CHANNEL ESTIMATION IN OFDM TRANSMISSION SYSTEM AND METHOD

摘要

A system and method is provided for estimating the channel in OFDM transmission with inter-carrier interference (ICI). A channel in a data subcarrier in a subchannel shared between pilot subcarriers and data subcarriers can be estimated by performing interpolation based on estimated channels in pilot subcarriers in the same OFDM symbol as the subcarrier, such as through spline interpolation. A second estimate of the channel in the subcarrier can be produced by averaging an estimate of the channel in a subcarrier in the subchannel in a previous OFDM symbol and an estimate of the channel in a subcarrier in the subchannel in a succeeding OFDM symbol. A third estimate of the channel in the subcarrier can be produced through a linear combination of the first estimate and the second estimate. The channel in data subcarriers can be estimated through a weighted sum of the channel in nearest subcarriers.

主权项

1. A method comprising:
receiving an OFDM signal with scatter pilots; producing a first estimate of a channel in a first estimated data subcarrier in a shared subchannel in an OFDM symbol of the OFDM signal through interpolation, wherein the interpolation is based on estimated channels in at least two pilot subcarriers in the OFDM symbol.