Patent ID: 6075826
Filing Date: 2000-06-13
Classification: H04L

Abstract:
In a burst mode digital communication system, an apparatus for obtaining initial carrier and symbol phase estimates for use in synchronizing transmitted signals containing a binary phase shift keying (BPSK) preamble, comprising:a plurality of means for adding components of complex time domain samples, wherein at least one of said components is inverted by a first inverting means, which is connected to at least one of said component adding means, prior to being input into at least one of said component adding means, and at least another of said components is inverted by a second inverting means, which is connected to at least another of said component adding means, prior to being input into at least another of said component adding means;first and second means, each connected to at least one of said component adding means, for looking up arc tangents of values output from said plurality of complex component adding means;fourth and fifth means, each connected to at least one of said first and second means, for adding values output from said first and second look up means; anda third means, connected to at least one of said first and second means and connected to at least one of said fourth and fifth means, for inverting at least one of said values output from said first and second look up means.