Power Minimization in Parallel Vector Broadcast Channels with Zero-Forcing Beamforming. - Christoph Hellings; Michael Joham; Wolfgang Utschick (GLOBECOM, 2010)

QoS feasibility for the MIMO broadcast channel: Robust formulation and multi-carrier systems. - Michael Joham; Christoph Hellings; Raphael Hunger (WiOpt, 2010)

Power minimization in parallel vector broadcast channels with separate linear precoding. - Christoph Hellings; Wolfgang Utschick; Michael Joham (EUSIPCO, 2011)

Carrier-cooperative transmission in parallel MIMO broadcast channels: Potential gains and algorithms. - Christoph Hellings; Wolfgang Utschick (ISWCS, 2011)

Gradient-based rate balancing for MIMO broadcast channels with linear precoding. - Christoph Hellings; Michael Joham; Wolfgang Utschick (WSA, 2011)

On the Inseparability of Parallel MIMO Broadcast Channels With Linear Transceivers. - Christoph Hellings; Wolfgang Utschick (IEEE Trans. Signal Process., 2011)

Carrier-cooperative zero-forcing for power minimization in parallel MIMO broadcast channels. - Stephan Herrmann 003; Christoph Hellings; Wolfgang Utschick (ACSCC, 2012)

Energy-efficient rate balancing in vector broadcast channels with linear transceivers. - Christoph Hellings; Wolfgang Utschick (ISWCS, 2012)

Rate prediction and receding horizon power minimization in block-fading broadcast channels. - Christoph Hellings; Paskal Kiefer; Wolfgang Utschick (SPAWC, 2012)

Energy-efficient zero-forcing with user selection in parallel vector broadcast channels. - Christoph Hellings; Nesrine Damak; Wolfgang Utschick (WSA, 2012)

Minimal Transmit Power in Parallel Vector Broadcast Channels With Linear Precoding. - Christoph Hellings; Michael Joham; Maximilian Riemensberger; Wolfgang Utschick (IEEE Trans. Signal Process., 2012)

Gradient-Based Power Minimization in MIMO Broadcast Channels With Linear Precoding. - Christoph Hellings; Michael Joham; Wolfgang Utschick (IEEE Trans. Signal Process., 2012)

Ergodic robust rate balancing for rank-one vector broadcast channels via sequential approximations. - Andreas Gründinger; David Leiner; Michael Joham; Christoph Hellings; Wolfgang Utschick (ICASSP, 2013)

Performance gains due to improper signals in MIMO broadcast channels with widely linear transceivers. - Christoph Hellings; Wolfgang Utschick (ICASSP, 2013)

Three Kinds of Inseparability in Parallel MIMO Broadcast Channels with Linear Transceivers. - Christoph Hellings; Wolfgang Utschick (ISWCS, 2013)

Energy efficiency optimization in the multiantenna downlink with linear transceivers. - Christoph Hellings; Wolfgang Utschick (PIMRC, 2013)

Energy efficiency optimization in MIMO broadcast channels with fairness constraints. - Christoph Hellings; Wolfgang Utschick (SPAWC, 2013)

Linear Precoding in Parallel MIMO Broadcast Channels: Separable and Inseparable Scenarios. - Christoph Hellings; Wolfgang Utschick (WSA, 2013)

QoS Feasibility in MIMO Broadcast Channels With Widely Linear Transceivers. - Christoph Hellings; Michael Joham; Wolfgang Utschick (IEEE Signal Process. Lett., 2013)

Carrier Cooperation Can Reduce the Transmit Power in Parallel MIMO Broadcast Channels With Zero-Forcing. - Christoph Hellings; Stephan Herrmann 003; Wolfgang Utschick (IEEE Trans. Signal Process., 2013)

On carrier-cooperation in parallel Gaussian MIMO relay channels with partial decode-and-forward. - Christoph Hellings; Wolfgang Utschick (ACSSC, 2014)

Optimality of proper signaling in Gaussian MIMO broadcast channels with shaping constraints. - Christoph Hellings; Lorenz Weiland; Wolfgang Utschick (ICASSP, 2014)

A Deterministic Initialization for Optimizing Carrier-Cooperative Transmit Strategies. - Christoph Hellings; Stephan Herrmann 003; Wolfgang Utschick (WSA, 2014)

The Optimal Input Distribution for Partial Decode-and-Forward in the MIMO Relay Channel. - Lennart Gerdes; Christoph Hellings; Lorenz Weiland; Wolfgang Utschick (CoRR, 2014)

On Optimal Gaussian Signaling in MIMO Relay Channels With Partial Decode-and-Forward. - Christoph Hellings; Lennart Gerdes; Lorenz Weiland; Wolfgang Utschick (IEEE Trans. Signal Process., 2014)

Composite real principal component analysis of complex signals. - Christoph Hellings; Patrick Gogler; Wolfgang Utschick (EUSIPCO, 2015)

