Patent ID: 6917642
Filing Date: 2005-07-12
Classification: H04B

Abstract:
1. A method for encoding data channels in a CDMA system having data channel interference cancellation, comprising the steps of: generating a non-orthogonal pilot signal by modulating a pilot signal using a pilot channel code that is non-orthogonal to codes used to modulate other channels; mixing a data signal having an in-phase portion and a quadrature phase portion with a specific user channel code; producing resultant signals by summing the non-orthogonal pilot signal and the mixed data signal; modulating the resultant signals using a PN code; baseband discriminating the in-phase and the quadrature phase portions of the data signal to produce second resultant signals; modulating the discriminated in-phase portion and quadrature phase portion of the data signal; forming a composite output signal; and transmitting the composite output signal to a base station.