US 9,178,580 B2 · Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks

Abstract

A method and apparatus for selecting an antenna mapping in multiple-in/multiple-out (MIMO) enabled wireless communication networks. A candidate set of currently available antenna mappings is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission begins. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are physical layer and medium access control layer frame formats for implementing antenna mapping selection according to the invention.

Claims8

Dependent claims

A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

selecting an antenna mapping from a plurality of currently available antenna mappings, wherein the selected antenna mapping comprises one or more of a radio frequency chain, an antenna selected from a plurality of antennas including at least one beamforming antenna, or an antenna beam selected from a plurality of antenna beams associated with the antenna;
estimating a channel associated with the selected antenna mapping based on a received physical layer packet data unit (PPDU);
generating a steering matrix associated with the antenna beam of the selected antenna mapping based on the estimated channel;
and
transmitting a data packet to a second WTRU using the selected antenna mapping and the steering matrix.

2 more elements

Dependencies are inferred from the claim text.

Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks

Life of this patent

Method and apparatus for antenna mapping selection in MIMO-OFDM wireless networks

Life of this patent

Abstract

Claims8