Patent ID: 8199861
Filing Date: 2012-06-12
Classification: H04L

Abstract:
1. A channel estimator apparatus for estimating channel state information in an MIMO OFDM-enabled communication system that includes a set of signal detectors, at least two MIMO OFDM-enabled communication devices that each employ an antenna array that includes at least two transmit antennas, and a computing station that employs an antenna array having a number of receive antennas at least equal to the number of said communication devices, the channel estimator apparatus comprising: a first channel estimator and a second channel estimator, said first channel estimator including a first EM module and said second channel estimator including a second EM module; wherein said first EM module is disposed to calculate a first set of decomposed signals by at least decomposing a first consecutive set of superimposed frequency-domain signal blocks into said first set of decomposed signals, said first set of decomposed signals related to a first set of data previously processed by a first communication device, and to a second set of data previously processed by a second communication device; and further disposed to output a first set of last channel estimates; and wherein said second EM module is disposed to calculate a second set of decomposed signals by at least decomposing a second consecutive set of superimposed frequency-domain signal blocks into said second set of decomposed signals, said second set of decomposed signals related to said first set data and to said second set data; and further disposed to output a second set of last channel estimates.