We consider the problem of modelling and equalisation of a nonlinear satellite channel. The channel is assumed to be bandlimited and exhibits both amplitude and phase nonlinearities. In traditional models, computations are usually performed in the frequency domain and solutions are based on complex numerical techniques. In the paper, a discrete time model is used to represent the satellite link...

This paper deals with multi-user detection techniques in asynchronous multibeam satellite communications. The proposed solutions are based on successive interference cancellation architecture (SIC) and channel decoding algorithms. The aim of these detection methods is to reduce the effect of cochannel interference due to co-frequency access, and consequently, improves the capacity of the mulitb...

In this paper the performance of the DVB-S air interface over the Railroad Satellite Channel (RSC) at Ku-band is investigated. Due to the peculiar channel impairments that characterize the satellite channel in the railway environment, some extensions to the DVB-S air interface as defined in [1] are proposed and analyzed in order to test the resulting link quality. The final aim is the design of...

Multipath is undesirable for Global Navigation Satellite System (GNSS) receivers, since the reception of multipath can create a significant distortion to the shape of the correlation function leading to an error in the receivers’ position estimate. Many multipath mitigation techniques exist in the literature to deal with the multipath propagation problem in the context of GNSS. The multipath st...

There are many factors governing the performance of TCP-based applications traversing satellite channels. The end-to-end performance of TCP is known to be degraded by the delay, noise and asymmetry inherent in geosynchronous systems. This result has been largely based on experiments that evaluate the performance of TCP in single flow tests. While single flow tests are useful for deriving inform...

This paper presents a rate-adaptive error control (RAEC) protocol for multimedia multicast services in satellite-terrestrial hybrid networks. The pro osed scheme considers user fairness to multicast grou ancf adapts code rate according to the channel conditions. ?n order to provide fairness erceived by user application, a packet is transmitted via satelhe while the retransmission of the packet ...

This paper deals with the modeling and performance evaluation of different Code Division Multiple Access schemes suitable for applications in terrestrial and satellite mobile cornrnunication networks. The use of particular propagation channel models and the relative sensitivity of different demodulation schemes to their parameters are the subject the paper is focused on. In particular, an exten...