Intelligent Reflecting Surface Assisted Multi-User OFDMA: Channel Estimation and Training Design
نویسندگان
چکیده
منابع مشابه
Genetic Algorithm Assisted Channel Estimation for Multi-user Communication Systems
A novel multiuser code division multiple access (CDMA) channel estimator based on genetic algorithm is considered which estimates the fading channel impulse response coefficients of all the users. Furthermore, the optimum multiuser detector, based on the maximum likelihood (ML) rule, is developed in order to identify the transmitted data sequence. As is demonstrated in simulation results, the p...
متن کاملChannel Estimation and Training Design for Hybrid Analog-Digital Multi-Carrier Single-User Massive MIMO Systems
In this paper we study the channel estimation problem for a CP-OFDM based hybrid analog-digital massive MIMO system. In contrast to a conventional MIMO system, two additional constraints need to be fulfilled. First, the analog precoding is achieved using only a phase shift network, which imposes constant modulus constraints on the elements of the RF precoding and decoding matrices. Second, ther...
متن کاملSemi-Blind Channel Estimation based on subspace modeling for Multi-user Massive MIMO system
Channel estimation is an essential task to fully exploit the advantages of the massive MIMO systems. In this paper, we propose a semi-blind downlink channel estimation method for massive MIMO system. We suggest a new modeling for the channel matrix subspace. Based on the low-rankness property, we have prposed an algorithm to estimate the channel matrix subspace. In the next step, using o...
متن کاملPerformance Analysis of cooperative SWIPT System: Intelligent Reflecting Surface versus Decode-and-Forward
In this paper, we explore the impacts of utilizing intelligent reflecting surfaces (IRS) in a power-splitting based simultaneous wireless information and power transfer (PS-SWIPT) system and compare its performance with the traditional decode and forward relaying system. To analyze a more practical system, it is also assumed that the receiving nodes are subject to decoding cost, and they are on...
متن کاملMulti-user Ofdm Employing Parallel Interference Cancellation Assisted Decision-directed Channel Estimation
Multiple reception antenna assisted Space Division Multiple Access (SDMA) techniques designed for wireless Orthogonal Frequency Division Multiplexing (OFDM) systems have recently drawn wide interests. These techniques facilitate the implementation of effective multi-user detection algorithms at the receiver. A prerequisite of their operation is the availability of an estimate of the channels’ f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Wireless Communications
سال: 2020
ISSN: 1536-1276,1558-2248
DOI: 10.1109/twc.2020.3021434