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  • دکتری (1386)

    مهندسی برق

    دانشگاه کارلتون، اتاوا، کانادا

  • کارشناسی‌ارشد (1380)

    مهندسی برق - مخابرات

    دانشگاه صنعتی شریف، تهران، ایران

  • کارشناسی (1378)

    مهندسی برق - کنترل

    دانشگاه صنعتی شریف، ایران، تهران

  • تئوری اطلاعات و کدینگ، مخابرات بی سیم، تخصیص منابع در شبکه‌های مخابراتی
  • نوآوری سامانه های ارتباطی سیار

دکتر حمید سعیدی در سال 1357 در تهران، ایران متولد شد و با کسب رتبه 73 کشوری در آزمون سراسری سال 1374 در دوره کارشناسی مهندسی برق دانشگاه صنعتی شریف پذیرفته شد. پس از آن در سال 1380 مدرک کارشناسی ارشد خود را در مهندسی مخابرات از همان دانشگاه دریافت کرد و با دریافت بورس تحصیلی دانشگاه کارلتون در اتاوا برای ادامه تحصیل در دوره دكتري به کانادا رفت. وی در سال 1386 مدرک دکترای خود را دریافت کرد و همزمان به دلیل کیفیت بالای رساله دکتری برنده مدال سنای دانشگاه کارلتون شد. پس از گذراندن دوره پسادکتری در همان دانشگاه و سپس در دانشگاه ماساچوست آمریکا، به ایران بازگشت و از سال 1389تا 1395 به عنوان استادیار و از سال 1395 تا کنون به عنوان دانشیار در دانشکده مهندسی برق و کامپیوتر، دانشگاه تربیت مدرس مشغول به کار است. وی در سال 1396 به عنوان مدیر دفتر بین الملل دانشگاه تربیت مدرس منصوب شده است. زمینه های پژوهشی وی تئوری اطلاعات و کدینگ و مخابرات سیار است. دکتر سعیدی از سال 1393 تا 1397 عضو هیات تحریریه مجله IEEE COMMUNICATIONS LETTERS بوده و هم اکنون نیز عضو هیات تحریریه IEEE TRANSACTIONS on COMMUNICATIONS است.

ارتباط

رزومه

Multi-Purpose Drones for Coverage and Transport Applications

Mohammadjavad Khosravi, Saeede Enayati, Hamid Saeedi, Hossein Pishro-Nik
Journal PapersIEEE Transactions on Wireless Communications , 2021 February 2, {Pages }

Abstract

Unmanned aerial vehicles (UAVs) have become important in many applications including last-mile deliveries, surveillance and monitoring, and wireless networks. This paper aims to design UAV trajectories that simultaneously perform multiple tasks. We aim to design UAV trajectories that efficiently perform some transportation operation (e.g., package delivery), and at the same time provide uniform coverage over a neighborhood area which is needed for applications such as network coverage, Internet of Things (IoT) devices data collection, wireless power transfer, and surveillance. We first consider multi-task UAVs for a simplified scenario where the neighborhood area is a circular region where UAV missions start from the center and the destinat

E2E QoS Guarantee for the Tactile Internet via Joint NFV and Radio Resource Allocation

Narges Gholipoor, Hamid Saeedi, Nader Mokari, Eduard Jorswieck
Journal PapersIEEE Transactions on Network and Service Management , 2020 June 10, {Pages }

Abstract

The Tactile Internet (TI) is one of the next generation wireless network services with end to end (E2E) delay as low as 1 ms. Since this ultra low E2E delay cannot be met in the current 4G network architecture, it is necessary to investigate this service in the next generation wireless network by considering new technologies such as networks function virtualization (NFV). On the other hand, given the importance of E2E delay in the TI service, it is crucial to consider the delay of all parts of the network, including the radio access part and the NFV core part. In this paper, for the first time, we investigate the joint radio resource allocation (R-RA) and NFV resource allocation (NFV-RA) in a heterogeneous network where queuing delays, tran

Resource Management and Admission Control for Tactile Internet in Next Generation of Radio Access Network

Narges Gholipoor, Saeedeh Parsaeefard, Mohammad Reza Javan, Nader Mokari, Hamid Saeedi, Hossein Pishro-Nik
Journal PapersIEEE Access , Volume 8 , 2020 July 23, {Pages 136261-136277 }

Abstract

Tactile Internet (TI) is one of the main service types in 5G, which requires tight delay preservation for each end-to-end (E2E) transmission link of TI pair of users. Consequently, it is required a highly sophisticated resource allocation (RA) algorithm over cloud radio access networks (C-RANs). In this paper, we aim to address this problem based on admission control (AC) and power allocation in orthogonal frequency division multiple access (OFDMA) mode with considering joint fronthaul and access delay in C-RAN. The objective of our proposed RA problem is to minimize a total transmit power subject to E2E delays and C-RAN limitations, e.g., a capacity limitation of fronthaul and power transmission links. Due to tight E2E constraints, the RA

