Single‐ and multi‐ carrier IDMA schemes with cyclic prefixing and zero padding techniques
Qinghua Guo, Xiaojun Yuan, Li Ping · European Transactions on Telecommunications · 2008
Abstract In this paper, we investigate single‐carrier (SC) and multi‐carrier IDMA schemes with cyclic prefixing (CP) and zero padding (ZP) techniques. These schemes are called SC‐IDMA‐CP, SC‐IDMA‐ZP, orthogonal frequency‐division multiplexing (OFDM)‐IDMA‐CP and OFDM‐IDMA‐ZP, respectively. By exploiting the circulant property of channel matrices, the multi‐user detection of these schemes can be efficiently realised with per‐user complexity independent of the number of users and the length of inter‐symbol interference (ISI) channels. We show the potential advantages of ZP‐based schemes in power efficiency and convergence speed. Simulation results are provided to compare the four schemes. Copyright © 2008 John Wiley & Sons, Ltd.