Exploitation of multi-beam directional antennas for a wireless TDMA/FDD MAC


Atmaca S., Ceken C., Erturk I.

World Congress on Engineering and Computer Science (WCECS 2007), San-Francisco, Kostarika, 24 - 26 Ekim 2007, cilt.1007, ss.95-96 identifier

  • Cilt numarası: 1007
  • Basıldığı Şehir: San-Francisco
  • Basıldığı Ülke: Kostarika
  • Sayfa Sayıları: ss.95-96

Özet

The effects of the multi-beam directional antennas on the performance of a new wireless TDMA/FDD MAC system are presented. Directional antennas intrinsically enable development of the SDMA systems and allow transmitting and receiving signals simultaneously at the same time slot. Employing a dynamic slot allocation table at a base station with 4 or 8 sector directional antennas and holding the wireless terminals' location information, a new SDMA/TDMA/FDD frame structure has been developed for wireless communications. The simulation studies realized using OPNET Modeler show that the proposed SDMA/TDMA/FDD system has substantially increased the traditional TDMA/FDD system capacity and provides 1.37 to 4 times better mean delay results when the number of users is increased from 4 to 32 under the same load in the wireless network models.