Channel estimation of multi-rate DS-CDMA signals
Ying Zhang · Jounal of Xidian University · 2002
Channel estimation is very important in CDMA communication systems. However, in asynchronous CDMA communication systems the channel estimation of the multipath signals will be degraded by the near far effect. An efficient near far robust estimator is proposed in this paper, which is an extension of the Maximum Likelihood estimator to deal with the channel estimation of the multirate DS CDMA signals. The estimator is shown to be robust against the near far problem and can offer noticeable performance improvement over the conventional sliding correlator.