PN code generator, GOLD code generator, PN code despreader, method for generating PN code, method for generating GOLD code, method for despreading PN code and computer program

摘要

Shift code patterns at four continuous phases obtained by dividing 15 shift code patterns given to the respective flip-flops of a linear feedback shift register of degree 4 into four parts are stored in a code memory ( 11 ). Besides, mask code patterns to shift a phase of a PN code (PN) to be generated by every four phases, are stored in a code mask memory ( 12 ). Next, a logical operation is performed at a phase shift circuit ( 13 ) by using the shift code pattern outputted from the code memory ( 11 ) and the mask code pattern outputted from the code mask memory ( 12 ), to generate a PN code (PN) having a code length of 15 from a random phase.