author = {P. Klenner and K.-D. Kammeyer},
  year = {2008},
  month = {Feb},
  title = {Performance of Space-Time-Coded OFDM with Sectorized Antenna Reception},
  URL = {http://wsa2008.nt.tu-darmstadt.de/nt/index.php?id=400},
  address={Darmstatdt, Germany},
  abstract={Diversity is a well-known means to counter the detrimental effect of fading. Against this background, space-time codes have been designed to facilitate transmit diversity with a suitable receiver. Furthermore, space-time codes combined with OFDM allow for the utilization of frequency selective channels. However, a general assumption underlying the design of space-time codes is the time-invariance of the channel, which is violated in a high mobility environment. Large Doppler spread causing rapidly time-varying channels can be compensated at the receiver by sectorized antennas, which restrict the angle of incidence of imping waves to a finite range. Compared to an omnidirectional antenna, the resulting Doppler spread of a sector antenna and the channel’s time-variance are reduced. In this paper, we demonstrate the benefits of Doppler compensating sectorized antennas for space-time coded OFDM.   
  booktitle={International ITG/IEEE Workshop on Smart Antennas (WSA 08)}