In this paper, we study the joint allocation of three types of resources, namely, power,
subcarriers and relay nodes, in multi-relay assisted dual-hop cooperative OFDM systems. All …

In this paper, a physical-layer-security scheme for an underlay relay-based cognitive radio
network (CRN) that uses orthogonal frequency-division multiplexing (OFDM) as the medium …

We investigate the ergodic uplink resource allocation problem for secure communication in
relay-assisted orthogonal frequency-division multiple access (OFDMA)-based cognitive …

The internet of things (IoT) is becoming more indispensable in modern society as the further
development and maturity of information technology progresses. However the exponential …

In this paper, we propose an adaptive power loading algorithm for an OFDM (orthogonal
frequency division multiplexing)-based multi-relay regenerative network with relay selection …

Spectrum sensing is of the utmost importance to the workings of a cognitive radio network
(CRN). The spectrum has to be sensed to decide whether the cognitive radio (CR) user can …

中继协作OFDMA 系统以及非中继OFDMA 系统, 在比例速率公平性约束下的无线资源分配问题,
是含非线性等式约束的混合离散型优化问题, 很难得到满足实时性要求的近似最优算法 …

In this paper, joint optimization of subcarrier pairing, relay selection and power allocation is
formulated through a capacity maximization problem in orthogonal frequency division …

The ultimate efficiency of a wireless network is achieved when various resources are
allocated in a joint optimization process. This paper proposes the optimal solution for a joint …

In this paper, a scheme that exploits cooperative diversity of multiple relays to provide
physical layer security against an eavesdropping attack is concerned. Relay‐based …