Decorrelator for CDMA base station transmitter

摘要

PURPOSE: To simplify the configuration of a base station transmission de- collilator. ;CONSTITUTION: An inverse matrix of a correlation matrix between spread code series of each channel is obtained in advance. Products among transmission information bits, the spread code series and elements of the inverse correlation matrix are added in the direction of rows or columns of the inverse correlation matrix and the result is stored in a ROM provided to each channel of a storage section 12 as a table and the sums are sequentially outputted based on a signal from a counter 14 to calculate the total sum at an adder circuit 13. Thus, the number of terms of addition executed by the adder circuit 13 is reduced to be all channel numbers, not to be square of all the channel numbers, resulting in simplifying the equipment. Even when power control is executed for each channel, lots of multipliers are not required and the configuration is simplified.;COPYRIGHT: (C)1995,JPO