There have been growing interests in body-centric wireless communications [1] due to their abundance applications, for example, in personal healthcare, smart home, personal entertainment and identification systems, space exploration and military etc. A generic concept of body-centric wireless communications may include scenarios which RF sensor nodes are placed in/on body. Antennas and propagat...

A capacitive coupling dual-band circular patch antenna for on-/off-body communications is proposed 3.5 GHz world interoperability microwave access band and 5.8 industrial scientific medical band. The has a compact structure with single substrate made of polydimethylsiloxane which flexible easy to wear. To realise off-body mode, the adopted bias feeding. on-body mode achieved by symmetrically lo...

In wireless body-centric communications, either the transmitter or the receiver, or both are located in close proximity to the human body. Thus, the Line-of-Sight (LOS) components of the radio signal are particularly susceptible to shadowing caused by human body. In earlier, the effect of human body shadowing was studied using κ-μ fading channel, where the resultant dominant signal components d...

– In order to implement visible light communications (VLC) through indoor lighting, a set of challenges arise due to conflicting requirements from the two missions. In this paper we examine one of these challenges: how to communicate when the lights are " off. " We investigate VLC with limits on transmit power, which we define to be low enough so that users will accept that the lights are in th...