Channel estimation for multicarrier CDMA

Multicarrier CDMA (MC-CDMA) is a flexible and adaptable radio interface to provide dynamically changing bit rates and a variety of services on radio channels. An accurate channel estimate allows the use of multiuser detection and power loading to improve system performance. A blind linear multiuser channel estimator for MC-CDMA is proposed. Unlike the time varying spreading code or information bearing sequence, the channel is stationary over long time intervals. This fact is exploited in a new method for simultaneous estimation of the channel impulse response vector of multiple users. The complexity of the derived channel estimator can be reduced at the expense of accuracy. It is shown by computer simulation that the proposed method performs well under different scenarios