Patent ID: 6295273
Filing Date: 2001-09-25
Classification: H04B,H04J,H04L

Abstract:
A phase modulation multiplexing transmission unit comprising:signal division means for dividing a digital input signal;a plurality of spread code generation means for generating spread code signals for spectrum spreading;a plurality of multiplication means each for outputting a respective multiplication signal by multiplying an output of said signal division means by a respective spread code signal;a phase shifting means for shifting a phase of at least one multiplication signal output from said plurality of multiplication means so that each of said plurality of multiplication signals subject to the phase shifting means has a phase difference;addition means for generating a multiplexing signal by summing each of said multiplication signals including those having a phase difference and those not having a phase difference; andmodulation means for modulating the multiplexing signal from said addition means and for providing a modulated signal as an output; and furtherwherein said addition means sums a multiplication signal output form said multiplication means and a signal with its phase shifted through said phase shifting means.