APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN A CDMA COMMUNICATION SYSTEM

摘要

A method for assigning orthogonal codes used for a first system and a second system in a CDMA system including channels of the first system for spreading a pilot signal, a sync signal, a paging signal and a traffic signal with a fir st set of orthogonal codes corresponding to orthogonal code numbers in differen t rows from a set of orthogonal codes arranged in a matrix of m rows and m columns, and channels of the second system for spreading a second set of orthogonal codes corresponding to orthogonal code numbers different from sai d orthogonal code numbers for the first set of orthogonal codes. The orthogona l codes for the second system are transmitted at a data rate higher than a dat a rate of the first system. The method comprises the steps of: assigning orthogonal codes corresponding to the orthogonal code numbers of the orthogonal code set associated with at least one of 2n rows to the channels of the first system, wherein a set of the orthogonal codes are arranged in a matrix of subsets of orthogonal codes and inversed orthogonal codes, each subset including 2n rows and 2n columns; and assigning orthogonal codes corresponding to the orthogonal code numbers of the orthogonal code set associated with at least one of the remaining rows to the second system.