Aki Hakkarainen

Most-cited papers

High-Efficiency Device Positioning and Location-Aware Communications in Dense 5G Networks
Mike Koivisto, Aki Hakkarainen, Mário Costa, Petteri Kela +2 more
2016IEEE Communications Magazine167 citations Open access
Semantic Scholar
Performance and Cramer–Rao Bounds for DoA/RSS Estimation and Transmitter Localization Using Sectorized Antennas
J. Werner, Jun Wang, Aki Hakkarainen, D. Cabric +1 more
2016IEEE Transactions on Vehicular Technology71 citations
Semantic Scholar
Location Based Beamforming in 5G Ultra-Dense Networks
Petteri Kela, Mário Costa, J. Turkka, Mike Koivisto +5 more
2016IEEE Vehicular Technology Conference69 citations
Semantic Scholar
Widely-linear beamforming and RF impairment suppression in massive antenna arrays
Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama
2013Journal of Communications and Networks68 citations
Semantic Scholar
Impact of Power Amplifier Nonlinearities in Multi-User Massive MIMO Downlink
Yaning Zou, Orod Raeesi, Lauri Antilla, Aki Hakkarainen +4 more
20152015 IEEE Globecom Workshops (GC Wkshps)54 citations
Semantic Scholar
Sectorized Antenna-based DoA Estimation and Localization: Advanced Algorithms and Measurements
J. Werner, Jun Wang, Aki Hakkarainen, N. Gulati +5 more
2015IEEE Journal on Selected Areas in Communications49 citations
Semantic Scholar
DoA Estimation Using Compact CRLH Leaky-Wave Antennas: Novel Algorithms and Measured Performance
H. Paaso, N. Gulati, Damiano Patron, Aki Hakkarainen +4 more
2017IEEE Transactions on Antennas and Propagation43 citations Open access
Semantic Scholar
Analysis and Augmented Spatial Processing for Uplink OFDMA MU-MIMO Receiver With Transceiver I/Q Imbalance and External Interference
Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama
2014IEEE Transactions on Wireless Communications36 citations Open access
Semantic Scholar
Joint User Node Positioning and Clock Offset Estimation in 5G Ultra-Dense Networks
J. Werner, Mário Costa, Aki Hakkarainen, Kari Leppänen +1 more
2014Global Communications Conference35 citations
Semantic Scholar
Joint 3D Positioning and Network Synchronization in 5G Ultra-Dense Networks Using UKF and EKF
Mike Koivisto, Mário Costa, Aki Hakkarainen, Kari Leppänen +1 more
20162016 IEEE Globecom Workshops (GC Wkshps)33 citations Open access
Semantic Scholar
High-Efficiency Device Localization in 5G Ultra-Dense Networks: Prospects and Enabling Technologies
Aki Hakkarainen, J. Werner, Mário Costa, Kari Leppänen +1 more
2015IEEE Vehicular Technology Conference28 citations
Semantic Scholar
Continuous high-accuracy radio positioning of cars in ultra-dense 5G networks
Mike Koivisto, Aki Hakkarainen, Mário Costa, Jukka Talvitie +3 more
20172017 13th International Wireless Communications and Mobile Computing Conference (IWCMC)22 citations
Semantic Scholar
Reconfigurable antenna based doa estimation and localization in cognitive radios: Low complexity algorithms and practical measurements
Aki Hakkarainen, J. Werner, N. Gulati, Damiano Patron +5 more
2014International Conference on Cognitive Radio Oriented Wireless Networks and Communications17 citations Open access
Semantic Scholar
Primary user localization in cognitive radio networks using sectorized antennas
J. Werner, Jun Wang, Aki Hakkarainen, M. Valkama +1 more
2013Wireless on Demand Network Systems and Service16 citations
Semantic Scholar
Precoded massive MU-MIMO uplink transmission under transceiver I/Q imbalance
Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama
20142014 IEEE Globecom Workshops (GC Wkshps)11 citations
Semantic Scholar
RF imperfections in antenna arrays: Response analysis and widely-linear digital beamforming
Aki Hakkarainen, J. Werner, M. Valkama
2013IEEE Radio and Wireless Symposium10 citations
Semantic Scholar
Estimating the primary user location and transmit power in cognitive radio systems using extended Kalman filters
J. Werner, Aki Hakkarainen, M. Valkama
2013Wireless on Demand Network Systems and Service9 citations
Semantic Scholar
Cramer-Rao Bounds for Hybrid RSS-DOA Based Emitter Location and Transmit Power Estimation in Cognitive Radio Systems
J. Werner, Aki Hakkarainen, M. Valkama
2013IEEE Vehicular Technology Conference8 citations
Semantic Scholar
Primary user DoA and RSS estimation in cognitive Radio networks using sectorized antennas
J. Werner, Jun Wang, Aki Hakkarainen, M. Valkama +1 more
20138th International Conference on Cognitive Radio Oriented Wireless Networks8 citations Open access
Semantic Scholar
Experimental Results of Novel DoA Estimation Algorithms for Compact Reconfigurable Antennas
H. Paaso, Aki Hakkarainen, N. Gulati, Damiano Patron +3 more
20177 citations Open access
Semantic Scholar
Continuous device positioning and synchronization in 5g dense networks with skewed clocks
Mike Koivisto, Aki Hakkarainen, Mário Costa, Kari Leppänen +1 more
2017International Workshop on Signal Processing Advances in Wireless Communications5 citations
Semantic Scholar
RF-Aware Widely-Linear MMSE Beamforming
Aki Hakkarainen, J. Werner, M. Renfors, K. Dandekar +1 more
2013International Symposium on Wireless Communication Systems4 citations
Semantic Scholar
Transceiver I/Q imbalance and widely-linear spatial processing in large antenna systems
Aki Hakkarainen, J. Werner, M. Renfors, K. Dandekar +1 more
2015International Symposium on Wireless Communication Systems2 citations
Semantic Scholar
RF-aware widely-linear beamforming and null-steering in cognitive Radio transmitters
Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama
20138th International Conference on Cognitive Radio Oriented Wireless Networks2 citations Open access
Semantic Scholar
Interference suppression with antenna arrays in OFDM systems under transceiver I/Q imbalance
Aki Hakkarainen, J. Werner, K. Dandekar, M. Valkama
2014International Conference on Cognitive Radio Oriented Wireless Networks and Communications1 citations Open access
Semantic Scholar