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AssigneeAgere Systems Inc.
InventorsGeert Arnout Awater, Robert John Kopmeiners, Didier Johannes Richard Van Nee
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The invention relates to a method for the detection of a symbol from a received signal wherein the symbol is a selected symbol out of a predetermined set of symbols, wherein each symbol of the predetermined set is a CCK symbol comprising a sequence of chips wherein each of the chips is PSK-modulated according to a selected modulation code wherein each of the selected modulation codes comprises a first sub-modulation code which is a selection from a plurality of first sets of predetermined phase modulating elements and a second sub-modulation code which is a selection from one second set of predetermined phase modulating elements wherein at least one of said predetermined phase modulating elements of said second set is a complex value such as defined in the high speed IEEE 802.11b standard, wherein a modulation code is selected from said modulation codes which correlates according to a correlation method with the received signal. The invention also relates to an apparatus for the detection of a symbol from a received signal wherein the symbol is a selected symbol out of a predetermined set of symbols, wherein each symbol of the predetermined set is a CCK symbol comprising a sequence of chips wherein each of the chips is PSK-modulated according to a selected modulation code wherein each of the selected modulation codes comprises a first sub-modulation code which is a selection form a plurality of first sets of predetermined phase modulating elements and a second sub-modulation code which is a selection from one second set of predetermined phase modulating elements wherein at least one of said predetermined phase modulating elements of the second set is a complex value such as defined in the high speed IEEE 802.11b standard, the apparatus comprising correlating means for correlating the received signal with said modulation codes according to a correlation method and means for selecting a modulation code from said modulation codes on the basis of the correlation.
A method for the detection of a symbol from a received signal wherein the symbol is a selected symbol out of a predetermined set of symbols, wherein each symbol of the predetermined set is a CCK symbol comprising a sequence of chips wherein each of the chips is PSK-modulated according to a selected modulation code wherein each of the selected modulation codes comprises a first sub-modulation code which is a selection from a plurality of first sets of predetermined phase modulating elements and a second sub-modulation code which is a selection from one second set of predetermined phase modulating elements wherein at least one of said predetermined phase modulating elements of said second set is a complex value such as defined in the high speed IEEE 802.11 standard, wherein a modulation code is selected from said modulation codes which correlates according to a correlation method with the received signal,
A method according to any preceding claim, characterised in that, the number of first modulation results obtained in step a. equals to C1*C2* . . . *Ci−1*Cl*Ci+1* . . . *Cn wherein Ci is the number of elements of the ith first set of the first sets.
A method according to any preceding claim, characterised in that, in step b in a first substep the selected first correlation result is phase-modulated with each of said possible second sub-modulation codes and in a second substep real values are determined from results obtained in the first substep for obtaining the second correlation results.
A method according to any preceding claim, characterised in that, the number of second modulation results obtained in step c. equals the number of predetermined phase modulating elements of the second set.
A method according to any preceding claim, characterised in that, in step c. a predetermined phase modulating element of the second set is selected which provides the selected second correlation result.
A method according to any preceding claim, characterised in that, in step d. the predetermined phase modulating elements of the first sets are selected which provides the selected first correlation result.
A method according to any preceding claim, characterised in that, in step a. a first correlator bank comprising a number of correlators is used, wherein this number of correlators equals the number of first correlation results.
A method according to any preceding claim, characterised in that, in step b. a second correlator bank comprising a number of correlators is used, wherein this number of correlators equals the number of second correlation results.
An apparatus for the detection of a symbol from a received signal wherein the symbol is a selected symbol out of a predetermined set of symbols, wherein each symbol of the predetermined set is a CCK symbol comprising a sequence of chips wherein each of the chips is PSK-modulated according to a selected modulation code wherein each of the selected modulation codes comprises a first sub-modulation code which is a selection from a plurality of first sets of predetermined phase modulating elements and a second sub-modulation code which is a selection from one second set of predetermined phase modulating elements wherein at least one of said predetermined phase modulating elements of said second set is a complex value such as defined in the high speed IEEE 802.11 standard, the apparatus comprising correlating means for correlating the received signal with said modulation codes according to a correlation method and means for selecting a modulation code from said modulation codes on the basis of the correlation,
Dependencies are inferred from the claim text.