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US 7,443,919 B2Granted
Channel estimation for wireless systems with multiple transmit antennas
AssigneeAT&T Corp.
InventorYe Li
Life of this patent
Estimating the term…
Abstract
In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols.
Claims13
A method of characterizing one or more communication channels, comprising:
- receiving a set of first symbols associated with a first communication channel;
- receiving a set of second symbols associated with a second communication channel;
- and
- characterizing at least a first communication channel based on at least the set of first symbols and the set of second symbols to produce a set of first channel characteristics;
- wherein characterizing one or more communication channels is performed by selecting a plurality of training symbols disposed within said at least the set of first symbols and the set of second symbols, where a correlation between two different sets of said training symbols is zero.
2 more elements
An apparatus for communicating, comprising:
- a receive device that receives at least a set of first training symbols transmitted by a first transmit device and a set of second training symbols transmitted by a second transmit device;
- and
- an estimator that estimates at least a first channel related to the first transmit device based on at least the set of first training symbols;
- wherein a cross-correlation between two different sets of the first set of training symbols and the second set of training symbols is zero.
1 more element
Dependencies are inferred from the claim text.