125 citations · 946 across the 54 of their papers we have counts for
30 papers · 1 filter
Deterministic Pilot Design and Channel Estimation for Downlink Massive MIMO-OTFS Systems in Presence of the Fractional Doppler
Ding Shi, Wenjin Wang, Li You +4
Although the combination of the orthogonal time frequency space (OTFS) modulation and the massive multiple-input multiple-output (MIMO) technology can make communication systems pe…
CNN aided Weighted Interpolation for Channel Estimation in Vehicular Communications
Abdul Karim Gizzini, Marwa Chafii, Ahmad Nimr +2
IEEE 802.11p standard defines wireless technology protocols that enable vehicular transportation and manage traffic efficiency. A major challenge in the development of this technol…
Task-Based Analog-to-Digital Converters
Peter Neuhaus, Nir Shlezinger, Meik Dörpinghaus +2
Obtaining digital representations of multivariate continuous-time (CT) signals is a challenge encountered in many signal processing systems. In practice, these signals are often ac…
Zero Crossing Modulation for Communication with Temporally Oversampled 1-Bit Quantization
Gerhard Fettweis, Meik Dörpinghaus, Sandra Bender +3
Today's communication systems typically use high resolution analog-to-digital converters (ADCs). However, considering future communication systems with data rates in the order of 1…
Time-Domain Multi-Beam Selection and Its Performance Improvement for mmWave Systems
Hsiao-Lan Chiang, Wolfgang Rave, Gerhard Fettweis
Multi-beam selection is one of the crucial technologies in hybrid beamforming systems for frequency-selective fading channels. Addressing the problem in the frequency domain facili…
Secrecy Energy Efficiency of MIMOME Wiretap Channels with Full-Duplex Jamming
Omid Taghizadeh, Peter Neuhaus, Rudolf Mathar +1
Full-duplex (FD) jamming transceivers are recently shown to enhance the information security of wireless communication systems by simultaneously transmitting artificial noise (AN)…
Sequential Hybrid Beamforming Design for Multi-Link mmwave Communication
Yaning Zou, Mario Castañeda, Tommy Svensson +1
In this paper, we propose a sequential hybrid beamforming design for multi-link transmission over mmwave frequency bands. As a starting point, a baseline data communication link is…
Impact of Major RF Impairments on mm-wave Communications using OFDM Waveforms
Yaning Zou, Per Zetterberg, Ulf Gustavsson +5
In this paper, we study the joint impact of three major RF im-pairments, namely, oscillator phase noise, power amplifier non-linearity and I/Q imbalance on the performance of a mm-…
Analog Beamsteering for Flexible Hybrid Beamforming Design in Mmwave Communications
Yaning Zou, Wolfgang Rave, Gerhard Fettweis
In this paper, we propose an analog beamsteering approach for enabling flexible hybrid beamforming design that can achieve performance close to singular value decomposition (SVD) b…
Unifying Message Passing Algorithms Under the Framework of Constrained Bethe Free Energy Minimization
Dan Zhang, Xiaohang Song, Wenjin Wang +2
Variational message passing (VMP), belief propagation (BP) and expectation propagation (EP) have found their wide applications in complex statistical signal processing problems. In…
How Reliable and Capable is Multi-Connectivity?
Albrecht Wolf, Philipp Schulz, Meik Dörpinghaus +2
Multi-connectivity (MCo) is considered to be a key strategy for enabling reliable transmissions and enhanced data rates in fifth-generation mobile networks, as it provides multiple…
On the Binary Lossless Many-Help-One Problem with Independently Degraded Helpers
Albrecht Wolf, Diana Cristina González, Meik Dörpinghaus +2
Although the rate region for the lossless many-help-one problem with independently degraded helpers is already "solved", its solution is given in terms of a convex closure over a s…
On the Achievable Rate of Bandlimited Continuous-Time AWGN Channels with 1-Bit Output Quantization
Sandra Bender, Meik Dörpinghaus, Gerhard Fettweis
We consider a continuous-time bandlimited additive white Gaussian noise channel with 1-bit output quantization. On such a channel the information is carried by the temporal distanc…
Two-Level Spatial Multiplexing using Hybrid Beamforming Antenna Arrays for mmWave Communications
Xiaohang Song, Nithin Babu, Wolfgang Rave +2
In this work, we consider a two-level hierarchical MIMO antenna array system, where each antenna of the upper level is made up of a subarray on the lower one. The concept of spatia…
Information Rates for Faster-Than-Nyquist Signaling with 1-Bit Quantization and Oversampling at the Receiver
Tim Hälsig, Lukas Landau, Gerhard Fettweis
Oversampling combined with low quantization resolutions has been shown to be a viable option when aiming for energy efficiency in multigigabit/s communications systems. This work c…
Spectral Efficient Communications employing 1-Bit Quantization and Oversampling at the Receiver
Tim Hälsig, Lukas Landau, Gerhard Fettweis
To relax power consumption requirements in multigigabit/s communications systems low resolution quantization can be used. Information-theoretic results have shown that systems empl…
GFDM - A Framework for Virtual PHY Services in 5G Networks
Ivan Gaspar, Luciano Mendes, Maximilian Matthé +4
The next generation of wireless networks will face different challenges from new scenarios. The main contribution of this paper is to show that Generalized Frequency Division Multi…
GFDM Transceiver using Precoded Data and Low-complexity Multiplication in Time Domain
Ivan Gaspar, Maximilian Matthé, Nicola Michailow +3
Future wireless communication systems are demanding a more flexible physical layer. GFDM is a block filtered multicarrier modulation scheme proposed to add multiple degrees of free…
Conjugate-Root Offset-QAM for Orthogonal Multicarrier Transmission
Maximilian Matthé, Gerhard Fettweis
Current implementations of OFDM/OQAM are restricted to band-limited symmetric filters. To circumvent this, non-symmetric conjugate root (CR) filters are proposed for OQAM modulatio…
Reduced Complexity Calculation of LMMSE Filter Coefficients for GFDM
Maximilian Matthé, Ivan Gaspar, Dan Zhang +1
A low-complexity algorithm for calculation of the LMMSE filter coefficients for GFDM in a block-fading multipath environment is derived in this letter. The simplification is based…
Distributed Asynchronous Optimization Framework for the MISO Interference Channel
Stefan Wesemann, Gerhard Fettweis
We study the distributed optimization of transmit strategies in a multiple-input, single-output (MISO) interference channel (IFC). Existing distributed algorithms rely on stricly s…
5GNOW: Challenging the LTE Design Paradigms of Orthogonality and Synchronicity
Gerhard Wunder, Martin Kasparick, Stephan ten Brink +13
LTE and LTE-Advanced have been optimized to deliver high bandwidth pipes to wireless users. The transport mechanisms have been tailored to maximize single cell performance by enfor…
Framework for Link-Level Energy Efficiency Optimization with Informed Transmitter
Christian Isheden, Zhijiat Chong, Eduard Jorswieck +1
The dramatic increase of network infrastructure comes at the cost of rapidly increasing energy consumption, which makes optimization of energy efficiency (EE) an important topic. S…
On the Transmission-Computation-Energy Tradeoff in Wireless and Fixed Networks
P. Rost, G. Fettweis
In this paper, a framework for the analysis of the transmission-computation-energy tradeoff in wireless and fixed networks is introduced. The analysis of this tradeoff considers bo…