Frequency domain iterative methods for detection and estimation

Single-carrier transmission is one of the most potential options for uplink transmission in wide-area deployments. It combines the benefits of computationally simple transmitter processing and highly efficient power amplification at the terminal. Frequency-domain methods for efficient equalization can be utilized at the access point either in linear MMSE equalization or in iterative turbo equalization. We describe the potential solutions in frequency-domain receiver processing for equalization and channel estimation, and evaluate their performance. We demonstrate the potential for turbo processing to provide significant performance gain even in simple singleinput-single-output channels. We note that extensions to multiple-input-multiple-output cases are straightforward.