Shaped signal spaces in a simultaneous voice and data system
First Claim
Patent Images
1. A method for transmitting comprising the steps of:
 a) selecting a data symbol as a function of a data signal, where each data symbol represents a different one of a number of regions of an Ndimensional signal space, and each data symbol is associated with a different Ndimensional signal point in the Ndimensional signal space;
b) selecting an Ndimensional signal point as a function of an applied signal, where the signal point is selected from the Ndimensional signal space;
c) adding the signal space coordinates of the selected data symbol and the selected Ndimensional signal point to provide a resultant signal point;
where each resultant signal point is taken from the region associated with the data symbol and where each one of the number of regions has a nonsquare shape.
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Abstract
In a simultaneous voice and data communications system, a voice signal is mapped into an Ndimensional signal space constellation as a vector, and added to a reference signal point, i.e., a data symbol, where the data symbol is selected from a constellation of data symbols every signaling interval as a function of a data signal. The constellation signal space is further divided into a number of shaped regions, where each region is associated with a different one of the data symbols. The shape of each region is selected as a function of the characteristics of the voice, or audio, signal. In particular, each region illustratively has a rectangular shape.
29 Citations
14 Claims

1. A method for transmitting comprising the steps of:

a) selecting a data symbol as a function of a data signal, where each data symbol represents a different one of a number of regions of an Ndimensional signal space, and each data symbol is associated with a different Ndimensional signal point in the Ndimensional signal space; b) selecting an Ndimensional signal point as a function of an applied signal, where the signal point is selected from the Ndimensional signal space; c) adding the signal space coordinates of the selected data symbol and the selected Ndimensional signal point to provide a resultant signal point; where each resultant signal point is taken from the region associated with the data symbol and where each one of the number of regions has a nonsquare shape.  View Dependent Claims (2, 3, 4)


5. A method for use in a communications system for transmitting a data signal and an applied signal, comprising the steps of:

defining a number of Ndimensional signal spaces, where each Ndimensional signal space includes a number of regions and where at least two of the Ndimensional signal spaces have a different number of regions and a size of at least one dimension of each region is identical; selecting one of the number of Ndimensional signal spaces; and transmitting an Ndimensional signal point from the selected Ndimensional signal space, where the Ndimensional signal point is taken from one of the number of regions of the selected Ndimensional signal space as a function of the data signal and the applied first signal, wherein the applied signal is a voice signal and the shape of each region is proportional to the dynamic range of the voice signal.  View Dependent Claims (6)


7. A method for transmitting comprising the steps of:

processing a first signal to provide a sequence of Ndimensional first signal points, each first signal point taken from an Ndimensional signal space, where each first signal point of the sequence defines a respective first signal vector from the origin of the signal space to the first signal point; processing a data signal to provide a sequence of data symbols, each data symbol associated with a different Ndimensional signal point from the signal space; adding each first signal vector to a respective data symbol from the sequence of data symbols to prove a sequence of resultant signal points; and transmitting a signal that represents the sequence of resultant signal points; where the magnitudes of at least one of the first signal vectors is limited in one dimension more than in another dimension.  View Dependent Claims (8)


9. Apparatus for transmitting comprising:

first selecting means for selecting an Ndimensional signal point as a function of a first signal where the signal point is selected from an Ndimensional signal space; second selecting means for selecting a data symbol as a function of a data signal, where each data symbol represents one of a number of regions of the signal space, and each data symbol is associated with a different signal point in the Ndimensional signal space; and means for adding in every signaling interval, T, the signal space coordinates of the two selected signal points to provide a resultant signal point; where each resultant signal point is taken from the region associated with the data symbol occurring in a respective signaling interval, and where each one of the number of regions has a nonsquare shape.  View Dependent Claims (10, 11, 12)


13. Apparatus for transmitting comprising:

means for processing a first signal to provide sequence of Ndimensional first signal points, each first signal point taken from an Ndimensional signal space, where each first signal point of the sequence defines a respective first signal vector from the origin of the signal space to the first signal point; means for processing a data signal to provide a sequence of data symbols, each data symbol associated with a different Ndimensional signal point from the signal space; means for adding each first signal vector to a respective data symbol from the sequence of data symbols to prove a sequence of resultant signal points; and means for transmitting a signal that represents the sequence of resultant signal points; where the magnitudes of at least one of the first signal vectors is limited in one dimension more than in another dimension.  View Dependent Claims (14)

1 Specification