Cooperative communication has been broadly investigated to improve performance of wireless communication. But, most of the conventional cooperative techniques have a common problem of decreased transmission rate because the destination should receive the decodable compositions of symbols from the source and the relay. In this paper, we propose the new cooperative system which uses a feedback si...

We explore the influence of cooperative jamming on covert communication for integrated satellite–terrestrial relay networks (ISTRN) in this article, where one full-duplex is utilized to support communications and acts as a jammer confuse eavesdroppers. A scheme first proposed efficiently achieve specific scenario. Further, probability detection error (PDE) derived. Subsequently, minimum PDE cal...

-For non-relaying cooperative networks, the previous work proposed a distributed space-time block code (STBC) scheme considering information exchange errors in two-user cooperative networks. We propose a distributed Hybrid multiple-input multiple-output (MIMO) Transceiver scheme (HMT) considering information exchange errors in three-user cooperative networks. For relaying cooperative networks, ...

We develop and analyze space–time coded cooperative diversity protocols for combating multipath fading across multiple protocol layers in a wireless network. The protocols exploit spatial diversity available among a collection of distributed terminals that relay messages for one another in such a manner that the destination terminal can average the fading, even though it is unknown a priori whi...

In this paper, we conduct a cross-layer analysis of both the jamming capability of the cognitiveradio-based jammers and the anti-jamming capability of the cognitive radio networks (CRN). We use a Markov chain to model the CRN operations in spectrum sensing, channel access and channel switching under jamming. With various jamming models, the jamming probabilities and the throughputs of the CRN a...

Aiming at studying the jamming methods of Link16 system, the anti-jamming techniques adopted by Link16 are studied and a simulation model is established in the paper. Based on the conventional static multi-tone interference which is used frequently at present, a new dynamic jamming method named Frequency Hopping Collision (FHC) interference is put forward. The features and jamming performance o...

We evaluate the secrecy performance of a multiple access cooperative network where the destination node is wiretapped by a malicious and passive eavesdropper. We propose the application of the network coding technique as an alternative to increase the secrecy at the destination node, on the top of improving the error performance of the legitimate communication, already demonstrated in the liter...

Covert communication can hide the legitimate transmission from unauthorized eavesdropping. Benefiting deployment flexibility, unmanned aerial vehicles (UAVs) be utilized to enhance confidentiality. In this correspondence, we consider a covert network with aid of full-duplex UAV relay, which is employed help and confuse warden. The warden adopts radiometer detect transmission. We first find opti...

This paper studies a new decode-and-forward relaying scheme for a cooperative wireless network composed of one source, K relays, and one destination and with binary frequency-shift keying modulation. A single threshold is employed to select retransmitting relays as follows: a relay retransmits to the destination if its decision variable is larger than the threshold; otherwise, it remains silent...