Title :
Multicarrier CDMA systems with transmit diversity
Author :
Cai, Xiaodong ; Akansu, Ali N.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
Abstract :
Transmit diversity was previously proposed to reduce the detrimental effects in fading channels. In this paper we apply the space-time block codes to multicarrier CDMA systems. Our emphasis is on designing receivers that can decode the space-time codes and suppress the multiple access interference. Among the four detecting schemes we propose the minimum mean square error combiner (MM-SEC) give the best tradeoff between performance and complexity. Simulation results show that MC-CDMA systems with transmit diversity have a much better performance than MC-CDMA systems without transmit diversity in multipath fading channels
Keywords :
block codes; code division multiple access; decoding; diversity reception; fading channels; interference suppression; land mobile radio; least mean squares methods; multipath channels; multiuser channels; radio receivers; radiofrequency interference; spread spectrum communication; DS-CDMA; complexity; decoding; downlink; minimum mean square error combiner; multicarrier CDMA systems; multipath fading channels; multiple access interference suppression; performance; receiver design; simulation results; space-time block codes; transmit diversity; Block codes; Discrete Fourier transforms; Fading; Multiaccess communication; Multicarrier code division multiple access; Receiving antennas; Signal processing; Space time codes; Transmitters; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886831
