Title :
A hybrid transmit diversity scheme of prefilter and transmit adaptive array in MISO wireless CDMA systems
Author :
Kim, Sanhae ; Lee, Woncheol ; Shin, Yoan
Author_Institution :
Sch. of Electron. Eng., Soongsil Univ., Seoul, South Korea
Abstract :
In this paper, we propose a hybrid transmit diversity scheme which combines transmit adaptive array (TxAA) and prefilter for downlink of multi-input single-output (MISO) wireless CDMA systems. By utilizing the optimum transmit antenna weight and prefilter coefficients which maximize signal-to-noise ratio at the receiver, the proposed scheme significantly outperforms the TxAA or prefilter-only system with slight increase of system complexity. Moreover, the performance gain obtained by the proposed scheme becomes significant for the channels whose multi-path components take similar average powers.
Keywords :
adaptive antenna arrays; code division multiple access; diversity reception; filters; mobile radio; multipath channels; radio links; radio receivers; transmitting antennas; MISO wireless CDMA systems; code division multiple access; hybrid transmit diversity scheme; multiinput single-output; multipath channels; prefilter coefficients; transmit adaptive array; transmit antenna; Adaptive arrays; Adaptive systems; Channel capacity; Computer hacking; Downlink; Multiaccess communication; Performance gain; Phased arrays; Receiving antennas; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1208827
