Design of Modified Code Word for Space Time Block Coded Spatial Modulation

Abstract

The Multiple Input Multiple output transmission scheme is effective technique to enhance the spectral potency of wireless communication system. MIMO transmission methods include space–time block coding (STBC) and spatial multiplexing. Hereinto, STBC aims at increasing the bit error rate (BER) performance whereas, the spatial multiplexing is meant to reinforce the spectral potency. Space-time block coded spatial modulation (STBC–SM) has been introduced to use the benefits of each spatial modulation and coordinate system block codes. To enhance the system performance, code words are introduced. The modified code word introduces a thought of versatile coefficients into the Modulation of STBC-SM. A technique is planned to get the best versatile coefficients. Moreover, the primary modified code words may be applied to the systems developed from the STBC-SM. Then, STBC-SM system is combined with CDMA technology so as to makes the system capable of serving high number of users by assigning every user with its distinctive PN code.