Patent ID: 7187912
Filing Date: 2007-03-06
Classification: H04B,H04W

Abstract:
1. A method for space diversity reception comprising: selecting from two or more antennae an active antenna that delivers a data-bearing signal having a signal quality at least as good as any of said antennae based upon measurements of said signal quality during reception of a preamble field of data frames having a substantially longer preamble field than other data frames, said data frames having a substantially longer preamble field than that of other data frames are received at substantially regular intervals; initiating said measurements of said signal quality periodically in anticipation of reception of said data frames having a substantially longer preamble field than that of other data frames; determining a length of said substantially regular intervals from a data field included in said data-bearing signal or in a synchronizing signal; initiating said measurements of said signal quality at intervals substantially equal in length to said length of said substantially regular intervals; and synchronizing said measurements of said signal quality to a specifically-recognizable element repeated periodically at substantially regular synchronization intervals of said data-bearing signal or said synchronizing signal.