Title :
Joint Transmit Precoding in Downlink of MISO MC-CDMA Systems
Author :
Razavizadeh, S.M. ; Fardis, M. ; Noori, N.
Author_Institution :
Iran Telecommun. Res. Center, Tehran
Abstract :
In this paper, we propose two different linear precoding schemes for downlink transmission in multi-carrier code division multiple access (MC-CDMA) systems with multiple transmit antennas at the base station. These precoding schemes are used to suppress multiple access interference (MAI) and also to exploit diversity from multiple antennas. In this paper, it is assumed that user terminals are equipped with single receive antenna and in addition, they have very simple structure. The receiver in each mobile terminal does not have any knowledge about other users´ spreading sequences or channel state information. It is assumed that the channel state information is completely known at the transmitter. We will present the results of computer simulations for both schemes and compare them.
Keywords :
antenna arrays; code division multiple access; interference suppression; mobile radio; precoding; receiving antennas; transmitting antennas; wireless channels; MISO MC-CDMA Systems; channel state information; downlink transmission; interference suppression; multicarrier code division multiple access systems; multiple access interference; multiple transmit antennas; receive antenna; spreading sequences; transmit precoding; Base stations; Channel state information; Downlink; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; OFDM modulation; Receiving antennas; Transmitters; Transmitting antennas;
Conference_Titel :
Sarnoff Symposium, 2006 IEEE
Conference_Location :
Princeton, NJ
Print_ISBN :
978-1-4244-0002-7
DOI :
10.1109/SARNOF.2006.4534754
