Compensation schemes for phase noise and residual frequency offset in OFDM systems. - Konstantinos Nikitopoulos; Andreas Polydoros (GLOBECOM, 2001)

Decision-directed compensation of phase noise and residual frequency offset in a space-Time OFDM receiver. - Konstantinos Nikitopoulos; Andreas Polydoros (IEEE Commun. Lett., 2004)

Flexible Radio: A Framework for Optimized Multimodal Operation via Dynamic Signal Design. - Ioannis Dagres; Andreas Zalonis; Nikos Dimitriou; Konstantinos Nikitopoulos; Andreas Polydoros (EURASIP J. Wirel. Commun. Netw., 2005)

Phase-impairment effects and compensation algorithms for OFDM systems. - Konstantinos Nikitopoulos; Andreas Polydoros (IEEE Trans. Commun., 2005)

Inter-Frame, Fine Frequency/Phase Synchronization forSimple Space-Time-Coded OFDM Receivers. - Konstantinos Nikitopoulos; Andreas Polydoros (IEEE Trans. Wirel. Commun., 2007)

Searching in the Delta Lattice: An Efficient MIMO Detection for Iterative Receivers. - I-Wei Lai; Chun-Hao Liao; Ernst Martin Witte; David Kammler; Filippo Borlenghi; Konstantinos Nikitopoulos; Venkatesh Ramakrishnan; Dan Zhang 003; Tzi-Dar Chiueh; Gerd Ascheid; Heinrich Meyr (GLOBECOM, 2009)

Combining orthogonalized partial metrics: Efficient enumeration for soft-input sphere decoder. - Chun-Hao Liao; I-Wei Lai; Konstantinos Nikitopoulos; Filippo Borlenghi; David Kammler; Ernst Martin Witte; Dan Zhang 003; Tzi-Dar Chiueh; Gerd Ascheid; Heinrich Meyr (PIMRC, 2009)

Complexity-Efficient Enumeration Techniques for Soft-Input, Soft-Output Sphere Decoding - Konstantinos Nikitopoulos; Ernst Martin Witte; Dan Zhang 003; David Kammler; I-Wei Lai; Chun-Hao Liao; Filippo Borlenghi; Gerd Ascheid (CoRR, 2009)

Decision-aided compensation of severe phase-impairment-induced inter-carrier interference in frequency-selective OFDM. - Konstantinos Nikitopoulos; Stelios Stefanatos; Aggelos K. Katsaggelos (IEEE Trans. Wirel. Commun., 2009)

Iterative channel estimation control for MIMO-OFDM Systems. - Dan Zhang 003; Konstantinos Nikitopoulos; I-Wei Lai; Gerd Ascheid; Heinrich Meyr (CISS, 2010)

Informed message update for iterative MIMO demapping and turbo decoding. - Dan Zhang 003; I-Wei Lai; Konstantinos Nikitopoulos; Gerd Ascheid (ISITA, 2010)

MIMO APP Receiver Processing with Performance-Determined Complexity - Konstantinos Nikitopoulos; Gerd Ascheid (CoRR, 2010)

Complexity-efficient enumeration techniques for soft-input, soft-output sphere decoding. - Konstantinos Nikitopoulos; Dan Zhang 003; I-Wei Lai; Gerd Ascheid (IEEE Commun. Lett., 2010)

Complexity Adjusted Soft-Output Sphere Decoding by Adaptive LLR Clipping. - Konstantinos Nikitopoulos; Gerd Ascheid (IEEE Commun. Lett., 2011)

Multi-user detection for asynchronous space-frequency block coded schemes in frequency selective environments. - Konstantinos Nikitopoulos; Sanaz Barghi; Hamid Jafarkhani; Homayoun Yousefi'zadeh (GLOBECOM, 2012)

A simple complexity adjustment technique for soft MIMO receivers in broadcasting scenarios. - Konstantinos Nikitopoulos; Gerd Ascheid (ISWCS, 2012)

Approximate MIMO Iterative Processing With Adjustable Complexity Requirements. - Konstantinos Nikitopoulos; Gerd Ascheid (IEEE Trans. Veh. Technol., 2012)

Geosphere: consistently turning MIMO capacity into throughput. - Konstantinos Nikitopoulos; Juan Zhou; Ben J. Congdon; Kyle Jamieson (SIGCOMM, 2014)

Rateless wireless systems: Gains, approaches, and challenges. - Farhad Mehran; Konstantinos Nikitopoulos; Pei Xiao 001; Qingchun Chen (ChinaSIP, 2015)

Exact Max-Log MAP Soft-Output Sphere Decoding via Approximate Schnorr-Euchner Enumeration. - Konstantinos Nikitopoulos; Athanasios Karachalios; Dionysios I. Reisis (IEEE Trans. Veh. Technol., 2015)

