49 citations · 133 across the 11 of their papers we have counts for
11 papers · 1 filter
Identification of GSM and LTE Signals Using Their Second-order Cyclostationarity
Ebrahim Karami, Octavia A. Dobre, Nikhil Adnani
Automatic signal identification (ASI) has various millitary and commercial applications, such as spectrum surveillance and cognitive radio. In this paper, a novel ASI algorithm is…
A Novel Detection Algorithm Efficient for Turbo coded CDMA Signals in Detect and Forward Cooperative Channels
Ebrahim Karami
In this paper, a new detection algorithm is proposed for turbo coded Code Division Multiple Access (CDMA) signals in detect and forward cooperative channels. Use of user cooperatio…
Performance Analysis of Decision Directed Maximum Likelihood MIMO Channel Tracking Algorithm
Ebrahim Karami
In this paper, the performance of decision directed (DD) maximum likelihood (ML) channel tracking algorithm is analyzed. The ML channel tracking algorithm presents efficient perfor…
Multisensor Data Fusion for Water Quality Monitoring using Wireless Sensor Networks
Ebrahim Karami, Francis M. Bui, Ha H. Nguyen
In this paper, the application of hierarchical wireless sensor networks in water quality monitoring is investigated. Adopting a hierarchical structure, the set of sensors is divide…
Identification of SM-OFDM and AL-OFDM Signals Based on Their Second-Order Cyclostationarity
Ebrahim Karami, Octavia Dobre
Automatic signal identification (ASI) has important applications to both commercial and military communications, such as software defined radio, cognitive radio, spectrum surveilla…
Cluster Size Optimization in Cooperative Spectrum Sensing
Ebrahim Karami, Amir H. Banihashemi
In this paper, we study and optimize the cooperation cluster size in cooperative spectrum sensing to maximize the throughput of secondary users (SUs). To calculate the effective th…
Stochastic Models of Coalition Games for Spectrum Sharing in Large Scale Interference Channels
Ebrahim Karami, Savo Glisic
In this paper, we present a framework for the analysis of self-organized distributed coalition formation process for spectrum sharing in interference channel for large-scale ad hoc…
Joint Optimization of Scheduling and Routing in Multicast Wireless Ad-Hoc Network Using Soft Graph Coloring and Non-linear Cubic Games
Ebrahim Karami, Savo Glisic
In this paper we present matrix game-theoretic models for joint routing, network coding, and scheduling problem. First routing and network coding are modeled by using a new approac…
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…
Low Complexity Time Domain Semi-Blind MIMO-OFDM Channel Estimation Using Adaptive Bussgang Algorithm
Ebrahim Karami, Markku Juntti
In this paper, a low complexity time domain semi-blind algorithm is proposed to estimate and track the time varying MIMO OFDM channels. First, the proposed least mean squares (LMS)…
Windowed Overlapped frequency-domain Block Filtering Approach for Direct Sequence Signal Acquisition
Ebrahim Karami, Harri Saarnisaari
This paper applies a windowed frequency-domain overlapped block filtering approach for the acquisition of direct sequence signals. The windows, as a novel viewpoint, not only allow…