In this paper, selection criteria of Forward Error Correction (FEC) codes, in particular, the convolutional codes are evaluated for a novel air interface scheme, called Low Density Signature Orthogonal Frequency Division Multiple Access (LDS-OFDM). In this regard, the mutual information transfer characteristics of turbo Multiuser Detector (MUD) are investigated using Extrinsic Information Trans...

Physical-layer network coding (PLNC) has the ability to drastically improve the throughput of multi-source wireless communication systems. In this paper, we focus on the problem of channel tracking in a Decode-and-Forward (DF) OFDM PLNC system. We proposed a Kalman Filter-based algorithm for tracking the frequency/time fading channel in this system. Tracking of the channel is performed in the t...

– Recently, Orthogonal Frequency Division Multiplexing (OFDM), as a multi-carrier, and a single carrier transmission systems are used widely in the communications industrial systems. Each one of these two techniques has their own advantages and disadvantages. To maintain a high data rate, OFDM is preferred over the single-carrier transmission system due to several shortages like, complexity of ...

In this paper an attempt is made to study the theoretical fundamentals for Coherent optical orthogonal frequency division multiplexing (CO-OFDM) for high speed, long haul optical transmission and investigated the nonlinear effect of a 16-QAM CO-OFDM and WDM CO-OFDM at 10Gbps data rate. We then demonstrated the transmission performance through simulation for single channel COOFDM and multi-chann...

In order to address the shortcomings of orthogonal frequency division multiplexing (OFDM) and extend lifetime energy-constrained Internet-of-Things (IoT) devices, combination filter bank multi-carrier (FBMC) simultaneous wireless information power transfer (SWIPT) is investigated in this paper. Specifically, a multi-user FBMC-based SWIPT system proposed which user nodes (UNs) have capability fo...

This paper investigates the Multi-band OFDM (MB-OFDM) based physical (PHY) layer proposal for IEEE 802.15.3a working group on short-range high data-rate Ultra-wideband (UWB) communications. An overview of the MB-OFDM PHY layer architecture with its various parameters is presented and the optimal choice of critical parameters is discussed. Performance results on IEEE UWB channel models are analy...

Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular systems. A key issue in MU-OFDM is the allocation of the OFDM subcarriers and power among users sharing the channel. Previous allocation algorithms cannot ensure fairness in advance. In this paper, a proportional rate adaptive resource allocation meth...

This paper describes a multiuser scenario with several terminals acceding simultaneously to the same frequency channel. The objective is to design an optimal multiuser system that may be used as a comparative framework when evaluating other suboptimal solutions and to contribute to the already published works on this topic. The present work assumes that a centralized manager knows perfectly all...

The non-orthogonal multiple access (NOMA) method is a novel technique that aims to increase spectral efficiency (SE) and accommodate enormous user accesses. Multi-user signals are superimposed transmitted in the power domain at transmitting end by actively implementing controllable interference information, multi-user detection algorithms, such as successive cancellation (SIC), performed receiv...

We consider a multi-user multiple-input multiple-output (MU-MIMO) system that uses orthogonal frequency division multiplexing (OFDM). Several receivers are developed for data detection of MUMIMO transmissions where two users share the same OFDM time and frequency resources. The receivers have partial state information about the MU-MIMO transmission with each receiver having knowledge of the MU-...