A Channel Matrix Rank Reduction Method Using Space – Time Coding in a MIMO System

Massive MIMO has an important role in 5G and IoT, however provides hardware problems in the system. To reduce these challenges we introduce a method for channel matrix rank reduction which reduces the computations volume in a m×n MIMO system using space – time coding in this paper. We used this method to 4×2 system to change its rank to 2×2, however it may be used to any desirable higher order m×n Massive MIMO systems.