Advanced transceiver schemes for next generation high rate telemetry

We investigate the problem of increasing the spectral efficiency of current high rate telemetry systems in two different scenarios, which exploit one and two channels, respectively. We will analyze several techniques aimed at improving different stages of the transceiver scheme. We will optimize the transmission parameters and apply advanced receiver architectures, able to take into account part of the channel memory and of the interchannel interference. We will propose a new signal predistortion algorithm, which has very good performance in both considered scenarios, and we will show that, by combining the presented techniques, significant gains are possible over the current configuration. The whole analysis is aimed at providing information theoretical bounds to the achievable transmission rates

Efficient satellite systems based on interference management and exploitation

We study the benefits arising from the exploitation of interference in two satellite communications scenarios. We show that promising gains, with respect to the classical interference avoidance approach, can be achieved by applying non-orthogonal transmission schemes together with advanced transceiver architectures. We demonstrate that the non-orthogonal solutions significantly outperform the classical ones in all analyzed scenarios, at the cost of an increased complexity

Transmission parameters optimization and receiver architectures for DVB-S2X systems

Summary The second-generation specification of the digital video broadcasting for satellite (DVB-S2) was developed in 2003 with the aim of improving the existent broadcasting standard DVB-S. The main new features introduced by DVB-S2 included increased baud rates, higher cardinality constellations (up to 32 points), and more efficient binary codes. The extension to DVB-S2, approved in 2014 with the name DVB-S2X, together with continuous technological evolution, moves further steps in this direction, with the use of constellations with cardinality up to 256 points, improved granularity of modulation and coding schemes, and the possibility to increase the baud rate. In this scenario, it is important to be able to ascertain what is the best transceiver structure, starting from the choice of the shaping pulse and the baud rate of the transmitted signals and ending with the most promising receiver architectures, with the aim of maximizing the spectral efficiency. In this paper, we will discuss some of the aspects of this investigation, namely, the optimization of transmission parameters and the description of an efficient receiver. We will then assess the performance of the proposed scheme in comparison with a classical DVB-S2 architecture. Some synchronization aspects will also be discussed, to account for the impairments introduced by the channel