Patent ID: 6396868
Filing Date: 2002-05-28
Classification: H04B,H04J

Abstract:
A spread spectrum signal generating device in a transmitter of a mobile communications system using a pilot channel, a control channel, a voice data channel, and a packet data channel, comprising:a multiplexer for time multiplexing a pilot channel signal and a control channel signal; a first orthogonal encoder for orthogonally spreading the output of the multiplexer with an orthogonal code; a second orthogonal encoder for orthogonally spreading voice data of a variable bit rate with an orthogonal code; a third orthogonal encoder for orthogonally spreading packet data of a variable bit rate with an orthogonal code; an IQ signal mapper for adding the outputs of the first and third orthogonal encoders, outputting the added signal as a first channel signal, and outputting the output of the second orthogonal encoder as a second channel signal; and a PN spreader for spreading the first and second channel signals with PN codes and outputting a final spread spectrum signal, whereby a peak-to-average power ratio is minimized.