Title :
Combining space-time codes and interference suppression in asynchronous DS-CDMA
Author :
Hombs, Brandon ; Lehnert, James S.
Author_Institution :
Purdue Univ., West Lafayette, IN, USA
Abstract :
A simple transmit diversity method for asynchronous direct-sequence CDMA systems is proposed. In addition, a receiver structure that can effectively suppress multiple-access interference and exploit transmit diversity is examined. The proposed system is shown to perform well even when there are severe impairments to the desired user from high-power interferers. Finally, an adaptive implementation of the receiver is proposed, and its performance is evaluated with simulations.
Keywords :
MIMO systems; antenna arrays; code division multiple access; diversity reception; radio receivers; radiofrequency interference; receiving antennas; space-time codes; spread spectrum communication; transmitting antennas; CDMA receiver; DS-CDMA; asynchronous direct sequence code division multiple access; high-power interferer; interference suppression; space-time code; transmit diversity; Diversity methods; Diversity reception; Downlink; Fading; Interference suppression; MIMO; Multiaccess communication; Multiple access interference; Space time codes; Transmitting antennas;
Conference_Titel :
Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE
Print_ISBN :
0-7803-8344-3
DOI :
10.1109/WCNC.2004.1311832
