114 citations · 181 across the 31 of their papers we have counts for
34 papers
A mmWave Software-Defined Array Platform for Wireless Experimentation at 24-29.5 GHz
Ashwini Pondeycherry Ganesh, Anthony Perre, Alphan Sahin +2
Advanced millimeter-wave software-defined array (SDA) platforms, or testbeds at affordable costs and high performance are essential for the wireless community. In this paper, we pr…
A Self-Healing Mesh Network without Global-Time Synchronization
Alphan Şahin, Hüseyin Arslan
In this paper, we propose a slot-based protocol that does not rely on global-time synchronization to achieve a self-healing mesh network. With the proposed protocol, each node sync…
Majority Vote Computation With Complementary Sequences for Distributed UAV Guidance
Alphan Sahin, Xiaofeng Wang
This study introduces a novel non-coherent over-the-air computation (OAC) scheme aimed at achieving reliable majority vote (MV) calculations in fading channels. The proposed approa…
Wireless Federated -Means Clustering with Non-coherent Over-the-Air Computation
Alphan Sahin
In this study, we propose using an over-the-air computation (OAC) scheme for the federated k-means clustering algorithm to reduce the per-round communication latency when it is imp…
A Millimeter-Wave Software-Defined Radio for Wireless Experimentation
Alphan Şahin, Mihail L. Sichitiu, İsmail Guvenç
In this study, we propose a low-cost and portable millimeter-wave software-defined radio (SDR) for wireless experimentation in the 60 GHz band. The proposed SDR uses Xilinx RFSoC2x…
Distributed Learning over a Wireless Network with Non-coherent Majority Vote Computation
Alphan Sahin
In this study, we propose an over-the-air computation (OAC) scheme to calculate the majority vote (MV) for federated edge learning (FEEL). With the proposed approach, edge devices…
A Survey on Over-the-Air Computation
Alphan Sahin, Rui Yang
Communication and computation are often viewed as separate tasks. This approach is very effective from the perspective of engineering as isolated optimizations can be performed. Ho…
Over-the-Air Computation Based on Balanced Number Systems for Federated Edge Learning
Alphan Sahin
In this study, we propose a digital over-the-air computation (OAC) scheme for achieving continuous-valued (analog) aggregation for federated edge learning (FEEL). We show that the…
Over-the-Air Computation over Balanced Numerals
Alphan Sahin, Rui Yang
In this study, a digital over-the-air computation (OAC) scheme for achieving continuous-valued gradient aggregation is proposed. It is shown that the average of a set of real-value…
A Demonstration of Over-the-Air Computation for Federated Edge Learning
Alphan Sahin
In this study, we propose a general-purpose synchronization method that allows a set of software-defined radios (SDRs) to transmit or receive any in-phase/quadrature data with prec…
Chirp-Based Over-the-Air Computation for Long-Range Federated Edge Learning
Safi Shams Muhtasimul Hoque, Mohammad Hassan Adeli, Alphan Sahin
In this study, we propose circularly-shifted chirp (CSC)-based majority vote (MV) (CSC-MV), a power-efficient over-the-air computation (OAC) scheme, to achieve long-range federated…
Multi-cell Non-coherent Over-the-Air Computation for Federated Edge Learning
Mohammad Hassan Adeli, Alphan Sahin
In this paper, we propose a framework where over-the-air computation (OAC) occurs in both uplink (UL) and downlink (DL), sequentially, in a multi-cell environment to address the la…
Over-the-Air Computation with DFT-spread OFDM for Federated Edge Learning
Alphan Sahin, Bryson Everette, Safi Shams Muhtasimul Hoque
In this study, we propose an over-the-air computation (AirComp) scheme for federated edge learning (FEEL) without channel state information (CSI) at the edge devices (EDs) or the e…
Distributed Learning over a Wireless Network with FSK-Based Majority Vote
Alphan Sahin, Bryson Everette, Safi Shams Muhtasimul Hoque
In this study, we propose an over-the-air computation (AirComp) scheme for federated edge learning (FEEL). The proposed scheme relies on the concept of distributed learning by majo…
Index Modulation with Circularly-Shifted Chirps for Dual-Function Radar and Communications
Alphan Sahin, Safi Shams Muhtasimul Hoque, Chao-Yu Chen
In this study, we propose index modulation (IM) with circularly-shifted chirps (CSCs) (CSC-IM) for dual-function radar and communication (DFRC) systems. The proposed scheme encodes…
Encoding and Decoding with Partitioned Complementary Sequences for Low-PAPR OFDM
Alphan Sahin
In this study, we propose partitioned complementary sequences (CSs) where the gaps between the clusters encode information bits to achieve low peak-to-average-power ratio (PAPR) or…
Wideband Index Modulation with Circularly-Shifted Chirps
Safi Shams Muhtasimul Hoque, Chao-Yu Chen, Alphan Sahin
In this study, we propose a wideband index modulation (IM) based on circularly-shifted chirps. To derive the proposed method, we first prove that a Golay complementary pair (GCP) c…
Index-Modulated Circularly-Shifted Chirps for Dual-Function Radar & Communication Systems
Safi Shams Muhtasimul Hoque, Alphan Sahin
In this study, we analyze index modulation (IM) based on circularly-shifted chirps (CSCs) for dual-function radar & communication (DFRC) systems. We develop a maximum likelihood (M…
DFT-spread-OFDM Based Chirp Transmission
Alphan Sahin, Nozhan Hosseini, Hosseinali Jamal +2
In this study, we propose a framework for chirp-based communications by exploiting discrete Fourier transform-spread orthogonal frequency division multiplexing (DFT-s-OFDM). We sho…
RL-Based Interference Mitigation in Uncoordinated Networks with Partially Overlapping Tones
Mrugen Deshmukh, Md Moin Uddin Chowdhury, Sung Joon Maeng +2
Partially-overlapping tones (POT) are known to help mitigate co-channel interference in uncoordinated multi-carrier networks by introducing intentional frequency offsets (FOs) to t…
Golay Layer: Limiting Peak-to-Average Power Ratio for OFDM-based Autoencoders
Alphan Sahin, David W. Matolak
In this study, we propose a differentiable layer for OFDM-based autoencoders (OFDM-AEs) to avoid high instantaneous power without regularizing the cost function used during the tra…
An Uplink Control Channel Design with Complementary Sequences for Unlicensed Bands
Alphan Sahin, Rui Yang
In this paper, two modulation schemes based on complementary sequences (CSs) are proposed for uplink control channels in unlicensed bands. These schemes address high peak-to-averag…
Low-PAPR Multi-channel OOK Waveform for IEEE 802.11ba Wake-up Radio
Alphan Sahin, Xiaofei Wang, Hanqing Lou +1
The peak-to-average-power ratio (PAPR) of the frequency domain multiplexed wake-up signals (WUSs) specified in IEEE P802.11ba can be very large and difficult to manage since it dep…
A Reliable Uplink Control Channel Design with Complementary Sequences
Alphan Şahin, Rui Yang
In this study, we propose two schemes for uplink control channels based on non-contiguous complementary sequences (CSs) where the peak-to-average-power ratio (PAPR) of the resultin…