Patent ID: 7242708
Filing Date: 2007-07-10
Classification: H04B

Abstract:
1. A method of detecting a spread spectrum composite signal (r) comprising plural user signals (b 1 ,b 2 , . . . ,b K ) that have been spread with spreading codes to minimize multiple access interference, comprising: a) receiving the composite signal (r) at a rake receiver; b) obtaining a rake receiver output z c) producing first hard-decision values b d) producing first parallel interference cancellation values z e) producing second hard-decision values b f) producing first combination values {circumflex over (b)} by combining the hard-decision values b g) producing second parallel interference cancellation values z h) producing third hard-decision values {circumflex over (b)} wherein: S=spreading code matrix; A=channel coefficient matrix; ( ) F=off-diagonal cross-correlation matrix.