Title :
Performance comparison of differential space-time signalling schemes for OFDM systems
Author :
Hashim, W. ; Said, F. ; Allen, Ben ; Aghvami, A.H. ; Ismail, A.F.
Author_Institution :
Centre for Telecommun. Res., King´´s Coll., London, UK
Abstract :
Differential transmit diversity is an attractive alternative to its coherent counterpart, especially for multiple antenna systems where channel estimation is more difficult to attain compared to that of single antenna systems. In this paper we compare two different types of differential transmit diversity techniques for OFDM based transmissions. The first technique uses differential space-time block codes (DSTBC) from orthogonal designs and the second uses the differential cyclic delay diversity (DCDD). The results compare the bit error performance for several transmit antenna configurations. The results show that DCDD offers a very close performance to that of DSTBC, with the advantage of a simplified receiver structure.
Keywords :
OFDM modulation; block codes; channel estimation; delays; diversity reception; error statistics; mobile radio; space-time codes; telecommunication signalling; transmitting antennas; OFDM systems; channel estimation; cyclic delay diversity; differential space-time block codes; differential space-time signalling schemes; differential transmit diversity; multiple antenna systems; single antenna systems; Antennas and propagation; Block codes; Channel estimation; Decoding; Delay effects; Educational institutions; OFDM; Radio transmitters; Receiving antennas; Transmitting antennas;
Conference_Titel :
Networks, 2005. Jointly held with the 2005 IEEE 7th Malaysia International Conference on Communication., 2005 13th IEEE International Conference on
Print_ISBN :
1-4244-0000-7
DOI :
10.1109/ICON.2005.1635652
