Performance of Space-Time-Coded OFDM with Sectorized Antenna Reception

Authors:

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 channelâ€™s time-variance are reduced. In this paper, we demonstrate the benefits of Doppler compensating sectorized antennas for space-time coded OFDM.

Document type:

Conference Paper

Publication:

Darmstatdt, Germany, 26. - 27. February 2008

Conference:

International ITG/IEEE Workshop on Smart Antennas (WSA 08)

Files:

Paper