57 citations · 134 across the 16 of their papers we have counts for
17 papers
Direct Uplink Connectivity in Space MIMO Systems with THz and FSO Inter-Satellite Links
Zohre Mashayekh Bakhsh, Yasaman Omid, Gaojie Chen +3
This paper investigates uplink transmission from a single-antenna mobile phone to a cluster of satellites, emphasizing the role of inter-satellite links (ISLs) in facilitating coop…
Multi-Satellite MIMO Systems for Direct User-Satellite Communications: A Survey
Zohre Mashayekh Bakhsh, Yasaman Omid, Gaojie Chen +3
Advancements in satellite technology have made direct-to-device connectivity a viable solution for ensuring global access. This method is designed to provide internet connectivity…
Space MIMO: Direct Unmodified Handheld to Multi-Satellite Communication
Yasaman Omid, Zohre Mashayekh Bakhsh, Farbod Kayhan +2
This paper examines the uplink transmission of a single-antenna handsheld user to a cluster of satellites, with a focus on utilizing the inter-satellite links to enable cooperative…
An Approximate Solution for Symbol-Level Multiuser Precoding Using Support Recovery
Alireza Haqiqatnejad, Farbod Kayhan, Bjorn Ottersten
In this paper, we propose a low-complexity method to approximately solve the SINR-constrained optimization problem of symbol-level precoding (SLP). First, assuming a generic modula…
Robust SINR-Constrained Symbol-Level Multiuser Precoding with Imperfect Channel Knowledge
Alireza Haqiqatnejad, Farbod Kayhan, Bjorn Ottersten
In this paper, we address robust design of symbol-level precoding for the downlink of multiuser multiple-input multiple-output wireless channels, in the presence of imperfect chann…
Power Minimizer Symbol-Level Precoding: A Closed-Form Sub-Optimal Solution
A. Haqiqatnejad, F. Kayhan, B. Ottersten
In this letter, we study the optimal solution of the multiuser symbol-level precoding (SLP) for minimization of the total transmit power under given signal-to-interference-plus-noi…
Code Design for Non-Coherent Detection of Frame Headers in Precoded Satellite Systems
Farbod Kayhan, Guido Montorsi
In this paper we propose a simple method for generating short-length rate-compatible codes over that are robust to non-coherent detection for -PSK constellations.…
Robust Design of Power Minimizing Symbol-Level Precoder under Channel Uncertainty
Alireza Haqiqatnejad, Farbod Kayhan, Bjorn Ottersten
In this paper, we investigate the downlink transmission of a multiuser multiple-input single-output (MISO) channel under a symbol-level precoding (SLP) scheme, having imperfect cha…
Symbol-Level Precoding Design Based on Distance Preserving Constructive Interference Regions
Alireza Haqiqatnejad, Farbod Kayhan, Bjorn Ottersten
In this paper, we investigate the symbol-level precoding (SLP) design problem in the downlink of a multiuser multiple-input single-output (MISO) channel. We consider generic conste…
Symbol-Level Precoding Design for Max-Min SINR in Multiuser MISO Broadcast Channels
A. Haqiqatnejad, F. Kayhan, B. Ottersten
In this paper, we address the symbol level precoding (SLP) design problem under max-min SINR criterion in the downlink of multiuser multiple-input single-output (MISO) channels. Fi…
Low Complexity Two-Stage Soft/Hard Decoders
Guido Montorsi, Farbod Kayhan
Next generation wireless systems will need higher spectral efficiency as the expected traffic volumes per unit bandwidth and dimension will inevitably grow. As a consequence, it is…
On Low Complexity Detection for QAM Isomorphic Constellations
Farbod Kayhan
Despite of the known gap from the Shannon's capacity, several standards are still employing QAM or star shape constellations, mainly due to the existing low complexity detectors. I…
Constellation Design for Transmission over Nonlinear Satellite Channels
Farbod Kayhan, Guido Montorsi
In this paper we use a variation of simulated annealing algorithm for optimizing two-dimensional constellations with 32 signals. The main objective is to maximize the symmetric pra…
Constellation Design for Channels Affected by Phase Noise
Farbod Kayhan, Guido Montorsi
In this paper we optimize constellation sets to be used for channels affected by phase noise. The main objective is to maximize the achievable mutual information of the constellati…
Efficient data compression from statistical physics of codes over finite fields
Alfredo Braunstein, Farbod Kayhan, Riccardo Zecchina
In this paper we discuss a novel data compression technique for binary symmetric sources based on the cavity method over a Galois Field of order q (GF(q)). We present a scheme of l…
Efficient LDPC Codes over GF(q) for Lossy Data Compression
Alfredo Braunstein, Farbod Kayhan, Riccardo Zecchina
In this paper we consider the lossy compression of a binary symmetric source. We present a scheme that provides a low complexity lossy compressor with near optimal empirical perfor…
Encoding for the Blackwell Channel with Reinforced Belief Propagation
A. Braunstein, F. Kayhan, G. Montorsi +1
A key idea in coding for the broadcast channel (BC) is binning, in which the transmitter encode information by selecting a codeword from an appropriate bin (the messages are thus t…