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:
Mar. 03, 2009
Filed:
Jun. 04, 2001
Sridhar Gollamudi, Pine Brook, NJ (US);
Sridhar Gollamudi, Pine Brook, NJ (US);
Alcatel-Lucent USA Inc., Murray Hill, NJ (US);
Abstract
There is disclosed a duplex communication system having multiple antennae at the forward link transmitter. One method of transmitting a stream of information symbols from the antennae is by beamforming. With beamforming the transmitter typically operates in closed loop and uses channel information from the receiver to change beams in the forward link. Another approach employs orthogonal coding. Orthogonal coding can be simpler to implement because it can operate in an open loop system that is without channel knowledge at the transmitter. Each has its advantages and disadvantages. What is here disclosed is a method which is an alternative to using only beamforming or orthogonal coding. The signals transmitted from at least two antennae are by beamforming or orthogonal coding; or by beamforming in combination with orthogonal coding in a proportion that is determined by a reference value which is related to the differences between the signals from the antennae. The reference value can be related to the amplitude or phase of the signals and it can be either measured or estimated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile