A Novel STBC Scheme in MIMO CDMA System

Abstract

A novel STBC scheme in MIMO CDMA system is presented. In the proposed scheme, the input symbols are split in blocks, each block has M symbols (M is the number of transmitting antennas), the M symbols are circularly encoded into M groups (each group has M cyclic symbols), the encoded M × M symbols are transmitted in Msymbol durations through Mantennas by multiplying M spread-codes respectively. The proposed STBC scheme has full coding rate (rate 1) and full diversity order but the decoding method is as simple as the conventional STBC introduced by Alamouti [1].