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Hardware implementation of Zero-force Precoded MIMO OFDM system to reduce BER

Deepak Kumar S Nadiger, Meena Priya Dharshini

Achieving high data rates in wireless transmission is in demand and has become a competitive factor in current fast moving world. Generally Multiple-Input-Multiple-Output systems are used to achieve high data rates. In MIMO every user may experience inter-user-interference because data of two or more users is transmitted from transmitter over a same channel. To mitigate this inter-user-interference a zero-force pre-coding is used at the transmitter, where data is coded and transmitted through channel (MIMO), so that data received at receiver has less Bit Error Rate (BER). Various efforts are made to simulate zero-force pre-coding algorithm for performance, in this work zero-force pre-coding technique with OFDM transmitter and receiver is implemented in HDL and this Zero-force precoded MIMO-OFDM system is simulated using Xilinx 13.4 and MATLAB R2013. BER is calculated for different values of SNR and this BER is compared with MIMO OFDM channel without pre-coding. More over this zero-force pre-coded MIMO OFDM system is synthesized for synthesis report.