F. Gei

Publications (2)0 Total impact

• Conference Proceeding: Frequency Domain receivers for IEEE 802.15.4a short range communication systems

  S. Morosi, T. Bianchi, F. Gei
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  ABSTRACT: In this paper we study the performance of an innovative Frequency Domain (FD) receiver for IEEE 802.15.4a short-range communications. The proposed system takes benefit of the guard intervals which are introduced in the standard between the symbols, so avoiding the need of the cyclic prefix introduction at the transmitter. The proposed receiver strategy is based on the Minimum Mean Square Error (MMSE) criterion and is compared with the classical rake, considering a scenario where a coordinator communicates with several devices in a short range environment. The channel model, which is characterized by severe multipath propagation, has been derived according to the IEEE 802.15.4a recommendations.
  Wireless Conference, 2009. EW 2009. European; 06/2009
• Source

  Available from: usp.br

  Conference Proceeding: Bandwidth Efficient Signalling Schemes for IR-UWB Short-Range Communications

  S. Morosi, D. Marabissi, F. Gei, J. Fiorina
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  ABSTRACT: High data-rate applications can be foreseen for future ultra-wideband systems in the areas of Internet access, multimedia services, wireless interfaces and location-aware services. Since it is particularly important to design low cost and low power devices, a growing attention will be devoted to the UWB systems with high spectral efficiency. In this paper, higher order modulation schemes are derived for impulse radio (IR) systems. The original signalling schemes provide a higher spectral efficiency and permit higher data-rate applications: though the IR systems are based on the use of baseband signals, the introduction of a proper orthogonal basis permits to derive higher order constellations as a linear combination of the elements of the basis with no additional bandwidth. Therefore, the increase of the spectral efficiency also permits to have a higher system throughput
  Spread Spectrum Techniques and Applications, 2006 IEEE Ninth International Symposium on; 10/2006