Abstract :
In modern telecommunication systems, there are situations when test instruments must work over hundreds of narrowband-frequency channels. It is difficult and expensive, however, to build hardware test equipment with a flat frequency response over their full operational frequency range. In this situation simple finite impulse response (FIR) filters can be applied for gain compensation to improve an instrument´s frequency response flatness. This column describes a very fast method for run time design of these filters, while minimizing storage requirements, based on test instrument calibration data.
Keywords :
FIR filters; calibration; compensation; digital signal processing chips; frequency response; DSP; calibration data; finite impulse response filters; frequency response compensation; gain compensation; narrowband-frequency channels; operational frequency range; response flatness; run time design; storage requirements; test instruments; Attenuation; Calibration; Delay; Digital signal processing; Filtering; Finite impulse response filter; Frequency response; IIR filters; Instruments; Testing;