MultiSphere: Massively Parallel Tree Search for Large Sphere Decoders. - Konstantinos Nikitopoulos; Daniil Chatzipanagiotis; Chathura Jayawardena; Rahim Tafazolli (GLOBECOM, 2016)

Space-Time Super-Modulation and Its Application to Joint Medium Access and Rateless Transmission. - Konstantinos Nikitopoulos; Farhad Mehran; Hamid Jafarkhani (GLOBECOM, 2016)

FlexCore: Massively Parallel and Flexible Processing for Large MIMO Access Points. - Christopher Husmann; Georgios Georgis; Konstantinos Nikitopoulos; Kyle Jamieson (NSDI, 2017)

Efficient DCT-MCM detection for single and multi-antenna wireless systems. - Chang He; Pei Xiao 001; Lei Zhang 035; Juquan Mao; Aijun Cao; Konstantinos Nikitopoulos (PIMRC, 2017)

A DHT-based multicarrier modulation system with pairwise ML detection. - Juquan Mao; Chin-Liang Wang; Lei Zhang 035; Chang He; Pei Xiao 001; Konstantinos Nikitopoulos (PIMRC, 2017)

Geosphere: An Exact Depth-First Sphere Decoder Architecture Scalable to Very Dense Constellations. - Georgios Georgis; Konstantinos Nikitopoulos; Kyle Jamieson (IEEE Access, 2017)

Space-Time Super-Modulation: Concept, Design Rules, and Its Application to Joint Medium Access and Rateless Transmission. - Konstantinos Nikitopoulos; Farhad Mehran; Hamid Jafarkhani (IEEE Trans. Wirel. Commun., 2017)

ViPer MIMO: Increasing Large MIMO Efficiency via Practical Vector-Perturbation. - Christopher Husmann; Konstantinos Nikitopoulos (GLOBECOM, 2018)

Antipodal Detection and Decoding for Large Multi-User MIMO with Reduced Base-Station Antennas. - Christopher Husmann; Rahim Tafazolli; Konstantinos Nikitopoulos (GLOBECOM Workshops, 2018)

Massively Parallel Detection for Non-Orthogonal Signal Transmissions. - Chathura Jayawardena; Konstantinos Nikitopoulos (GLOBECOM Workshops, 2018)

Generalized Space-Time Super-Modulation for Headerless Grant-Free Rateless Multiple Access. - Farhad Mehran; Konstantinos Nikitopoulos (GLOBECOM, 2018)

Reduced Latency ML Polar Decoding via Multiple Sphere-Decoding Tree Searches. - Christopher Husmann; Panagiotis Chatzi Nikolaou; Konstantinos Nikitopoulos (IEEE Trans. Veh. Technol., 2018)

Index Modulation Assisted DCT-OFDM with Enhanced Transceiver Design. - Chang He; Aijun Cao; Lixia Xiao; Lei Zhang 035; Pei Xiao 001; Konstantinos Nikitopoulos (ICC, 2019)

SWORD: Towards a Soft and Open Radio Design for Rapid Development, Profiling, Validation and Testing. - Georgios Georgis; Marcin Filo; Alexios Thanos; Christopher Husmann; Juan Carlos De Luna Ducoing; Rahim Tafazolli; Konstantinos Nikitopoulos (IEEE Access, 2019)

Low-Complexity Hybrid Beamforming for Massive MIMO Systems in Frequency-Selective Channels. - Sohail Payami; Mathini Sellathurai; Konstantinos Nikitopoulos (IEEE Access, 2019)

Massively Parallel Tree Search for High-Dimensional Sphere Decoders. - Konstantinos Nikitopoulos; Georgios Georgis; Chathura Jayawardena; Daniil Chatzipanagiotis; Rahim Tafazolli (IEEE Trans. Parallel Distributed Syst., 2019)

Enhanced DCT-OFDM System With Index Modulation. - Chang He; Aijun Cao; Lixia Xiao; Lei Zhang 035; Pei Xiao 001; Konstantinos Nikitopoulos (IEEE Trans. Veh. Technol., 2019)

A DSP Acceleration Framework For Software-Defined Radios On X86 64. - Georgios Georgis; Alexios Thanos; Marcin Filo; Konstantinos Nikitopoulos (ICASSP, 2020)

Evaluating Non-Linear Beamforming in a 3GPP-Compliant Framework Using the SWORD Platform. - Marcin Filo; Juan Carlos De Luna Ducoing; Chathura Jayawardena; Christopher Husmann; Rahim Tafazolli; Konstantinos Nikitopoulos (PIMRC, 2020)

