A novel partial sampling MMSE receiver for uplink multicarrier CDMA
Pingping Zong, Kunjie Wang, Yeheskel Bar-Ness · 2002
In a regular multicarrier CDMA (MC-CDMA) receiver, timing of the starting point of the desired signal must be found with small error in order to demodulate correctly the information carried by different subcarriers. This requires a complicated timing acquisition for each user in the receiver of the uplink MC-CDMA system due to the randomness of delays. We remove this requirement for the uplink receiver by providing a method using partial sampling demodulation. The proposed partial sampling minimum mean square error (MMSE) receiver is shown to have stronger capability of both interference suppression and near-far resistance than that of a regular symbol receiver The proposed receiver can be implemented adaptively by using a least-mean-square (LMS) algorithm. A training sequence is required to achieve initial adaptation.