi-directional dual-hop amplify-and-forward frequency-division duplex cooperative wireless networks. When using individual ... -
Secrecy outage analysis over random beamforming transmission with user scheduling: Collusion vs. exclusion
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In this letter, we study the interacting effects of the exclusion zone and eavesdropper colluding strategy on the secrecy performance of multiple-antenna transmission system. In particular, a base station (BS) applies ... -
Security concerns on machine learning solutions for 6G networks in mmWave beam prediction
( Elsevier B.V. , 2022 , Article)6G – sixth generation – is the latest cellular technology currently under development for wireless communication systems. In recent years, machine learning (ML) algorithms have been applied widely in various fields, such ... -
SINR analysis for beamforming OFDM systems under joint transmit-receive I/Q imbalance
( IEEE , 2012 , Conference Paper)In this paper, we derive an analytical expression for the subcarrier average SINR of a beamforming OFDM system in the presence of joint transmit-receive I/Q imbalance. The derived expression quantifies the impact of the ...