Spectrally - are averaged over time for dynamic ieee 802.11p - channel equalization

摘要

A method for providing a channel equalization a from a transmitter to a receiver transmitted message using a predetermined transmission protocol and with a predetermined channel bandwidth, the method comprising:Separation of the channel bandwidth into a plurality of subcarriers with different auxiliary carrier frequencies, wherein the auxiliary carrier data auxiliary carrier and the pilot auxiliary carrier;Separation of the transmission of the message in the time in a plurality of symbols, which are transmitted at different times, wherein the transmission of the message contains both data symbols as well as pilot symbols;Demodulating the message in the receiver for extracting the symbols from the message;Determining an estimated channel - frequency responses for the pilot auxiliary carrier and for at least one of the data auxiliary carrier using an estimation method of least squares and of the extracted symbols;Interpolating the an estimated channel - frequency responses both for the pilot auxiliary carrier as well as for the data of the auxiliary carrier for generating updated an estimated channel - frequency responses;Creation of new an estimated channel - frequency responses for each extracted symbol with the use of a preceding an estimated channel - frequency response and the updated an estimated channel - frequency responses; andEqualizing of the extracted symbols using the new an estimated channel - frequency responses, whereina certain auxiliary carrier in a few symbols a pilot auxiliary carrier and in other symbols, a data auxiliary carrier is,the determination of the an estimated channel - frequency responses the determining the an estimated channel - frequency responses for all data auxiliary carrier and then determine which of these frequency responses a confidence parameter, which exceeds a predetermined threshold value, only those data auxiliary carrier frequency of gears, which have a confidence parameter different than, which exceeds the threshold value is interpolated and for the equalization are used, andthe determining whether a ..