System and methods for virtualizing delta sigma digitization
AssigneeCable Television Laboratories, Inc.
InventorsBelal Hamzeh, Zhensheng Jia, Luis Alberto Campos, Curtis Dean Knittle, Jing Wang
Life of this patent
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Abstract
A method for virtually performing delta-sigma digitization is provided. The method is performed on a series of digital samples output from a communication stack of a communication network. The method includes steps of obtaining a delta-sigma digitization sampling frequency for the output series of digital samples, calculating an oversampling ratio for the output series of digital samples, interpolating the output series of digital samples at a rate equivalent to the oversampling ratio, and quantizing the interpolated series of digital samples to plurality of discrete predetermined levels.
Claims16
A method for virtually performing delta-sigma digitization on a series of digital samples output from a communication stack of a communication network, the method comprising the steps of:
- obtaining a delta-sigma digitization sampling frequency for the output series of digital samples;
- calculating an oversampling ratio for the output series of digital samples;
- interpolating the output series of digital samples at a rate equivalent to the oversampling ratio;
- and
- quantizing the interpolated series of digital samples to a plurality of discrete predetermined levels,
- wherein the output series of digital samples includes a number K digital samples from the communication stack, where K is an integer greater than 1,
- wherein the oversampling ratio is represented by the symbol R, and
- wherein a number of samples resulting from the step of interpolating is equal to R*K.
A virtual delta-sigma digitization system for a communication network, the system including a processor in communication with a memory device configured to store a plurality of instructions, which, when executed by the processor, cause the processor to:
- obtain a delta-sigma digitization sampling frequency for a series of digital samples output from a communication stack of the communication network, the output series of digital samples including K digital samples, where K is an integer greater than 1;
- calculate an oversampling ratio, R, for the output series of digital samples;
- interpolate the output series of digital samples at a rate equivalent to the oversampling ratio to generate a number of samples equal to R*K;
- and
- quantize the interpolated series of digital samples to a plurality of discrete predetermined levels.
Dependencies are inferred from the claim text.