MC‐CDMA in the Context of General Multiuser/ Multisubchannel Transmission Methods
Jürgen Lindner · European Transactions on Telecommunications · 1999
Abstract MC‐CDMA is considered in the context of more general multiuser/multisubchannel transmission systems. Those systems understand the transmission task for all users as an integrated whole and they allow an easy understanding of the advantages and disadvantages of MC‐CDMA in comparison with alternative methods. Multiple antennas are also included. An appropriate vector‐valued transmission model is explained and then special the cases OFDM‐OFDMA and MC‐CDMA are considered. Examples are discussed which demonstrate the advantages of spreading techniques in the context of OFDM‐OFDMA and the additional gain in power (or bandwidth) efficiency compared with pure OFDM‐OFDMA. Simulation results for an indoor scenario with 8 users are presented. Variants of MC‐CDMA, extensions and alternatives are also discussed.