Patent ID: 8374285
Filing Date: 2013-02-12
Classification: H04L

Abstract:
1. A method for computing channel estimates of a communications channel using time domain interpolation, wherein training data is transmitted over scattered sub-carriers, the method comprising: storing symbols received over the communications channel in a buffer; using time domain interpolation a first time to compute channel estimates for a set of sub-carriers of a symbol being processed, wherein the sub-carriers are capable of containing training data for other symbols but do not contain training data for the symbol being processed, wherein the time domain interpolation computes the channel estimates from the symbol being processed and a first number of required symbols, in response to determining that all of the required symbols are in the buffer; and using time domain interpolation a second time to compute channel estimates for the set of sub-carriers of the symbol being processed, wherein the time domain interpolation computes the channel estimates from the symbol being processed, a second number of buffered required symbols, and a buffered symbol used as a missing required symbol, in response to a determining that the missing required symbol is not in the buffer.