69 citations · 252 across the 66 of their papers we have counts for
9 papers · 2 filters
Quantizers with Parameterized Distortion Measures
Jun Guo, Philipp Walk, Hamid Jafarkhani
In many quantization problems, the distortion function is given by the Euclidean metric to measure the distance of a source sample to any given reproduction point of the quantizer.…
Novel Time Asynchronous NOMA schemes for Downlink Transmissions
Mehdi Ganji, Hamid Jafarkhani
In this work, we investigate the effect of time asynchrony in non-orthogonal multiple access (NOMA) schemes for downlink transmissions. First, we analyze the benefit of adding inte…
Low-Complexity Reconfigurable MIMO for Millimeter Wave Communications
Biao He, Hamid Jafarkhani
The performance of millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems is limited by the sparse nature of propagation channels and the restricted number of radio…
Interleaving Channel Estimation and Limited Feedback for Point-to-Point Systems with a Large Number of Transmit Antennas
Erdem Koyuncu, Xun Zou, Hamid Jafarkhani
We introduce and investigate the opportunities of multi-antenna communication schemes whose training and feedback stages are interleaved and mutually interacting. Specifically, unl…
A High-Diversity Transceiver Design for MISO Broadcast Channels
Junyeong Seo, Youngchul Sung, Hamid Jafarkhani
In this paper, the outage behavior and diversity order of the mixture transceiver architecture for multiple-input single-output broadcast channels are analyzed. The mixture scheme…
An Analysis of Two-User Uplink Asynchronous Non-Orthogonal Multiple Access Systems
Xun Zou, Biao He, Hamid Jafarkhani
Recent studies have numerically demonstrated the possible advantages of the asynchronous non-orthogonal multiple access (ANOMA) over the conventional synchronous non-orthogonal mul…
On the Sub-Packetization Size and the Repair Bandwidth of Reed-Solomon Codes
Weiqi Li, Zhiying Wang, Hamid Jafarkhani
Reed-Solomon (RS) codes are widely used in distributed storage systems. In this paper, we study the repair bandwidth and sub-packetization size of RS codes. The repair bandwidth is…
Millimeter Wave Communications with Reconfigurable Antennas
Biao He, Hamid Jafarkhani
The highly sparse nature of propagation channels and the restricted use of radio frequency (RF) chains at transceivers limit the performance of millimeter wave (mmWave) multiple-in…
A New Reconfigurable Antenna MIMO Architecture for mmWave Communication
Mojtaba Ahmadi Almasi, Hani Mehrpouyan, Vida Vakilian +2
The large spectrum available in the millimeter-Wave (mmWave) band has emerged as a promising solution for meeting the huge capacity requirements of the 5th generation (5G) wireless…