Spread spectrum signal generating device utilising a selected one of a plurality of different spreading techniques.

摘要

A device for generating a spread spectrum signal according to various spreading techniques, securing compatibility with an existing spreading technique. The spread spectrum signal generating device first to third spreading parts supporting first to third spreading techniques, respectively. The first spreading part multiplies a coded data signal by an I-arm PN code and a Q-arm PN code to generate a first I-arm spread signal and a first Q-arm spread signal. The second spreading part inverts one of the I-arm PN code and the Q-arm PN code, multiplies the coded data signal by the Q-arm PN code or the inverted Q-arm PN code to generate a second I-arm spread signal and multiplies the code data signal by the I-arm PN code or the inverted I-arm PN code to generate a second Q-arm spread signal. The third spreading part multiplies the coded data signal by the I-arm PN code and the Q-arm PN code to generate a third I-arm spread signal and a third Q-arm spread signal. A selecting part selects one of the I-arm spread signals and one of the Q-arm spread signals generated from the first to third spreading parts according to a spreading technique determination signal.