Frequency domain iterative equalization for single-carrier FDMA

In this paper, the performance of a jointly Gaussian approach (JGA) as a detection method for Single Carrier Frequency Division Multiple Access (SC-FDMA) is analyzed. Combined with an iterative detector, the JGA can efficiently remove residual interference by exchanging extrinsic log-likelihood ratios (LLRs) with a successive error control decoder. At the cost of a moderate increase in complexity, this system can significantly enhance overall performance. Monte Carlo simulations are used to illustrate the gains in terms of bit error rates (BER) of the JGA over traditional non-iterative equalization methods, as well as the throughput gains for the uplink-scenario of the long-term evolution (LTE) standard.