Filtered OFDM: An Insight Into Intrinsic In-Band Interference and Filter Frequency Response Selectivity. - Juquan Mao; Lei Zhang 035; Pei Xiao 001; Konstantinos Nikitopoulos (IEEE Access, 2020)

Developing the First mmWave Fully-Connected Hybrid Beamformer With a Large Antenna Array. - Sohail Payami; Mohsen Khalily; Ali Araghi; Tian Hong Loh; David Cheadle; Konstantinos Nikitopoulos; Rahim Tafazolli (IEEE Access, 2020)

Towards Radio Designs with Non-Linear Processing for Next Generation Mobile Systems. - Konstantinos Nikitopoulos; Marcin Filo; Chathura Jayawardena; Rahim Tafazolli (CoRR, 2020)

G-MultiSphere: Generalizing Massively Parallel Detection for Non-Orthogonal Signal Transmissions. - Chathura Jayawardena; Konstantinos Nikitopoulos (IEEE Trans. Commun., 2020)

Interference Analysis and Power Allocation in the Presence of Mixed Numerologies. - Juquan Mao; Lei Zhang 035; Pei Xiao 001; Konstantinos Nikitopoulos (IEEE Trans. Wirel. Commun., 2020)

Hybrid Beamforming With Switches and Phase Shifters Over Frequency-Selective Channels. - Sohail Payami; Mohsen Khalily; Tian Hong Loh; Konstantinos Nikitopoulos (IEEE Wirel. Commun. Lett., 2020)

DigiLogue: Ultra-Fast and Ultra-Power-Efficient Signal Processing for Tbps Wireless Systems. - Konstantinos Nikitopoulos; Mahmoud Mojarrad Kiasaraei (GLOBECOM (Workshops), 2021)

Towards 6G MIMO Systems, with Massively-Parallel Non-Linear Processing. - Juan Carlos De Luna Ducoing; Chathura Jayawardena; Marcin Filo; Konstantinos Nikitopoulos (MeditCom, 2021)

SACCESS: Towards A Software Acceleration Framework for 5G Radio Access Networks. - Marcin Filo; Yong Xia; Konstantinos Nikitopoulos (MeditCom, 2021)

The LDPC Challenge in Software-Based 5G New Radio Physical Layer Processing. - Elissaios-Alexios Papatheofanous; Dionysios I. Reisis; Konstantinos Nikitopoulos (MeditCom, 2021)

Non-Linear Base-Station Processing Within a 3GPP Compliant Framework. - Konstantinos Nikitopoulos; Marcin Filo; Chathura Jayawardena; Juan Carlos De Luna Ducoing; Rahim Tafazolli (IEEE Access, 2021)

LDPC Hardware Acceleration in 5G Open Radio Access Network Platforms. - Elissaios-Alexios Papatheofanous; Dionysios I. Reisis; Konstantinos Nikitopoulos (IEEE Access, 2021)

Gyre Precoding for MU-MIMO Systems. - Juan Carlos De Luna Ducoing; Yiping Qin; Yun Xue; Konstantinos Nikitopoulos (IEEE Commun. Lett., 2021)

Low-Complexity SCMA Detection for Unsupervised User Access. - Christopher Husmann; Chathura Jayawardena; Amine Maaref; Pei Xiao 001; Konstantinos Nikitopoulos (IEEE Commun. Lett., 2021)

Generalized Space-Time Super-Modulation and Its Application to Grant-Free Medium Access. - Farhad Mehran; Konstantinos Nikitopoulos; Hamid Jafarkhani (IEEE Trans. Commun., 2021)

A Signal Processing Framework for Agile RF Beamforming: From RF-Chain-Free to Hybrid Beamformers. - Sohail Payami; Konstantinos Nikitopoulos; Mohsen Khalily; Rahim Tafazolli (IEEE Trans. Commun., 2021)

On the Power Consumption of Massive-MIMO, 5G New Radio with Software-Based PHY Processing. - George N. Katsaros; Rahim Tafazolli; Konstantinos Nikitopoulos (GLOBECOM (Workshops), 2022)

Quantum Annealing for Next-Generation MU-MIMO Detection: Evaluation and Challenges. - Juan Carlos De Luna Ducoing; Konstantinos Nikitopoulos (ICC, 2022)

Reduced Complexity Matrix Inversions in Slow Time-Varying MIMO Channels. - Yong Xia; Chathura Jayawardena; Konstantinos Nikitopoulos (ICC, 2022)

Massively Parallel, Nonlinear Processing for 6G: Potential Gains and Further Research Challenges. - Konstantinos Nikitopoulos (IEEE Commun. Mag., 2022)

