Low Complexity Slm Based Paper Reduction for Multiuser Stbc Mc-Cdma System

Abstract

This project focuses mainly on SLM(Selective Mapping) technique to STBC MC-CDMA and a low complexity system is designed where equalization is carried out in time domain. As the number of users increases BER performance degrades. In this technique we first generate a number of alternate OFDM signals from the original data block . These are then transmitted to the OFDM signal having minimum PAPR( peak-to-average power ratio).SLM(Selective Mapping)system use the sample powers of sub blocks to generate cost functions for selecting samples to estimate the peak power of each candidate signal, thus reducing the computational complexity of the system. The data rate and complexity at the transmitter side is one of the best advantage for this technique when compared to the other techniques for PAPR( peak-to-average power ratio) reduction.
Keywords: MIMO; MC-CDMA; STBC; SLM