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Molecular communications (MC) is a promising paradigm which utilizes molecules to implement communication among nano-machines. Cooperative relaying strategies can be used to extend communication distance and achieve reliable remote communications. In this paper, a two-hop diffusion-based molecular communication with three nano-machine nodes is considered. To mitigate the drawback of traditional cooperative...
In this paper, physical-layer network coding with spatial modulation in two-way relaying channels is studied. Two multi-antenna source nodes exchange information via a denoise-and-forward (DNF) relay node, and space shift keying modulation is employed in both source nodes and relay. The error performance in terms of average symbol error probability is evaluated. To further enhance the transmission...
In traditional broadcast systems, the video services are broadcasted for all the users whose qualities are determined by the worst channel conditions. To achieve high performance gain for the users with good channel states, hierarchical modulation (HM) and scalable video coding (SVC) are proposed. Specifically, SVC provides base layer and enhancement layer videos so that the system can satisfy various...
This article presents a hierarchical cooperative relay-based heterogeneous network (HCRHeNet) to support both unicast and multicast services, where hierarchical cooperative relay nodes are deployed to provide a cost-effective coverage extension based on the convergence of heterogeneous radio networks. The underlined HCR-HeNet divides its coverage into three layers: hierarchical cooperative basic layer,...
In this paper we build a Software Defined Radio (SDR) testbed for the mobile broadcast system which using hierarchical modulation based on the USRP (Universal Software Radio Peripheral) platform. In hierarchical modulation, two separate data streams are modulated into one single stream. One stream, called the "High Priority" (HP) stream is embedded within a "Low Priority" (LP)...
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