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2 Advances in Electronics and Telecommunications

2 2010

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Adaptive Coded Continuous-Phase Modulations for Frequency-Division Multiuser Systems

Perotti A., Remlein P., Benedetto S.

Advances in Electronics and Telecommunications

2010

Vol. 1, no. 1

50--58

In this paper we study adaptive coded modulations for wireless channels. Nonlinearity due to the radio-frequency power amplifier is considered and continuous-phase modulations (CPM) are adopted in order to make the nonlinearity effects negligible. The structure and properties of CPM are reviewed in a semi-tutorial fashion and coded modulation schemes are proposed. Moreover, frequency-division multiplexing (FDM) multiuser systems employing coded CPM are considered. Modulation-coding schemes achieving increasing spectral efficiencies in a multiuser scenario with tight intercarrier frequency spacing are designed and their performance in terms of spectral efficiency and error rate is assessed.

A Vision into Medium-Long Term Research in Wireless Communications

Benedetto S., Correia L. M.

Advances in Electronics and Telecommunications

2010

Vol. 1, no. 1

13--25

This paper summarises the 1st NEWCOM++ Vision Book. In it, the community of NEWCOM++ researchers, shaped under the common ground of a mainly academic network of excellence, has tried to distil their scientific wisdom into a number of areas characterised by the common denominator of wireless communications, by identifying the medium-long term research tendencies/problems, describing the tools to face them and providing a relatively large number of references for the interested reader. The identified areas and the researchers involved in their redaction reflect the intersection of the major topics in wireless communications with those that are deeply investi gated in NEWCOM++. They are preceded by an original description of the main trends in user/society needs and the degree of fulfil ment that ongoing and future wireless communications standards will more likely help achieving.