Down Link: Error-Rate Performance of Cognitive D-STTD MC-IDMA System

Abstract

5G wireless network has promised to offer high speed data transmission along with quality of service. Cognitive radio network (CRN) with multiple-input-multiple-output system have potential to offer higher bandwidth with high data rate. We present physical layer design of double-space-time-TD (D-STTD)-Transmit Diversity aided MIMO-MC-IDMA system invoking Cognitive spectrum. CRN is a modern device which entreat unused TV-band available spectrum and distribute such spectrum strongly to BS (base station). The fragments subdivided frequency-band of CRN is distributed for secondary users and is utilized for multi-carrier transmission-DSTTD system consists of two STBC block units and we invoke such system to obtain better error-rate performance. We detect signals at each mobile station using block-Nulling detection decoding algorithm. We present error-rate results of CRN defined D-STTD MC-IDMA for standard channel specifications. We observe from the error-rate results that D-STTD assisted MC-IDMA system enhances data rate with better performance while extracting higher bandwidth from CRN network.