Recent advances in wireless communications have made use of MC-CDMA and OFDM techniques to allow for high data rate transmission. Rapid time variations of the wireless communication channel have a effect on the performance of multicarrier modulation. In this paper, we emphasis the Doppler spread and Computes its effect on the bit error rate (BER) for multicarrier code division multiple access (...

This article focuses on a new path division multiple access (PDMA) for both uplink (UL) and downlink (DL) massive multiple-input multiple-output network over high mobility scenario, where the orthogonal time frequency space (OTFS) is adopted. First, 3D UL channel model received signal in angle-delay-Doppler domain are studied. Secondly, 3D-Newtonized matching pursuit algorithm utilized extracti...

In this paper a simple multiuser Multicarrier system is proposed for multiuser communication, user separation and detection using Interleave Division Multiple Access (IDMA). The performance of IDMA is analyzed in Gaussian and Qausi Static channels. In multicarrier Interleave Division Multiple Access (MC-IDMA) users are separated and identified by interleaving instead of codes as in Code Divisio...