Browsing by Author "Taherpour, Abbas"
Now showing items 1-20 of 30
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Adaptive hierarchical cooperative communication using energy harvesting relay
(2013 , Conference)In this paper, we present an adaptive wireless communication system with energy harvesting relay where, two sources wish to send data to a destination via an energy harvesting relay that utilizes hierarchical constellation. ... -
Compressed wideband spectrum sensing with correlated subband occupancy in multi-antenna cognitive radios
(2012 , Conference)In this paper, we investigate the use of multiple antennas at the cognitive radio receiver for improved wideband spectrum sensing and exploit compressed sensing to reduce the extremely high sampling rate of wideband signal. ... -
Correlated Multiple Antennas Spectrum Sensing under Calibration Uncertainty
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)We address the problem of spectrum sensing in cognitive radios (CRs) when the secondary user (SU) is equipped with a multiantenna receiver. We consider scenarios with correlation between the received channels at different ... -
Detection of temporally correlated primary user signal with multiple antennas
( Springer Verlag , 2015 , Conference)In this paper, we address the problem of multiple antenna spectrum sensing in cognitive radios (CRs) when the samples of the primary user (PU) signal as well as samples of noise are assumed to be temporally correlated. We ... -
Distributed spectrum sensing of correlated observations in cognitive radio networks
(2013 , Conference)In this paper, Collaborative Spectrum Sensing (CSS) as one of the most efficient sensing approaches in Cognitive Radio Networks (CRNs) is investigated when the Secondary Users (SUs) observations are assumed to be correlated. ... -
Dynamic interference-limited relay sharing in cognitive radio networks by using hierarchical modulation
( Institution of Engineering and Technology , 2017 , Article)Sharing a relay in cognitive radio (CR) networks in order to enhance the secondary user's (SU's) performance in an interference-limited scheme is investigated. It is assumed, by utilising hierarchical modulation, a shared ... -
Efficient collaborative spectrum sensing under the smart primary user emulation attacker network
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)In this paper, collaborative spectrum sensing to detect random signals corrupted by Gaussian noise in the presence of Primary User Emulation Attackers (PUEAs) is studied. We consider smart PUEAs which aims at increasing ... -
Eigenvalue-Based Multiple Antenna Spectrum Sensing: Higher Order Moments
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)The problem of multiple antenna spectrum sensing in cognitive radio (CR) networks is studied in this paper. We propose two new invariant constant false-alarm rate eigenvalue-based (EVB) detectors, using the higher order ... -
Finite-sample size multiple antennas spectrum sensing
(2012 , Conference)In this paper, we consider the problem of multiple antenna spectrum sensing in Cognitive Radios (CR) by exploiting the prior information about unknown parameters. Specifically, we consider a blind spectrum sensing problem ... -
Fractional low order cyclostationary-based spectrum sensing in cognitive radio networks
( Springer Verlag , 2015 , Conference)In this paper, we study the problem of cyclostationary spectrum sensing in cognitive radio networks based on cyclic properties of linear modulations. For this purpose, we use fractional order of observations in cyclic ... -
Hybrid underlay/overlay cognitive radio system with hierarchical modulation in the presence of channel estimation error
( IEEE , 2014 , Conference)In this paper, we study the performance of hybrid cognitive radio (CR) system in the presence of channel estimation error (CER) in terms of bit-error-probability (BEP) and outage probability. We assume simultaneous switching ... -
Impact of stochastic RF energy harvesting relay on wireless point-to-point network
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference)In this paper, we study a general practical stochastic energy harvesting (EH) model where in, an EH relay is able to harvest energy from the radio frequency (RF) radiation in a super capacitor. The different aspects of ... -
Multiple antenna cyclostationary-based detection of primary users with multiple cyclic frequency in Cognitive Radios
( IEEE , 2014 , Conference)In this paper, we study the problem of multiple antenna spectrum sensing by using cyclostationary features of Primary Users (PUs) signals in Cognitive Radios (CRs). We consider the general case of multiple antenna sensing ... -
Multiuser scheduling on downlink communications by using adaptive hierarchical modulation
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference)In this paper, we propose a novel downlink system that is able to maximize the number of users which could be served with high correct decoding probability while, minimizing the total consumed energy for data reconstruction ... -
Non-uniform quantized distributed sensing in practical wireless rayleigh fading channel
( Springer Verlag , 2015 , Conference)In this paper, we study non-uniform multilevel quantization problem in cognitive radio networks (CRNs). We consider a practical collaborative spectrum sensing (CSS) scenario in which secondary users (SUs) cooperate with ... -
On the more accurate channel model and positioning based on time-of-arrival for visible light localization
( SPIE , 2017 , Article)This paper presents an improved propagation channel model for the visible light in indoor environments. We employ this model to derive an enhanced positioning algorithm using on the relation between the time-of-arrivals ... -
On the Performance of Hadamard Ratio Detector-Based Spectrum Sensing for Cognitive Radios
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)We consider the problem of multiantenna spectrum sensing (SS) in cognitive radios (CRs) when the receivers are assumed to be uncalibrated across the antennas. The performance of the Hadamard Ratio Detector (HRD) is analyzed ... -
Opportunistic Throughput Optimization in Energy Harvesting Dynamic Spectrum Sharing Wireless Networks
( IEEE , 2024 , Article)We investigate opportunistic transmissions in a time-slotted wireless network, emphasizing constraints arising from finite durations allocated to various network operations and the availability of energy for these operations. ... -
Optimal collaborative energy harvesting spectrum sensing with limited time resource
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference)We study a collaborative spectrum sensing (CSS) problem with limited time and energy resources in cognitive radio (CR) network. Time duration of sensing and data transmission, if the spectrum is identified as vacant, are ... -
Optimal power allocation and relay selection in two-way multi-relay cooperative communication
(2013 , Conference)In this paper, we investigate the power allocation in two-way multi-relay assisted cooperative network in which the relays operate in decode-and-forward (DF) protocol. In the proposed method for choosing the best relay ...