Scalable MU-MIMO User Scheduling for Next-Generation Wireless Networks. - Juan Carlos De Luna Ducoing; Konstantinos Nikitopoulos (CAMAD, 2023)

A DigiLogue Receiver Design for Tbps Wireless Transmissions over Flat-Fading Channels. - Mahmoud Mojarrad Kiasaraei; Rahim Tafazolli; Konstantinos Nikitopoulos (CAMAD, 2023)

Joint Frequency Offset Compensation and Detection for Multi-User MIMO-OFDM Systems with Frequency Asynchronous User Access. - Chathura Jayawardena; Konstantinos Nikitopoulos (ICC, 2023)

MU-MIMO, Open-RAN PHY with Linear and Massively Parallelizable Non-Linear Processing. - Konstantinos Nikitopoulos; Marcin Filo; George N. Katsaros; Chathura Jayawardena; Rahim Tafazolli (MobiCom, 2023)

An Assessment of Deep Learning Versus Massively Parallel, Non-Linear Methods for Highly-Efficient MIMO Detection. - Juan Carlos De Luna Ducoing; Chathura Jayawardena; Konstantinos Nikitopoulos (IEEE Access, 2023)

NL-COMM: Demonstrating Gains of Non-Linear Processing in Open-RAN Ecosystem. - Chathura Jayawardena; Marcin Filo; George N. Katsaros; Konstantinos Nikitopoulos (CAMAD, 2024)

NeuroMIMO: Employing the Neuromorphic Computing Principles to Achieve Power-Efficient MU-MIMO Detection. - Georgios Ntavazlis Katsaros; Juan Carlos De Luna Ducoing; Konstantinos Nikitopoulos (HotNets, 2024)

Ultra-Low-Complexity, Non-Linear Processing for MU-MIMO Systems. - Chathura Jayawardena; Konstantinos Nikitopoulos (PIMRC, 2024)

Enabling Ultra-Dense, Open-RAN, Vehicular Networks with Non-Linear MIMO Processing. - George N. Katsaros; Konstantinos Nikitopoulos (PIMRC, 2024)

Towards Neuromorphic Processing for Next-Generation MU-MIMO Detection. - George N. Katsaros; Juan Carlos De Luna Ducoing; Konstantinos Nikitopoulos (SPAWC, 2024)

An Analogue Channel Estimation Method Suitable for DigiLogue Receivers. - Mahmoud Mojarrad Kiasaraei; Konstantinos Nikitopoulos; Rahim Tafazolli (WCNC, 2024)

Power Efficient and Ultra Dense Open-RAN Vehicular Networks With Non-Linear Processing. - George N. Katsaros; Konstantinos Nikitopoulos (IEEE Access, 2024)

High-Throughput, Sorted QR Accelerator for Non-Linear Processing in Open-RAN Systems. - Thomas James Thomas; Marcin Filo; Konstantinos Nikitopoulos (IEEE Access, 2024)

High-Throughput Accelerator for Exact-MMSE Soft-Output Detection in Open RAN Systems. - Thomas James Thomas; Konstantinos Nikitopoulos (IEEE Access, 2024)

Toward Ultra-Power-Efficient, Tbps Wireless Systems via Analogue Processing: Existing Approaches, Challenges and Way Forward. - Mahmoud Mojarrad Kiasaraei; Konstantinos Nikitopoulos; Rahim Tafazolli (IEEE Commun. Surv. Tutorials, 2024)

Toward Software-Based, MIMO, Open-RAN PHY Architectures with Both Linear and Non-Linear Processing. - Konstantinos Nikitopoulos; George N. Katsaros; Marcin Filo; Chathura Jayawardena; Rahim Tafazolli (IEEE Commun. Mag., 2024)

MIMO-SoftiPHY: A Software-Based PHY Design and Implementation Framework for Highly-Efficient Open-RAN MIMO Radios. - George N. Katsaros; Marcin Filo; Rahim Tafazolli; Konstantinos Nikitopoulos (IEEE Trans. Mob. Comput., 2024)

NL-COMM: Enhanced Video Streaming via Advanced Non-Linear Processing. - Marcin Filo; George N. Katsaros; Chathura Jayawardena; Konstantinos Nikitopoulos (WCNC, 2025)

Power-Efficient RAN Intelligent Controllers Through Optimized KPI Monitoring. - João Paulo S. H. Lima; George N. Katsaros; Konstantinos Nikitopoulos (WCNC, 2025)

A Measurement-Based Power Consumption Model for Networks With Intelligent Control (RIC). - João Paulo S. H. Lima; Georgios Ntavazlis Katsaros; Rahim Tafazolli; Konstantinos Nikitopoulos (IEEE Open J. Commun. Soc., 2025)