Receiver that simultaneously uses orthogonal codes and quasi-orthogonal codes in a cdma communication system, and, process of canceling interference between codes in a receiver that simultaneously uses orthogonal codes and quasi-orthogonal codes

摘要

'' RECEIVER WHICH SIMULTANEOUSLY USES ORTHOGONAL CODES AND ALMOST ORTOGONAL CODES IN A CDMA COMMUNICATION SYSTEM, AND, PROCESS OF CANCELING INTERFERENCE BETWEEN CODES IN A RECEIVER WHICH SIMULTANEOUSLY DOES 'HIGHLIGHTS'. A device and process for canceling code interference on a receiver of a CDMA (Code Division Multiple Access) communication system simultaneously using orthogonal codes and quasi-orthogonal codes is provided. In a receiver in accordance with an embodiment of the present invention, a channel estimator produces a channel estimate value for a pilot channel signal spread by an orthogonal code through defrosting. An almost orthogonal channel receiver receives a channel signal spread by an almost orthogonal code, scatters the channel signal, demodulates the scattered channel signal using the channel estimate value, and provides an output. An interference estimator estimates an interference value of the pilot channel signal with the channel signal spread across the quasi-orthogonal code by obtaining a correlation value between the orthogonal code corresponding to a pilot channel and the quasi-orthogonal code corresponding to an almost orthogonal channel. An interference canceller cancels the estimated interference from the nearly orthogonal channel receiver output.