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In this paper, we use NI USRP-RIO and LabVIEW programming environment to successfully build a 2x2 MIMO-OFDM system. And based on this system, the Zero Forcing(ZF) detection algorithm, the Zero Forcing-ordered Successive Interference Cancellation(ZF-OSIC) detection algorithm and Bell Labs Layered Space-Time coding(BLAST) are adopted, the program diagrams of 2x2 MIMO-OFDM system with BLAST in simulated channel and real wireless channel are shown, the simulation of diagrams and measured results are all presented. The conclusion based on the simulation of diagrams and measured results is that either in real channel or in simulated channel, the performance of receiver under ZF-OSIC algorithm is superior to ZF algorithm.

Research and Implementation of 2x2 MIMO-OFDM System with BLAST Using USRP-RIO