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:
Jul. 03, 2012
Filed:
Nov. 27, 2007
Thomas Richardson, South Orange, NJ (US);
Hui Jin, Jersey City, NJ (US);
Rajiv Laroia, Far Hills, NJ (US);
Junyi LI, Chester, NJ (US);
Thomas Richardson, South Orange, NJ (US);
Hui Jin, Jersey City, NJ (US);
Rajiv Laroia, Far Hills, NJ (US);
Junyi Li, Chester, NJ (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Methods and apparatus for improving the utilization of air link resources in a wireless communications system, e.g., an OFDM MIMO system, including a base station with multiple transmit antennas are described. Superposition signaling in the downlink is employed. The superimposed signal includes a first transform result signal and a second lower power signal. The first transform result signal is generated from a first signal, which uses position modulation, e.g., including null components and high power non-null components. Different components of the first transform result signal are directed to different transmit antennas. The first transform result signal communicates information to a first wireless terminal, e.g., a weak receiver. The non-null received elements of the first transform result signal are utilized by a second wireless terminal, e.g., a superior receiver, as pilots to determine a channel estimate. The second wireless terminal uses the determined channel estimate to demodulate received second signals.