Improved Nonlinear Tomlinson-Harashima Precoding Over Multipath Fading Channels
Jin Hang · 2006
This paper researches on Tomlinson- Harashima precoding, which is a Transmitter(Tx)- based nonlinear decorrelating interfer- ence cancellation scheme, to combat multiple access interference(MAI) for the downlink of Direct Sequence Code Division Multiple Ac- cess (DS- CDMA) system in multipath fading channels. Because diversity combining and MAI cancellation are employed in the trans- mitter, the mobile user receivers are greatly reduced. We propose two THP designs, PreRake THP and Multipath Decorrelating THP (MDTHP), are compared with conventional linear precoding, Rake and Transmitter(Tx)- based PreRake technology by simulation.