OFDM Multiple Antennas Cognitive Radio Relay CDMA Synchronization Channel Estimation Spectrum Sharing Interference Cancellation Resource Allocation Spectrum Sensing Neural Networks Full duplex Stochastic Geometry Equalizer Bi-Directional Feedback Energy Harvesting Heterogeneous Networks Femtocell Device-to-Device (D2D) Idle cells Cross-link interference FBMC Spectral efficiency Cell Search SINR mismatch problem NOMA Ultra-dense small cell networks HetNet interference management Dynamic TDD outage probability selection diversity achievable sum rate bursty traffic model Cognitive relay networks mode selection multi-spectral 5G Complexity Singular Vale Decomposition OQAM tabu-search Filtered OFDM TDD configuration flexible duplex Handoff GFDM Heterogeneous channel estimation capability self-interference cancellation in-band full-duplex system Channel estimation error coexistence CP-OFDM MU-MIMO automatic repeat request (ARQ) Two-way communications UWB full-duplex relay full-duplex cellular Simultaneous Sensing and Transmission Correlated MIMO transmission capacity (TC) sensing duration Bi-directional full-duplex Vehicle-to-Vehicle prototype filter pilot signal Coexistence scenarios resource size control Vehicle-to-vehicle communication link reliability interference to noise ratio eigen decomposition TS-W-OFDM Resource management Cooperative systems LTE-based V2V Aggregate interference time-frequency efficiency mixed numerology Windowing Reliability C-V2V Asynchronous Transmission Full-duplex Computation offloading Grant-free Transmission Preamble full-spreading NOMA massive connectivity Edge computing Multiple access MLP Deep learning Railway Mobility interference mitigation HST non-orthogonal multiple access
Status : Published 
Date : 2014-01 
Title : Simultaneous Sensing and Transmission in Cognitive Radio 
Authors : Jihaeng Heo, Hyungsik Ju, Sungsoo Park, Eunsun Kim, and Daesik Hong 
Journal : IEEE Transactions on Wireless Communications 
Abstract : In cognitive radio, spectrum sensing is used to find the white spectrum or protect the primary user (PU) from interference caused by the secondary user (SU). There are two conventional spectrum sensing approaches: quiet and active. However, these conventional approaches have several problems. In quiet sensing, the quiet period degrades the SU capacity. With active sensing, the SU capacity is also degraded by the need for additional resource consumption and the mismatch in feedback information.
In order to mitigate these problems, the structure of simultaneous PU sensing and data transmission is introduced. This structure is equipped with antenna isolation and self-interference cancellation in which the communication and the sensing radios are already assumed to be significantly isolated. This approach is designed so that the SU transmitter can sense PU signals and transmit data signals at the same time by dividing its spatial resources. Expanding on this work, we propose a concept of ”TranSensing” which adaptively uses spatial resource according to the surrounding environments. To effectively use TranSensing, we propose a two-stage algorithm (TSA) which consists of correlation based antenna partitioning and conditional sensing duration control designed to balance SU capacity and computational complexity. Finally, the impact of residual interference on TranSensing is investigated.
Simulation results show that TranSensing with TSA enhances the SU capacity over the conventional quiet or active sensing methods in all PU signal-to-noise ratio ranges. In addition, we show the residual interference criterion for TranSensing. 
URL : http://ieeexplore.ieee.org/xpl/articleDe...unications 
Download : http://mirinae.yonsei.ac.kr/?module=file...770308d475 
Jihaeng Heo; Hyungsik Ju; Sungsoo Park; Eunsun Kim; Daesik Hong, "Simultaneous Sensing and Transmission in Cognitive Radio," Wireless Communications, IEEE Transactions on , vol.13, no.4, pp.1948,1959, April 2014
doi: 10.1109/TWC.2014.030614.130532
keywords: {cognitive radio;interference suppression;spread spectrum communication;PU signals;SU transmitter;TranSensing;antenna isolation;cognitive radio;secondary user;self-interference cancellation;spectrum sensing;two-stage algorithm;white spectrum;Cognitive radio;Data communication;Interference;Sensors;Transmitting antennas;Cognitive radio;correlated MIMO;simultaneous sensing and transmission;spectrum sensing},
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6775369&isnumber=6803026
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» [IEEE Trans. Wireless Commun.] Jihaeng Heo, Hyungsik Ju, Sungsoo Park, Eunsun Kim, and Daesik Hong, "Simultaneous Sensing and Transmission in Cognitive Radio," IEEE Transactions on Wireless Communications, Jan. 2014 file Published  2014-01