Title :
BER analysis of a modified space-time spreading code for CDMA systems in MIMO Ricean channels
Author :
Jiann-An Tsai ; Chang-Lung Hsiao ; Chih-Lin I
Author_Institution :
Ind. Technol. Res. Inst., Hsinchu, Taiwan
Abstract :
In this paper, we derive an analytical bit-error-rate (BER) formula for evaluating the system performance of MSTS (modified space-time spreading) code with space-time diversity for cellular CDMA systems. The BER analysis for the MSTS is carried out for a multiple transmit and receive antenna system (also known as a MIMO system) in Ricean channels. For MIMO Ricean channels, the analytical BER is derived as function of angle spread, Doppler spread, and the Ricean K-factor. The BER results show that MSTS exploits spatial diversity and temporal diversity in time-varying MIMO channels and is compared to existing STS (space-time spreading) scheme. The results also show that the MSTS outperforms STS in a high mobility cellular environment.
Keywords :
MIMO systems; Rician channels; antenna arrays; cellular radio; channel coding; code division multiple access; error statistics; receiving antennas; space-time codes; time-varying channels; transmitting antennas; BER analysis; CDMA systems; MIMO system; Ricean channels; analytical bit-error-rate formula; cellular systems; code division multiple access; modified space-time spreading code; multiple receive antenna system; multiple transmit antenna system; space-time diversity; time-varying MIMO channels; Antenna accessories; Antennas and propagation; Bit error rate; Downlink; MIMO; Multiaccess communication; Performance analysis; Receiving antennas; Scattering; Sociotechnical systems;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258251
