VLSI Implementation of Low Complexity MIMO Systems using SEC-QPSK Detection Circuits

Abstract

MIMO(Multiple-Input Multiple-Output) is a high-speed data transmission technology in digital era. In real time, the implementation of MIMO is more complicated. To overcome this issue a novel companding method is introduced to decrease both circuit complexity as well as Peak to Average Power Ratio(PAPR)via converting the companded statistics signal into exponential delivery with adjustable factors. An introduced SEC (Stepwise Exponential Companding) based Quadrature Phase Shift Key (QPSK) detection improve the Bit Error Rate (BER) with low power via minimizing the Companding deformation in the decrease. Also, with the presentation of an inflexion point then convert factors, the introduced method can offer grater adaptability in the PARR decrease, and hence accomplishes an excellent tradeoff between power spectral density (PSD),PAPR decrease, and BER execution with fewer difficulty. Simulation outputprove that the introduced method can significantly improve the BER and difficulty execution viafor adecreasing PAPR successfully. The proposed method can reduce the BER, PAPR, number of clock cycles, look up tables  and number of used slices by 54%, 73%, 99.96%, 99%, 86% respectively.