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1. (WO2001003319) TRANSMISSION OVER BUNDLED CHANNELS IN A CDMA MOBILE RADIO SYSTEM

Pub. No.:    WO/2001/003319    International Application No.:    PCT/EP2000/005955
Publication Date: Fri Jan 12 00:59:59 CET 2001 International Filing Date: Wed Jun 28 01:59:59 CEST 2000
IPC: H04B 1/707
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
Inventors: LI, Xiao, B.
Title: TRANSMISSION OVER BUNDLED CHANNELS IN A CDMA MOBILE RADIO SYSTEM
Abstract:
A transmitter apparatus and transmitting method are provided for implementing a high data rate multi-channel link in a digital Code Division Multiple Access (CDMA) wireless communications system composed of three or more individual lower data rate traffic channels represented in a transmitted combined RF signal, which are distributed over a set of phase offsets of a sinusoid carrier in the range of 0 to π radians, in which a combined complex spread spectrum signal, composed of an in-phase component and a quadrature-phase component, is formed prior to up-conversion in a manner that all the required phase offsets of the represented channels are introduced. The three or more individual lower data rate channels include two or more individual channels having phase offsets which are 0, π/2, or π radians, and one or more individual channels having phase offsets which are π/4 or 3π/4 radians. Individual complex spread spectrum signals are formed for the respective individual channels, each composed of an in-phase component and a quadrature-phase component. Further complex spread spectrum signals are derived therefrom (or merely repeated) for the individual channels in a manner including the introduction of fractional scaling factors having an absolute value substantially equal to √ ∑2/2 for the channels having phase offsets of (/4 or 3(/4 radians, and these derived signals are additively combined to form the complex combined spread spectrum signal.