Resource Management and Admission Control for Tactile Internet in Next Generation of Radio Access Network

N Gholipoor, S Parsaeefard, MR Javan, N Mokari, H Saeedi, H Pishro-Nik
Journal Papers , , {Pages }

Abstract

Resource Management and Admission Control for Tactile Internet in Next Generation of RAN

Narges Gholipoor, Saeedeh Parsaeefard, Mohammad Reza Javan, Nader Mokari, Hamid Saeedi, Hossein Pishro-Nik
Journal PapersarXiv preprint arXiv:1907.01403 , 2019 June 30, {Pages }

Abstract

In this paper, a new queuing model for the Tactile Internet (TI) is proposed for the cloud radio access network (C-RAN) architecture of the next generation wireless networks, eg, 5G, assisted via orthogonal frequency division multiple access (OFDMA) technology. This model includes both the radio remote head (RRH) and baseband processing unit (BBU) queuing delays and reliability for each end to end (E2E) connection between each pair of tactile users. For this setup, with the aim to minimize the transmit power of users subject to guaranteeing tolerable delay of users, and fronthaul and access limitations, we formulate a resource allocation problem. Since the proposed optimization problem is highly non-convex, to solve it in an efficient manne

E2E Delay Guarantee for the Tactile Internet via joint NFV and Radio Resource Allocation

Narges Gholipoor, Hamid Saeedi, Nader Mokari, Eduard Jorswieck
Journal PapersarXiv preprint arXiv:1907.00391 , 2019 June 30, {Pages }

Abstract

The Tactile Internet (TI) is one of the next generation wireless network services with end to end (E2E) delay as low as 1~ ms. Since this ultra low E2E delay cannot be met in the current 4G network architecture, it is necessary to investigate this service in the next generation wireless network by considering new technologies such as network function virtualization (NFV). On the other hand, given the importance of E2E delay in the TI service, it is crucial to consider the delay of all parts of the network, including the radio access part and the NFV core part. In this paper, for the first time, we investigate the joint radio resource allocation (R-RA) and NFV resource allocation (NFV-RA) in a heterogeneous network where queuing delays, tran

Performance Analysis of All-Optical Multi-Hop FSO System over Gamma-Gamma Fading Channel

Fariba Jamali, Mohammad J Emadi, Hamid Saeedi
Conference Papers2019 Iran Workshop on Communication and Information Theory (IWCIT) , 2019 April 24, {Pages 05-Jan }

Abstract

In this paper, we consider a multi-hop all-optical amplify and forward (OAF) relaying technique to improve the performance of long-distance free-space optical communication systems. Each of AF relays uses gain controller block to efficiently amplify its received optical signal by the use of erbium doped fiber amplifier. It is also assumed that channel of each hop is modeled by a Gamma-Gamma fading along with a path loss model, and the channel state information is available at each relay to optimize its amplification gain as a function of channel coefficients. To evaluate the performance of the proposed system, outage probability is analytically derived and a non-convex optimization problem to minimize the outage probability subject to const

Cloud-based Queuing Model for Tactile Internet in Next Generation of RAN

Narges Gholipoor, Saeedeh Parsaeefard, Mohammad Reza Javan, Nader Mokari, Hamid Saeedi
Journal PapersarXiv preprint arXiv:1901.09389 , 2019 January 27, {Pages }

Abstract

Ultra-low latency is the most important requirement of the Tactile Internet. In this paper, a new queuing model for the Tactile Internet is proposed for the cloud radio access network (C-RAN) architecture of the next generation wireless networks, eg, fifth generation wireless networks (5G), assisted via power domain non-orthogonal multiple access (PD-NOMA) technology. This model includes both the radio remote head (RRH) and baseband processing unit (BBU) queuing delays for each end to end (E2E) connection between a pair of tactile users. For this setup, with the aim to minimize the transmit power of users subject to guaranteeing tolerable delay of users, and fronthaul and access limitations, we formulate a resource allocation problem. Since

Multi-Purpose Aerial Drones for Network Coverage and Package Delivery

Mohammadjavad Khosravi, Hamid Saeedi, Hossein Pishro-Nik
Journal PapersarXiv preprint arXiv:1911.05624 , 2019 November 13, {Pages }

