QAM demodulation
AssigneeNEC Corporation
InventorsXinhua Wang, Nikolay Vaptzarov, Shikand Satheesh
Life of this patent
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Abstract
A method of demodulating a signal on which is modulated, using a quadrature amplitude modulation scheme, a plurality of information symbols, the method including: determining at least one QAM detection threshold corresponding to one or more of said information symbols; and demodulating each information symbol on the basis of at least one respective QAM detection threshold.
Claims9
A method of demodulating a signal on which is modulated, using a quadrature amplitude modulation scheme, a plurality of information symbols, the method including:
- determining at least one QAM detection threshold corresponding to one or more of said information symbols;
- and
- demodulating each information symbol on the basis of at least one respective QAM detection threshold,
- wherein the information symbols modulated on the signal have a plurality data symbols arranged between a pair of successive pilot symbols, and
- wherein at least one common QAM detection threshold is determined for a less than the number of symbols between said successive pilot symbols.
An apparatus for demodulating a signal including a plurality of information symbols which are modulated using a quadrature amplitude modulation scheme, the apparatus including:
- means for determining at least one QAM detection threshold corresponding to one or more of said information symbols;
- and
- means for demodulating each information symbol on the basis of at least one respective QAM detection threshold,
- wherein the information symbols modulated on the signal have a plurality data symbols arranged between a pair of successive pilot symbols, and
- wherein at least one common QAM detection threshold is determined for a less than the number of symbols between said successive pilot symbols.
Dependencies are inferred from the claim text.