The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 24, 2005
Filed:
Apr. 04, 2001
Jason Alexander Trachewsky, Menlo Park, CA (US);
Eric Ojard, San Francisco, CA (US);
Srinivasa Garlapati, Fremont, CA (US);
Alan Corry, Santa Clara, CA (US);
Jason Alexander Trachewsky, Menlo Park, CA (US);
Eric Ojard, San Francisco, CA (US);
Srinivasa Garlapati, Fremont, CA (US);
Alan Corry, Santa Clara, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A method of determining a collision between two or more transmitting stations at one of the transmitting stations on a frame-based communications network. A transmitted frame header includes a cyclic preamble wherein identical copies of a preamble symbol sequence are transmitted sequentially. A collision is declared if an estimate of error power in second and third copies of the preamble minus an estimate of error power in third and fourth copies of the preamble exceeds a first threshold, or a maximum value of the norm of each term of a source field error vector minus a greater of the estimate of the error power in the second and third copies of the cyclic preamble and the estimate of the error power in the third and fourth copies of the preamble exceeds a second threshold.