101 citations · 167 across the 7 of their papers we have counts for
7 papers
A New Radio to Overcome Critical Link Budgets
Ralf R. Müller
We propose Multi-Antenna (MA) Towards Inband Shift Keying (TISK): a new multi-carrier radio concept to cope with critical link budgets. In contrast to common proposals that rely on…
Large-System Analysis of Joint User Selection and Vector Precoding with Zero-Forcing Transmit Beamforming for MIMO Broadcast Channels
Keigo Takeuchi, Ralf R. Mueller, Tsutomu Kawabata
Multiple-input multiple-output (MIMO) broadcast channels (BCs) (MIMO-BCs) with perfect channel state information (CSI) at the transmitter are considered. As joint user selection (U…
Vector Precoding for Gaussian MIMO Broadcast Channels: Impact of Replica Symmetry Breaking
Benjamin Zaidel, Ralf Mueller, Aris Moustakas +1
The so-called "replica method" of statistical physics is employed for the large system analysis of vector precoding for the Gaussian multiple-input multiple-output (MIMO) broadcast…
Asynchronous CDMA Systems with Random Spreading-Part I: Fundamental Limits
Laura Cottatellucci, Ralf R. Mueller, Merouane Debbah
Spectral efficiency for asynchronous code division multiple access (CDMA) with random spreading is calculated in the large system limit allowing for arbitrary chip waveforms and fr…
Asynchronous CDMA Systems with Random Spreading-Part II: Design Criteria
Laura Cottatellucci, Ralf R. Mueller, Merouane Debbah
Totally asynchronous code-division multiple-access (CDMA) systems are addressed. In Part I, the fundamental limits of asynchronous CDMA systems are analyzed in terms of spectral ef…
Channel and Multiuser Diversities in Wireless Systems: Delay-Energy Tradeoff
Prasanna Chaporkar, Kimmo Kansanen, Ralf R. Müller
We consider a communication system with multi-access fading channel. Each user in the system requires certain rate guarantee. Our main contribution is to devise a scheduling scheme…
Vector Precoding for Wireless MIMO Systems: A Replica Analysis
Ralf R. Mueller, Dongning Guo, Aris L. Moustakas
We apply the replica method to analyze vector precoding, a method to reduce transmit power in antenna array communications. The analysis applies to a very general class of channel…