Simultaneous analog and digital communications with a selection of different signal point constellations based on signal energy
DC
First Claim
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1. A communication method comprising the steps of:
- monitoring an energy of a first signal;
choosing a first signal point constellation from a plurality of signal point constellations based on said energy, wherein said plurality of signal point constellations comprises constellations having different signal point densities;
adding said first signal to a second signal to produce a combined signal, wherein said second signal is one of a plurality of signal points belonging to said first signal point constellation; and
transmitting said combined signal.
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Abstract
An analog signal is added to a data signal that specifies a symbol in a symbol constellation to produce a combined signal that is transmitted to a receiver. The symbol constellation is picked from a plurality of symbol constellations having differing symbol densities based on the amplitude of the analog signal.
47 Citations
22 Claims
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1. A communication method comprising the steps of:
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monitoring an energy of a first signal; choosing a first signal point constellation from a plurality of signal point constellations based on said energy, wherein said plurality of signal point constellations comprises constellations having different signal point densities; adding said first signal to a second signal to produce a combined signal, wherein said second signal is one of a plurality of signal points belonging to said first signal point constellation; and
transmitting said combined signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification
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Litigation Data
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Current AssigneePatent Business Development LLC
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Original AssigneeAT&T Corporation (AT&T, Inc.)
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InventorsSmithwick, Luke J., Bremer, Gordon, Ko, Kenneth D.
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Primary Examiner(s)Chin, Stephen
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Assistant Examiner(s)PHAN, HAI
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Application NumberUS08/076,516Time in Patent Office771 DaysField of Search375/37, 375/38, 375/39, 375/5, 375/41, 375/42, 375/52, 375/59, 375/67, 455/74, 455/93, 455/102, 370/18, 370/19, 370/20, 370/110.1, 370/110.4US Class Current375/295CPC Class CodesH04J 7/00 Multiplex systems in which ...H04L 27/3483 using a modulation of the c...
