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Fault Detection

Method-for-using-a-non-orthogonal-pilot-signal-with-data-channel-interference-cancellation

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Method for using a non-orthogonal pilot signal with data channel interference cancellation

Details

Inventors: Rouphael, Antoine J.; Hoffmann, John E.; Nelson, Jr., George Rodney; Proctor, Jr., James A.;
Assignee: IPR Licensing, Inc. (Wilmington, DE)
Primary Examiner: Burd; Kevin
Assistant Examiner:
Attorney, Agent or Firm: Hamilton, Brook, Smith & Reynolds, P.C.

A system and method for encoding/decoding data channels in a CDMA system having data channel interference cancellation, wherein data channel interference cancellation is used to remove unwanted non-orthogonal pilot signal components which are present within a demodulated data signal. This is accomplished by regenerating interference terms with respect to the non-orthogonal pilot signal and subtracting them from the demodulated data signal.

DETAILED DESCRIPTION The present invention is directed to a method for encoding/decoding data channels in a system having data channel interference cancellation.
In accordance with the invention, the data rate of a system for a given user is increased by using a non-orthogonal pilot signal for channelization.
As a result, one or more orthogonal channels become available for user traffic, rather than for use by the pilot channel.
This leads to a reduction in the number of occupied orthogonal channels and an increase in system capacity available for each user due to the attainment of higher data rates which permit faster data delivery to system subscribers.
The use of a non-orthogonal pilot signal requires interference cancellation to remove the modulation effects of the pilot signal upon the data signal.
This is accomplished by regenerating interference terms with respect to the non-orthogonal pilot signal and subtracting them from the demodulated data signal.

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