Abstract

Unmanned aerial vehicles (UAVs) have become important in many applications including last-mile deliveries, surveillance and monitoring, and wireless networks. This paper aims to design UAV trajectories that simultaneously perform multiple tasks. We aim to design UAV trajectories that minimize package delivery time, and at the same time provide uniform coverage over a neighborhood area which is needed for applications such as network coverage or surveillance. We first consider multi-task UAVs for a simplified scenario where the neighborhood area is a circular region with the post office located at its center and the houses are assumed to be uniformly distributed on the circle boundary. We propose a trajectory process such that if according t

Resource Allocation-Based PAPR Analysis in Uplink SCMA-OFDM Systems

Aditya S Rajasekaran, Monirosharieh Vameghestahbanati, Mohammad Farsi, Halim Yanikomeroglu, Hamid Saeedi
Journal PapersIEEE Access , Volume 7 , 2019 November 7, {Pages 162803-162817 }

Abstract

Sparse code multiple access (SCMA) is a non-orthogonal multiple access (NOMA) uplink solution that overloads resource elements (RE’s) with more than one user. Given the success of orthogonal frequency division multiplexing (OFDM) systems, SCMA will likely be deployed as a multiple access scheme over OFDM, called an SCMA-OFDM system. One of the major challenges with OFDM systems is the high peak-to-average power ratio (PAPR) problem, which is typically studied through the PAPR statistics for a system with a large number of independently modulated sub-carriers (SCs). In the context of SCMA systems, the PAPR problem has been studied before through the SCMA codebook design for certain narrowband scenarios, applicable more for low-rate users.

Optimal Altitude Selection of Aerial Base Stations to Maximize Coverage and Energy Harvesting Probabilities: A Stochastic Geometry Analysis

Saeede Enayati, Hamid Saeedi, Hossein Pishro-nik, Halim Yanikomeroglu
Journal PapersIEEE Transactions on Vehicular Technology , 2019 October 31, {Pages }

Abstract

This paper provides radio frequency (RF) energy harvesting and coverage probability analysis using stochastic geometry in a two-hop communication network. In the first hop, terrestrial base stations (TBS) transmit RF energy and data to the aerial base stations (ABS) and in the second hop, ABSs forward the data to the user. Numerical results show that the energy harvesting and coverage probabilities can be maximized at almost the same altitude of the ABSs with respect to the TBSs height for low TBSs densities. However, as the density of the backhaul nodes and the energy harvesting sub-slot increases, energy harvesting probability improves while coverage probability monotonically decreases by increasing the ABSs height.

Moving aerial base station networks: A stochastic geometry analysis and design perspective

S Enayati, H Saeedi, H Pishro-Nik, H Yanikomeroglu
Journal Papers , , {Pages }

Abstract

A New Multiple Access Technique for 5G: Power Domain Sparse Code Multiple Access (PSMA)

Mohammad Moltafet, Nader Mokari, Mohammad Reza Javan, Hamid Saeedi, Hossein Pishro-Nik
Journal PapersIEEE Access , Volume 6 , 2018 January , {Pages 747-759 }

Abstract

In this paper, a new approach for multiple access in the fifth generation (5G) of cellular networks called power domain sparse code multiple access (PSMA) is proposed. In PSMA, we adopt both the power domain and the code domain to transmit multiple users’ signals over a subcarrier simultaneously. In such a model, the same sparse code multiple-access (SCMA) codebook can be used by multiple users, where, for these users, the power domain non-orthogonal multiple access (PD-NOMA) technique is used to send signals non-orthogonally. Although the signal of different SCMA codebooks can be detected orthogonally, the same codebook used by multiple users produces interference over these users. With PSMA, a codebook can be reused in the coverage area

Design and analysis of LDPC codes for joint source-channel decoding of two correlated sensors

Mohamad Khas, Hamid Saeedi, Reza Asvadi
Journal PapersIET Communications , Volume 12 , Issue 8, 2018 February 6, {Pages 1003-1010 }

Abstract

This study is concerned with the design of ensembles of systematic low-density parity-check (LDPC) codes to increase the lifetime of wireless sensors by taking advantage of the inherent correlation between the transmitted data of the sensors. The authors consider two correlated sensors where the data is encoded independently at each sensor through a systematic LDPC encoder and sent over two independent channels. At the receiver, a joint source-channel decoder consisting of two component LDPC decoders is considered where the encoded bits at the output of each component decoder are used as the a priori information at the other decoder. The authors first perform asymptotic performance analysis using the concept of extrinsic information transfe

Stochastic geometry based pricing for infrastructure sharing in IoT networks

Arman Azizi, Nader Mokari, Saeede Enayati, Hossein Pishronik, Hamid Saeedi
Conference PapersWireless Communications and Networking Conference (WCNC), 2018 IEEE , 2018 April 15, {Pages 05-Jan }

