Estimator for determining signal-to-interference ratio with...

Details Estimator for determining signal-to-interference ratio with... Estimator for determining signal-to-interference ratio with...

2007-08-07

2007-08-07

Wachsman, Hal (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C702S189000, C702S069000, C375S227000

Reexamination Certificate

active

11430645

ABSTRACT:
A signal-to-interference ratio (SIR) estimator for estimating a SIR of baseband signals which are received and processed by a data demodulator to provide demodulated signals to the SIR estimator. The SIR estimator receives the demodulated symbols from the data demodulator and estimates the average signal power of the demodulated symbols as a function of a median based average power value mdand a mean based average power value meof the demodulated symbols for each quadrant of a quadrature phase shift keying (QPSK) constellation. The function is used to determine a minimum value m between mdand me. The SIR estimator estimates the average effective interference power of the demodulated symbols and calculates the SIR by dividing the estimated average signal power of the demodulated symbols by the estimated average effective interference power of the demodulated symbols.

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