The current need for an increasingly wider bandwidth in satellite radio communications pushes to exploit higher frequency ranges, capable to support required transmission capacity, nowadays not easily possible at heavily busy lower frequencies [1]. However, higher frequency propagation suffers much more atmospheric components effects that reduce drastically connection availability in unfavourab...

An underwater acoustic communications system designed to transmit 20 kbit/s over ranges from 100 m up to 5 km between a semi-autonomous underwater vehicle and a surface vessel moving with up to 20 knots relative velocity is presented. Under these conditions, attention must be given not only to the steady-state equalisation capability of the receiver, but also to its ability to respond to sudden...

We propose the reception decision scheme and the distributed relay decision scheme to reduce the processing power consumption in the baseband and the redundant retransmission in non-orthogonal cooperative multicast network. By simulation, it is shown that the -outage constrained achievable multicast rate and energy efficiency achieved by proposed schemes are higher than ones by conventional sch...

The paper firstly proposes two factors influencing transmission rate of satellite data file, the number of files and threads. The paper uses the control variate method to design the test scheme of the transmitting satellite data file, and changes the values of variables for lots of repeated tests to achieve the mean transmission time. And the paper compared the file transmission rate under thre...

In this chapter, we focus on acoustic underwater networks, which utilize acoustic communication links to communicate between the nodes. It is wellknown that RF signals do not propagate well underwater, and the optical signals [1] are useful for short distances and under clear water propagation conditions. For long distances, the Navy has utilized acoustic communication. More recently, there has...

Wireless biomonitoring, first used in human beings for fetal heart-rate monitoring more than 30 years ago, has now become a technology for remote sensing of patients' activity, blood pulse pressure, oxygen saturation, internal pressures, orthopedic device loading, and gastrointestinal endoscopy. Technical advances in miniaturization and wireless communications have enabled development of monito...

This paper presents new attitude to adaptive control of the multi-path and multi-technology technology wireless access communications solutions. Presented approach represents response on transport processes management requirements to provide complex seamless wireless communication services in the selection of different modes coverage and guaranteed quality. Such solutions are related to communi...

Short-range digital communications at 60GHz have recently received a lot of interest because of the huge bandwidth available at those frequencies. The capacity offered to the users could finally reach 2Gbps, enabling the deployment of new multimedia applications. However, the design of analog components is critical, leading to a possible high nonideality of the front end (FE). The goal of this ...