Systems and methods for delta-sigma digitization
AssigneeCable Television Laboratories, Inc.
InventorsJing Wang, Luis Alberto Campos, Zhensheng Jia, Curtis Dean Knittle
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Abstract
A baseband processing unit includes a baseband processor configured to receive a plurality of component carriers of a radio access technology wireless service, and a delta-sigma digitization interface configured to digitize at least one carrier signal of the plurality of component carriers into a digitized bit stream, for transport over a transport medium, by (i) oversampling the at least one carrier signal, (ii) quantizing the oversampled carrier signal into the digitized bit stream using two or fewer quantization bits.
Claims20
A method of transmitting an input analog signal over a digital optical link, comprising the steps of:
- digitizing the input analog signal into digitized sequence within a target bandwidth of the digital optical link using a delta-sigma analog-to-digital converter (ADC);
- applying a noise transfer function (NTF) to the digitized sequence to generate a digitized output signal that is substantially separated, in the frequency domain, from quantization noise of the digitized sequence;
- and
- transmitting the digitized output signal to a remote receiving unit in operable communication with the digital optical link,
- wherein the NTF of the delta-sigma ADC corresponds to a filter of the remote receiving unit, such that the remote receiving unit is enabled to, upon receipt of the transmitted digitized output signal, retrieve from the digitized output signal a second analog signal that is substantially similar to the input analog signal within the target bandwidth.
Dependencies are inferred from the claim text.