2.7k citations · 2.7k across the 3 of their papers we have counts for
8 papers
Channel Estimation and Hybrid Precoding for Millimeter Wave Cellular Systems
Ahmed Alkhateeb, Omar El Ayach, Geert Leus +1
Millimeter wave (mmWave) cellular systems will enable gigabit-per-second data rates thanks to the large bandwidth available at mmWave frequencies. To realize sufficient link margin…
Spatially Sparse Precoding in Millimeter Wave MIMO Systems
Omar El Ayach, Sridhar Rajagopal, Shadi Abu-Surra +2
Millimeter wave (mmWave) signals experience orders-of-magnitude more pathloss than the microwave signals currently used in most wireless applications. MmWave systems must therefore…
Interference Alignment in Distributed Antenna Systems
Jonathan Starr, Omar El Ayach, Robert W. Heath
Interference alignment (IA) is a cooperative transmission strategy that improves spectral efficiency in high signal-to-noise ratio (SNR) environments, yet performs poorly in low-SN…
The Practical Challenges of Interference Alignment
Omar El Ayach, Steven W. Peters, Robert W. Heath
Interference alignment (IA) is a revolutionary wireless transmission strategy that reduces the impact of interference. The idea of interference alignment is to coordinate multiple…
On the Overhead of Interference Alignment: Training, Feedback, and Cooperation
Omar El Ayach, Angel Lozano, Robert W. Heath
Interference alignment (IA) is a cooperative transmission strategy that, under some conditions, achieves the interference channel's maximum number of degrees of freedom. Realizing…
Grassmannian Differential Limited Feedback for Interference Alignment
Omar El Ayach, Robert W. Heath
Channel state information (CSI) in the interference channel can be used to precode, align, and reduce the dimension of interference at the receivers, to achieve the channel's maxim…