System and method for iteratively determining quantization intervals of a remote ADC and modem employing the same
US5999564A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Mar 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/1438
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
For use with a central communications device digitally-coupled to a digital telecommunications network that includes an analog interface having an analog-to-digital converter ("ADC"), a system and method for iteratively determining quantization intervals of the ADC and a modulator/demodulator ("modem") employing the system or the method. The system includes: (1) a signal generator, coupled to an input of the ADC, that generates a sequence of analog signals to be quantized by the ADC to yield resulting symbols for reception into the central communications device and (2) an analyzer, that receives a return signal from the central communications device, the return signal indicating comparisons by the central communications device of the resulting symbols with expected symbols, the comparisons allowing the analyzer to determine threshold values between the quantization intervals of the ADC, the quantization intervals being a function of the threshold values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.