Single or dual complex subcarrier downconversion
First Claim
1. A method for subcarrier downconversion and data detection, the method comprising:
- determining whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and
processing, in a circuit, the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection,wherein the circuit includes correlator blocks corresponding to each of the sideband frequency sections;
wherein the correlator blocks include a series of windowed integrators that are configurable for different lengths;
wherein when the determination is to use outputs of both sideband sections, outputs of correlator blocks of the circuit are combined after magnitude detection and before data slicing; and
wherein outputs of the windowed integrators of each correlator block are added in a first path of the correlator block and subtracted in a second path of the correlator block, and wherein the magnitude detection is performed by complex-to-magnitude modules.
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Abstract
A method for subcarrier downconversion and data detection according to one embodiment includes determining whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and processing the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection. Such methodology may also be implemented as a system using logic for performing the various operations. Additional systems and methods are also presented.
84 Citations
8 Claims
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1. A method for subcarrier downconversion and data detection, the method comprising:
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determining whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and processing, in a circuit, the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection, wherein the circuit includes correlator blocks corresponding to each of the sideband frequency sections; wherein the correlator blocks include a series of windowed integrators that are configurable for different lengths; wherein when the determination is to use outputs of both sideband sections, outputs of correlator blocks of the circuit are combined after magnitude detection and before data slicing; and wherein outputs of the windowed integrators of each correlator block are added in a first path of the correlator block and subtracted in a second path of the correlator block, and wherein the magnitude detection is performed by complex-to-magnitude modules. - View Dependent Claims (2, 3, 4, 5)
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6. A system for subcarrier downconversion and data detection, the system comprising:
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logic configured to determine whether to use an upper sideband frequency section of a complex downconverter output, a lower sideband frequency section of the complex downconverter output, or both sideband frequency sections of the complex downconverter output; and a circuit configured to process the output corresponding to the selected sideband frequency section or sections based on the determination, wherein the processing includes correlation and data detection; wherein the circuit includes correlator blocks corresponding to each of the sideband frequency sections; wherein the correlator blocks include a series of windowed integrators that are configurable for different lengths; wherein the outputs of the correlator blocks are combined after magnitude detection and before data slicing when the determination is to use outputs of both sideband sections; and wherein outputs of the windowed integrators of each correlator block are added in a first path of the correlator block and subtracted in a second path of the correlator block, and wherein the magnitude detection is performed by complex-to-magnitude modules. - View Dependent Claims (7, 8)
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Specification