Patent ID: 6442192
Filing Date: 2002-08-27
Classification: H04B,H04L,H04W

Abstract:
A CDMA type multiple transmission apparatus, comprising:spread modulating means for spread-modulating pieces of transmission data of a plurality of channels by multiplying the transmission data of each channel by a spread code; multiplexing means for multiplexing the pieces of transmission data, which are spread-modulated by the spread modulating means, with each other and outputting a base band signal; transmitting means for orthogonally modulating the base band signal output by the multiplexing means and transmitting the base band signal orthogonally modulated as a transmission signal; receiving means for receiving the transmission signal transmitted by the transmitting means, orthogonally demodulating the transmission signal and outputting a demodulated base band signal; and correcting means for comparing the base band signal output by the multiplexing means with the demodulated base band signal output by the receiving means and correcting the base band signal output by the multiplexing means according to a compared result.