Patent ID: 9219674
Filing Date: 2015-12-22
Classification: H04J,H04L

Abstract:
1. An apparatus for signal processing, comprising: a first autocorrelator configured to autocorrelate a received signal using a first time delay to produce a first correlation magnitude; a second autocorrelator configured to autocorrelate the received signal using a second time delay different from the first time delay to produce a second correlation magnitude for detecting null space or tone interferers; and a detector configured to determine whether the received signal comprises null space or tone interferers based on the second correlation magnitude and to determine whether the received signal comprises a packet preamble based on the first and second correlation magnitudes and based on if the received signal comprises null space or tone interferers, wherein at least a portion of the packet preamble comprises a repetitive sequence of a short training field, and the second autocorrelator is configured to autocorrelate the received signal using the second time delay that is less than a repetition interval of the repetitive sequence of the short training field.