Two different real representations of complex matrices for describing widely linear systems. - Christoph Hellings; Wolfgang Utschick (ISWCS, 2015)

Separability of parallel Gaussian MIMO broadcast channels with shaping constraints. - Christoph Hellings; Wolfgang Utschick (SPAWC, 2015)

An Impropriety Test Based on Block-Skew-Circulant Matrices. - Christoph Hellings; Michael Koller 001; Wolfgang Utschick (WSA, 2015)

On the Maximum Achievable Partial Decode-and-Forward Rate for the Gaussian MIMO Relay Channel. - Lennart Gerdes; Christoph Hellings; Lorenz Weiland; Wolfgang Utschick (IEEE Trans. Inf. Theory, 2015)

Block-Skew-Circulant Matrices in Complex-Valued Signal Processing. - Christoph Hellings; Wolfgang Utschick (IEEE Trans. Signal Process., 2015)

Close-to-Optimal Partial Decode-and-Forward Rate in the MIMO Relay Channel via Convex Programming. - Thomas Wiegart; Christoph Hellings; Wolfgang Utschick (WSA, 2016)

On the Worst-Case Noise in Gaussian MIMO Systems with Proper and with Improper Signaling. - Christoph Hellings; Wolfgang Utschick (WSA, 2017)

Improper Signaling Versus Time-Sharing in the SISO Z-Interference Channel. - Christoph Hellings; Wolfgang Utschick (IEEE Commun. Lett., 2017)

Machine Learning for Channel Estimation from Compressed Measurements. - Michael Koller 001; Christoph Hellings; Michael Knoedlseder; Thomas Wiese; David Neumann; Wolfgang Utschick (ISWCS, 2018)

Capacity of the Two-User MIMO Broadcast Channel Under a Shaping Constraint in Closed Form. - Christoph Hellings; Patrick Gest; Wolfgang Utschick (SPAWC, 2018)

Proper Time-Sharing as a Baseline for Studying Improper Signaling in Interference Channels. - Christoph Hellings; Wolfgang Utschick (WSA, 2018)

Reduced-Entropy Signals in MIMO Communication Systems (Signale mit reduzierter Entropie in MIMO-Kommunikationssystemen) - Christoph Hellings (2018)

Globally Optimal TIN Strategies with Time-Sharing in the MISO Interference Channel. - Christoph Hellings; Bho Matthiesen; Eduard A. Jorswieck; Wolfgang Utschick (EUSIPCO, 2019)

Combining Linear Estimation with Scalar Widely Linear Estimation. - Christoph Hellings; Wolfgang Utschick (ICASSP, 2019)

Learning-Based Channel Estimation for Various Antenna Array Configurations. - Michael Koller 001; Christoph Hellings; Wolfgang Utschick (SPAWC, 2019)

Energy Efficiency: Rate Splitting vs. Point-to-Point Codes in Gaussian Interference Channels. - Bho Matthiesen; Christoph Hellings; Eduard A. Jorswieck (SPAWC, 2019)

Evaluation of Neural-Network-Based Channel Estimators Using Measurement Data. - Christoph Hellings; Aymen Dehmani; Stefan Wesemann; Michael Koller 001; Wolfgang Utschick (WSA, 2019)

Two-User SIMO Interference Channel with TIN: Improper Signaling versus Time-Sharing. - Christoph Hellings; Ferhad Askerbeyli; Wolfgang Utschick (CoRR, 2019)

Measuring impropriety in complex and real representations. - Christoph Hellings; Wolfgang Utschick (Signal Process., 2019)

Minimax Solution to the Partial Decode-and-Forward Rate Maximization in the MIMO Relay Channel. - Christoph Hellings; Yushu Yang; Wolfgang Utschick (WSA, 2020)

Improper Signaling Versus Time-Sharing in the Two-User Gaussian Interference Channel With TIN. - Christoph Hellings; Wolfgang Utschick (IEEE Trans. Inf. Theory, 2020)

Two-User SIMO Interference Channel With Treating Interference as Noise: Improper Signaling Versus Time-Sharing. - Christoph Hellings; Ferhad Askerbeyli; Wolfgang Utschick (IEEE Trans. Signal Process., 2020)

Mixed Monotonic Programming for Fast Global Optimization. - Bho Matthiesen; Christoph Hellings; Eduard A. Jorswieck; Wolfgang Utschick (IEEE Trans. Signal Process., 2020)

Improper Signaling Versus Time-Sharing in the MISO Z-Interference Channel. - Ferhad Askerbeyli; Christoph Hellings; Wolfgang Utschick (IEEE Commun. Lett., 2021)

Maximizing the Partial Decode-and-Forward Rate in the Gaussian MIMO Relay Channel. - Christoph Hellings; Patrick Gest; Thomas Wiegart; Wolfgang Utschick (IEEE Trans. Signal Process., 2021)