United States Patent 7,893,872
Kostanic February 22, 2011
--------------------------------------------------------------------------------
Method and apparatus for performing blind signal separation in an OFDM MIMO system
Abstract
A method and apparatus for performing blind signal separation in an orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) system are disclosed. A transmitter generates a plurality of spatial streams of data and transmits the spatial streams via a plurality of transmit antennas. A receiver receives the transmitted spatial data streams with a plurality of receive antennas and generates a plurality of receive data streams. The receiver performs a discrete Fourier transform (DFT) on each of the receive data streams to generate a plurality of frequency domain data streams. The receiver then performs a blind signal separation on the frequency domain data streams to recover spatial streams transmitted by the transmitter. The blind signal separation may be performed by using an independent component analysis (ICA) in the complex domain. The blind signal separation may be performed individually for each OFDM subcarrier.
--------------------------------------------------------------------------------
Inventors: Kostanic; Ivica (Palm Bay, FL)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/739,181
Filed: April 24, 2007
--------------------------------------------------------------------------------
Related U.S. Patent Documents
--------------------------------------------------------------------------------
Application Number Filing Date Patent Number Issue Date
60795298 Apr., 2006
--------------------------------------------------------------------------------
Current U.S. Class: 342/378 ; 342/373; 375/130; 375/260; 375/267; 375/316; 706/20
Current International Class: G01S 3/16 (20060101)
Field of Search: 375/316,267,260 702/190 706/20,190 708/205 704/233 455/306 342/378,373 250/282
PPP
"Intellectuals solve problems; geniuses prevent them." - Albert Einstein
