Performance Analysis of Low-Complexity Multiuser STBC MC-CDMA System
In this paper, a low complexity and efficient multiuser space time block code multicarrier code division multiple access (STBC MC-CDMA) for downlink wireless communication system is proposed. STBC MC-CDMA provides diversity gain to improve transmission efficiency of mobile wireless systems where both STBC encoder and decoder are in time domain thus reducing the complexity at the receiver side. Proposed STBC MC-CDMA scheme achieves a diversity order of 2 without channel state information (CSI) at the transmitter under flat fading conditions without bandwidth expansion. In this paper, the STBC MC-CDMA is compared with the STBC OFDM scheme under Rayleigh fading channel and AWGN channel using zero forcing (ZF) linear detection scheme and as anticipated the proposed STBC MC-CDMA outperforms STBC OFDM. Simulation results verify this.
KeywordsSTBC MC-CDMA CSI Linear detection schemes Rayleigh fading channel
- 1.Fazel, K., Kaiser, S.: Multi-carrier and spread spectrum systems: From OFDM and MC-CDMA to LTE and WiMAX. Wiley (2008)Google Scholar
- 3.Yang, L.-L.: Multicarrier communications. Wiley (2009) Google Scholar
- 5.Hassib, M.D., Singh, M., Ismail, M., Nordin, R.: Efficient and low complexity STBC-OFDM scheme over fading channel. In: 18th Asia-Pacific Conference on Communications (APCC), 2012. IEEE, pp. 402–406 (2012)Google Scholar
- 7.D’Orazio, L., Sacchi, C., Fedrizzi, R., De Natale, F.G.: An adaptive minimum-BER approach for multi-user detection in STBC-MIMO MC-CDMA systems. In: Global Telecommunications Conference, 2007. GLOBECOM’07. IEEE, pp. 3427–3431 (2007)Google Scholar