Device and method for determining a symbol during reception of a signal coupled with a quadrature signal pair (I,Q) for QAM frequency control and/or rotation control
First Claim
1. A device for determining a symbol during reception of a quadrature signal pair-coupled signal, comprising:
- a discriminator, configured to determine the symbol based on an analysis of a received signal in a complex coordinate space;
a control loop for at least one of quadrature amplitude modulation (QAM) frequency control and rotation control wherein control parameters are used, the control loop controlled depending on at least one symbol determined by the discriminator to adjust the control parameters for symbol decisions to be made later;
a weighting values device configured to provide a plurality of weighting values, each weighting value associated with a corresponding symbol determined by the discriminator or to be determined by the discriminator, each weighting value depending on a position of the corresponding symbol in the complex coordinate space;
a first weighting device configured as a constituent part of a rotation control device to weight a phase offset with a corresponding weighting value;
a second weighting device configured to apply weighting with one of the plurality of weighting values to a control value for a carrier control device;
wherein the first weighting device is configured to;
generate a rotation signal, andfurnish to the second weighting device an additional weighting value, which is used as another, delayed weighting value to apply additional weighting to the control value.
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Accused Products
Abstract
The invention relates to a device and a method for determining a symbol during reception of a signal coupled with a quadrature signal pair having a discriminator for the determination of a symbol with an analysis of a received signal in complex coordinate space, and a control loop for QAM frequency control and/or rotation control while control parameters are used, which are constructed and/or controlled depending on at least one of the symbols to be decided by the discriminator so that the control parameters are adjusted for decisions to be taken later, wherein one weighting device is constructed and/or controlled, providing in each case one weighting value for the symbols to be decided and/or decided by the discriminator among a plurality of weighting values depending on the symbol position in the complex coordinate space for the control loop.
11 Citations
13 Claims
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1. A device for determining a symbol during reception of a quadrature signal pair-coupled signal, comprising:
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a discriminator, configured to determine the symbol based on an analysis of a received signal in a complex coordinate space; a control loop for at least one of quadrature amplitude modulation (QAM) frequency control and rotation control wherein control parameters are used, the control loop controlled depending on at least one symbol determined by the discriminator to adjust the control parameters for symbol decisions to be made later; a weighting values device configured to provide a plurality of weighting values, each weighting value associated with a corresponding symbol determined by the discriminator or to be determined by the discriminator, each weighting value depending on a position of the corresponding symbol in the complex coordinate space; a first weighting device configured as a constituent part of a rotation control device to weight a phase offset with a corresponding weighting value; a second weighting device configured to apply weighting with one of the plurality of weighting values to a control value for a carrier control device; wherein the first weighting device is configured to; generate a rotation signal, and furnish to the second weighting device an additional weighting value, which is used as another, delayed weighting value to apply additional weighting to the control value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A method for determining a symbol during reception of a quadrature signal pair-coupled signal using at least one of quadrature amplitude modulation (QAM) frequency control and rotation control, the method comprising:
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determining a plurality of symbols using a discriminator based on control parameters; adjusting the control parameters depending on at least one determined symbol, for symbol decisions to be made later, and providing a weighting value corresponding to each symbol determined by the discriminator or to be determined by the discriminator to generate a plurality of weighting values, each weighting value depending on a position of the corresponding symbol in a complex coordinate space; weight a phase offset with a corresponding weighting value with a first weighting device configured as a constituent part of a rotation control device; apply weighting with one of the plurality of weighting values to a control value for a carrier control device with a second weighting device; wherein the first weighting device is configured to; generate a rotation signal, and furnish to the second weighting device an additional weighting value, which is used as another, delayed weighting value to apply additional weighting to the control value. - View Dependent Claims (9, 10, 11, 12)
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Specification