Reducing peak to average ratio of transmit signal by intentional phase rotating among composed signals

An apparatus for reducing power amplifier headroom in a wireless transmission system comprising:

• a means for selecting at least one wireless user;
• a means for allocating multiple channels to said at least one selected wireless user;
• phase rotation circuit for rotating phase among said allocated multiple channels.

The apparatus as recited in claim I1I wherein said phase rotation among said allocated multiple channels comprises an incremental phase rotation across said allocated multiple channels.

An apparatus for reducing power amplifier headroom in a CDMA transmission system comprising:

• an orthogonal modulation circuit utilizing a Walsh code for modulating an in-phase signal and a quadrature signal, said orthogonal modulation circuit having an in-phase output and a quadrature output;
• phase rotation circuit for rotating phase coupled to said in-phase output and said quadrature output for producing a phase rotated in-phase signal and a phase rotated quadrature signal;
• wherein multiple channels defined by Walsh codes are associated with a particular wireless user.