| 摘要 |
There is disclosed a method and apparatus for removing a dc offset from a received signal in linear modulation system channel estimator. Transmitted signal includes a know set of symbols (midamble). Channel is estimated in dependence on the received signal and the known set of symbols. A known vector associated with the dc offset may be introduced into a matrix defining the known symbols. A single step may estimate the dc offset and the channel based on the least square principle. A further aspect determines whether the symbols in the data part are evenly distributed or not. If the symbols in the data part are evenly distributed, then the mean value of the dc offset is determined in dependence on the data part of the burst in combination with the midamble part of the burst. Otherwise, the mean value of the dc offset is determined in dependence on the midamble part of the burst only. <IMAGE>
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