Abstract

In this paper, we propose a stochastic geometry based pricing for infrastructure sharing in Internet of Things (IoT) networks. We consider a game consisting of a Network Operator (NO) as the seller and an IoT Device Owner (DO) as the buyer in which the seller owns an infrastructure that can address the communication needs of the DO. Using the proposed scheme, we show that DO and NO can reach a win-win deal in which a reasonable cost is imposed to DO in exchange of providing an acceptable coverage by the NO. In particular, we show that the DO can achieve a coverage probability of interest at a lower cost compared to the case in which the proposed pricing model is absent. The proposed idea provides a transparent pricing model between NOs and

Dynamic SCMA codebook assignment methods: A comparative study

Milad Dabiri, Hamid Saeedi
Journal PapersIEEE Communications Letters , Volume 22 , Issue 2, 2018 February , {Pages 364-367 }

Abstract

In this letter, we consider a sparse code multiple access (SCMA) system, in which we assign the subcarriers to users based on the available channel gains between the users and base station over all subcarriers, referred to as channel state information. The effect of this process, referred to here as codebook assignment, has not been considered before on link-level performance of an SCMA. We propose three codebook assignment methods and compare their performance with each other as well as with the conventional case, where no assignment is performed. It is shown that significant performance improvement is achieved when any of the proposed methods is deployed. Through one of the proposed methods, we show that a trade-off between user performan

Cross-layer resource allocation for mixed tactile Internet and traditional data in SCMA based wireless networks

Narges Gholipoor, Hamid Saeedi, Nader Mokari
Conference PapersWireless Communications and Networking Conference Workshops (WCNCW), 2018 IEEE , 2018 April 15, {Pages 356-361 }

Abstract

The tactile internet requires an ultra short end-to-end (E2E) latency of about 1 ms and is proposed as one of the fifth-generation (5G) wireless cellular network applications. In a typical 5G framework, inclusion of tactile data that imposes different delay requirements than traditional data to the system, makes the system implementation more challenging. This paper is concerned with resource allocation to maximize the uplink sum rate of traditional data while satisfying the delay requirements for tactile data. To do so, we propose a practical model for delay in which the queuing delay both at the source and the base station is considered. We use sparse code multiple access (SCMA), one of the candidate multiple access techniques in 5G cellu

How to manage resources to provide physical layer security: Active versus passive adversary?

Mohammad Reza Abedi, Nader Mokari, Hamid Saeedi
Journal PapersPhysical Communication , Volume 27 , 2018 April 1, {Pages 143-149 }

Abstract

This paper studies the required physical (e.g. relays and jammers) and radio resources (e.g. power) to provide physical layer security for relay and friendly jammer assisted multiple-input and single-output transmissions in the presence of multiple active and passive adversaries. The passive adversaries are half duplex and only able to overhear the transmissions from the legitimate transmitter to the legitimate receiver, while the active adversaries are full duplex and able to jam and eavesdrop simultaneously. Since the channel information between adversaries and other nodes are uncertain, robust optimization methods are considered. In this regard, the main aim is to maximize the worst case secrecy rate subject to the normalized transmit po

Trajectory Processes that Preserve Uniformity: A Stochastic Geometry Perspective

Saeede Enayati, Hamid Saeedi, Hossein Pishro-Nik
Conference Papers2018 IEEE International Symposium on Information Theory (ISIT) , 2018 June 17, {Pages 51-55 }

Abstract

Stochastic geometry has been successfully applied for performance analysis of wireless networks. Performance of some emerging applications such as unmanned aircraft systems (UAS) relies heavily on unique mobility characteristics that are sometimes not fully captured by the current stochastic geometry results. This paper focuses on this issue by introducing families of trajectory processes that preserve uniformity within a cell in the framework of aerial base stations (ABS) networks. This means if the ABS move according to such trajectory processes, they will be distributed according to a binary point process (BPP) at any time snapshot. We propose two families of such processes, namely spiral and oval processes, and analytically prove our cl

PSMA for 5G: Network throughput analysis

Mohammad Moltafet, Nader Mokari, Mohammad R Javan, Hamid Saeedi, Hossein Pishro-Nik
Conference Papers2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC) , 2017 October 8, {Pages 06-Jan }

Abstract

In this paper, a new approach for multiple access (MA) in fifth generation (5G) of cellular networks called power domain sparse code multiple access (PSMA) is proposed. In PSMA, we adopt both the power domain and the code domain to transmit multiple users' signals over a subcarrier simultaneously. In such a model, the same sparse code multiple access (SCMA) codebook can be used by multiple users where, for these users, power domain non-orthogonal multiple access (PD-NOMA) technique is used to send signals non-orthogonally. Although different SCMA codebooks are orthogonal and produce no interference over each other, the same codebook used by multiple users produces interference over these users. We investigate the signal model as well as the

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