System performance enhancement for T-code family

Wireless communication with simple decoder leads to less power consumption in receivers. Based on this, a family of space-time block codes, called T-codes, has been recently proposed. This family benefits from simple decoder for zero-forcing (ZF) receiver. Focusing on ZF receivers, in this paper, we modify the performance of T-code family without sacrificing the simplicity of the receiver. We suggest three modification methods, which work based on change the power of the transmitted symbols, symbol by symbol detection, and rate reduction. We also show through the paper that combining these modification methods can also be effective in enhancing the performance of the system. Simulation results show that these modification methods are very efficient especially when two first methods, i.e. change the power of the transmitted symbols and symbol by symbol detection, are employed.