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:
Oct. 09, 2012
Filed:
Jul. 28, 2011
Christopher J. Hansen, Los Altos, CA (US);
Jason A. Trachewsky, Menlo Park, CA (US);
Rajendra Tushar Moorti, Mountain View, CA (US);
Matthew James Fischer, Mountain View, CA (US);
Christopher Young, Cupertino, CA (US);
Christopher J. Hansen, Los Altos, CA (US);
Jason A. Trachewsky, Menlo Park, CA (US);
Rajendra Tushar Moorti, Mountain View, CA (US);
Matthew James Fischer, Mountain View, CA (US);
Christopher Young, Cupertino, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna, generating a carrier detect field. The method continues by, for a first grouping of the transmit antennas, generating a first guard interval following the carrier detect field; and generating at least one channel sounding field. Continuing, the method applies cyclical shift prior to transmission via the first grouping of the transmit antennas. When the MIMO wireless communication includes more than the first grouping of the transmit antennas, for another grouping of the transmit antennas. For the another grouping of the transmit antennas, generating at least one other channel sounding field. The method proceeds by generating the first guard interval prior to the at least one other channel sounding field, and applying another cyclical shift prior to transmission via the another grouping of the transmit antennas.