International Journal Of Engineering And Computer Science
Multiple access schemes are used to allow many mobile users to share simultaneously a finite amount of radio spectrum. The sharing of spectrum is required to achieve high capacity by simultaneously allocating the available bandwidth to multiple users. This paper provides a comprehensive study of OFDM-IDMA. Comparisons with other alternative technology such as OFDMCDMA are provided. Cyclic Prefix reduces the ISI in the OFDM Block and MAI is reduced by IDMA in the AWGN channel. A Signal-to-Noise Ratio (SNR) evolution technique is developed to predict the Bit-Error-Rate (BER) performance of OFDM-IDMA by using BPSK modulation. Also, the authors provide simulation results in the matlab environment.