31 citations · 68 across the 9 of their papers we have counts for
9 papers
Matrix Pencil-Based DoA Estimation for Hybrid Receivers in Snapshot-Limited Scenarios
Mona Mostafa, Ramy H. Gohary, Amr El-Keyi +1
The goal of this paper is to estimate the directions of arrival (DoAs) for hybrid analog/digital (HAD) receivers when the number of snapshots is too small for statistical averaging…
Optimal Power Assignment for MIMO Channels Under Joint Total and Per-Group Power Constraints
Mahdi Khojastehnia, Ioannis Lambadaris, Ramy H Gohary +1
In this paper we consider a communication system with one transmitter and one receiver. The transmit antennas are partitioned into disjoint groups, and each group must satisfy an a…
Multidimensional Constellations for Uplink SCMA Systems --- A Comparative Study
Monirosharieh Vameghestahbanati, Ian Marsland, Ramy H. Gohary +1
Sparse code multiple access (SCMA) is a class of non-orthogonal multiple access (NOMA) that is proposed to support uplink machine-type communication services. In an SCMA system, de…
Enabling Sphere Decoding for SCMA
Monirosharieh Vameghestahbanati, Ebrahim Bedeer, Ian Marsland +2
In this paper, we propose a reduced-complexity optimal modified sphere decoding (MSD) detection scheme for SCMA. As SCMA systems are characterized by a number of resource elements…
Polar Codes for SCMA Systems
Monirosharieh Vameghestahbanati, Ian Marsland, Ramy H. Gohary +1
In this paper, we design and compare multilevel polar coding (MLPC) and bit-interleaved polar coded modulation (BIPCM) for uplink sparse code multiple access (SCMA) systems that op…
Proactive Location-Based Scheduling of Delay-Constrained Traffic Over Fading Channels
Antonious M. Girgis, Amr El-Keyi, Mohammed Nafie +1
In this paper, proactive resource allocation based on user location for point-to-point communication over fading channels is introduced, whereby the source must transmit a packet w…
Optimum Transmission Through the Multiple-Antenna Gaussian Multiple Access Channel
Daniel Calabuig, Ramy H. Gohary, Halim Yanikomeroglu
This paper studies the optimal points in the capacity region of Gaussian multiple access channels (GMACs) with constant fading, multiple antennas and various power constraints. The…
Generalized Cross-Layer Designs for Generic Half-Duplex Multicarrier Wireless Networks with Frequency-Reuse
Rozita Rashtchi, Ramy H. Gohary, Halim Yanikomeroglu
In this paper, joint designs of data routes and resource allocations are developed for generic half-duplex multicarrier wireless networks in which each subcarrier can be reused by…
The capacity region of a product of two unmatched Gaussian broadcast channels with three particular messages and a common message
Ramy H. Gohary, Timothy N. Davidson
This paper considers a Gaussian broadcast channel with two unmatched degraded components, three particular messages, and a common message that is intended for all three receivers.…