Patent ID: 6522687
Filing Date: 2003-02-18
Classification: H04B,H04L

Abstract:
A despread signal generating device in a spread spectrum communication system, comprising:a pseudo-random noise generator for generating an I-arm and a Q-arm pseudo-random noise codes; an inverter for inverting the I-arm pseudo-random noise code to produce an inverted I-arm pseudo-random noise code; a first multiplier for multiplying the I-arm pseudo-random noise code by an I-arm baseband spread signal; a second multiplier for multiplying the inverted I-arm pseudo-random noise code by a Q-arm baseband spread signal; a third multiplier for multiplying the Q-arm pseudo-random noise code by the Q-arm baseband spread signal; a fourth multiplier for multiplying the Q-arm pseudo-random noise code by the I-arm baseband spread signal; a first adder for adding the multiplication results of the first multiplier and the third multiplier, said first adder outputting an I-arm despread signal; and a second adder for adding the multiplication results of the second multiplier and the fourth multiplier, said second adder outputting a Q-arm despread signal.