89 citations · 138 across the 12 of their papers we have counts for
13 papers
Cooperative Sense and Avoid for UAVs using Secondary Radar
Mostafa Mohammadkarimi, Raj Thilak Rajan
A cooperative Sense and Avoid (SAA) algorithm for safe navigation of small-sized UAVs within an airspace is proposed in this paper. The proposed method relies upon cooperation betw…
Low Complexity Time Synchronization for Zero-padding based Waveforms
Koosha Pourtahmasi Roshandeh, Mostafa Mohammadkarimi, Masoud Ardakani
The discussion on using zero padding (ZP) instead of a cyclic prefix (CP) for enhancing channel estimation and equalization performance is a recurring topic in waveform design for…
Maximum Likelihood Time Synchronization for Zero-padded OFDM
Koosha Pourtahmasi Roshandeh, Mostafa Mohammadkarimi, Masoud Ardakani
Existing Orthogonal Frequency-Division Multiplexing (OFDM) variants based on cyclic prefix (CP) allow for efficient time synchronization, but suffer from lower power efficiency com…
Activity Detection for Grant-Free NOMA in Massive IoT Networks
Mehrtash Mehrabi, Mostafa Mohammadkarimi, Masoud Ardakani
Recently, grant-free transmission paradigm has been introduced for massive Internet of Things (IoT) networks to save both time and bandwidth and transmit the message with low laten…
Artificial Potential Field-Based Path Planning for Cluttered Environments
Mosab Diab, Mostafa Mohammadkarimi, Raj Thilak Rajan
In this paper, we study path planning algorithms of resource constrained mobile agents in unknown cluttered environments, which include but are not limited to various terrestrial m…
Joint Ranging and Phase Offset Estimation for Multiple Drones using ADS-B Signatures
Mostafa Mohammadkarimi, Geert Leus, Raj Thilak Rajan
A new method for joint ranging and Phase Offset (PO) estimation of multiple drones/aircrafts is proposed in this paper. The proposed method employs the superimposed uncoordinated A…
Efficient Massive Machine Type Communication (mMTC) via AMP
Mostafa Mohammadkarimi, Masoud Ardakani
We propose efficient and low-complexity multiuser detection (MUD) algorithms for Gaussian multiple access channel (G-MAC) for short-packet transmission in massive machine type comm…
Massive Uncoordinated Multiple Access for Beyond 5G
Mostafa Mohammadkarimi, Octavia A. Dobre, Moe Z. Win
Existing wireless communication systems have been mainly designed to provide substantial gain in terms of data rates. However, 5G and Beyond will depart from this scheme, with the…
An Approximate Maximum Likelihood Time Synchronization Algorithm for Zero-padded OFDM in Channels with Impulsive Gaussian Noise
Koosha Pourtahmasi Roshandeh, Mostafa Mohammadkarimi, Masoud Ardakani
In wireless communication systems, Orthogonal Frequency-Division Multiplexing (OFDM) includes variants using either a cyclic prefix (CP) or a zero padding (ZP) as the guard interva…
Decision Directed Channel Estimation Based on Deep Neural Network k-step Predictor for MIMO Communications in 5G
Mehrtash Mehrabi, Mostafa Mohammadkarimi, Masoud Ardakani +1
We consider the use of deep neural network (DNN) to develop a decision-directed (DD)-channel estimation (CE) algorithm for multiple-input multiple-output (MIMO)-space-time block co…
Signature-based Non-orthogonal Multiple Access (S-NOMA) for Massive Machine-Type Communications in 5G
Mostafa Mohammadkarimi, Muhammad Ahmad Raza, Octavia A. Dobre
The problem of providing massive connectivity in Internet-of-Things (IoT) with a limited number of available resources motivates the non-orthogonal multiple access (NOMA) solutions…
Deep Learning Based Sphere Decoding
Mostafa Mohammadkarimi, Mehrtash Mehrabi, Masoud Ardakani +1
In this paper, a deep learning (DL)-based sphere decoding algorithm is proposed, where the radius of the decoding hypersphere is learned by a deep neural network (DNN). The perform…
Doppler Spread Estimation in MIMO Frequency-selective Fading Channels
Mostafa Mohammadkarimi, Ebrahim Karami, Octavia A. Dobre +1
One of the main challenges in high-speed mobile communications is the presence of large Doppler spreads. Thus, accurate estimation of maximum Doppler spread (MDS) plays an importan…