BER ANALYSIS FOR WAVELET BASED MIMO IN LTE USING VARIOUS MODULATION TECHNIQUES

Recent trends of multicarrier systems using wavelets outperform MIMO systems using the FFT, in that they have well-contained side lobes, improved spectral efficiency and BER performance, and they do not require a cyclic prefix. Here we study the wavelet packet and discrete wavelet transforms, comparing the BER performance of wavelet transform-based multicarrier systems for multipath Rayleigh channels with AWGN. Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input and Multiple Output (MIMO) are two main techniques employed in 4th Generation Long Term Evolution (LTE). In OFDM multiple carriers are used and it provides higher level of spectral efficiency as compared to Frequency Division Multiplexing (FDM). Wavelet based system does not require cyclic prefix, so spectrum efficiency is increased. It is proposed to use wavelet based MIMO at the place of Discrete Fourier Transform (DFT) based OFDM in LTE. We have compared the BER performance of wavelets and DFT based MIMO