US 7,321,564 B2
Hybrid IMMSE-LMMSE receiver processing technique and apparatus for a MIMO WLAN
Muhammad Zubair Ikram, Richardson, Tex. (US); Srinath Hosur, Plano, Tex. (US); Michael O. Polley, Garland, Tex. (US); and Manish Goel, Plano, Tex. (US)
Assigned to Texas Instruments Incorporated, Dallas, Tex. (US)
Filed on Jan. 26, 2004, as Appl. No. 10/765,009.
Prior Publication US 2005/0163041 A1, Jul. 28, 2005
Int. Cl. H04J 1/16 (2006.01)
U.S. Cl. 370—252  [370/204; 370/206; 370/208; 370/338] 11 Claims
OG exemplary drawing
 
1. A method of decoding a constellation transmitted on subchannels of orthogonal frequency division multiplexed (OFDM) symbols in a wireless communication system, the method comprising:
receiving a signal comprising a constellation of transmitted OFDM symbols;
decoding an OFDM symbol having a higher signal-to-noise ratio (SNR) among the received OFDM symbols;
estimating the probability that a correct OFDM symbol has been decoded;
decoding the next higher SNR OFDM symbol via linear minimum mean-squared error estimation (LMMSE) processing if the probability of error exceeds a predetermined threshold; and
subtracting the contribution of decoded symbol from the received signal followed by decoding the next higher-SNR OFDM symbol via iterative minimum mean-squared error estimation (IMMSE) processing if the probability of error does not exceed the predetermined threshold.