Patent ID: 8660200
Filing Date: 2014-02-25
Classification: H04L

Abstract:
1. A channel estimation and data demodulation method for use in a communication system, the method comprising: performing a first channel estimate for a subset of data subcarriers of a symbol received by a receiver in the communication system according to a first pattern, the symbol including one or more reference subcarriers, wherein the first channel estimate is performed according to the first pattern by initially estimating a first data subcarrier from the subset of data subcarriers along a frequency axis thereof, the first data subcarrier being adjacent to one of the one or more reference subcarriers along the frequency axis; performing a second channel estimate on the same subset of data subcarriers along the frequency axis according to a second pattern, the second pattern being different than the first pattern, wherein the second channel estimate is performed according to the second pattern by initially estimating a second data subcarrier from the same subset of data subcarriers along the frequency axis, the second data subcarrier being adjacent to the same or a different one of the one or more reference subcarriers used in the channel estimation with the first pattern, the second data subcarrier being different than the first data subcarrier; obtaining a multi-pass channel estimate for each of the data subcarriers in the same subset along the frequency axis by combining the first and second channel estimates; equalizing the data subcarriers based on the multi-pass channel estimate thereof; and demodulating the equalized data subcarriers to obtain demodulated data.