Patent ID: 6868110
Filing Date: 2005-03-15
Classification: G01S,H04B

Abstract:
1. A method for mitigating the effect of multipath signals on envelope tracking of a primary signal by a spread-spectrum receiver, wherein said primary signal comprises a carrier signal modulated by an envelope, and wherein a received signal comprises said multipath signals and said primary signal, said method comprising: a) locating an ideal multipath-invariant point in an ideal comparison function, thereby determining an ideal distance between said ideal multipath-invariant point and an ideal multipath-dependent point, wherein said ideal comparison function is computed from an ideal signal that does not comprise multipath signals; b) correlating to step (a), locating a corresponding multipath-invariant point in an actual comparison function, thereby determining an actual distance between said corresponding multipath-invariant point and a corresponding multipath-dependent point, wherein said actual comparison function is computed from said received signal; c) comparing said ideal distance and said actual distance; and d) based on said comparing in step (c), mitigating the effect of said multipath signals on said envelope tracking of said primary signal.