Analysis of Coded OFDM System over Frequency-Selective Fading Channels. (August 2003) Jun Zheng, B.S., Tsinghua University, P.R. China Chair of Advisory Committee: Dr. Scott L. Miller This thesis considers the analysis of system performance and resource allocation for a coded OFDM system over frequency selective fading channels. Due to the inseparable role taken by channel coding in a coded OFD...

By offloading computationally intensive tasks of smart end devices to edge servers deployed at the network, mobile computing (MEC) has become a promising technology provide services for Internet Things (IoT) devices. In order further improve access capability MEC and increase spectrum utilization efficiency, in this article, Non-Orthogonal Multiple Access (NOMA) is introduced into systems we st...

We propose a combined mathematical framework of order statistics and random matrix theory for multicarrier continuous-variable (CV) quantum key distribution (QKD). In a multicarrier CVQKD scheme, the information is granulated into Gaussian subcarrier CVs, and the physical Gaussian link is divided into Gaussian sub-channels. The sub-channels are dedicated to the conveying of the subcarrier CVs. ...

A novel communication system named “OR cooperative UWB” is proposed by bringing OR (Opportunistic Relaying) to UWB system. Particularly, the exact and closed-form symbol error rate (SER) expression is derived firstly in this paper. In order to maximize the capacity considering fairness between users, a definition of equivalent mean channel gain is given, and a joint resource allocation algorith...

We derive the ergodic (Shannon) capacity region of an M-user broadcast fading channel for code-division (CD), time-division (TD) and frequency-division (FD), assuming that both the transmitter and the receivers have perfect channel side information. It is shown that by allowing dynamic resource allocation, TD, FD and CD without successive decoding have the same ergodic capacity region and optim...

This paper considers state estimation of scalar linear systems using analog forwarding with multiple sensors, for both multiple access and orthogonal access schemes. Optimal state estimation can be achieved at the fusion center using a time varying Kalman filter. We show that in many situations, the error covariance decays at a rate of 1/M when the number of sensors M is large. Optimal allocati...

In this paper, a resource allocation scheme based on physical layer security under non-ideal condition for OFDMA system is introduced. Firstly, the program uses the information security constructing an OFDMA system Wiretap Channel Model under non-ideal condition. Based on this model, artificial noise is generated for secure communications combatting passive multiple eavesdroppers. In order to m...

We consider dynamic channel management (DCM), more specifically power control and channel allocation, in multi-carrier multi-antenna wireless cellular systems. A quasi-static channel model is assumed such that the channels remain approximately time-invariant within each packet. On a packet-by-packet basis, the mobile station (MS) receivers feed back the DCM parameters to the corresponding base ...

Adaptive resource allocation can drastically increase the throughput of an Orthogonal Frequency Division Multiple Access (OFDMA) system when the Channel State Information (CSI) is accurately known. Unfortunately, in practice, perfect CSI is rarely possible. In this paper, we consider adaptive subcarrier assignment for downlink multiuser OFDMA systems, where the transmitter has no knowledge of t...