Title :
A solution for performance improvements of OFDM-CDMA system with pilot tone
Author :
Urosevic, Ugljesa ; Veljovic, Zoran ; Simunic, D. ; Radusinovic, Igor
Author_Institution :
Fac. of Electr. Eng., Univ. of Montenegro, Podgorica, Montenegro
Abstract :
In this paper, MISO OFDM-CDMA downlink scheme is proposed as a solution for improving performance of the OFDM-CDMA downlink system with pilot tone and threshold detection combining (optimum TDC). The new presented system with MISO included uses space-time block coding applied to two and four transmit antennas. BER (Bit Error Rate) performance in the case of Ricean frequency selective fading is evaluated for the original system as well as for the one with MISO included. For that reason an adequate simulation model is developed. The results show that the proposed system significantly outperforms the OFDM-CDMA downlink system with pilot tone and optimum TDC.
Keywords :
OFDM modulation; block codes; code division multiple access; error statistics; BER; MISO OFDM-CDMA downlink scheme; OFDM-CDMA downlink system; OFDM-CDMA system; Ricean frequency selective fading; adequate simulation model; bit error rate; optimum TDC; pilot tone; space-time block coding; threshold detection; transmit antennas; Bit error rate; Downlink; Multiaccess communication; OFDM; Receiving antennas; Signal to noise ratio; Transmitting antennas; BER; CDMA; MISO; OFDM;
Conference_Titel :
Telecommunications Forum (TELFOR), 2012 20th
Conference_Location :
Belgrade
Print_ISBN :
978-1-4673-2983-5
DOI :
10.1109/TELFOR.2012.6419219
