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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAlexander Golitschek Edler Von Elbwart, Eiko Seidel
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The invention relates to a method and a receiver for demodulating a modulation symbol in a communication system without knowledge of the modulation constellation employed in a transmitter to modulate this symbol before transmission. According to the method, the invention comprises the steps of interpreting the modulation symbol as a symbol of one of a family of hierarchical modulation constellations, decoding the demodulated symbol using a forward error correction (FEC) technique and demodulating the symbol according to the assumed modulation constellation. Finally, the demodulated symbol is checked for correctness. The receiver comprises of a corresponding interpretation unit, a demodulator and an FEC decoder as well as means for checking the correctness of the demodulated symbol.
A method of demodulating a modulation symbol in a receiver of a communication system without knowledge of the modulation constellation employed in a transmitter to modulate the symbol before transmission, comprising the steps of:
The method according to one of claims 14, wherein the interpretation step and the demodulation step are carried out simultaneously for a plurality of different possible modulation constellations and further comprising the step of selecting the demodulated symbols depending on the result of the check for correctness.
A receiver in a communication system for demodulating a modulation symbol without knowledge of the modulation constellation employed in a transmitter to modulate the symbol prior to transmission, comprising:
Dependencies are inferred from the claim text.