A to D converters and look-up tables dimensioning for five-port reflectometer based systems

A M Thefive-porf repectometer hos been recently npplied lo demodulators and radars, allowing the trnmfer of analog circuit eomplexio to digit01 sipdpmcessimg. I n order lo operate in real-time mode, these systems demand optimized DSP olgorithms. One technique we hove been erploiling consists on using look-up tables 11, estlmole normolized power values from voltoges measwed at the repectometeer’s outputs. We evoluvte in this papar the errors incorporated by voltages mdlook-up table qumtizirotion. Comporbons bemeen diflerent combinations o/A/Df resolution m d LUT’s word size are done using measurement wIue3.

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